./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.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/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:34:41,094 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:34:41,138 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:34:41,142 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:34:41,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:34:41,157 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:34:41,158 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:34:41,158 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:34:41,159 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:34:41,159 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:34:41,159 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:34:41,159 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:34:41,160 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:34:41,160 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:34:41,160 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:34:41,161 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:34:41,161 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:34:41,161 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:34:41,162 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:34:41,162 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:34:41,162 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:34:41,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:34:41,163 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:34:41,163 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:34:41,163 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:34:41,163 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:34:41,164 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:34:41,164 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:34:41,164 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:34:41,164 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:34:41,165 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:34:41,165 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:34:41,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:34:41,165 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:34:41,166 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:34:41,166 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:34:41,166 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:34:41,166 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:34:41,166 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:34:41,167 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:34:41,167 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:34:41,167 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:34:41,167 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:34:41,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 02:34:41,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:34:41,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:34:41,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:34:41,359 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:34:41,359 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:34:41,360 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-28 02:34:41,488 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:34:41,488 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:34:41,489 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:34:42,536 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:34:42,723 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:34:42,723 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:34:42,741 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0057bec78/e65540455a2441bab9bd14ba2dc16b7f/FLAGe5326f57a [2024-06-28 02:34:42,751 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0057bec78/e65540455a2441bab9bd14ba2dc16b7f [2024-06-28 02:34:42,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:34:42,752 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:34:42,753 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:34:42,753 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:34:42,757 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:34:42,757 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:34:41" (1/2) ... [2024-06-28 02:34:42,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef31084 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:34:42, skipping insertion in model container [2024-06-28 02:34:42,758 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:34:41" (1/2) ... [2024-06-28 02:34:42,759 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17c2dd32 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:34:42, skipping insertion in model container [2024-06-28 02:34:42,759 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:34:42" (2/2) ... [2024-06-28 02:34:42,759 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef31084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:42, skipping insertion in model container [2024-06-28 02:34:42,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:34:42" (2/2) ... [2024-06-28 02:34:42,760 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:34:42,800 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:34:42,801 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 02:34:42,801 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 02:34:42,801 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 02:34:42,801 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:34:42,801 INFO L106 edCorrectnessWitness]: ghost_update [L776-L776] multithreaded = 1; [2024-06-28 02:34:42,833 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:34:43,042 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:34:43,055 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:34:43,167 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:34:43,197 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:34:43,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43 WrapperNode [2024-06-28 02:34:43,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:34:43,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:34:43,199 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:34:43,199 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:34:43,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,229 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-28 02:34:43,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:34:43,230 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:34:43,230 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:34:43,230 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:34:43,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,239 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,248 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 02:34:43,248 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,248 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,252 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,254 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,255 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,256 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,258 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:34:43,258 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:34:43,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:34:43,258 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:34:43,259 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (1/1) ... [2024-06-28 02:34:43,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:34:43,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:34:43,293 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 02:34:43,295 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 02:34:43,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:34:43,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:34:43,337 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:34:43,337 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:34:43,337 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:34:43,338 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:34:43,338 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:34:43,338 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:34:43,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:34:43,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:34:43,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:34:43,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:34:43,339 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 02:34:43,430 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:34:43,431 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:34:43,602 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:34:43,602 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:34:43,655 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:34:43,655 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:34:43,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:34:43 BoogieIcfgContainer [2024-06-28 02:34:43,656 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:34:43,657 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:34:43,657 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:34:43,660 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:34:43,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:34:41" (1/4) ... [2024-06-28 02:34:43,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155d1fc9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:34:43, skipping insertion in model container [2024-06-28 02:34:43,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:34:42" (2/4) ... [2024-06-28 02:34:43,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155d1fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:34:43, skipping insertion in model container [2024-06-28 02:34:43,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:34:43" (3/4) ... [2024-06-28 02:34:43,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155d1fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:34:43, skipping insertion in model container [2024-06-28 02:34:43,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:34:43" (4/4) ... [2024-06-28 02:34:43,662 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:34:43,676 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:34:43,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 02:34:43,676 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:34:43,704 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:34:43,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 02:34:43,744 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-28 02:34:43,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:34:43,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 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. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 02:34:43,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 02:34:43,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-28 02:34:43,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:34:43,760 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;@7a406b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:34:43,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 02:34:43,762 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:34:43,762 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:34:43,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:34:43,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:43,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:34:43,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:43,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash 217843597, now seen corresponding path program 1 times [2024-06-28 02:34:43,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:43,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180273343] [2024-06-28 02:34:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:43,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:44,099 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 02:34:44,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:44,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180273343] [2024-06-28 02:34:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180273343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:44,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:44,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:34:44,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724243909] [2024-06-28 02:34:44,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:44,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:34:44,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:44,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:34:44,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:34:44,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-28 02:34:44,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 02:34:44,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:44,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-28 02:34:44,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:44,291 INFO L124 PetriNetUnfolderBase]: 471/816 cut-off events. [2024-06-28 02:34:44,291 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-28 02:34:44,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1604 conditions, 816 events. 471/816 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4041 event pairs, 288 based on Foata normal form. 1/772 useless extension candidates. Maximal degree in co-relation 1592. Up to 733 conditions per place. [2024-06-28 02:34:44,303 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-28 02:34:44,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-28 02:34:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:34:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:34:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-28 02:34:44,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-28 02:34:44,314 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-28 02:34:44,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-28 02:34:44,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:34:44,319 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-28 02:34:44,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-28 02:34:44,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-28 02:34:44,323 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-28 02:34:44,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 02:34:44,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:44,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:44,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:34:44,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:44,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:44,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1105673172, now seen corresponding path program 1 times [2024-06-28 02:34:44,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:44,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270329654] [2024-06-28 02:34:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:44,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:44,443 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 02:34:44,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:44,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270329654] [2024-06-28 02:34:44,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270329654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:44,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:44,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:34:44,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796750057] [2024-06-28 02:34:44,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:44,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:34:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:34:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:34:44,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-28 02:34:44,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:34:44,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:44,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-28 02:34:44,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:44,633 INFO L124 PetriNetUnfolderBase]: 472/820 cut-off events. [2024-06-28 02:34:44,634 INFO L125 PetriNetUnfolderBase]: For 164/172 co-relation queries the response was YES. [2024-06-28 02:34:44,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 820 events. 472/820 cut-off events. For 164/172 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4030 event pairs, 232 based on Foata normal form. 7/809 useless extension candidates. Maximal degree in co-relation 1864. Up to 707 conditions per place. [2024-06-28 02:34:44,641 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 36 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-06-28 02:34:44,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 256 flow [2024-06-28 02:34:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:34:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:34:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-28 02:34:44,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.725 [2024-06-28 02:34:44,669 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 116 transitions. [2024-06-28 02:34:44,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 256 flow [2024-06-28 02:34:44,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:34:44,672 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 170 flow [2024-06-28 02:34:44,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-06-28 02:34:44,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-28 02:34:44,674 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 170 flow [2024-06-28 02:34:44,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:34:44,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:44,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:44,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:34:44,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:44,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1589893622, now seen corresponding path program 1 times [2024-06-28 02:34:44,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:44,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220188490] [2024-06-28 02:34:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:44,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:44,800 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 02:34:44,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:44,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220188490] [2024-06-28 02:34:44,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220188490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:44,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:44,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:34:44,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310444776] [2024-06-28 02:34:44,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:44,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:34:44,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:44,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:34:44,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:34:44,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:44,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:34:44,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:44,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:44,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:44,929 INFO L124 PetriNetUnfolderBase]: 728/1202 cut-off events. [2024-06-28 02:34:44,930 INFO L125 PetriNetUnfolderBase]: For 812/812 co-relation queries the response was YES. [2024-06-28 02:34:44,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3278 conditions, 1202 events. 728/1202 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5880 event pairs, 392 based on Foata normal form. 2/1203 useless extension candidates. Maximal degree in co-relation 3263. Up to 1104 conditions per place. [2024-06-28 02:34:44,938 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 44 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-28 02:34:44,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 327 flow [2024-06-28 02:34:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:34:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:34:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-28 02:34:44,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-28 02:34:44,943 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 170 flow. Second operand 4 states and 102 transitions. [2024-06-28 02:34:44,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 327 flow [2024-06-28 02:34:44,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 59 transitions, 323 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 02:34:44,947 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 229 flow [2024-06-28 02:34:44,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=229, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-06-28 02:34:44,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-28 02:34:44,948 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 229 flow [2024-06-28 02:34:44,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:34:44,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:44,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:44,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:34:44,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:44,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1070247574, now seen corresponding path program 1 times [2024-06-28 02:34:44,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:44,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930598699] [2024-06-28 02:34:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:44,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:45,130 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 02:34:45,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:45,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930598699] [2024-06-28 02:34:45,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930598699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:45,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:45,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403203644] [2024-06-28 02:34:45,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:45,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:45,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:45,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:45,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-28 02:34:45,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:45,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:45,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-28 02:34:45,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:45,313 INFO L124 PetriNetUnfolderBase]: 722/1212 cut-off events. [2024-06-28 02:34:45,313 INFO L125 PetriNetUnfolderBase]: For 1438/1450 co-relation queries the response was YES. [2024-06-28 02:34:45,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3635 conditions, 1212 events. 722/1212 cut-off events. For 1438/1450 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6019 event pairs, 189 based on Foata normal form. 20/1220 useless extension candidates. Maximal degree in co-relation 3616. Up to 978 conditions per place. [2024-06-28 02:34:45,321 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 54 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-28 02:34:45,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 485 flow [2024-06-28 02:34:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-28 02:34:45,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-06-28 02:34:45,323 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 229 flow. Second operand 6 states and 166 transitions. [2024-06-28 02:34:45,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 485 flow [2024-06-28 02:34:45,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 481 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 02:34:45,326 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 308 flow [2024-06-28 02:34:45,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-28 02:34:45,327 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-28 02:34:45,327 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 308 flow [2024-06-28 02:34:45,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:45,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:45,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:45,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:34:45,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:45,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1113959529, now seen corresponding path program 1 times [2024-06-28 02:34:45,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:45,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457056705] [2024-06-28 02:34:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:45,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:45,400 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 02:34:45,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:45,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457056705] [2024-06-28 02:34:45,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457056705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:45,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:45,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:34:45,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286945847] [2024-06-28 02:34:45,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:45,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:34:45,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:34:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:34:45,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:45,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 02:34:45,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:45,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:45,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:45,546 INFO L124 PetriNetUnfolderBase]: 763/1270 cut-off events. [2024-06-28 02:34:45,546 INFO L125 PetriNetUnfolderBase]: For 2183/2183 co-relation queries the response was YES. [2024-06-28 02:34:45,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 1270 events. 763/1270 cut-off events. For 2183/2183 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6270 event pairs, 266 based on Foata normal form. 2/1270 useless extension candidates. Maximal degree in co-relation 4209. Up to 1125 conditions per place. [2024-06-28 02:34:45,555 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 59 selfloop transitions, 14 changer transitions 0/81 dead transitions. [2024-06-28 02:34:45,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 557 flow [2024-06-28 02:34:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:34:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:34:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-28 02:34:45,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 02:34:45,557 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 308 flow. Second operand 5 states and 130 transitions. [2024-06-28 02:34:45,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 557 flow [2024-06-28 02:34:45,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 517 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 02:34:45,560 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 358 flow [2024-06-28 02:34:45,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=358, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2024-06-28 02:34:45,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-28 02:34:45,561 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 358 flow [2024-06-28 02:34:45,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 02:34:45,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:45,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:45,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:34:45,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:45,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2115271477, now seen corresponding path program 2 times [2024-06-28 02:34:45,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:45,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164888130] [2024-06-28 02:34:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:45,660 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 02:34:45,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:45,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164888130] [2024-06-28 02:34:45,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164888130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:45,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:45,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:34:45,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045476854] [2024-06-28 02:34:45,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:45,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:34:45,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:45,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:34:45,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:34:45,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:45,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 358 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 02:34:45,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:45,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:45,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:45,799 INFO L124 PetriNetUnfolderBase]: 758/1261 cut-off events. [2024-06-28 02:34:45,800 INFO L125 PetriNetUnfolderBase]: For 2825/2825 co-relation queries the response was YES. [2024-06-28 02:34:45,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4445 conditions, 1261 events. 758/1261 cut-off events. For 2825/2825 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6199 event pairs, 269 based on Foata normal form. 2/1261 useless extension candidates. Maximal degree in co-relation 4420. Up to 1120 conditions per place. [2024-06-28 02:34:45,808 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 54 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2024-06-28 02:34:45,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 541 flow [2024-06-28 02:34:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:34:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:34:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-28 02:34:45,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:34:45,809 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 358 flow. Second operand 5 states and 125 transitions. [2024-06-28 02:34:45,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 541 flow [2024-06-28 02:34:45,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 515 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-28 02:34:45,815 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 377 flow [2024-06-28 02:34:45,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-28 02:34:45,818 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-28 02:34:45,818 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 377 flow [2024-06-28 02:34:45,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 02:34:45,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:45,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:45,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:34:45,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:45,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:45,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1120634697, now seen corresponding path program 1 times [2024-06-28 02:34:45,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:45,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433135893] [2024-06-28 02:34:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:45,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:45,936 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 02:34:45,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:45,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433135893] [2024-06-28 02:34:45,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433135893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:45,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:45,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:34:45,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326226415] [2024-06-28 02:34:45,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:45,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:34:45,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:34:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:34:45,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:45,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 02:34:45,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:45,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:45,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:46,083 INFO L124 PetriNetUnfolderBase]: 750/1254 cut-off events. [2024-06-28 02:34:46,084 INFO L125 PetriNetUnfolderBase]: For 3254/3254 co-relation queries the response was YES. [2024-06-28 02:34:46,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4472 conditions, 1254 events. 750/1254 cut-off events. For 3254/3254 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6144 event pairs, 246 based on Foata normal form. 4/1257 useless extension candidates. Maximal degree in co-relation 4446. Up to 1123 conditions per place. [2024-06-28 02:34:46,092 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 63 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2024-06-28 02:34:46,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 573 flow [2024-06-28 02:34:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:34:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:34:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 02:34:46,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-28 02:34:46,094 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 377 flow. Second operand 5 states and 123 transitions. [2024-06-28 02:34:46,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 573 flow [2024-06-28 02:34:46,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 551 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 02:34:46,098 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 396 flow [2024-06-28 02:34:46,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-28 02:34:46,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-28 02:34:46,099 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 396 flow [2024-06-28 02:34:46,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 02:34:46,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:46,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:46,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:34:46,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:46,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1063530184, now seen corresponding path program 1 times [2024-06-28 02:34:46,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:46,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346773844] [2024-06-28 02:34:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:46,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:46,207 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 02:34:46,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:46,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346773844] [2024-06-28 02:34:46,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346773844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:46,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:46,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607172828] [2024-06-28 02:34:46,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:46,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:46,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:46,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:46,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:46,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:46,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:46,395 INFO L124 PetriNetUnfolderBase]: 773/1297 cut-off events. [2024-06-28 02:34:46,396 INFO L125 PetriNetUnfolderBase]: For 4190/4190 co-relation queries the response was YES. [2024-06-28 02:34:46,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4770 conditions, 1297 events. 773/1297 cut-off events. For 4190/4190 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6526 event pairs, 216 based on Foata normal form. 4/1298 useless extension candidates. Maximal degree in co-relation 4742. Up to 1101 conditions per place. [2024-06-28 02:34:46,404 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 65 selfloop transitions, 24 changer transitions 0/97 dead transitions. [2024-06-28 02:34:46,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 694 flow [2024-06-28 02:34:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:46,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-28 02:34:46,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-28 02:34:46,407 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 396 flow. Second operand 6 states and 162 transitions. [2024-06-28 02:34:46,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 694 flow [2024-06-28 02:34:46,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 671 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 02:34:46,415 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 469 flow [2024-06-28 02:34:46,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-28 02:34:46,417 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-28 02:34:46,417 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 469 flow [2024-06-28 02:34:46,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:46,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:46,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:46,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:34:46,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:46,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1068291784, now seen corresponding path program 2 times [2024-06-28 02:34:46,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:46,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404540307] [2024-06-28 02:34:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:46,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:46,525 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 02:34:46,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:46,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404540307] [2024-06-28 02:34:46,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404540307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:46,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:46,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:46,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734643329] [2024-06-28 02:34:46,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:46,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:46,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:46,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:46,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:46,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:46,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:46,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:46,677 INFO L124 PetriNetUnfolderBase]: 784/1325 cut-off events. [2024-06-28 02:34:46,677 INFO L125 PetriNetUnfolderBase]: For 4939/4939 co-relation queries the response was YES. [2024-06-28 02:34:46,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 1325 events. 784/1325 cut-off events. For 4939/4939 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6680 event pairs, 243 based on Foata normal form. 2/1325 useless extension candidates. Maximal degree in co-relation 5288. Up to 1113 conditions per place. [2024-06-28 02:34:46,687 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 71 selfloop transitions, 24 changer transitions 0/103 dead transitions. [2024-06-28 02:34:46,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 103 transitions, 828 flow [2024-06-28 02:34:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-28 02:34:46,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-28 02:34:46,688 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 469 flow. Second operand 6 states and 154 transitions. [2024-06-28 02:34:46,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 103 transitions, 828 flow [2024-06-28 02:34:46,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 103 transitions, 757 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:34:46,694 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 564 flow [2024-06-28 02:34:46,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=564, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-28 02:34:46,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-28 02:34:46,695 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 564 flow [2024-06-28 02:34:46,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:46,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:46,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:46,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:34:46,696 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:46,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:46,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1068298728, now seen corresponding path program 1 times [2024-06-28 02:34:46,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:46,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308662632] [2024-06-28 02:34:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:46,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:46,776 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 02:34:46,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:46,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308662632] [2024-06-28 02:34:46,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308662632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:46,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:46,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:46,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430348045] [2024-06-28 02:34:46,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:46,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:46,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:46,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:46,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:46,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:46,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 564 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:46,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:46,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:46,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:46,935 INFO L124 PetriNetUnfolderBase]: 801/1350 cut-off events. [2024-06-28 02:34:46,935 INFO L125 PetriNetUnfolderBase]: For 6350/6350 co-relation queries the response was YES. [2024-06-28 02:34:46,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5728 conditions, 1350 events. 801/1350 cut-off events. For 6350/6350 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6767 event pairs, 239 based on Foata normal form. 4/1352 useless extension candidates. Maximal degree in co-relation 5696. Up to 1166 conditions per place. [2024-06-28 02:34:46,944 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 79 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-28 02:34:46,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 830 flow [2024-06-28 02:34:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 02:34:46,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:34:46,946 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 564 flow. Second operand 6 states and 150 transitions. [2024-06-28 02:34:46,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 830 flow [2024-06-28 02:34:46,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 104 transitions, 808 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 02:34:46,953 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 603 flow [2024-06-28 02:34:46,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=603, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-06-28 02:34:46,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-28 02:34:46,954 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 603 flow [2024-06-28 02:34:46,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:46,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:46,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:46,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:34:46,955 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:46,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1256317270, now seen corresponding path program 3 times [2024-06-28 02:34:46,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:46,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784985749] [2024-06-28 02:34:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:46,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:47,022 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 02:34:47,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:47,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784985749] [2024-06-28 02:34:47,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784985749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:47,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:47,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:47,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299701239] [2024-06-28 02:34:47,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:47,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:47,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:47,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:47,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:47,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 603 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:47,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:47,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:47,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:47,179 INFO L124 PetriNetUnfolderBase]: 796/1336 cut-off events. [2024-06-28 02:34:47,179 INFO L125 PetriNetUnfolderBase]: For 7305/7305 co-relation queries the response was YES. [2024-06-28 02:34:47,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5914 conditions, 1336 events. 796/1336 cut-off events. For 7305/7305 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6673 event pairs, 251 based on Foata normal form. 2/1335 useless extension candidates. Maximal degree in co-relation 5880. Up to 1135 conditions per place. [2024-06-28 02:34:47,188 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 68 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-28 02:34:47,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 848 flow [2024-06-28 02:34:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-28 02:34:47,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-28 02:34:47,190 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 603 flow. Second operand 6 states and 149 transitions. [2024-06-28 02:34:47,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 848 flow [2024-06-28 02:34:47,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 791 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 02:34:47,197 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 615 flow [2024-06-28 02:34:47,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=615, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-28 02:34:47,198 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-28 02:34:47,198 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 615 flow [2024-06-28 02:34:47,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:47,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:47,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:47,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:34:47,199 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:47,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:47,199 INFO L85 PathProgramCache]: Analyzing trace with hash 4905016, now seen corresponding path program 2 times [2024-06-28 02:34:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:47,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56703544] [2024-06-28 02:34:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:47,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:47,273 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 02:34:47,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:47,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56703544] [2024-06-28 02:34:47,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56703544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:47,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:47,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:47,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201088252] [2024-06-28 02:34:47,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:47,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:47,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:47,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:47,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 615 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:47,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:47,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:47,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:47,449 INFO L124 PetriNetUnfolderBase]: 813/1378 cut-off events. [2024-06-28 02:34:47,449 INFO L125 PetriNetUnfolderBase]: For 8392/8392 co-relation queries the response was YES. [2024-06-28 02:34:47,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6112 conditions, 1378 events. 813/1378 cut-off events. For 8392/8392 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6960 event pairs, 249 based on Foata normal form. 4/1380 useless extension candidates. Maximal degree in co-relation 6077. Up to 1186 conditions per place. [2024-06-28 02:34:47,457 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 79 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-28 02:34:47,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 877 flow [2024-06-28 02:34:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-28 02:34:47,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-28 02:34:47,459 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 615 flow. Second operand 6 states and 147 transitions. [2024-06-28 02:34:47,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 877 flow [2024-06-28 02:34:47,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 104 transitions, 833 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 02:34:47,466 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 636 flow [2024-06-28 02:34:47,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=636, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-06-28 02:34:47,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-28 02:34:47,467 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 636 flow [2024-06-28 02:34:47,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:47,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:47,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:47,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:34:47,468 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:47,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash 5144026, now seen corresponding path program 3 times [2024-06-28 02:34:47,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:47,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780381221] [2024-06-28 02:34:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:47,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:47,538 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 02:34:47,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780381221] [2024-06-28 02:34:47,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780381221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:47,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:47,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:47,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484145263] [2024-06-28 02:34:47,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:47,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:47,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:47,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:47,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:47,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:47,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 636 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:47,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:47,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:47,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:47,708 INFO L124 PetriNetUnfolderBase]: 805/1366 cut-off events. [2024-06-28 02:34:47,708 INFO L125 PetriNetUnfolderBase]: For 9531/9531 co-relation queries the response was YES. [2024-06-28 02:34:47,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6185 conditions, 1366 events. 805/1366 cut-off events. For 9531/9531 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6924 event pairs, 218 based on Foata normal form. 4/1368 useless extension candidates. Maximal degree in co-relation 6148. Up to 1115 conditions per place. [2024-06-28 02:34:47,717 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 77 selfloop transitions, 22 changer transitions 0/107 dead transitions. [2024-06-28 02:34:47,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 107 transitions, 910 flow [2024-06-28 02:34:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:34:47,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-28 02:34:47,719 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 636 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:34:47,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 107 transitions, 910 flow [2024-06-28 02:34:47,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 107 transitions, 863 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 02:34:47,729 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 668 flow [2024-06-28 02:34:47,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=668, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-06-28 02:34:47,729 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-28 02:34:47,729 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 668 flow [2024-06-28 02:34:47,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:34:47,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:47,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:47,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:34:47,730 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:47,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:47,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1834330822, now seen corresponding path program 1 times [2024-06-28 02:34:47,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:47,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191919210] [2024-06-28 02:34:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:47,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:47,797 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 02:34:47,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:47,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191919210] [2024-06-28 02:34:47,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191919210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:47,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:47,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:34:47,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031286341] [2024-06-28 02:34:47,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:47,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:34:47,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:34:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:34:47,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-28 02:34:47,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 668 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 02:34:47,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:47,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-28 02:34:47,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:47,924 INFO L124 PetriNetUnfolderBase]: 727/1257 cut-off events. [2024-06-28 02:34:47,924 INFO L125 PetriNetUnfolderBase]: For 9946/9951 co-relation queries the response was YES. [2024-06-28 02:34:47,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5784 conditions, 1257 events. 727/1257 cut-off events. For 9946/9951 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6407 event pairs, 246 based on Foata normal form. 8/1261 useless extension candidates. Maximal degree in co-relation 5746. Up to 1045 conditions per place. [2024-06-28 02:34:47,933 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 60 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-28 02:34:47,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 94 transitions, 844 flow [2024-06-28 02:34:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:34:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:34:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-28 02:34:47,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 02:34:47,935 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 668 flow. Second operand 4 states and 104 transitions. [2024-06-28 02:34:47,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 94 transitions, 844 flow [2024-06-28 02:34:47,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 94 transitions, 783 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 02:34:47,945 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 652 flow [2024-06-28 02:34:47,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=652, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-06-28 02:34:47,946 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-28 02:34:47,946 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 652 flow [2024-06-28 02:34:47,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 02:34:47,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:47,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:47,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:34:47,947 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:47,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1034448361, now seen corresponding path program 1 times [2024-06-28 02:34:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:47,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300035167] [2024-06-28 02:34:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:47,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:48,011 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 02:34:48,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:48,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300035167] [2024-06-28 02:34:48,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300035167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:48,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:48,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:34:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304842240] [2024-06-28 02:34:48,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:48,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:34:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:34:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:34:48,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:48,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 652 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 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 02:34:48,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:48,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:48,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:48,165 INFO L124 PetriNetUnfolderBase]: 785/1330 cut-off events. [2024-06-28 02:34:48,166 INFO L125 PetriNetUnfolderBase]: For 10738/10738 co-relation queries the response was YES. [2024-06-28 02:34:48,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6193 conditions, 1330 events. 785/1330 cut-off events. For 10738/10738 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6634 event pairs, 235 based on Foata normal form. 1/1330 useless extension candidates. Maximal degree in co-relation 6154. Up to 1183 conditions per place. [2024-06-28 02:34:48,174 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 82 selfloop transitions, 15 changer transitions 0/105 dead transitions. [2024-06-28 02:34:48,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 105 transitions, 966 flow [2024-06-28 02:34:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:34:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:34:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-28 02:34:48,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-28 02:34:48,175 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 652 flow. Second operand 5 states and 122 transitions. [2024-06-28 02:34:48,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 105 transitions, 966 flow [2024-06-28 02:34:48,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 105 transitions, 922 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 02:34:48,187 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 710 flow [2024-06-28 02:34:48,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=710, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-06-28 02:34:48,188 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-28 02:34:48,188 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 710 flow [2024-06-28 02:34:48,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 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 02:34:48,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:48,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:48,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:34:48,189 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:48,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash -428206471, now seen corresponding path program 2 times [2024-06-28 02:34:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:48,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383307310] [2024-06-28 02:34:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:48,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:48,259 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 02:34:48,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:48,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383307310] [2024-06-28 02:34:48,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383307310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:48,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:48,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:34:48,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990688304] [2024-06-28 02:34:48,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:48,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:34:48,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:34:48,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:34:48,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:48,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 710 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 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 02:34:48,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:48,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:48,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:48,441 INFO L124 PetriNetUnfolderBase]: 782/1326 cut-off events. [2024-06-28 02:34:48,442 INFO L125 PetriNetUnfolderBase]: For 11978/11978 co-relation queries the response was YES. [2024-06-28 02:34:48,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6370 conditions, 1326 events. 782/1326 cut-off events. For 11978/11978 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6611 event pairs, 235 based on Foata normal form. 1/1326 useless extension candidates. Maximal degree in co-relation 6331. Up to 1183 conditions per place. [2024-06-28 02:34:48,449 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 83 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2024-06-28 02:34:48,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 928 flow [2024-06-28 02:34:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:34:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:34:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-28 02:34:48,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-28 02:34:48,451 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 710 flow. Second operand 4 states and 102 transitions. [2024-06-28 02:34:48,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 928 flow [2024-06-28 02:34:48,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 882 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-28 02:34:48,463 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 698 flow [2024-06-28 02:34:48,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=698, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2024-06-28 02:34:48,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-28 02:34:48,464 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 698 flow [2024-06-28 02:34:48,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 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 02:34:48,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:48,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:48,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:34:48,465 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:48,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash -152523481, now seen corresponding path program 1 times [2024-06-28 02:34:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:48,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54394317] [2024-06-28 02:34:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:48,551 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 02:34:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:48,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54394317] [2024-06-28 02:34:48,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54394317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:48,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:48,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:48,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569182112] [2024-06-28 02:34:48,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:48,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:48,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:48,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:48,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:48,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:48,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 698 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:48,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:48,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:48,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:48,913 INFO L124 PetriNetUnfolderBase]: 1178/1992 cut-off events. [2024-06-28 02:34:48,914 INFO L125 PetriNetUnfolderBase]: For 26474/26474 co-relation queries the response was YES. [2024-06-28 02:34:48,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9638 conditions, 1992 events. 1178/1992 cut-off events. For 26474/26474 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10890 event pairs, 279 based on Foata normal form. 42/2031 useless extension candidates. Maximal degree in co-relation 9597. Up to 1089 conditions per place. [2024-06-28 02:34:48,926 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 101 selfloop transitions, 33 changer transitions 4/146 dead transitions. [2024-06-28 02:34:48,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 146 transitions, 1262 flow [2024-06-28 02:34:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:34:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:34:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-28 02:34:48,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-06-28 02:34:48,928 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 698 flow. Second operand 8 states and 218 transitions. [2024-06-28 02:34:48,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 146 transitions, 1262 flow [2024-06-28 02:34:48,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 146 transitions, 1238 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:34:48,947 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 825 flow [2024-06-28 02:34:48,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=825, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-06-28 02:34:48,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-28 02:34:48,948 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 825 flow [2024-06-28 02:34:48,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:48,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:48,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:48,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:34:48,949 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:48,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:48,949 INFO L85 PathProgramCache]: Analyzing trace with hash -149666521, now seen corresponding path program 2 times [2024-06-28 02:34:48,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:48,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658046404] [2024-06-28 02:34:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:48,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:49,038 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 02:34:49,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:49,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658046404] [2024-06-28 02:34:49,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658046404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:49,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:49,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:49,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827453044] [2024-06-28 02:34:49,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:49,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:49,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:49,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:49,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:49,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:49,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 825 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:49,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:49,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:49,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:49,320 INFO L124 PetriNetUnfolderBase]: 1051/1787 cut-off events. [2024-06-28 02:34:49,320 INFO L125 PetriNetUnfolderBase]: For 24175/24175 co-relation queries the response was YES. [2024-06-28 02:34:49,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 1787 events. 1051/1787 cut-off events. For 24175/24175 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9575 event pairs, 332 based on Foata normal form. 50/1834 useless extension candidates. Maximal degree in co-relation 8526. Up to 1320 conditions per place. [2024-06-28 02:34:49,332 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 95 selfloop transitions, 28 changer transitions 3/134 dead transitions. [2024-06-28 02:34:49,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 134 transitions, 1214 flow [2024-06-28 02:34:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-28 02:34:49,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-28 02:34:49,334 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 825 flow. Second operand 7 states and 187 transitions. [2024-06-28 02:34:49,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 134 transitions, 1214 flow [2024-06-28 02:34:49,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1144 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 02:34:49,358 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 836 flow [2024-06-28 02:34:49,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=836, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2024-06-28 02:34:49,359 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-28 02:34:49,359 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 836 flow [2024-06-28 02:34:49,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:49,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:49,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:49,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:34:49,359 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:49,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash -34375351, now seen corresponding path program 3 times [2024-06-28 02:34:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:49,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737726325] [2024-06-28 02:34:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:49,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:49,444 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 02:34:49,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:49,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737726325] [2024-06-28 02:34:49,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737726325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:49,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:49,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:49,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709032822] [2024-06-28 02:34:49,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:49,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:49,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:49,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:49,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:49,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:49,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 836 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:49,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:49,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:49,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:49,681 INFO L124 PetriNetUnfolderBase]: 1099/1880 cut-off events. [2024-06-28 02:34:49,682 INFO L125 PetriNetUnfolderBase]: For 20984/20984 co-relation queries the response was YES. [2024-06-28 02:34:49,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8961 conditions, 1880 events. 1099/1880 cut-off events. For 20984/20984 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10210 event pairs, 349 based on Foata normal form. 16/1894 useless extension candidates. Maximal degree in co-relation 8916. Up to 1561 conditions per place. [2024-06-28 02:34:49,695 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 94 selfloop transitions, 26 changer transitions 0/128 dead transitions. [2024-06-28 02:34:49,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 128 transitions, 1184 flow [2024-06-28 02:34:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 02:34:49,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-28 02:34:49,697 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 836 flow. Second operand 7 states and 176 transitions. [2024-06-28 02:34:49,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 128 transitions, 1184 flow [2024-06-28 02:34:49,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1132 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 02:34:49,722 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 863 flow [2024-06-28 02:34:49,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=863, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2024-06-28 02:34:49,723 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-28 02:34:49,723 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 863 flow [2024-06-28 02:34:49,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:49,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:49,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:49,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:34:49,723 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:49,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:49,724 INFO L85 PathProgramCache]: Analyzing trace with hash 137934983, now seen corresponding path program 1 times [2024-06-28 02:34:49,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:49,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458446887] [2024-06-28 02:34:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:49,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:49,803 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 02:34:49,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:49,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458446887] [2024-06-28 02:34:49,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458446887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:49,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:49,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:49,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3357675] [2024-06-28 02:34:49,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:49,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:49,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:49,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:49,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:49,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 863 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:49,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:49,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:49,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:50,060 INFO L124 PetriNetUnfolderBase]: 1140/1961 cut-off events. [2024-06-28 02:34:50,061 INFO L125 PetriNetUnfolderBase]: For 22870/22870 co-relation queries the response was YES. [2024-06-28 02:34:50,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9373 conditions, 1961 events. 1140/1961 cut-off events. For 22870/22870 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10862 event pairs, 345 based on Foata normal form. 12/1971 useless extension candidates. Maximal degree in co-relation 9327. Up to 1453 conditions per place. [2024-06-28 02:34:50,074 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 29 changer transitions 0/132 dead transitions. [2024-06-28 02:34:50,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 132 transitions, 1233 flow [2024-06-28 02:34:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 02:34:50,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-28 02:34:50,076 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 863 flow. Second operand 7 states and 178 transitions. [2024-06-28 02:34:50,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 132 transitions, 1233 flow [2024-06-28 02:34:50,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 132 transitions, 1174 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 02:34:50,102 INFO L231 Difference]: Finished difference. Result has 102 places, 99 transitions, 890 flow [2024-06-28 02:34:50,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=890, PETRI_PLACES=102, PETRI_TRANSITIONS=99} [2024-06-28 02:34:50,102 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-28 02:34:50,102 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 99 transitions, 890 flow [2024-06-28 02:34:50,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:50,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:50,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:50,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:34:50,103 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:50,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:50,103 INFO L85 PathProgramCache]: Analyzing trace with hash -545647347, now seen corresponding path program 4 times [2024-06-28 02:34:50,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:50,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654975030] [2024-06-28 02:34:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:50,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:50,182 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 02:34:50,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:50,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654975030] [2024-06-28 02:34:50,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654975030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:50,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:50,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:50,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841099636] [2024-06-28 02:34:50,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:50,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:50,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:50,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:50,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:50,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:50,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 99 transitions, 890 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:50,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:50,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:50,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:50,423 INFO L124 PetriNetUnfolderBase]: 1173/2013 cut-off events. [2024-06-28 02:34:50,424 INFO L125 PetriNetUnfolderBase]: For 25262/25262 co-relation queries the response was YES. [2024-06-28 02:34:50,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9623 conditions, 2013 events. 1173/2013 cut-off events. For 25262/25262 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11244 event pairs, 382 based on Foata normal form. 16/2026 useless extension candidates. Maximal degree in co-relation 9576. Up to 1691 conditions per place. [2024-06-28 02:34:50,438 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 93 selfloop transitions, 26 changer transitions 0/127 dead transitions. [2024-06-28 02:34:50,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 127 transitions, 1232 flow [2024-06-28 02:34:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:34:50,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-28 02:34:50,439 INFO L175 Difference]: Start difference. First operand has 102 places, 99 transitions, 890 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:34:50,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 127 transitions, 1232 flow [2024-06-28 02:34:50,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 127 transitions, 1171 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 02:34:50,467 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 912 flow [2024-06-28 02:34:50,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2024-06-28 02:34:50,468 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-28 02:34:50,468 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 912 flow [2024-06-28 02:34:50,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:50,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:50,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:50,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:34:50,468 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:50,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash 418794199, now seen corresponding path program 2 times [2024-06-28 02:34:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:50,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678678467] [2024-06-28 02:34:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:50,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:50,567 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 02:34:50,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678678467] [2024-06-28 02:34:50,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678678467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:50,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:50,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:50,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117952287] [2024-06-28 02:34:50,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:50,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:50,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:50,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:50,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:50,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 912 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:50,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:50,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:50,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:50,849 INFO L124 PetriNetUnfolderBase]: 1214/2094 cut-off events. [2024-06-28 02:34:50,849 INFO L125 PetriNetUnfolderBase]: For 26794/26794 co-relation queries the response was YES. [2024-06-28 02:34:50,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9978 conditions, 2094 events. 1214/2094 cut-off events. For 26794/26794 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11814 event pairs, 382 based on Foata normal form. 12/2103 useless extension candidates. Maximal degree in co-relation 9930. Up to 1675 conditions per place. [2024-06-28 02:34:50,861 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 28 changer transitions 0/131 dead transitions. [2024-06-28 02:34:50,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 131 transitions, 1276 flow [2024-06-28 02:34:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 02:34:50,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-28 02:34:50,864 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 912 flow. Second operand 7 states and 176 transitions. [2024-06-28 02:34:50,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 131 transitions, 1276 flow [2024-06-28 02:34:50,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 131 transitions, 1213 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 02:34:50,891 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 937 flow [2024-06-28 02:34:50,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=937, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2024-06-28 02:34:50,891 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-28 02:34:50,891 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 937 flow [2024-06-28 02:34:50,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:50,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:50,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:50,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:34:50,892 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:50,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:50,893 INFO L85 PathProgramCache]: Analyzing trace with hash 984385245, now seen corresponding path program 3 times [2024-06-28 02:34:50,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:50,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572806263] [2024-06-28 02:34:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:50,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:50,969 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 02:34:50,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:50,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572806263] [2024-06-28 02:34:50,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572806263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:50,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:50,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:50,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866320445] [2024-06-28 02:34:50,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:50,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:50,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:50,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:51,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:51,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 937 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:51,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:51,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:51,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:51,236 INFO L124 PetriNetUnfolderBase]: 1194/2062 cut-off events. [2024-06-28 02:34:51,236 INFO L125 PetriNetUnfolderBase]: For 25740/25740 co-relation queries the response was YES. [2024-06-28 02:34:51,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9617 conditions, 2062 events. 1194/2062 cut-off events. For 25740/25740 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11654 event pairs, 327 based on Foata normal form. 12/2071 useless extension candidates. Maximal degree in co-relation 9568. Up to 1262 conditions per place. [2024-06-28 02:34:51,250 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 88 selfloop transitions, 35 changer transitions 0/131 dead transitions. [2024-06-28 02:34:51,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 131 transitions, 1239 flow [2024-06-28 02:34:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:34:51,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:34:51,252 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 937 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:34:51,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 131 transitions, 1239 flow [2024-06-28 02:34:51,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 131 transitions, 1167 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 02:34:51,314 INFO L231 Difference]: Finished difference. Result has 108 places, 100 transitions, 899 flow [2024-06-28 02:34:51,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=899, PETRI_PLACES=108, PETRI_TRANSITIONS=100} [2024-06-28 02:34:51,315 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-28 02:34:51,315 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 100 transitions, 899 flow [2024-06-28 02:34:51,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:51,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:51,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:51,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:34:51,316 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:51,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash -561238237, now seen corresponding path program 1 times [2024-06-28 02:34:51,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:51,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586148729] [2024-06-28 02:34:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:51,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:51,413 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 02:34:51,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:51,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586148729] [2024-06-28 02:34:51,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586148729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:51,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:51,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:51,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416488189] [2024-06-28 02:34:51,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:51,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:51,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:51,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:51,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:51,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 100 transitions, 899 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:51,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:51,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:51,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:51,616 INFO L124 PetriNetUnfolderBase]: 1222/2115 cut-off events. [2024-06-28 02:34:51,616 INFO L125 PetriNetUnfolderBase]: For 25631/25631 co-relation queries the response was YES. [2024-06-28 02:34:51,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9958 conditions, 2115 events. 1222/2115 cut-off events. For 25631/25631 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11977 event pairs, 378 based on Foata normal form. 2/2115 useless extension candidates. Maximal degree in co-relation 9908. Up to 1837 conditions per place. [2024-06-28 02:34:51,631 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 90 selfloop transitions, 33 changer transitions 0/131 dead transitions. [2024-06-28 02:34:51,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 131 transitions, 1441 flow [2024-06-28 02:34:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:34:51,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-28 02:34:51,632 INFO L175 Difference]: Start difference. First operand has 108 places, 100 transitions, 899 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:34:51,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 131 transitions, 1441 flow [2024-06-28 02:34:51,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 131 transitions, 1353 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 02:34:51,666 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 1062 flow [2024-06-28 02:34:51,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1062, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2024-06-28 02:34:51,666 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-28 02:34:51,666 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 1062 flow [2024-06-28 02:34:51,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:51,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:51,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:51,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:34:51,667 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:51,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:51,668 INFO L85 PathProgramCache]: Analyzing trace with hash -389497927, now seen corresponding path program 2 times [2024-06-28 02:34:51,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:51,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419618278] [2024-06-28 02:34:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:51,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:51,737 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 02:34:51,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:51,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419618278] [2024-06-28 02:34:51,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419618278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:51,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:51,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:51,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876738616] [2024-06-28 02:34:51,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:51,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:51,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:51,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:51,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:51,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 1062 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:51,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:51,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:51,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:52,000 INFO L124 PetriNetUnfolderBase]: 1247/2154 cut-off events. [2024-06-28 02:34:52,000 INFO L125 PetriNetUnfolderBase]: For 28181/28181 co-relation queries the response was YES. [2024-06-28 02:34:52,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10477 conditions, 2154 events. 1247/2154 cut-off events. For 28181/28181 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12255 event pairs, 389 based on Foata normal form. 3/2154 useless extension candidates. Maximal degree in co-relation 10424. Up to 1840 conditions per place. [2024-06-28 02:34:52,020 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 86 selfloop transitions, 45 changer transitions 0/139 dead transitions. [2024-06-28 02:34:52,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 139 transitions, 1544 flow [2024-06-28 02:34:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:34:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:34:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-28 02:34:52,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-28 02:34:52,022 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 1062 flow. Second operand 5 states and 129 transitions. [2024-06-28 02:34:52,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 139 transitions, 1544 flow [2024-06-28 02:34:52,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 139 transitions, 1482 flow, removed 31 selfloop flow, removed 0 redundant places. [2024-06-28 02:34:52,069 INFO L231 Difference]: Finished difference. Result has 117 places, 125 transitions, 1270 flow [2024-06-28 02:34:52,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1270, PETRI_PLACES=117, PETRI_TRANSITIONS=125} [2024-06-28 02:34:52,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-28 02:34:52,070 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 125 transitions, 1270 flow [2024-06-28 02:34:52,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:52,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:52,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:52,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:34:52,071 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:52,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:52,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2142234227, now seen corresponding path program 3 times [2024-06-28 02:34:52,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:52,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252982828] [2024-06-28 02:34:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:52,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:52,149 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 02:34:52,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:52,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252982828] [2024-06-28 02:34:52,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252982828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:52,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:52,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:52,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111705470] [2024-06-28 02:34:52,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:52,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:52,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:52,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:52,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:52,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 125 transitions, 1270 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:52,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:52,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:52,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:52,399 INFO L124 PetriNetUnfolderBase]: 1246/2155 cut-off events. [2024-06-28 02:34:52,399 INFO L125 PetriNetUnfolderBase]: For 31338/31338 co-relation queries the response was YES. [2024-06-28 02:34:52,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11022 conditions, 2155 events. 1246/2155 cut-off events. For 31338/31338 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12269 event pairs, 386 based on Foata normal form. 3/2155 useless extension candidates. Maximal degree in co-relation 10965. Up to 1841 conditions per place. [2024-06-28 02:34:52,415 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 83 selfloop transitions, 53 changer transitions 0/144 dead transitions. [2024-06-28 02:34:52,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 144 transitions, 1685 flow [2024-06-28 02:34:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:34:52,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-28 02:34:52,417 INFO L175 Difference]: Start difference. First operand has 117 places, 125 transitions, 1270 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:34:52,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 144 transitions, 1685 flow [2024-06-28 02:34:52,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 144 transitions, 1612 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-06-28 02:34:52,461 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 1373 flow [2024-06-28 02:34:52,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1373, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-06-28 02:34:52,462 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-28 02:34:52,462 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 1373 flow [2024-06-28 02:34:52,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:52,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:52,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:34:52,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:34:52,464 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:52,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:52,464 INFO L85 PathProgramCache]: Analyzing trace with hash -389282601, now seen corresponding path program 1 times [2024-06-28 02:34:52,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:52,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483814168] [2024-06-28 02:34:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:52,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:52,558 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 02:34:52,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:52,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483814168] [2024-06-28 02:34:52,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483814168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:52,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:52,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:52,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853081567] [2024-06-28 02:34:52,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:52,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:52,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:52,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:52,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:52,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-28 02:34:52,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 1373 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:52,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:52,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-28 02:34:52,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:52,835 INFO L124 PetriNetUnfolderBase]: 1196/2095 cut-off events. [2024-06-28 02:34:52,836 INFO L125 PetriNetUnfolderBase]: For 36022/36027 co-relation queries the response was YES. [2024-06-28 02:34:52,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10905 conditions, 2095 events. 1196/2095 cut-off events. For 36022/36027 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12137 event pairs, 367 based on Foata normal form. 17/2090 useless extension candidates. Maximal degree in co-relation 10846. Up to 1768 conditions per place. [2024-06-28 02:34:52,850 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 101 selfloop transitions, 21 changer transitions 0/144 dead transitions. [2024-06-28 02:34:52,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 144 transitions, 1689 flow [2024-06-28 02:34:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:34:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:34:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-28 02:34:52,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-28 02:34:52,851 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 1373 flow. Second operand 5 states and 126 transitions. [2024-06-28 02:34:52,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 144 transitions, 1689 flow [2024-06-28 02:34:52,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 144 transitions, 1535 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 02:34:52,893 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 1298 flow [2024-06-28 02:34:52,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1298, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2024-06-28 02:34:52,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-28 02:34:52,894 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 1298 flow [2024-06-28 02:34:52,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:52,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:52,894 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 02:34:52,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:34:52,894 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:52,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:52,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1907868594, now seen corresponding path program 1 times [2024-06-28 02:34:52,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:52,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833907764] [2024-06-28 02:34:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:52,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:52,957 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 02:34:52,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:52,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833907764] [2024-06-28 02:34:52,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833907764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:52,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:52,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828824526] [2024-06-28 02:34:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:52,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:52,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:52,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:52,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 1298 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:52,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:52,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:52,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:53,241 INFO L124 PetriNetUnfolderBase]: 1298/2245 cut-off events. [2024-06-28 02:34:53,242 INFO L125 PetriNetUnfolderBase]: For 34833/34833 co-relation queries the response was YES. [2024-06-28 02:34:53,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11677 conditions, 2245 events. 1298/2245 cut-off events. For 34833/34833 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12832 event pairs, 388 based on Foata normal form. 1/2241 useless extension candidates. Maximal degree in co-relation 11617. Up to 1936 conditions per place. [2024-06-28 02:34:53,255 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 101 selfloop transitions, 50 changer transitions 0/159 dead transitions. [2024-06-28 02:34:53,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 159 transitions, 1857 flow [2024-06-28 02:34:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-28 02:34:53,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-28 02:34:53,258 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 1298 flow. Second operand 6 states and 154 transitions. [2024-06-28 02:34:53,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 159 transitions, 1857 flow [2024-06-28 02:34:53,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 159 transitions, 1800 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 02:34:53,301 INFO L231 Difference]: Finished difference. Result has 126 places, 138 transitions, 1444 flow [2024-06-28 02:34:53,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=126, PETRI_TRANSITIONS=138} [2024-06-28 02:34:53,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-28 02:34:53,302 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 138 transitions, 1444 flow [2024-06-28 02:34:53,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:53,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:53,302 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 02:34:53,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:34:53,303 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:53,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:53,303 INFO L85 PathProgramCache]: Analyzing trace with hash 209593462, now seen corresponding path program 2 times [2024-06-28 02:34:53,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:53,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835514067] [2024-06-28 02:34:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:53,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:53,385 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 02:34:53,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:53,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835514067] [2024-06-28 02:34:53,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835514067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:53,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:53,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:53,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488768062] [2024-06-28 02:34:53,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:53,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:53,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:53,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:53,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:53,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:53,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 138 transitions, 1444 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:53,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:53,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:53,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:53,683 INFO L124 PetriNetUnfolderBase]: 1318/2285 cut-off events. [2024-06-28 02:34:53,683 INFO L125 PetriNetUnfolderBase]: For 36910/36910 co-relation queries the response was YES. [2024-06-28 02:34:53,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11996 conditions, 2285 events. 1318/2285 cut-off events. For 36910/36910 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13130 event pairs, 377 based on Foata normal form. 1/2283 useless extension candidates. Maximal degree in co-relation 11935. Up to 2011 conditions per place. [2024-06-28 02:34:53,699 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 125 selfloop transitions, 33 changer transitions 0/166 dead transitions. [2024-06-28 02:34:53,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 166 transitions, 1959 flow [2024-06-28 02:34:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-28 02:34:53,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-28 02:34:53,702 INFO L175 Difference]: Start difference. First operand has 126 places, 138 transitions, 1444 flow. Second operand 6 states and 149 transitions. [2024-06-28 02:34:53,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 166 transitions, 1959 flow [2024-06-28 02:34:53,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 166 transitions, 1867 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-28 02:34:53,759 INFO L231 Difference]: Finished difference. Result has 130 places, 149 transitions, 1589 flow [2024-06-28 02:34:53,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1589, PETRI_PLACES=130, PETRI_TRANSITIONS=149} [2024-06-28 02:34:53,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-28 02:34:53,760 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 149 transitions, 1589 flow [2024-06-28 02:34:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:53,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:53,761 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 02:34:53,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:34:53,761 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:53,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:53,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1978846090, now seen corresponding path program 3 times [2024-06-28 02:34:53,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389806200] [2024-06-28 02:34:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:53,821 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 02:34:53,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:53,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389806200] [2024-06-28 02:34:53,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389806200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:53,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:53,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:53,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039017842] [2024-06-28 02:34:53,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:53,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:53,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:53,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:53,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:53,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 149 transitions, 1589 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:53,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:53,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:53,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:54,070 INFO L124 PetriNetUnfolderBase]: 1323/2291 cut-off events. [2024-06-28 02:34:54,070 INFO L125 PetriNetUnfolderBase]: For 39428/39428 co-relation queries the response was YES. [2024-06-28 02:34:54,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12015 conditions, 2291 events. 1323/2291 cut-off events. For 39428/39428 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13159 event pairs, 386 based on Foata normal form. 1/2290 useless extension candidates. Maximal degree in co-relation 11953. Up to 1960 conditions per place. [2024-06-28 02:34:54,086 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 109 selfloop transitions, 53 changer transitions 0/170 dead transitions. [2024-06-28 02:34:54,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 170 transitions, 2111 flow [2024-06-28 02:34:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 02:34:54,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:34:54,088 INFO L175 Difference]: Start difference. First operand has 130 places, 149 transitions, 1589 flow. Second operand 6 states and 150 transitions. [2024-06-28 02:34:54,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 170 transitions, 2111 flow [2024-06-28 02:34:54,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 170 transitions, 2046 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-28 02:34:54,154 INFO L231 Difference]: Finished difference. Result has 134 places, 152 transitions, 1674 flow [2024-06-28 02:34:54,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1674, PETRI_PLACES=134, PETRI_TRANSITIONS=152} [2024-06-28 02:34:54,155 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-28 02:34:54,155 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 152 transitions, 1674 flow [2024-06-28 02:34:54,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:54,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:54,155 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 02:34:54,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:34:54,155 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:54,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash 377650042, now seen corresponding path program 4 times [2024-06-28 02:34:54,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:54,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772571301] [2024-06-28 02:34:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:54,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:54,226 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 02:34:54,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:54,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772571301] [2024-06-28 02:34:54,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772571301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:54,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:54,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:54,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723671740] [2024-06-28 02:34:54,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:54,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:54,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:54,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:54,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:54,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:54,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 152 transitions, 1674 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:54,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:54,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:54,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:54,490 INFO L124 PetriNetUnfolderBase]: 1315/2279 cut-off events. [2024-06-28 02:34:54,491 INFO L125 PetriNetUnfolderBase]: For 41446/41446 co-relation queries the response was YES. [2024-06-28 02:34:54,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12056 conditions, 2279 events. 1315/2279 cut-off events. For 41446/41446 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13134 event pairs, 386 based on Foata normal form. 2/2279 useless extension candidates. Maximal degree in co-relation 11993. Up to 1952 conditions per place. [2024-06-28 02:34:54,507 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 109 selfloop transitions, 49 changer transitions 0/166 dead transitions. [2024-06-28 02:34:54,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 166 transitions, 2084 flow [2024-06-28 02:34:54,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-28 02:34:54,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-28 02:34:54,509 INFO L175 Difference]: Start difference. First operand has 134 places, 152 transitions, 1674 flow. Second operand 6 states and 147 transitions. [2024-06-28 02:34:54,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 166 transitions, 2084 flow [2024-06-28 02:34:54,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 166 transitions, 1965 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 02:34:54,608 INFO L231 Difference]: Finished difference. Result has 137 places, 152 transitions, 1661 flow [2024-06-28 02:34:54,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1661, PETRI_PLACES=137, PETRI_TRANSITIONS=152} [2024-06-28 02:34:54,609 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-28 02:34:54,609 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 152 transitions, 1661 flow [2024-06-28 02:34:54,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:54,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:54,609 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 02:34:54,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:34:54,610 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:54,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 810453080, now seen corresponding path program 5 times [2024-06-28 02:34:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:54,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640973101] [2024-06-28 02:34:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:54,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:54,714 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 02:34:54,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:54,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640973101] [2024-06-28 02:34:54,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640973101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:54,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:54,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:54,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116698697] [2024-06-28 02:34:54,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:54,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:54,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:54,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:54,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:54,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:54,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 152 transitions, 1661 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:54,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:54,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:54,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:54,986 INFO L124 PetriNetUnfolderBase]: 1309/2266 cut-off events. [2024-06-28 02:34:54,986 INFO L125 PetriNetUnfolderBase]: For 42628/42628 co-relation queries the response was YES. [2024-06-28 02:34:54,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11967 conditions, 2266 events. 1309/2266 cut-off events. For 42628/42628 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13073 event pairs, 397 based on Foata normal form. 2/2265 useless extension candidates. Maximal degree in co-relation 11903. Up to 1913 conditions per place. [2024-06-28 02:34:55,001 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 59 changer transitions 0/168 dead transitions. [2024-06-28 02:34:55,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 168 transitions, 2083 flow [2024-06-28 02:34:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:34:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:34:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-28 02:34:55,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-28 02:34:55,003 INFO L175 Difference]: Start difference. First operand has 137 places, 152 transitions, 1661 flow. Second operand 5 states and 132 transitions. [2024-06-28 02:34:55,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 168 transitions, 2083 flow [2024-06-28 02:34:55,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 168 transitions, 1955 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 02:34:55,091 INFO L231 Difference]: Finished difference. Result has 137 places, 152 transitions, 1664 flow [2024-06-28 02:34:55,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1664, PETRI_PLACES=137, PETRI_TRANSITIONS=152} [2024-06-28 02:34:55,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-28 02:34:55,092 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 152 transitions, 1664 flow [2024-06-28 02:34:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:55,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:55,092 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 02:34:55,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:34:55,092 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:55,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1023355174, now seen corresponding path program 6 times [2024-06-28 02:34:55,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:55,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5395357] [2024-06-28 02:34:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:55,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:55,160 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 02:34:55,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:55,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5395357] [2024-06-28 02:34:55,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5395357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:55,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:55,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:55,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20504607] [2024-06-28 02:34:55,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:55,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:55,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:55,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:55,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 152 transitions, 1664 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:55,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:55,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:55,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:55,470 INFO L124 PetriNetUnfolderBase]: 1301/2262 cut-off events. [2024-06-28 02:34:55,470 INFO L125 PetriNetUnfolderBase]: For 43353/43353 co-relation queries the response was YES. [2024-06-28 02:34:55,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11914 conditions, 2262 events. 1301/2262 cut-off events. For 43353/43353 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13000 event pairs, 377 based on Foata normal form. 2/2261 useless extension candidates. Maximal degree in co-relation 11849. Up to 1905 conditions per place. [2024-06-28 02:34:55,486 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 100 selfloop transitions, 70 changer transitions 0/178 dead transitions. [2024-06-28 02:34:55,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 178 transitions, 2070 flow [2024-06-28 02:34:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:55,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-28 02:34:55,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-28 02:34:55,488 INFO L175 Difference]: Start difference. First operand has 137 places, 152 transitions, 1664 flow. Second operand 7 states and 184 transitions. [2024-06-28 02:34:55,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 178 transitions, 2070 flow [2024-06-28 02:34:55,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 178 transitions, 1876 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 02:34:55,577 INFO L231 Difference]: Finished difference. Result has 138 places, 152 transitions, 1637 flow [2024-06-28 02:34:55,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1637, PETRI_PLACES=138, PETRI_TRANSITIONS=152} [2024-06-28 02:34:55,578 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-28 02:34:55,578 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 152 transitions, 1637 flow [2024-06-28 02:34:55,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:55,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:55,578 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 02:34:55,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:34:55,579 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:55,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:55,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1970266282, now seen corresponding path program 1 times [2024-06-28 02:34:55,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:55,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074680743] [2024-06-28 02:34:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:55,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:55,645 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 02:34:55,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:55,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074680743] [2024-06-28 02:34:55,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074680743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:55,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:55,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:55,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46774278] [2024-06-28 02:34:55,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:55,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:55,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:55,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:55,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:55,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:55,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 152 transitions, 1637 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:55,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:55,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:55,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:55,907 INFO L124 PetriNetUnfolderBase]: 1309/2276 cut-off events. [2024-06-28 02:34:55,908 INFO L125 PetriNetUnfolderBase]: For 43248/43248 co-relation queries the response was YES. [2024-06-28 02:34:55,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12011 conditions, 2276 events. 1309/2276 cut-off events. For 43248/43248 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13108 event pairs, 341 based on Foata normal form. 2/2277 useless extension candidates. Maximal degree in co-relation 11946. Up to 2019 conditions per place. [2024-06-28 02:34:55,926 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 147 selfloop transitions, 20 changer transitions 0/175 dead transitions. [2024-06-28 02:34:55,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 175 transitions, 2157 flow [2024-06-28 02:34:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-28 02:34:55,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:34:55,927 INFO L175 Difference]: Start difference. First operand has 138 places, 152 transitions, 1637 flow. Second operand 6 states and 144 transitions. [2024-06-28 02:34:55,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 175 transitions, 2157 flow [2024-06-28 02:34:56,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 175 transitions, 2005 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 02:34:56,051 INFO L231 Difference]: Finished difference. Result has 137 places, 156 transitions, 1614 flow [2024-06-28 02:34:56,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1614, PETRI_PLACES=137, PETRI_TRANSITIONS=156} [2024-06-28 02:34:56,052 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-28 02:34:56,052 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 156 transitions, 1614 flow [2024-06-28 02:34:56,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:56,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:56,052 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 02:34:56,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:34:56,053 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:56,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash 728727600, now seen corresponding path program 2 times [2024-06-28 02:34:56,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:56,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218024958] [2024-06-28 02:34:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:56,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:56,129 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 02:34:56,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:56,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218024958] [2024-06-28 02:34:56,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218024958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:56,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:56,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:56,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645275668] [2024-06-28 02:34:56,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:56,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:56,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:56,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:56,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 156 transitions, 1614 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:56,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:56,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:56,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:56,406 INFO L124 PetriNetUnfolderBase]: 1317/2299 cut-off events. [2024-06-28 02:34:56,407 INFO L125 PetriNetUnfolderBase]: For 41463/41463 co-relation queries the response was YES. [2024-06-28 02:34:56,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11971 conditions, 2299 events. 1317/2299 cut-off events. For 41463/41463 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13296 event pairs, 372 based on Foata normal form. 2/2300 useless extension candidates. Maximal degree in co-relation 11906. Up to 2062 conditions per place. [2024-06-28 02:34:56,423 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 147 selfloop transitions, 17 changer transitions 0/172 dead transitions. [2024-06-28 02:34:56,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 172 transitions, 2018 flow [2024-06-28 02:34:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:34:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:34:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-28 02:34:56,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-28 02:34:56,424 INFO L175 Difference]: Start difference. First operand has 137 places, 156 transitions, 1614 flow. Second operand 6 states and 139 transitions. [2024-06-28 02:34:56,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 172 transitions, 2018 flow [2024-06-28 02:34:56,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 172 transitions, 1944 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-28 02:34:56,512 INFO L231 Difference]: Finished difference. Result has 141 places, 158 transitions, 1625 flow [2024-06-28 02:34:56,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1625, PETRI_PLACES=141, PETRI_TRANSITIONS=158} [2024-06-28 02:34:56,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-28 02:34:56,513 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 158 transitions, 1625 flow [2024-06-28 02:34:56,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:56,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:56,514 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 02:34:56,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:34:56,514 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:56,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:56,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1984928720, now seen corresponding path program 3 times [2024-06-28 02:34:56,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:56,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253425420] [2024-06-28 02:34:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:56,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:56,586 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 02:34:56,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:56,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253425420] [2024-06-28 02:34:56,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253425420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:56,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:56,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:56,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914602777] [2024-06-28 02:34:56,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:56,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:56,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:56,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:56,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:56,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 158 transitions, 1625 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:56,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:56,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:56,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:56,893 INFO L124 PetriNetUnfolderBase]: 1312/2281 cut-off events. [2024-06-28 02:34:56,893 INFO L125 PetriNetUnfolderBase]: For 42195/42195 co-relation queries the response was YES. [2024-06-28 02:34:56,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11856 conditions, 2281 events. 1312/2281 cut-off events. For 42195/42195 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13148 event pairs, 340 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 11789. Up to 2040 conditions per place. [2024-06-28 02:34:56,907 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 150 selfloop transitions, 16 changer transitions 0/174 dead transitions. [2024-06-28 02:34:56,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 174 transitions, 1997 flow [2024-06-28 02:34:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:34:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:34:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-28 02:34:56,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-28 02:34:56,908 INFO L175 Difference]: Start difference. First operand has 141 places, 158 transitions, 1625 flow. Second operand 5 states and 124 transitions. [2024-06-28 02:34:56,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 174 transitions, 1997 flow [2024-06-28 02:34:57,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 174 transitions, 1924 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 02:34:57,005 INFO L231 Difference]: Finished difference. Result has 142 places, 158 transitions, 1592 flow [2024-06-28 02:34:57,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1592, PETRI_PLACES=142, PETRI_TRANSITIONS=158} [2024-06-28 02:34:57,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-28 02:34:57,006 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 158 transitions, 1592 flow [2024-06-28 02:34:57,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:34:57,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:57,006 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 02:34:57,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:34:57,006 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:57,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1671073924, now seen corresponding path program 1 times [2024-06-28 02:34:57,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:57,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423285322] [2024-06-28 02:34:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:57,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:57,074 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 02:34:57,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:57,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423285322] [2024-06-28 02:34:57,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423285322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:57,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:57,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:57,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118392243] [2024-06-28 02:34:57,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:57,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:57,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:57,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-28 02:34:57,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 158 transitions, 1592 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 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 02:34:57,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:57,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-28 02:34:57,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:57,345 INFO L124 PetriNetUnfolderBase]: 1255/2222 cut-off events. [2024-06-28 02:34:57,345 INFO L125 PetriNetUnfolderBase]: For 47205/47205 co-relation queries the response was YES. [2024-06-28 02:34:57,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11613 conditions, 2222 events. 1255/2222 cut-off events. For 47205/47205 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12999 event pairs, 271 based on Foata normal form. 7/2210 useless extension candidates. Maximal degree in co-relation 11545. Up to 1794 conditions per place. [2024-06-28 02:34:57,362 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 124 selfloop transitions, 30 changer transitions 1/181 dead transitions. [2024-06-28 02:34:57,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 181 transitions, 1982 flow [2024-06-28 02:34:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:34:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:34:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-28 02:34:57,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.685 [2024-06-28 02:34:57,364 INFO L175 Difference]: Start difference. First operand has 142 places, 158 transitions, 1592 flow. Second operand 5 states and 137 transitions. [2024-06-28 02:34:57,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 181 transitions, 1982 flow [2024-06-28 02:34:57,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 181 transitions, 1943 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 02:34:57,445 INFO L231 Difference]: Finished difference. Result has 143 places, 159 transitions, 1636 flow [2024-06-28 02:34:57,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1636, PETRI_PLACES=143, PETRI_TRANSITIONS=159} [2024-06-28 02:34:57,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-28 02:34:57,446 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 159 transitions, 1636 flow [2024-06-28 02:34:57,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 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 02:34:57,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:57,446 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 02:34:57,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:34:57,447 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:57,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:57,447 INFO L85 PathProgramCache]: Analyzing trace with hash -438413514, now seen corresponding path program 2 times [2024-06-28 02:34:57,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:57,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380672031] [2024-06-28 02:34:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:57,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:57,513 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 02:34:57,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:57,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380672031] [2024-06-28 02:34:57,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380672031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:57,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:57,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:34:57,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556475793] [2024-06-28 02:34:57,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:57,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:34:57,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:34:57,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:34:57,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-28 02:34:57,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 159 transitions, 1636 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 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 02:34:57,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:57,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-28 02:34:57,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:57,808 INFO L124 PetriNetUnfolderBase]: 1257/2215 cut-off events. [2024-06-28 02:34:57,808 INFO L125 PetriNetUnfolderBase]: For 48046/48051 co-relation queries the response was YES. [2024-06-28 02:34:57,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11645 conditions, 2215 events. 1257/2215 cut-off events. For 48046/48051 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12962 event pairs, 277 based on Foata normal form. 13/2208 useless extension candidates. Maximal degree in co-relation 11576. Up to 1693 conditions per place. [2024-06-28 02:34:57,822 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 129 selfloop transitions, 25 changer transitions 0/180 dead transitions. [2024-06-28 02:34:57,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 180 transitions, 2094 flow [2024-06-28 02:34:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:34:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:34:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-28 02:34:57,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-06-28 02:34:57,823 INFO L175 Difference]: Start difference. First operand has 143 places, 159 transitions, 1636 flow. Second operand 5 states and 131 transitions. [2024-06-28 02:34:57,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 180 transitions, 2094 flow [2024-06-28 02:34:57,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 180 transitions, 2039 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 02:34:57,905 INFO L231 Difference]: Finished difference. Result has 145 places, 160 transitions, 1647 flow [2024-06-28 02:34:57,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1647, PETRI_PLACES=145, PETRI_TRANSITIONS=160} [2024-06-28 02:34:57,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-28 02:34:57,906 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 160 transitions, 1647 flow [2024-06-28 02:34:57,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 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 02:34:57,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:57,906 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 02:34:57,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:34:57,906 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:57,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:57,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1027154146, now seen corresponding path program 1 times [2024-06-28 02:34:57,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:57,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519235378] [2024-06-28 02:34:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:57,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:57,976 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 02:34:57,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:57,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519235378] [2024-06-28 02:34:57,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519235378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:57,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:57,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:57,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857776927] [2024-06-28 02:34:57,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:57,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:57,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:57,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:57,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:58,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:58,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 160 transitions, 1647 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:34:58,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:58,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:58,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:58,301 INFO L124 PetriNetUnfolderBase]: 1501/2597 cut-off events. [2024-06-28 02:34:58,301 INFO L125 PetriNetUnfolderBase]: For 67027/67027 co-relation queries the response was YES. [2024-06-28 02:34:58,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14260 conditions, 2597 events. 1501/2597 cut-off events. For 67027/67027 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15360 event pairs, 362 based on Foata normal form. 12/2607 useless extension candidates. Maximal degree in co-relation 14190. Up to 1840 conditions per place. [2024-06-28 02:34:58,321 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 56 changer transitions 0/196 dead transitions. [2024-06-28 02:34:58,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 196 transitions, 2387 flow [2024-06-28 02:34:58,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:34:58,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-28 02:34:58,322 INFO L175 Difference]: Start difference. First operand has 145 places, 160 transitions, 1647 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:34:58,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 196 transitions, 2387 flow [2024-06-28 02:34:58,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 196 transitions, 2344 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 02:34:58,448 INFO L231 Difference]: Finished difference. Result has 151 places, 165 transitions, 1814 flow [2024-06-28 02:34:58,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1814, PETRI_PLACES=151, PETRI_TRANSITIONS=165} [2024-06-28 02:34:58,449 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-28 02:34:58,449 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 165 transitions, 1814 flow [2024-06-28 02:34:58,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:34:58,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:58,449 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 02:34:58,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:34:58,449 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:58,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:58,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1015949186, now seen corresponding path program 2 times [2024-06-28 02:34:58,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:58,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152643928] [2024-06-28 02:34:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:58,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:58,525 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 02:34:58,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:58,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152643928] [2024-06-28 02:34:58,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152643928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:58,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:58,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:58,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594528071] [2024-06-28 02:34:58,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:58,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:58,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:58,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:58,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:58,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 165 transitions, 1814 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:34:58,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:58,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:58,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:58,869 INFO L124 PetriNetUnfolderBase]: 1557/2693 cut-off events. [2024-06-28 02:34:58,869 INFO L125 PetriNetUnfolderBase]: For 75435/75435 co-relation queries the response was YES. [2024-06-28 02:34:58,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15137 conditions, 2693 events. 1557/2693 cut-off events. For 75435/75435 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16083 event pairs, 462 based on Foata normal form. 16/2707 useless extension candidates. Maximal degree in co-relation 15065. Up to 2279 conditions per place. [2024-06-28 02:34:58,889 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 124 selfloop transitions, 53 changer transitions 0/185 dead transitions. [2024-06-28 02:34:58,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 185 transitions, 2270 flow [2024-06-28 02:34:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-28 02:34:58,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:34:58,890 INFO L175 Difference]: Start difference. First operand has 151 places, 165 transitions, 1814 flow. Second operand 7 states and 168 transitions. [2024-06-28 02:34:58,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 185 transitions, 2270 flow [2024-06-28 02:34:59,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 185 transitions, 2183 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 02:34:59,025 INFO L231 Difference]: Finished difference. Result has 156 places, 167 transitions, 1881 flow [2024-06-28 02:34:59,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1881, PETRI_PLACES=156, PETRI_TRANSITIONS=167} [2024-06-28 02:34:59,025 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-28 02:34:59,026 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 167 transitions, 1881 flow [2024-06-28 02:34:59,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:34:59,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:59,026 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 02:34:59,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:34:59,026 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:59,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1029028096, now seen corresponding path program 3 times [2024-06-28 02:34:59,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:59,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066280973] [2024-06-28 02:34:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:59,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:59,096 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 02:34:59,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:59,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066280973] [2024-06-28 02:34:59,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066280973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:59,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:59,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:59,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007034745] [2024-06-28 02:34:59,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:59,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:59,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:59,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:59,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:59,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:59,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 167 transitions, 1881 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:34:59,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:59,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:59,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:34:59,449 INFO L124 PetriNetUnfolderBase]: 1663/2869 cut-off events. [2024-06-28 02:34:59,449 INFO L125 PetriNetUnfolderBase]: For 84893/84893 co-relation queries the response was YES. [2024-06-28 02:34:59,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16612 conditions, 2869 events. 1663/2869 cut-off events. For 84893/84893 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17393 event pairs, 479 based on Foata normal form. 12/2879 useless extension candidates. Maximal degree in co-relation 16538. Up to 2287 conditions per place. [2024-06-28 02:34:59,472 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 133 selfloop transitions, 52 changer transitions 0/193 dead transitions. [2024-06-28 02:34:59,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 193 transitions, 2485 flow [2024-06-28 02:34:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:34:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:34:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:34:59,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-28 02:34:59,473 INFO L175 Difference]: Start difference. First operand has 156 places, 167 transitions, 1881 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:34:59,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 193 transitions, 2485 flow [2024-06-28 02:34:59,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 193 transitions, 2359 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 02:34:59,644 INFO L231 Difference]: Finished difference. Result has 159 places, 171 transitions, 1963 flow [2024-06-28 02:34:59,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1963, PETRI_PLACES=159, PETRI_TRANSITIONS=171} [2024-06-28 02:34:59,644 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-28 02:34:59,644 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 171 transitions, 1963 flow [2024-06-28 02:34:59,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:34:59,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:34:59,645 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 02:34:59,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:34:59,645 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:34:59,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:34:59,645 INFO L85 PathProgramCache]: Analyzing trace with hash -645477022, now seen corresponding path program 4 times [2024-06-28 02:34:59,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:34:59,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754916147] [2024-06-28 02:34:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:34:59,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:34:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:34:59,728 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 02:34:59,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:34:59,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754916147] [2024-06-28 02:34:59,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754916147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:34:59,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:34:59,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:34:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130415252] [2024-06-28 02:34:59,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:34:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:34:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:34:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:34:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:34:59,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:34:59,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 171 transitions, 1963 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:34:59,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:34:59,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:34:59,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:00,159 INFO L124 PetriNetUnfolderBase]: 1795/3076 cut-off events. [2024-06-28 02:35:00,159 INFO L125 PetriNetUnfolderBase]: For 114772/114772 co-relation queries the response was YES. [2024-06-28 02:35:00,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17842 conditions, 3076 events. 1795/3076 cut-off events. For 114772/114772 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18882 event pairs, 541 based on Foata normal form. 42/3115 useless extension candidates. Maximal degree in co-relation 17766. Up to 2493 conditions per place. [2024-06-28 02:35:00,185 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 119 selfloop transitions, 58 changer transitions 7/192 dead transitions. [2024-06-28 02:35:00,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 192 transitions, 2451 flow [2024-06-28 02:35:00,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:35:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:35:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 02:35:00,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 02:35:00,186 INFO L175 Difference]: Start difference. First operand has 159 places, 171 transitions, 1963 flow. Second operand 6 states and 152 transitions. [2024-06-28 02:35:00,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 192 transitions, 2451 flow [2024-06-28 02:35:00,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 192 transitions, 2354 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 02:35:00,328 INFO L231 Difference]: Finished difference. Result has 162 places, 168 transitions, 1997 flow [2024-06-28 02:35:00,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1997, PETRI_PLACES=162, PETRI_TRANSITIONS=168} [2024-06-28 02:35:00,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-28 02:35:00,328 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 168 transitions, 1997 flow [2024-06-28 02:35:00,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:00,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:00,329 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 02:35:00,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:35:00,329 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:00,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash -645480742, now seen corresponding path program 5 times [2024-06-28 02:35:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:00,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278227387] [2024-06-28 02:35:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:00,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:00,404 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 02:35:00,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:00,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278227387] [2024-06-28 02:35:00,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278227387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:00,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:00,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:00,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444979375] [2024-06-28 02:35:00,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:00,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:00,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:00,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:00,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:00,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 168 transitions, 1997 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:00,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:00,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:00,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:00,888 INFO L124 PetriNetUnfolderBase]: 1952/3359 cut-off events. [2024-06-28 02:35:00,888 INFO L125 PetriNetUnfolderBase]: For 136014/136014 co-relation queries the response was YES. [2024-06-28 02:35:00,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20162 conditions, 3359 events. 1952/3359 cut-off events. For 136014/136014 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21090 event pairs, 496 based on Foata normal form. 36/3392 useless extension candidates. Maximal degree in co-relation 20084. Up to 1983 conditions per place. [2024-06-28 02:35:00,912 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 124 selfloop transitions, 59 changer transitions 10/201 dead transitions. [2024-06-28 02:35:00,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 201 transitions, 2691 flow [2024-06-28 02:35:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:35:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:35:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-28 02:35:00,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-06-28 02:35:00,914 INFO L175 Difference]: Start difference. First operand has 162 places, 168 transitions, 1997 flow. Second operand 6 states and 161 transitions. [2024-06-28 02:35:00,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 201 transitions, 2691 flow [2024-06-28 02:35:01,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 201 transitions, 2547 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:01,097 INFO L231 Difference]: Finished difference. Result has 165 places, 164 transitions, 1995 flow [2024-06-28 02:35:01,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1995, PETRI_PLACES=165, PETRI_TRANSITIONS=164} [2024-06-28 02:35:01,098 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-28 02:35:01,098 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 164 transitions, 1995 flow [2024-06-28 02:35:01,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:01,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:01,098 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 02:35:01,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:35:01,098 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:01,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash -446031082, now seen corresponding path program 6 times [2024-06-28 02:35:01,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:01,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065239720] [2024-06-28 02:35:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:01,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:01,188 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 02:35:01,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065239720] [2024-06-28 02:35:01,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065239720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:01,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:01,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615040249] [2024-06-28 02:35:01,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:01,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:01,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:01,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 164 transitions, 1995 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:01,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:01,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:01,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:01,582 INFO L124 PetriNetUnfolderBase]: 1732/2981 cut-off events. [2024-06-28 02:35:01,583 INFO L125 PetriNetUnfolderBase]: For 119403/119403 co-relation queries the response was YES. [2024-06-28 02:35:01,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17569 conditions, 2981 events. 1732/2981 cut-off events. For 119403/119403 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18369 event pairs, 509 based on Foata normal form. 42/3020 useless extension candidates. Maximal degree in co-relation 17489. Up to 2410 conditions per place. [2024-06-28 02:35:01,609 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 55 changer transitions 6/187 dead transitions. [2024-06-28 02:35:01,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 187 transitions, 2486 flow [2024-06-28 02:35:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:01,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-28 02:35:01,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-28 02:35:01,610 INFO L175 Difference]: Start difference. First operand has 165 places, 164 transitions, 1995 flow. Second operand 8 states and 193 transitions. [2024-06-28 02:35:01,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 187 transitions, 2486 flow [2024-06-28 02:35:01,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 187 transitions, 2290 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-28 02:35:01,772 INFO L231 Difference]: Finished difference. Result has 166 places, 162 transitions, 1934 flow [2024-06-28 02:35:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1934, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2024-06-28 02:35:01,773 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-28 02:35:01,773 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 1934 flow [2024-06-28 02:35:01,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:01,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:01,773 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 02:35:01,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:35:01,773 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:01,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:01,774 INFO L85 PathProgramCache]: Analyzing trace with hash -438406570, now seen corresponding path program 1 times [2024-06-28 02:35:01,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:01,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114643448] [2024-06-28 02:35:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:01,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:01,846 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 02:35:01,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:01,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114643448] [2024-06-28 02:35:01,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114643448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:01,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:01,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:01,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610816038] [2024-06-28 02:35:01,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:01,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:01,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:01,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:01,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:01,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 1934 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:01,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:01,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:01,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:02,280 INFO L124 PetriNetUnfolderBase]: 1744/3037 cut-off events. [2024-06-28 02:35:02,281 INFO L125 PetriNetUnfolderBase]: For 110083/110083 co-relation queries the response was YES. [2024-06-28 02:35:02,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16901 conditions, 3037 events. 1744/3037 cut-off events. For 110083/110083 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18925 event pairs, 445 based on Foata normal form. 36/3070 useless extension candidates. Maximal degree in co-relation 16822. Up to 2283 conditions per place. [2024-06-28 02:35:02,303 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 116 selfloop transitions, 58 changer transitions 10/192 dead transitions. [2024-06-28 02:35:02,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 192 transitions, 2457 flow [2024-06-28 02:35:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-28 02:35:02,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-28 02:35:02,305 INFO L175 Difference]: Start difference. First operand has 166 places, 162 transitions, 1934 flow. Second operand 8 states and 197 transitions. [2024-06-28 02:35:02,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 192 transitions, 2457 flow [2024-06-28 02:35:02,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 192 transitions, 2250 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-28 02:35:02,444 INFO L231 Difference]: Finished difference. Result has 167 places, 160 transitions, 1850 flow [2024-06-28 02:35:02,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1850, PETRI_PLACES=167, PETRI_TRANSITIONS=160} [2024-06-28 02:35:02,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-28 02:35:02,445 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 160 transitions, 1850 flow [2024-06-28 02:35:02,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:02,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:02,445 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 02:35:02,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:35:02,445 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:02,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:02,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2130994535, now seen corresponding path program 1 times [2024-06-28 02:35:02,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:02,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461034951] [2024-06-28 02:35:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:02,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:02,512 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 02:35:02,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:02,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461034951] [2024-06-28 02:35:02,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461034951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:02,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:02,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:02,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196534707] [2024-06-28 02:35:02,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:02,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:02,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:02,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:02,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:02,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 160 transitions, 1850 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:02,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:02,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:02,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:02,881 INFO L124 PetriNetUnfolderBase]: 1644/2854 cut-off events. [2024-06-28 02:35:02,882 INFO L125 PetriNetUnfolderBase]: For 82297/82297 co-relation queries the response was YES. [2024-06-28 02:35:02,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16236 conditions, 2854 events. 1644/2854 cut-off events. For 82297/82297 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17439 event pairs, 453 based on Foata normal form. 1/2853 useless extension candidates. Maximal degree in co-relation 16155. Up to 2538 conditions per place. [2024-06-28 02:35:02,905 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 155 selfloop transitions, 26 changer transitions 0/189 dead transitions. [2024-06-28 02:35:02,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 189 transitions, 2330 flow [2024-06-28 02:35:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:35:02,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-28 02:35:02,907 INFO L175 Difference]: Start difference. First operand has 167 places, 160 transitions, 1850 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:35:02,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 189 transitions, 2330 flow [2024-06-28 02:35:03,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 189 transitions, 2159 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-28 02:35:03,098 INFO L231 Difference]: Finished difference. Result has 166 places, 163 transitions, 1795 flow [2024-06-28 02:35:03,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1795, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2024-06-28 02:35:03,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-28 02:35:03,099 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 1795 flow [2024-06-28 02:35:03,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:03,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:03,100 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 02:35:03,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:35:03,100 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:03,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:03,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1765370697, now seen corresponding path program 2 times [2024-06-28 02:35:03,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:03,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295885375] [2024-06-28 02:35:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:03,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:03,163 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 02:35:03,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:03,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295885375] [2024-06-28 02:35:03,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295885375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:03,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:03,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:03,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463841556] [2024-06-28 02:35:03,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:03,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:03,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:03,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:03,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:03,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:03,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 1795 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:03,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:03,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:03,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:03,546 INFO L124 PetriNetUnfolderBase]: 1673/2914 cut-off events. [2024-06-28 02:35:03,546 INFO L125 PetriNetUnfolderBase]: For 87798/87798 co-relation queries the response was YES. [2024-06-28 02:35:03,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16789 conditions, 2914 events. 1673/2914 cut-off events. For 87798/87798 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18061 event pairs, 475 based on Foata normal form. 1/2909 useless extension candidates. Maximal degree in co-relation 16710. Up to 2423 conditions per place. [2024-06-28 02:35:03,570 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 120 selfloop transitions, 75 changer transitions 0/203 dead transitions. [2024-06-28 02:35:03,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 203 transitions, 2741 flow [2024-06-28 02:35:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-28 02:35:03,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 02:35:03,572 INFO L175 Difference]: Start difference. First operand has 166 places, 163 transitions, 1795 flow. Second operand 7 states and 182 transitions. [2024-06-28 02:35:03,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 203 transitions, 2741 flow [2024-06-28 02:35:03,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 203 transitions, 2639 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:03,775 INFO L231 Difference]: Finished difference. Result has 168 places, 177 transitions, 2097 flow [2024-06-28 02:35:03,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2097, PETRI_PLACES=168, PETRI_TRANSITIONS=177} [2024-06-28 02:35:03,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-28 02:35:03,776 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 177 transitions, 2097 flow [2024-06-28 02:35:03,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:03,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:03,776 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 02:35:03,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:35:03,777 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:03,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:03,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1105209289, now seen corresponding path program 3 times [2024-06-28 02:35:03,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:03,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037227430] [2024-06-28 02:35:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:03,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:03,841 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 02:35:03,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:03,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037227430] [2024-06-28 02:35:03,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037227430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:03,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:03,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:03,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115711059] [2024-06-28 02:35:03,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:03,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:03,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:03,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:03,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 177 transitions, 2097 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:03,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:03,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:03,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:04,201 INFO L124 PetriNetUnfolderBase]: 1678/2915 cut-off events. [2024-06-28 02:35:04,202 INFO L125 PetriNetUnfolderBase]: For 90247/90247 co-relation queries the response was YES. [2024-06-28 02:35:04,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17351 conditions, 2915 events. 1678/2915 cut-off events. For 90247/90247 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18031 event pairs, 467 based on Foata normal form. 1/2910 useless extension candidates. Maximal degree in co-relation 17271. Up to 2427 conditions per place. [2024-06-28 02:35:04,227 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 77 changer transitions 0/203 dead transitions. [2024-06-28 02:35:04,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 203 transitions, 2865 flow [2024-06-28 02:35:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 02:35:04,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-28 02:35:04,229 INFO L175 Difference]: Start difference. First operand has 168 places, 177 transitions, 2097 flow. Second operand 7 states and 178 transitions. [2024-06-28 02:35:04,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 203 transitions, 2865 flow [2024-06-28 02:35:04,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 203 transitions, 2708 flow, removed 68 selfloop flow, removed 1 redundant places. [2024-06-28 02:35:04,472 INFO L231 Difference]: Finished difference. Result has 174 places, 180 transitions, 2164 flow [2024-06-28 02:35:04,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1968, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2164, PETRI_PLACES=174, PETRI_TRANSITIONS=180} [2024-06-28 02:35:04,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-28 02:35:04,473 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 180 transitions, 2164 flow [2024-06-28 02:35:04,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:04,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:04,473 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 02:35:04,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:35:04,474 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:04,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:04,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2027613709, now seen corresponding path program 4 times [2024-06-28 02:35:04,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:04,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693742637] [2024-06-28 02:35:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:04,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:04,557 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 02:35:04,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:04,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693742637] [2024-06-28 02:35:04,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693742637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:04,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:04,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:04,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513395294] [2024-06-28 02:35:04,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:04,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:04,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:04,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:04,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:04,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:04,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 180 transitions, 2164 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:04,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:04,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:04,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:04,983 INFO L124 PetriNetUnfolderBase]: 1683/2934 cut-off events. [2024-06-28 02:35:04,984 INFO L125 PetriNetUnfolderBase]: For 91161/91161 co-relation queries the response was YES. [2024-06-28 02:35:05,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17158 conditions, 2934 events. 1683/2934 cut-off events. For 91161/91161 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18179 event pairs, 457 based on Foata normal form. 1/2933 useless extension candidates. Maximal degree in co-relation 17075. Up to 2598 conditions per place. [2024-06-28 02:35:05,014 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 167 selfloop transitions, 26 changer transitions 0/201 dead transitions. [2024-06-28 02:35:05,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 201 transitions, 2642 flow [2024-06-28 02:35:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-28 02:35:05,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-28 02:35:05,015 INFO L175 Difference]: Start difference. First operand has 174 places, 180 transitions, 2164 flow. Second operand 7 states and 165 transitions. [2024-06-28 02:35:05,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 201 transitions, 2642 flow [2024-06-28 02:35:05,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 201 transitions, 2486 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:05,211 INFO L231 Difference]: Finished difference. Result has 177 places, 183 transitions, 2114 flow [2024-06-28 02:35:05,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2114, PETRI_PLACES=177, PETRI_TRANSITIONS=183} [2024-06-28 02:35:05,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-28 02:35:05,212 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 183 transitions, 2114 flow [2024-06-28 02:35:05,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:05,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:05,212 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 02:35:05,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:35:05,213 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:05,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash -727912971, now seen corresponding path program 1 times [2024-06-28 02:35:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409508719] [2024-06-28 02:35:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:05,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:05,301 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 02:35:05,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:05,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409508719] [2024-06-28 02:35:05,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409508719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:05,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:05,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:05,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204075180] [2024-06-28 02:35:05,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:05,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:05,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:05,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:05,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:05,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:05,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 183 transitions, 2114 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:05,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:05,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:05,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:05,760 INFO L124 PetriNetUnfolderBase]: 1763/3040 cut-off events. [2024-06-28 02:35:05,760 INFO L125 PetriNetUnfolderBase]: For 109586/109586 co-relation queries the response was YES. [2024-06-28 02:35:05,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18419 conditions, 3040 events. 1763/3040 cut-off events. For 109586/109586 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18820 event pairs, 476 based on Foata normal form. 2/3029 useless extension candidates. Maximal degree in co-relation 18335. Up to 2566 conditions per place. [2024-06-28 02:35:05,788 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 146 selfloop transitions, 64 changer transitions 0/218 dead transitions. [2024-06-28 02:35:05,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 218 transitions, 2825 flow [2024-06-28 02:35:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:35:05,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-28 02:35:05,789 INFO L175 Difference]: Start difference. First operand has 177 places, 183 transitions, 2114 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:35:05,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 218 transitions, 2825 flow [2024-06-28 02:35:05,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 218 transitions, 2753 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:05,999 INFO L231 Difference]: Finished difference. Result has 180 places, 189 transitions, 2305 flow [2024-06-28 02:35:05,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2305, PETRI_PLACES=180, PETRI_TRANSITIONS=189} [2024-06-28 02:35:06,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-28 02:35:06,000 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 189 transitions, 2305 flow [2024-06-28 02:35:06,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:06,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:06,000 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 02:35:06,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:35:06,000 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:06,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash 550105849, now seen corresponding path program 2 times [2024-06-28 02:35:06,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:06,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736268773] [2024-06-28 02:35:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:06,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:06,071 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 02:35:06,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:06,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736268773] [2024-06-28 02:35:06,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736268773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:06,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:06,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:06,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334398015] [2024-06-28 02:35:06,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:06,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:06,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:06,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:06,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:06,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:06,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 189 transitions, 2305 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:06,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:06,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:06,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:06,456 INFO L124 PetriNetUnfolderBase]: 1758/3044 cut-off events. [2024-06-28 02:35:06,456 INFO L125 PetriNetUnfolderBase]: For 112532/112532 co-relation queries the response was YES. [2024-06-28 02:35:06,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18693 conditions, 3044 events. 1758/3044 cut-off events. For 112532/112532 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18874 event pairs, 488 based on Foata normal form. 2/3039 useless extension candidates. Maximal degree in co-relation 18607. Up to 2649 conditions per place. [2024-06-28 02:35:06,484 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 143 selfloop transitions, 59 changer transitions 0/210 dead transitions. [2024-06-28 02:35:06,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 210 transitions, 2761 flow [2024-06-28 02:35:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:35:06,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-28 02:35:06,485 INFO L175 Difference]: Start difference. First operand has 180 places, 189 transitions, 2305 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:35:06,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 210 transitions, 2761 flow [2024-06-28 02:35:06,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 210 transitions, 2623 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:06,732 INFO L231 Difference]: Finished difference. Result has 183 places, 189 transitions, 2290 flow [2024-06-28 02:35:06,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2290, PETRI_PLACES=183, PETRI_TRANSITIONS=189} [2024-06-28 02:35:06,733 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-28 02:35:06,733 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 189 transitions, 2290 flow [2024-06-28 02:35:06,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:06,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:06,733 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 02:35:06,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:35:06,734 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:06,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:06,734 INFO L85 PathProgramCache]: Analyzing trace with hash -444125707, now seen corresponding path program 3 times [2024-06-28 02:35:06,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:06,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761266735] [2024-06-28 02:35:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:06,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:06,810 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 02:35:06,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:06,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761266735] [2024-06-28 02:35:06,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761266735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:06,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:06,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:06,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907604719] [2024-06-28 02:35:06,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:06,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:06,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:06,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:06,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:06,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:06,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 189 transitions, 2290 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:06,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:06,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:06,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:07,229 INFO L124 PetriNetUnfolderBase]: 1766/3061 cut-off events. [2024-06-28 02:35:07,230 INFO L125 PetriNetUnfolderBase]: For 116701/116701 co-relation queries the response was YES. [2024-06-28 02:35:07,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18807 conditions, 3061 events. 1766/3061 cut-off events. For 116701/116701 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18963 event pairs, 476 based on Foata normal form. 2/3059 useless extension candidates. Maximal degree in co-relation 18720. Up to 2720 conditions per place. [2024-06-28 02:35:07,258 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 177 selfloop transitions, 25 changer transitions 0/210 dead transitions. [2024-06-28 02:35:07,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 210 transitions, 2790 flow [2024-06-28 02:35:07,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-28 02:35:07,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-28 02:35:07,259 INFO L175 Difference]: Start difference. First operand has 183 places, 189 transitions, 2290 flow. Second operand 7 states and 165 transitions. [2024-06-28 02:35:07,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 210 transitions, 2790 flow [2024-06-28 02:35:07,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 210 transitions, 2651 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:07,506 INFO L231 Difference]: Finished difference. Result has 185 places, 191 transitions, 2254 flow [2024-06-28 02:35:07,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2254, PETRI_PLACES=185, PETRI_TRANSITIONS=191} [2024-06-28 02:35:07,507 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-28 02:35:07,507 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 191 transitions, 2254 flow [2024-06-28 02:35:07,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:07,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:07,507 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 02:35:07,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:35:07,507 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:07,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:07,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2112212271, now seen corresponding path program 5 times [2024-06-28 02:35:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:07,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346213284] [2024-06-28 02:35:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:07,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:07,574 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 02:35:07,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:07,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346213284] [2024-06-28 02:35:07,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346213284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:07,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:07,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:07,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51475984] [2024-06-28 02:35:07,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:07,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:07,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:07,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:07,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:07,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 191 transitions, 2254 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:07,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:07,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:07,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:07,965 INFO L124 PetriNetUnfolderBase]: 1771/3063 cut-off events. [2024-06-28 02:35:07,966 INFO L125 PetriNetUnfolderBase]: For 120183/120183 co-relation queries the response was YES. [2024-06-28 02:35:07,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18850 conditions, 3063 events. 1771/3063 cut-off events. For 120183/120183 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19076 event pairs, 496 based on Foata normal form. 1/3061 useless extension candidates. Maximal degree in co-relation 18762. Up to 2560 conditions per place. [2024-06-28 02:35:07,994 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 74 changer transitions 0/216 dead transitions. [2024-06-28 02:35:07,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 216 transitions, 2968 flow [2024-06-28 02:35:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 02:35:07,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-28 02:35:07,995 INFO L175 Difference]: Start difference. First operand has 185 places, 191 transitions, 2254 flow. Second operand 7 states and 176 transitions. [2024-06-28 02:35:07,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 216 transitions, 2968 flow [2024-06-28 02:35:08,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 216 transitions, 2895 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:08,249 INFO L231 Difference]: Finished difference. Result has 187 places, 194 transitions, 2387 flow [2024-06-28 02:35:08,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2387, PETRI_PLACES=187, PETRI_TRANSITIONS=194} [2024-06-28 02:35:08,249 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-28 02:35:08,250 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 194 transitions, 2387 flow [2024-06-28 02:35:08,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:08,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:08,250 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 02:35:08,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:35:08,250 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:08,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:08,251 INFO L85 PathProgramCache]: Analyzing trace with hash 999432917, now seen corresponding path program 6 times [2024-06-28 02:35:08,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:08,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015951993] [2024-06-28 02:35:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:08,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:08,313 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 02:35:08,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:08,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015951993] [2024-06-28 02:35:08,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015951993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:08,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:08,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:08,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517723242] [2024-06-28 02:35:08,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:08,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:08,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:08,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:08,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:08,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 194 transitions, 2387 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:08,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:08,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:08,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:08,713 INFO L124 PetriNetUnfolderBase]: 1776/3084 cut-off events. [2024-06-28 02:35:08,713 INFO L125 PetriNetUnfolderBase]: For 124615/124615 co-relation queries the response was YES. [2024-06-28 02:35:08,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19141 conditions, 3084 events. 1776/3084 cut-off events. For 124615/124615 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19295 event pairs, 506 based on Foata normal form. 1/3082 useless extension candidates. Maximal degree in co-relation 19052. Up to 2564 conditions per place. [2024-06-28 02:35:08,746 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 75 changer transitions 0/216 dead transitions. [2024-06-28 02:35:08,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 216 transitions, 3103 flow [2024-06-28 02:35:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:35:08,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-28 02:35:08,747 INFO L175 Difference]: Start difference. First operand has 187 places, 194 transitions, 2387 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:35:08,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 216 transitions, 3103 flow [2024-06-28 02:35:08,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 216 transitions, 2845 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:08,986 INFO L231 Difference]: Finished difference. Result has 188 places, 197 transitions, 2343 flow [2024-06-28 02:35:08,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2343, PETRI_PLACES=188, PETRI_TRANSITIONS=197} [2024-06-28 02:35:08,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-28 02:35:08,987 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 197 transitions, 2343 flow [2024-06-28 02:35:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:08,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:08,988 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 02:35:08,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:35:08,988 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:08,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash 218987823, now seen corresponding path program 7 times [2024-06-28 02:35:08,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:08,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138734613] [2024-06-28 02:35:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:08,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:09,063 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 02:35:09,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:09,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138734613] [2024-06-28 02:35:09,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138734613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:09,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:09,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:09,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128312593] [2024-06-28 02:35:09,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:09,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:09,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:09,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:09,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 197 transitions, 2343 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:09,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:09,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:09,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:09,498 INFO L124 PetriNetUnfolderBase]: 1794/3103 cut-off events. [2024-06-28 02:35:09,498 INFO L125 PetriNetUnfolderBase]: For 131756/131756 co-relation queries the response was YES. [2024-06-28 02:35:09,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19252 conditions, 3103 events. 1794/3103 cut-off events. For 131756/131756 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19377 event pairs, 497 based on Foata normal form. 2/3102 useless extension candidates. Maximal degree in co-relation 19164. Up to 2583 conditions per place. [2024-06-28 02:35:09,526 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 77 changer transitions 0/220 dead transitions. [2024-06-28 02:35:09,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 220 transitions, 3107 flow [2024-06-28 02:35:09,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:35:09,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-28 02:35:09,527 INFO L175 Difference]: Start difference. First operand has 188 places, 197 transitions, 2343 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:35:09,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 220 transitions, 3107 flow [2024-06-28 02:35:09,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 220 transitions, 2948 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:09,835 INFO L231 Difference]: Finished difference. Result has 191 places, 204 transitions, 2449 flow [2024-06-28 02:35:09,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2449, PETRI_PLACES=191, PETRI_TRANSITIONS=204} [2024-06-28 02:35:09,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-28 02:35:09,835 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 204 transitions, 2449 flow [2024-06-28 02:35:09,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:09,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:09,836 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 02:35:09,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:35:09,836 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:09,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:09,836 INFO L85 PathProgramCache]: Analyzing trace with hash -654946761, now seen corresponding path program 8 times [2024-06-28 02:35:09,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:09,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491800656] [2024-06-28 02:35:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:09,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:09,903 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 02:35:09,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:09,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491800656] [2024-06-28 02:35:09,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491800656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:09,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:09,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:09,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262473518] [2024-06-28 02:35:09,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:09,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:09,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:09,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:09,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:09,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 204 transitions, 2449 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:09,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:09,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:09,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:10,382 INFO L124 PetriNetUnfolderBase]: 1788/3104 cut-off events. [2024-06-28 02:35:10,382 INFO L125 PetriNetUnfolderBase]: For 133606/133606 co-relation queries the response was YES. [2024-06-28 02:35:10,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19194 conditions, 3104 events. 1788/3104 cut-off events. For 133606/133606 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19346 event pairs, 478 based on Foata normal form. 2/3104 useless extension candidates. Maximal degree in co-relation 19105. Up to 2640 conditions per place. [2024-06-28 02:35:10,407 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 67 changer transitions 0/236 dead transitions. [2024-06-28 02:35:10,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 236 transitions, 3189 flow [2024-06-28 02:35:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 02:35:10,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-28 02:35:10,408 INFO L175 Difference]: Start difference. First operand has 191 places, 204 transitions, 2449 flow. Second operand 8 states and 209 transitions. [2024-06-28 02:35:10,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 236 transitions, 3189 flow [2024-06-28 02:35:10,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 236 transitions, 3051 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-28 02:35:10,735 INFO L231 Difference]: Finished difference. Result has 196 places, 204 transitions, 2460 flow [2024-06-28 02:35:10,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2460, PETRI_PLACES=196, PETRI_TRANSITIONS=204} [2024-06-28 02:35:10,736 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-28 02:35:10,736 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 204 transitions, 2460 flow [2024-06-28 02:35:10,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:10,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:10,736 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 02:35:10,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:35:10,736 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:10,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1456342583, now seen corresponding path program 9 times [2024-06-28 02:35:10,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:10,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594467485] [2024-06-28 02:35:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:10,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:10,801 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 02:35:10,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:10,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594467485] [2024-06-28 02:35:10,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594467485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:10,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:10,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237396683] [2024-06-28 02:35:10,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:10,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:10,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:10,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:10,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 204 transitions, 2460 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:10,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:10,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:10,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:11,217 INFO L124 PetriNetUnfolderBase]: 1782/3087 cut-off events. [2024-06-28 02:35:11,217 INFO L125 PetriNetUnfolderBase]: For 135870/135870 co-relation queries the response was YES. [2024-06-28 02:35:11,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19087 conditions, 3087 events. 1782/3087 cut-off events. For 135870/135870 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19217 event pairs, 498 based on Foata normal form. 2/3086 useless extension candidates. Maximal degree in co-relation 18997. Up to 2635 conditions per place. [2024-06-28 02:35:11,246 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 159 selfloop transitions, 57 changer transitions 0/224 dead transitions. [2024-06-28 02:35:11,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 224 transitions, 3046 flow [2024-06-28 02:35:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:35:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:35:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-28 02:35:11,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 02:35:11,247 INFO L175 Difference]: Start difference. First operand has 196 places, 204 transitions, 2460 flow. Second operand 6 states and 156 transitions. [2024-06-28 02:35:11,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 224 transitions, 3046 flow [2024-06-28 02:35:11,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 224 transitions, 2819 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-28 02:35:11,546 INFO L231 Difference]: Finished difference. Result has 193 places, 204 transitions, 2362 flow [2024-06-28 02:35:11,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2362, PETRI_PLACES=193, PETRI_TRANSITIONS=204} [2024-06-28 02:35:11,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-28 02:35:11,547 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 204 transitions, 2362 flow [2024-06-28 02:35:11,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:11,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:11,547 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 02:35:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:35:11,548 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:11,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:11,548 INFO L85 PathProgramCache]: Analyzing trace with hash 996582901, now seen corresponding path program 4 times [2024-06-28 02:35:11,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:11,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255286654] [2024-06-28 02:35:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:11,614 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 02:35:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255286654] [2024-06-28 02:35:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255286654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:11,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:11,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:11,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473011774] [2024-06-28 02:35:11,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:11,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:11,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:11,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:11,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:11,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 204 transitions, 2362 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:11,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:11,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:11,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:12,059 INFO L124 PetriNetUnfolderBase]: 1908/3304 cut-off events. [2024-06-28 02:35:12,059 INFO L125 PetriNetUnfolderBase]: For 159366/159366 co-relation queries the response was YES. [2024-06-28 02:35:12,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21272 conditions, 3304 events. 1908/3304 cut-off events. For 159366/159366 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20864 event pairs, 526 based on Foata normal form. 2/3303 useless extension candidates. Maximal degree in co-relation 21182. Up to 2734 conditions per place. [2024-06-28 02:35:12,090 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 169 selfloop transitions, 59 changer transitions 0/236 dead transitions. [2024-06-28 02:35:12,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 236 transitions, 3125 flow [2024-06-28 02:35:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:35:12,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:35:12,091 INFO L175 Difference]: Start difference. First operand has 193 places, 204 transitions, 2362 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:35:12,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 236 transitions, 3125 flow [2024-06-28 02:35:12,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 236 transitions, 2978 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 02:35:12,470 INFO L231 Difference]: Finished difference. Result has 194 places, 210 transitions, 2483 flow [2024-06-28 02:35:12,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2483, PETRI_PLACES=194, PETRI_TRANSITIONS=210} [2024-06-28 02:35:12,470 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-28 02:35:12,470 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 210 transitions, 2483 flow [2024-06-28 02:35:12,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:12,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:12,471 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 02:35:12,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:35:12,471 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:12,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2121742415, now seen corresponding path program 5 times [2024-06-28 02:35:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113695817] [2024-06-28 02:35:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:12,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:12,548 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 02:35:12,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:12,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113695817] [2024-06-28 02:35:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113695817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:12,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:12,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:12,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811288050] [2024-06-28 02:35:12,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:12,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:12,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:12,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:12,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 210 transitions, 2483 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:12,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:12,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:12,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:13,033 INFO L124 PetriNetUnfolderBase]: 1916/3322 cut-off events. [2024-06-28 02:35:13,034 INFO L125 PetriNetUnfolderBase]: For 160290/160290 co-relation queries the response was YES. [2024-06-28 02:35:13,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21623 conditions, 3322 events. 1916/3322 cut-off events. For 160290/160290 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21068 event pairs, 534 based on Foata normal form. 2/3322 useless extension candidates. Maximal degree in co-relation 21532. Up to 2886 conditions per place. [2024-06-28 02:35:13,064 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 54 changer transitions 0/230 dead transitions. [2024-06-28 02:35:13,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 230 transitions, 3017 flow [2024-06-28 02:35:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 02:35:13,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-28 02:35:13,066 INFO L175 Difference]: Start difference. First operand has 194 places, 210 transitions, 2483 flow. Second operand 7 states and 167 transitions. [2024-06-28 02:35:13,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 230 transitions, 3017 flow [2024-06-28 02:35:13,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 230 transitions, 2870 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:13,445 INFO L231 Difference]: Finished difference. Result has 197 places, 212 transitions, 2499 flow [2024-06-28 02:35:13,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2499, PETRI_PLACES=197, PETRI_TRANSITIONS=212} [2024-06-28 02:35:13,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-28 02:35:13,446 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 212 transitions, 2499 flow [2024-06-28 02:35:13,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:13,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:13,446 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 02:35:13,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:35:13,446 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:13,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1765566543, now seen corresponding path program 6 times [2024-06-28 02:35:13,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:13,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055770939] [2024-06-28 02:35:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:13,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:13,512 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 02:35:13,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:13,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055770939] [2024-06-28 02:35:13,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055770939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:13,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:13,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:13,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147003090] [2024-06-28 02:35:13,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:13,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:13,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:13,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:13,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:13,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:13,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 212 transitions, 2499 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:13,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:13,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:13,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:13,970 INFO L124 PetriNetUnfolderBase]: 1924/3330 cut-off events. [2024-06-28 02:35:13,970 INFO L125 PetriNetUnfolderBase]: For 165349/165349 co-relation queries the response was YES. [2024-06-28 02:35:13,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21647 conditions, 3330 events. 1924/3330 cut-off events. For 165349/165349 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20981 event pairs, 406 based on Foata normal form. 2/3330 useless extension candidates. Maximal degree in co-relation 21555. Up to 1941 conditions per place. [2024-06-28 02:35:14,002 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 159 selfloop transitions, 78 changer transitions 0/245 dead transitions. [2024-06-28 02:35:14,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 245 transitions, 3338 flow [2024-06-28 02:35:14,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:35:14,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-28 02:35:14,003 INFO L175 Difference]: Start difference. First operand has 197 places, 212 transitions, 2499 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:35:14,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 245 transitions, 3338 flow [2024-06-28 02:35:14,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 245 transitions, 3211 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:14,409 INFO L231 Difference]: Finished difference. Result has 199 places, 214 transitions, 2570 flow [2024-06-28 02:35:14,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2570, PETRI_PLACES=199, PETRI_TRANSITIONS=214} [2024-06-28 02:35:14,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-28 02:35:14,410 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 214 transitions, 2570 flow [2024-06-28 02:35:14,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:14,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:14,411 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 02:35:14,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:35:14,411 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:14,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:14,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1776994383, now seen corresponding path program 7 times [2024-06-28 02:35:14,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:14,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139392818] [2024-06-28 02:35:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:14,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:14,478 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 02:35:14,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:14,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139392818] [2024-06-28 02:35:14,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139392818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:14,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:14,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:14,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7443800] [2024-06-28 02:35:14,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:14,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:14,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:14,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:14,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:14,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:14,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 214 transitions, 2570 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:14,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:14,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:14,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:14,958 INFO L124 PetriNetUnfolderBase]: 1899/3283 cut-off events. [2024-06-28 02:35:14,959 INFO L125 PetriNetUnfolderBase]: For 170428/170428 co-relation queries the response was YES. [2024-06-28 02:35:14,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21509 conditions, 3283 events. 1899/3283 cut-off events. For 170428/170428 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20666 event pairs, 444 based on Foata normal form. 8/3289 useless extension candidates. Maximal degree in co-relation 21416. Up to 1927 conditions per place. [2024-06-28 02:35:14,987 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 164 selfloop transitions, 70 changer transitions 0/242 dead transitions. [2024-06-28 02:35:14,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 242 transitions, 3248 flow [2024-06-28 02:35:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 02:35:14,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-28 02:35:14,989 INFO L175 Difference]: Start difference. First operand has 199 places, 214 transitions, 2570 flow. Second operand 7 states and 176 transitions. [2024-06-28 02:35:14,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 242 transitions, 3248 flow [2024-06-28 02:35:15,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 242 transitions, 3024 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:15,341 INFO L231 Difference]: Finished difference. Result has 200 places, 214 transitions, 2492 flow [2024-06-28 02:35:15,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2492, PETRI_PLACES=200, PETRI_TRANSITIONS=214} [2024-06-28 02:35:15,342 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-28 02:35:15,342 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 214 transitions, 2492 flow [2024-06-28 02:35:15,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:15,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:15,343 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 02:35:15,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:35:15,343 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:15,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:15,343 INFO L85 PathProgramCache]: Analyzing trace with hash -894736907, now seen corresponding path program 8 times [2024-06-28 02:35:15,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:15,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186529383] [2024-06-28 02:35:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:15,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:15,412 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 02:35:15,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:15,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186529383] [2024-06-28 02:35:15,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186529383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:15,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:15,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:15,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357809366] [2024-06-28 02:35:15,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:15,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:15,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:15,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:15,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 214 transitions, 2492 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:15,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:15,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:15,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:15,844 INFO L124 PetriNetUnfolderBase]: 1876/3262 cut-off events. [2024-06-28 02:35:15,845 INFO L125 PetriNetUnfolderBase]: For 162406/162406 co-relation queries the response was YES. [2024-06-28 02:35:15,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20482 conditions, 3262 events. 1876/3262 cut-off events. For 162406/162406 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20647 event pairs, 498 based on Foata normal form. 10/3270 useless extension candidates. Maximal degree in co-relation 20390. Up to 2558 conditions per place. [2024-06-28 02:35:15,876 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 174 selfloop transitions, 55 changer transitions 0/237 dead transitions. [2024-06-28 02:35:15,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 237 transitions, 3158 flow [2024-06-28 02:35:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:35:15,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-28 02:35:15,877 INFO L175 Difference]: Start difference. First operand has 200 places, 214 transitions, 2492 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:35:15,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 237 transitions, 3158 flow [2024-06-28 02:35:16,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 237 transitions, 3000 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:16,242 INFO L231 Difference]: Finished difference. Result has 201 places, 214 transitions, 2451 flow [2024-06-28 02:35:16,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2451, PETRI_PLACES=201, PETRI_TRANSITIONS=214} [2024-06-28 02:35:16,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-28 02:35:16,243 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 214 transitions, 2451 flow [2024-06-28 02:35:16,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:16,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:16,243 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 02:35:16,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:35:16,243 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:16,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash 218994767, now seen corresponding path program 9 times [2024-06-28 02:35:16,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:16,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420528446] [2024-06-28 02:35:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:16,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:16,312 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 02:35:16,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:16,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420528446] [2024-06-28 02:35:16,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420528446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:16,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:16,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:16,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552475922] [2024-06-28 02:35:16,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:16,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:16,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:16,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:16,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:16,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:16,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 214 transitions, 2451 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:16,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:16,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:16,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:16,735 INFO L124 PetriNetUnfolderBase]: 1846/3216 cut-off events. [2024-06-28 02:35:16,736 INFO L125 PetriNetUnfolderBase]: For 151216/151216 co-relation queries the response was YES. [2024-06-28 02:35:16,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19521 conditions, 3216 events. 1846/3216 cut-off events. For 151216/151216 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20395 event pairs, 504 based on Foata normal form. 10/3224 useless extension candidates. Maximal degree in co-relation 19428. Up to 2748 conditions per place. [2024-06-28 02:35:16,766 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 174 selfloop transitions, 50 changer transitions 0/232 dead transitions. [2024-06-28 02:35:16,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 232 transitions, 2965 flow [2024-06-28 02:35:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-28 02:35:16,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:35:16,768 INFO L175 Difference]: Start difference. First operand has 201 places, 214 transitions, 2451 flow. Second operand 7 states and 168 transitions. [2024-06-28 02:35:16,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 232 transitions, 2965 flow [2024-06-28 02:35:17,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 232 transitions, 2850 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:17,263 INFO L231 Difference]: Finished difference. Result has 204 places, 214 transitions, 2442 flow [2024-06-28 02:35:17,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2442, PETRI_PLACES=204, PETRI_TRANSITIONS=214} [2024-06-28 02:35:17,264 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-28 02:35:17,264 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 214 transitions, 2442 flow [2024-06-28 02:35:17,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:17,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:17,264 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 02:35:17,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:35:17,264 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:17,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:17,265 INFO L85 PathProgramCache]: Analyzing trace with hash -787481231, now seen corresponding path program 10 times [2024-06-28 02:35:17,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:17,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005428753] [2024-06-28 02:35:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:17,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:17,337 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 02:35:17,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:17,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005428753] [2024-06-28 02:35:17,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005428753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:17,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:17,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084871536] [2024-06-28 02:35:17,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:17,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:17,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:17,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:17,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 214 transitions, 2442 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:17,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:17,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:17,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:17,809 INFO L124 PetriNetUnfolderBase]: 1823/3180 cut-off events. [2024-06-28 02:35:17,809 INFO L125 PetriNetUnfolderBase]: For 139065/139065 co-relation queries the response was YES. [2024-06-28 02:35:17,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18655 conditions, 3180 events. 1823/3180 cut-off events. For 139065/139065 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20127 event pairs, 474 based on Foata normal form. 10/3186 useless extension candidates. Maximal degree in co-relation 18561. Up to 2589 conditions per place. [2024-06-28 02:35:17,838 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 184 selfloop transitions, 58 changer transitions 0/250 dead transitions. [2024-06-28 02:35:17,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 250 transitions, 3048 flow [2024-06-28 02:35:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 02:35:17,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-28 02:35:17,840 INFO L175 Difference]: Start difference. First operand has 204 places, 214 transitions, 2442 flow. Second operand 8 states and 209 transitions. [2024-06-28 02:35:17,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 250 transitions, 3048 flow [2024-06-28 02:35:18,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 250 transitions, 2896 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 02:35:18,204 INFO L231 Difference]: Finished difference. Result has 205 places, 214 transitions, 2421 flow [2024-06-28 02:35:18,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2421, PETRI_PLACES=205, PETRI_TRANSITIONS=214} [2024-06-28 02:35:18,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-28 02:35:18,205 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 214 transitions, 2421 flow [2024-06-28 02:35:18,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:18,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:18,205 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 02:35:18,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:35:18,205 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:18,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -559580081, now seen corresponding path program 11 times [2024-06-28 02:35:18,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:18,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274478399] [2024-06-28 02:35:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:18,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:18,284 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 02:35:18,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:18,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274478399] [2024-06-28 02:35:18,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274478399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:18,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:18,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:18,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188659004] [2024-06-28 02:35:18,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:18,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:18,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:18,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 214 transitions, 2421 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:18,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:18,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:18,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:18,702 INFO L124 PetriNetUnfolderBase]: 1800/3140 cut-off events. [2024-06-28 02:35:18,703 INFO L125 PetriNetUnfolderBase]: For 125510/125510 co-relation queries the response was YES. [2024-06-28 02:35:18,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17851 conditions, 3140 events. 1800/3140 cut-off events. For 125510/125510 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19913 event pairs, 489 based on Foata normal form. 10/3147 useless extension candidates. Maximal degree in co-relation 17756. Up to 2654 conditions per place. [2024-06-28 02:35:18,729 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 181 selfloop transitions, 48 changer transitions 0/237 dead transitions. [2024-06-28 02:35:18,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 237 transitions, 2959 flow [2024-06-28 02:35:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:35:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:35:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:35:18,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6541666666666667 [2024-06-28 02:35:18,752 INFO L175 Difference]: Start difference. First operand has 205 places, 214 transitions, 2421 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:35:18,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 237 transitions, 2959 flow [2024-06-28 02:35:19,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 237 transitions, 2838 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:19,172 INFO L231 Difference]: Finished difference. Result has 205 places, 214 transitions, 2405 flow [2024-06-28 02:35:19,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2300, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2405, PETRI_PLACES=205, PETRI_TRANSITIONS=214} [2024-06-28 02:35:19,173 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-28 02:35:19,173 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 214 transitions, 2405 flow [2024-06-28 02:35:19,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:19,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:19,174 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 02:35:19,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 02:35:19,174 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:19,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:19,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1456588537, now seen corresponding path program 12 times [2024-06-28 02:35:19,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:19,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050643146] [2024-06-28 02:35:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:19,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:19,276 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 02:35:19,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:19,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050643146] [2024-06-28 02:35:19,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050643146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:19,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:19,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:19,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613752802] [2024-06-28 02:35:19,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:19,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:19,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:19,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:19,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:19,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:19,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 214 transitions, 2405 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:19,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:19,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:19,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:19,696 INFO L124 PetriNetUnfolderBase]: 1770/3089 cut-off events. [2024-06-28 02:35:19,696 INFO L125 PetriNetUnfolderBase]: For 108289/108289 co-relation queries the response was YES. [2024-06-28 02:35:19,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16926 conditions, 3089 events. 1770/3089 cut-off events. For 108289/108289 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19543 event pairs, 376 based on Foata normal form. 10/3096 useless extension candidates. Maximal degree in co-relation 16830. Up to 2139 conditions per place. [2024-06-28 02:35:19,723 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 175 selfloop transitions, 60 changer transitions 0/243 dead transitions. [2024-06-28 02:35:19,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 243 transitions, 3001 flow [2024-06-28 02:35:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:35:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:35:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-28 02:35:19,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-28 02:35:19,726 INFO L175 Difference]: Start difference. First operand has 205 places, 214 transitions, 2405 flow. Second operand 6 states and 162 transitions. [2024-06-28 02:35:19,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 243 transitions, 3001 flow [2024-06-28 02:35:20,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 243 transitions, 2882 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:20,128 INFO L231 Difference]: Finished difference. Result has 206 places, 214 transitions, 2417 flow [2024-06-28 02:35:20,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2417, PETRI_PLACES=206, PETRI_TRANSITIONS=214} [2024-06-28 02:35:20,128 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-28 02:35:20,128 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 214 transitions, 2417 flow [2024-06-28 02:35:20,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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 02:35:20,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:20,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:20,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 02:35:20,129 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:20,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:20,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1636320359, now seen corresponding path program 1 times [2024-06-28 02:35:20,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:20,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497671269] [2024-06-28 02:35:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:20,234 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 02:35:20,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:20,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497671269] [2024-06-28 02:35:20,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497671269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:20,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:20,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:20,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98993255] [2024-06-28 02:35:20,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:20,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:20,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:20,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:20,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:20,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:20,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 214 transitions, 2417 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:20,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:20,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:20,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:20,630 INFO L124 PetriNetUnfolderBase]: 1775/3098 cut-off events. [2024-06-28 02:35:20,630 INFO L125 PetriNetUnfolderBase]: For 97263/97263 co-relation queries the response was YES. [2024-06-28 02:35:20,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17114 conditions, 3098 events. 1775/3098 cut-off events. For 97263/97263 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19594 event pairs, 483 based on Foata normal form. 1/3096 useless extension candidates. Maximal degree in co-relation 17017. Up to 2640 conditions per place. [2024-06-28 02:35:20,658 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 61 changer transitions 0/230 dead transitions. [2024-06-28 02:35:20,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 230 transitions, 2929 flow [2024-06-28 02:35:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:35:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:35:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 02:35:20,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:35:20,659 INFO L175 Difference]: Start difference. First operand has 206 places, 214 transitions, 2417 flow. Second operand 6 states and 150 transitions. [2024-06-28 02:35:20,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 230 transitions, 2929 flow [2024-06-28 02:35:21,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 230 transitions, 2725 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 02:35:21,049 INFO L231 Difference]: Finished difference. Result has 205 places, 217 transitions, 2391 flow [2024-06-28 02:35:21,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2391, PETRI_PLACES=205, PETRI_TRANSITIONS=217} [2024-06-28 02:35:21,049 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-28 02:35:21,050 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 217 transitions, 2391 flow [2024-06-28 02:35:21,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:21,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:21,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:21,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 02:35:21,050 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:21,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:21,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1716249121, now seen corresponding path program 2 times [2024-06-28 02:35:21,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:21,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049557314] [2024-06-28 02:35:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:21,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:21,124 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 02:35:21,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049557314] [2024-06-28 02:35:21,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049557314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:21,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:21,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:21,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970406049] [2024-06-28 02:35:21,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:21,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:21,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:21,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:21,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:21,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:21,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 217 transitions, 2391 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:21,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:21,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:21,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:21,512 INFO L124 PetriNetUnfolderBase]: 1780/3107 cut-off events. [2024-06-28 02:35:21,512 INFO L125 PetriNetUnfolderBase]: For 97596/97596 co-relation queries the response was YES. [2024-06-28 02:35:21,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16872 conditions, 3107 events. 1780/3107 cut-off events. For 97596/97596 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19689 event pairs, 483 based on Foata normal form. 1/3105 useless extension candidates. Maximal degree in co-relation 16774. Up to 2569 conditions per place. [2024-06-28 02:35:21,542 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 143 selfloop transitions, 87 changer transitions 0/238 dead transitions. [2024-06-28 02:35:21,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 238 transitions, 3055 flow [2024-06-28 02:35:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 02:35:21,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-28 02:35:21,543 INFO L175 Difference]: Start difference. First operand has 205 places, 217 transitions, 2391 flow. Second operand 7 states and 170 transitions. [2024-06-28 02:35:21,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 238 transitions, 3055 flow [2024-06-28 02:35:22,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 238 transitions, 2919 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:22,060 INFO L231 Difference]: Finished difference. Result has 207 places, 220 transitions, 2480 flow [2024-06-28 02:35:22,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2480, PETRI_PLACES=207, PETRI_TRANSITIONS=220} [2024-06-28 02:35:22,061 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-28 02:35:22,061 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 220 transitions, 2480 flow [2024-06-28 02:35:22,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:22,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:22,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:22,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 02:35:22,062 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:22,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash 35602363, now seen corresponding path program 3 times [2024-06-28 02:35:22,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:22,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446666651] [2024-06-28 02:35:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:22,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:22,125 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 02:35:22,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:22,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446666651] [2024-06-28 02:35:22,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446666651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:22,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:22,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:22,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366589613] [2024-06-28 02:35:22,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:22,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:22,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:22,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:22,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:22,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 220 transitions, 2480 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:22,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:22,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:22,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:22,542 INFO L124 PetriNetUnfolderBase]: 1785/3116 cut-off events. [2024-06-28 02:35:22,542 INFO L125 PetriNetUnfolderBase]: For 98094/98094 co-relation queries the response was YES. [2024-06-28 02:35:22,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16996 conditions, 3116 events. 1785/3116 cut-off events. For 98094/98094 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 19724 event pairs, 483 based on Foata normal form. 1/3114 useless extension candidates. Maximal degree in co-relation 16898. Up to 2575 conditions per place. [2024-06-28 02:35:22,572 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 143 selfloop transitions, 88 changer transitions 0/239 dead transitions. [2024-06-28 02:35:22,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 239 transitions, 3264 flow [2024-06-28 02:35:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:22,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 02:35:22,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-28 02:35:22,573 INFO L175 Difference]: Start difference. First operand has 207 places, 220 transitions, 2480 flow. Second operand 7 states and 170 transitions. [2024-06-28 02:35:22,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 239 transitions, 3264 flow [2024-06-28 02:35:23,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 239 transitions, 3048 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:23,027 INFO L231 Difference]: Finished difference. Result has 209 places, 223 transitions, 2496 flow [2024-06-28 02:35:23,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2496, PETRI_PLACES=209, PETRI_TRANSITIONS=223} [2024-06-28 02:35:23,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-28 02:35:23,028 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 223 transitions, 2496 flow [2024-06-28 02:35:23,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:23,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:23,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:23,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 02:35:23,029 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:23,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1911905921, now seen corresponding path program 4 times [2024-06-28 02:35:23,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:23,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985246673] [2024-06-28 02:35:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:23,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:23,089 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 02:35:23,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:23,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985246673] [2024-06-28 02:35:23,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985246673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:23,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:23,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:23,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817056560] [2024-06-28 02:35:23,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:23,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:23,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:23,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:23,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:23,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 223 transitions, 2496 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:23,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:23,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:23,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:23,488 INFO L124 PetriNetUnfolderBase]: 1782/3112 cut-off events. [2024-06-28 02:35:23,488 INFO L125 PetriNetUnfolderBase]: For 99099/99099 co-relation queries the response was YES. [2024-06-28 02:35:23,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16822 conditions, 3112 events. 1782/3112 cut-off events. For 99099/99099 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 19674 event pairs, 483 based on Foata normal form. 1/3110 useless extension candidates. Maximal degree in co-relation 16724. Up to 2572 conditions per place. [2024-06-28 02:35:23,517 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 137 selfloop transitions, 93 changer transitions 0/238 dead transitions. [2024-06-28 02:35:23,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 238 transitions, 3112 flow [2024-06-28 02:35:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 02:35:23,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-28 02:35:23,519 INFO L175 Difference]: Start difference. First operand has 209 places, 223 transitions, 2496 flow. Second operand 7 states and 170 transitions. [2024-06-28 02:35:23,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 238 transitions, 3112 flow [2024-06-28 02:35:23,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 238 transitions, 2923 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:23,902 INFO L231 Difference]: Finished difference. Result has 212 places, 223 transitions, 2499 flow [2024-06-28 02:35:23,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2499, PETRI_PLACES=212, PETRI_TRANSITIONS=223} [2024-06-28 02:35:23,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-28 02:35:23,903 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 223 transitions, 2499 flow [2024-06-28 02:35:23,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:23,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:23,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:23,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 02:35:23,904 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:23,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:23,904 INFO L85 PathProgramCache]: Analyzing trace with hash 449925653, now seen corresponding path program 5 times [2024-06-28 02:35:23,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:23,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734146405] [2024-06-28 02:35:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:23,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:23,965 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 02:35:23,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:23,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734146405] [2024-06-28 02:35:23,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734146405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:23,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:23,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:23,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886135152] [2024-06-28 02:35:23,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:23,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:23,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:23,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:23,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 223 transitions, 2499 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:23,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:23,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:23,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:24,369 INFO L124 PetriNetUnfolderBase]: 1787/3121 cut-off events. [2024-06-28 02:35:24,370 INFO L125 PetriNetUnfolderBase]: For 101958/101958 co-relation queries the response was YES. [2024-06-28 02:35:24,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16908 conditions, 3121 events. 1787/3121 cut-off events. For 101958/101958 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 19812 event pairs, 481 based on Foata normal form. 1/3119 useless extension candidates. Maximal degree in co-relation 16809. Up to 2642 conditions per place. [2024-06-28 02:35:24,398 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 168 selfloop transitions, 66 changer transitions 0/242 dead transitions. [2024-06-28 02:35:24,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 242 transitions, 3170 flow [2024-06-28 02:35:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-28 02:35:24,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-28 02:35:24,400 INFO L175 Difference]: Start difference. First operand has 212 places, 223 transitions, 2499 flow. Second operand 8 states and 187 transitions. [2024-06-28 02:35:24,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 242 transitions, 3170 flow [2024-06-28 02:35:24,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 242 transitions, 2806 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 02:35:24,850 INFO L231 Difference]: Finished difference. Result has 211 places, 226 transitions, 2316 flow [2024-06-28 02:35:24,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2316, PETRI_PLACES=211, PETRI_TRANSITIONS=226} [2024-06-28 02:35:24,851 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-28 02:35:24,851 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 226 transitions, 2316 flow [2024-06-28 02:35:24,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:24,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:24,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:24,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 02:35:24,852 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:24,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash 250623863, now seen corresponding path program 6 times [2024-06-28 02:35:24,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:24,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957737971] [2024-06-28 02:35:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:24,938 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 02:35:24,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:24,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957737971] [2024-06-28 02:35:24,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957737971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:24,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:24,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:24,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292274086] [2024-06-28 02:35:24,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:24,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:24,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:24,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:24,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:24,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 226 transitions, 2316 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:24,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:24,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:24,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:25,332 INFO L124 PetriNetUnfolderBase]: 1792/3130 cut-off events. [2024-06-28 02:35:25,333 INFO L125 PetriNetUnfolderBase]: For 103514/103514 co-relation queries the response was YES. [2024-06-28 02:35:25,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16836 conditions, 3130 events. 1792/3130 cut-off events. For 103514/103514 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19883 event pairs, 483 based on Foata normal form. 1/3128 useless extension candidates. Maximal degree in co-relation 16737. Up to 2648 conditions per place. [2024-06-28 02:35:25,361 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 171 selfloop transitions, 64 changer transitions 0/243 dead transitions. [2024-06-28 02:35:25,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 243 transitions, 2981 flow [2024-06-28 02:35:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:35:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:35:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:35:25,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-28 02:35:25,363 INFO L175 Difference]: Start difference. First operand has 211 places, 226 transitions, 2316 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:35:25,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 243 transitions, 2981 flow [2024-06-28 02:35:25,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 243 transitions, 2810 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:25,859 INFO L231 Difference]: Finished difference. Result has 211 places, 229 transitions, 2316 flow [2024-06-28 02:35:25,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2316, PETRI_PLACES=211, PETRI_TRANSITIONS=229} [2024-06-28 02:35:25,860 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-28 02:35:25,860 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 229 transitions, 2316 flow [2024-06-28 02:35:25,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:25,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:25,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:25,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 02:35:25,860 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:25,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:25,861 INFO L85 PathProgramCache]: Analyzing trace with hash 250267673, now seen corresponding path program 7 times [2024-06-28 02:35:25,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:25,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638742064] [2024-06-28 02:35:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:25,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:25,941 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 02:35:25,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:25,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638742064] [2024-06-28 02:35:25,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638742064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:25,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:25,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954357402] [2024-06-28 02:35:25,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:25,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:25,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:25,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:25,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 229 transitions, 2316 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:25,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:25,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:25,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:26,354 INFO L124 PetriNetUnfolderBase]: 1789/3126 cut-off events. [2024-06-28 02:35:26,355 INFO L125 PetriNetUnfolderBase]: For 104272/104272 co-relation queries the response was YES. [2024-06-28 02:35:26,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16764 conditions, 3126 events. 1789/3126 cut-off events. For 104272/104272 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19877 event pairs, 483 based on Foata normal form. 1/3124 useless extension candidates. Maximal degree in co-relation 16664. Up to 2645 conditions per place. [2024-06-28 02:35:26,384 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 172 selfloop transitions, 65 changer transitions 0/245 dead transitions. [2024-06-28 02:35:26,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 245 transitions, 2830 flow [2024-06-28 02:35:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:35:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:35:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 02:35:26,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:35:26,385 INFO L175 Difference]: Start difference. First operand has 211 places, 229 transitions, 2316 flow. Second operand 6 states and 150 transitions. [2024-06-28 02:35:26,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 245 transitions, 2830 flow [2024-06-28 02:35:26,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 245 transitions, 2680 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:26,875 INFO L231 Difference]: Finished difference. Result has 213 places, 229 transitions, 2304 flow [2024-06-28 02:35:26,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2304, PETRI_PLACES=213, PETRI_TRANSITIONS=229} [2024-06-28 02:35:26,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-28 02:35:26,876 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 229 transitions, 2304 flow [2024-06-28 02:35:26,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:26,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:26,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:26,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 02:35:26,876 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:26,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:26,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1724978375, now seen corresponding path program 1 times [2024-06-28 02:35:26,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:26,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615991686] [2024-06-28 02:35:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:26,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:26,950 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 02:35:26,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615991686] [2024-06-28 02:35:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615991686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:26,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:26,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774576745] [2024-06-28 02:35:26,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:26,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:26,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:26,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 229 transitions, 2304 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:26,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:26,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:26,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:27,410 INFO L124 PetriNetUnfolderBase]: 1809/3156 cut-off events. [2024-06-28 02:35:27,411 INFO L125 PetriNetUnfolderBase]: For 117460/117460 co-relation queries the response was YES. [2024-06-28 02:35:27,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16945 conditions, 3156 events. 1809/3156 cut-off events. For 117460/117460 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 19980 event pairs, 369 based on Foata normal form. 6/3159 useless extension candidates. Maximal degree in co-relation 16844. Up to 2568 conditions per place. [2024-06-28 02:35:27,434 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 222 selfloop transitions, 23 changer transitions 0/253 dead transitions. [2024-06-28 02:35:27,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 253 transitions, 3027 flow [2024-06-28 02:35:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:35:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:35:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:35:27,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-28 02:35:27,435 INFO L175 Difference]: Start difference. First operand has 213 places, 229 transitions, 2304 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:35:27,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 253 transitions, 3027 flow [2024-06-28 02:35:27,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 253 transitions, 2842 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:27,892 INFO L231 Difference]: Finished difference. Result has 213 places, 230 transitions, 2182 flow [2024-06-28 02:35:27,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2182, PETRI_PLACES=213, PETRI_TRANSITIONS=230} [2024-06-28 02:35:27,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-28 02:35:27,894 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 230 transitions, 2182 flow [2024-06-28 02:35:27,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:27,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:27,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:27,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 02:35:27,894 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:27,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash -635242223, now seen corresponding path program 2 times [2024-06-28 02:35:27,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:27,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483309945] [2024-06-28 02:35:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:27,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:27,965 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 02:35:27,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:27,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483309945] [2024-06-28 02:35:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483309945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:27,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:27,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:27,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789355620] [2024-06-28 02:35:27,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:27,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:27,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:27,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:27,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 230 transitions, 2182 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:27,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:27,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:27,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:28,362 INFO L124 PetriNetUnfolderBase]: 1796/3137 cut-off events. [2024-06-28 02:35:28,362 INFO L125 PetriNetUnfolderBase]: For 108125/108125 co-relation queries the response was YES. [2024-06-28 02:35:28,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16449 conditions, 3137 events. 1796/3137 cut-off events. For 108125/108125 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 19848 event pairs, 358 based on Foata normal form. 6/3140 useless extension candidates. Maximal degree in co-relation 16347. Up to 2562 conditions per place. [2024-06-28 02:35:28,389 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 218 selfloop transitions, 23 changer transitions 1/250 dead transitions. [2024-06-28 02:35:28,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 250 transitions, 2752 flow [2024-06-28 02:35:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:35:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:35:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-28 02:35:28,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-28 02:35:28,391 INFO L175 Difference]: Start difference. First operand has 213 places, 230 transitions, 2182 flow. Second operand 5 states and 128 transitions. [2024-06-28 02:35:28,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 250 transitions, 2752 flow [2024-06-28 02:35:28,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 250 transitions, 2696 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 02:35:28,849 INFO L231 Difference]: Finished difference. Result has 215 places, 230 transitions, 2178 flow [2024-06-28 02:35:28,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2178, PETRI_PLACES=215, PETRI_TRANSITIONS=230} [2024-06-28 02:35:28,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-28 02:35:28,850 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 230 transitions, 2178 flow [2024-06-28 02:35:28,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:28,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:28,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:28,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 02:35:28,851 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:28,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:28,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1251364619, now seen corresponding path program 1 times [2024-06-28 02:35:28,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:28,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894801088] [2024-06-28 02:35:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:28,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:28,920 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 02:35:28,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:28,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894801088] [2024-06-28 02:35:28,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894801088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:28,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:28,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:28,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763584917] [2024-06-28 02:35:28,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:28,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:28,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:28,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:28,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 230 transitions, 2178 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:28,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:28,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:28,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:29,403 INFO L124 PetriNetUnfolderBase]: 1816/3182 cut-off events. [2024-06-28 02:35:29,404 INFO L125 PetriNetUnfolderBase]: For 111876/111876 co-relation queries the response was YES. [2024-06-28 02:35:29,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16608 conditions, 3182 events. 1816/3182 cut-off events. For 111876/111876 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 20262 event pairs, 321 based on Foata normal form. 6/3184 useless extension candidates. Maximal degree in co-relation 16506. Up to 2247 conditions per place. [2024-06-28 02:35:29,433 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 70 changer transitions 1/274 dead transitions. [2024-06-28 02:35:29,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 274 transitions, 2910 flow [2024-06-28 02:35:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-28 02:35:29,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665625 [2024-06-28 02:35:29,435 INFO L175 Difference]: Start difference. First operand has 215 places, 230 transitions, 2178 flow. Second operand 8 states and 213 transitions. [2024-06-28 02:35:29,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 274 transitions, 2910 flow [2024-06-28 02:35:29,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 274 transitions, 2837 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:29,936 INFO L231 Difference]: Finished difference. Result has 218 places, 233 transitions, 2329 flow [2024-06-28 02:35:29,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2329, PETRI_PLACES=218, PETRI_TRANSITIONS=233} [2024-06-28 02:35:29,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-28 02:35:29,937 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 233 transitions, 2329 flow [2024-06-28 02:35:29,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:29,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:29,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:29,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 02:35:29,938 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:29,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:29,938 INFO L85 PathProgramCache]: Analyzing trace with hash -402144617, now seen corresponding path program 2 times [2024-06-28 02:35:29,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:29,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654562002] [2024-06-28 02:35:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:29,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:30,012 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 02:35:30,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:30,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654562002] [2024-06-28 02:35:30,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654562002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:30,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:30,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:30,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036677554] [2024-06-28 02:35:30,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:30,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:30,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:30,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:30,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:30,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:30,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 233 transitions, 2329 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:30,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:30,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:30,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:30,550 INFO L124 PetriNetUnfolderBase]: 1917/3360 cut-off events. [2024-06-28 02:35:30,551 INFO L125 PetriNetUnfolderBase]: For 146809/146809 co-relation queries the response was YES. [2024-06-28 02:35:30,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18749 conditions, 3360 events. 1917/3360 cut-off events. For 146809/146809 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 21535 event pairs, 330 based on Foata normal form. 6/3363 useless extension candidates. Maximal degree in co-relation 18647. Up to 1779 conditions per place. [2024-06-28 02:35:30,585 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 191 selfloop transitions, 71 changer transitions 0/270 dead transitions. [2024-06-28 02:35:30,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 270 transitions, 3292 flow [2024-06-28 02:35:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-28 02:35:30,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-06-28 02:35:30,586 INFO L175 Difference]: Start difference. First operand has 218 places, 233 transitions, 2329 flow. Second operand 7 states and 186 transitions. [2024-06-28 02:35:30,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 270 transitions, 3292 flow [2024-06-28 02:35:31,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 270 transitions, 3199 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:31,157 INFO L231 Difference]: Finished difference. Result has 221 places, 235 transitions, 2426 flow [2024-06-28 02:35:31,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2426, PETRI_PLACES=221, PETRI_TRANSITIONS=235} [2024-06-28 02:35:31,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-28 02:35:31,157 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 235 transitions, 2426 flow [2024-06-28 02:35:31,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:31,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:31,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:31,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 02:35:31,158 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:31,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:31,158 INFO L85 PathProgramCache]: Analyzing trace with hash -401907467, now seen corresponding path program 3 times [2024-06-28 02:35:31,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:31,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598548371] [2024-06-28 02:35:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:31,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:31,226 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 02:35:31,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:31,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598548371] [2024-06-28 02:35:31,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598548371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:31,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:31,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:35:31,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949943947] [2024-06-28 02:35:31,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:31,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:35:31,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:31,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:35:31,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:35:31,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:31,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 235 transitions, 2426 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:31,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:31,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:31,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:31,695 INFO L124 PetriNetUnfolderBase]: 1904/3346 cut-off events. [2024-06-28 02:35:31,695 INFO L125 PetriNetUnfolderBase]: For 136632/136632 co-relation queries the response was YES. [2024-06-28 02:35:31,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18658 conditions, 3346 events. 1904/3346 cut-off events. For 136632/136632 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 21487 event pairs, 287 based on Foata normal form. 6/3349 useless extension candidates. Maximal degree in co-relation 18554. Up to 1773 conditions per place. [2024-06-28 02:35:31,727 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 194 selfloop transitions, 69 changer transitions 0/271 dead transitions. [2024-06-28 02:35:31,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 271 transitions, 3257 flow [2024-06-28 02:35:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:35:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:35:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-28 02:35:31,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-06-28 02:35:31,728 INFO L175 Difference]: Start difference. First operand has 221 places, 235 transitions, 2426 flow. Second operand 7 states and 186 transitions. [2024-06-28 02:35:31,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 271 transitions, 3257 flow [2024-06-28 02:35:32,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 271 transitions, 3030 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:32,411 INFO L231 Difference]: Finished difference. Result has 222 places, 236 transitions, 2362 flow [2024-06-28 02:35:32,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2208, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2362, PETRI_PLACES=222, PETRI_TRANSITIONS=236} [2024-06-28 02:35:32,412 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-28 02:35:32,412 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 236 transitions, 2362 flow [2024-06-28 02:35:32,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:35:32,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:32,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:32,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 02:35:32,413 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:32,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1934905830, now seen corresponding path program 1 times [2024-06-28 02:35:32,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:32,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281697963] [2024-06-28 02:35:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:32,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:32,488 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 02:35:32,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:32,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281697963] [2024-06-28 02:35:32,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281697963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:32,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:32,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:32,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108310740] [2024-06-28 02:35:32,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:32,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:32,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:32,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:32,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 236 transitions, 2362 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:32,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:32,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:32,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:33,015 INFO L124 PetriNetUnfolderBase]: 2003/3502 cut-off events. [2024-06-28 02:35:33,015 INFO L125 PetriNetUnfolderBase]: For 172493/172493 co-relation queries the response was YES. [2024-06-28 02:35:33,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20294 conditions, 3502 events. 2003/3502 cut-off events. For 172493/172493 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22555 event pairs, 418 based on Foata normal form. 6/3503 useless extension candidates. Maximal degree in co-relation 20191. Up to 2613 conditions per place. [2024-06-28 02:35:33,048 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 243 selfloop transitions, 34 changer transitions 4/289 dead transitions. [2024-06-28 02:35:33,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 289 transitions, 3458 flow [2024-06-28 02:35:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:35:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:35:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-28 02:35:33,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-28 02:35:33,049 INFO L175 Difference]: Start difference. First operand has 222 places, 236 transitions, 2362 flow. Second operand 9 states and 230 transitions. [2024-06-28 02:35:33,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 289 transitions, 3458 flow [2024-06-28 02:35:33,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 289 transitions, 3362 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:33,565 INFO L231 Difference]: Finished difference. Result has 227 places, 239 transitions, 2418 flow [2024-06-28 02:35:33,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2418, PETRI_PLACES=227, PETRI_TRANSITIONS=239} [2024-06-28 02:35:33,566 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-28 02:35:33,566 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 239 transitions, 2418 flow [2024-06-28 02:35:33,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:33,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:33,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 02:35:33,567 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:33,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:33,567 INFO L85 PathProgramCache]: Analyzing trace with hash 592846132, now seen corresponding path program 2 times [2024-06-28 02:35:33,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:33,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498059399] [2024-06-28 02:35:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:33,648 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 02:35:33,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:33,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498059399] [2024-06-28 02:35:33,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498059399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:33,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:33,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:33,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044192275] [2024-06-28 02:35:33,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:33,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:33,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:33,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:33,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:33,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:33,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 239 transitions, 2418 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:33,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:33,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:33,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:34,160 INFO L124 PetriNetUnfolderBase]: 1909/3345 cut-off events. [2024-06-28 02:35:34,161 INFO L125 PetriNetUnfolderBase]: For 122491/122491 co-relation queries the response was YES. [2024-06-28 02:35:34,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17994 conditions, 3345 events. 1909/3345 cut-off events. For 122491/122491 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21434 event pairs, 413 based on Foata normal form. 6/3349 useless extension candidates. Maximal degree in co-relation 17890. Up to 2863 conditions per place. [2024-06-28 02:35:34,193 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 237 selfloop transitions, 26 changer transitions 2/273 dead transitions. [2024-06-28 02:35:34,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 273 transitions, 3054 flow [2024-06-28 02:35:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 02:35:34,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-28 02:35:34,194 INFO L175 Difference]: Start difference. First operand has 227 places, 239 transitions, 2418 flow. Second operand 8 states and 195 transitions. [2024-06-28 02:35:34,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 273 transitions, 3054 flow [2024-06-28 02:35:34,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 273 transitions, 2983 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:34,687 INFO L231 Difference]: Finished difference. Result has 231 places, 239 transitions, 2403 flow [2024-06-28 02:35:34,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2403, PETRI_PLACES=231, PETRI_TRANSITIONS=239} [2024-06-28 02:35:34,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-28 02:35:34,688 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 239 transitions, 2403 flow [2024-06-28 02:35:34,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:34,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:34,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 02:35:34,688 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:34,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -829797434, now seen corresponding path program 3 times [2024-06-28 02:35:34,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:34,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136083790] [2024-06-28 02:35:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:34,769 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 02:35:34,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:34,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136083790] [2024-06-28 02:35:34,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136083790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:34,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:34,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:34,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319653904] [2024-06-28 02:35:34,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:34,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:34,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:34,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:34,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:34,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:34,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 239 transitions, 2403 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:34,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:34,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:34,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:35,302 INFO L124 PetriNetUnfolderBase]: 1937/3387 cut-off events. [2024-06-28 02:35:35,302 INFO L125 PetriNetUnfolderBase]: For 131458/131458 co-relation queries the response was YES. [2024-06-28 02:35:35,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18168 conditions, 3387 events. 1937/3387 cut-off events. For 131458/131458 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21796 event pairs, 497 based on Foata normal form. 8/3391 useless extension candidates. Maximal degree in co-relation 18062. Up to 2801 conditions per place. [2024-06-28 02:35:35,336 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 243 selfloop transitions, 28 changer transitions 0/279 dead transitions. [2024-06-28 02:35:35,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 279 transitions, 3249 flow [2024-06-28 02:35:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-28 02:35:35,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-28 02:35:35,339 INFO L175 Difference]: Start difference. First operand has 231 places, 239 transitions, 2403 flow. Second operand 8 states and 201 transitions. [2024-06-28 02:35:35,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 279 transitions, 3249 flow [2024-06-28 02:35:35,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 279 transitions, 3178 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 02:35:35,835 INFO L231 Difference]: Finished difference. Result has 231 places, 240 transitions, 2414 flow [2024-06-28 02:35:35,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2414, PETRI_PLACES=231, PETRI_TRANSITIONS=240} [2024-06-28 02:35:35,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-28 02:35:35,836 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 240 transitions, 2414 flow [2024-06-28 02:35:35,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:35,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:35,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:35,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 02:35:35,836 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:35,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:35,837 INFO L85 PathProgramCache]: Analyzing trace with hash -687485114, now seen corresponding path program 4 times [2024-06-28 02:35:35,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:35,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960370353] [2024-06-28 02:35:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:35,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:35,915 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 02:35:35,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:35,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960370353] [2024-06-28 02:35:35,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960370353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:35,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:35,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:35,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847179104] [2024-06-28 02:35:35,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:35,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:35,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:35,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:35,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:35,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:35,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 240 transitions, 2414 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:35,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:35,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:35,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:36,444 INFO L124 PetriNetUnfolderBase]: 1919/3363 cut-off events. [2024-06-28 02:35:36,445 INFO L125 PetriNetUnfolderBase]: For 115508/115508 co-relation queries the response was YES. [2024-06-28 02:35:36,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17459 conditions, 3363 events. 1919/3363 cut-off events. For 115508/115508 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21659 event pairs, 507 based on Foata normal form. 8/3369 useless extension candidates. Maximal degree in co-relation 17352. Up to 2929 conditions per place. [2024-06-28 02:35:36,473 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 236 selfloop transitions, 27 changer transitions 0/271 dead transitions. [2024-06-28 02:35:36,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 271 transitions, 3042 flow [2024-06-28 02:35:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-28 02:35:36,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-28 02:35:36,474 INFO L175 Difference]: Start difference. First operand has 231 places, 240 transitions, 2414 flow. Second operand 8 states and 193 transitions. [2024-06-28 02:35:36,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 271 transitions, 3042 flow [2024-06-28 02:35:36,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 271 transitions, 2965 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:36,887 INFO L231 Difference]: Finished difference. Result has 233 places, 240 transitions, 2396 flow [2024-06-28 02:35:36,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2396, PETRI_PLACES=233, PETRI_TRANSITIONS=240} [2024-06-28 02:35:36,888 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-28 02:35:36,888 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 240 transitions, 2396 flow [2024-06-28 02:35:36,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:36,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:36,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:36,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 02:35:36,888 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:36,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:36,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1248731172, now seen corresponding path program 5 times [2024-06-28 02:35:36,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:36,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586407444] [2024-06-28 02:35:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:36,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:36,959 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 02:35:36,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:36,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586407444] [2024-06-28 02:35:36,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586407444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:36,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:36,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:36,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739447939] [2024-06-28 02:35:36,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:36,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:36,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:36,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:36,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:37,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:37,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 240 transitions, 2396 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:37,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:37,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:37,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:37,491 INFO L124 PetriNetUnfolderBase]: 2120/3673 cut-off events. [2024-06-28 02:35:37,491 INFO L125 PetriNetUnfolderBase]: For 203908/203908 co-relation queries the response was YES. [2024-06-28 02:35:37,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21381 conditions, 3673 events. 2120/3673 cut-off events. For 203908/203908 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23711 event pairs, 615 based on Foata normal form. 8/3672 useless extension candidates. Maximal degree in co-relation 21273. Up to 2701 conditions per place. [2024-06-28 02:35:37,527 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 111 changer transitions 0/280 dead transitions. [2024-06-28 02:35:37,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 280 transitions, 3282 flow [2024-06-28 02:35:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 02:35:37,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-28 02:35:37,528 INFO L175 Difference]: Start difference. First operand has 233 places, 240 transitions, 2396 flow. Second operand 8 states and 209 transitions. [2024-06-28 02:35:37,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 280 transitions, 3282 flow [2024-06-28 02:35:38,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 280 transitions, 3206 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 02:35:38,263 INFO L231 Difference]: Finished difference. Result has 233 places, 242 transitions, 2600 flow [2024-06-28 02:35:38,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2600, PETRI_PLACES=233, PETRI_TRANSITIONS=242} [2024-06-28 02:35:38,264 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-28 02:35:38,264 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 242 transitions, 2600 flow [2024-06-28 02:35:38,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:38,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:38,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:38,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 02:35:38,264 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:38,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1562643148, now seen corresponding path program 6 times [2024-06-28 02:35:38,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:38,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156391929] [2024-06-28 02:35:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:38,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:38,337 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 02:35:38,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:38,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156391929] [2024-06-28 02:35:38,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156391929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:38,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:38,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:38,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810703242] [2024-06-28 02:35:38,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:38,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:38,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:38,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:38,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 242 transitions, 2600 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:38,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:38,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:38,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:38,842 INFO L124 PetriNetUnfolderBase]: 2148/3717 cut-off events. [2024-06-28 02:35:38,842 INFO L125 PetriNetUnfolderBase]: For 211402/211402 co-relation queries the response was YES. [2024-06-28 02:35:38,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21965 conditions, 3717 events. 2148/3717 cut-off events. For 211402/211402 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24004 event pairs, 635 based on Foata normal form. 8/3716 useless extension candidates. Maximal degree in co-relation 21857. Up to 3122 conditions per place. [2024-06-28 02:35:38,878 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 153 selfloop transitions, 110 changer transitions 0/271 dead transitions. [2024-06-28 02:35:38,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 271 transitions, 3248 flow [2024-06-28 02:35:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:35:38,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:35:38,879 INFO L175 Difference]: Start difference. First operand has 233 places, 242 transitions, 2600 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:35:38,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 271 transitions, 3248 flow [2024-06-28 02:35:39,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 271 transitions, 3070 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:39,741 INFO L231 Difference]: Finished difference. Result has 237 places, 243 transitions, 2677 flow [2024-06-28 02:35:39,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2677, PETRI_PLACES=237, PETRI_TRANSITIONS=243} [2024-06-28 02:35:39,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-28 02:35:39,741 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 243 transitions, 2677 flow [2024-06-28 02:35:39,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:39,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:39,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:39,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 02:35:39,742 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:39,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1000782540, now seen corresponding path program 7 times [2024-06-28 02:35:39,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:39,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212464845] [2024-06-28 02:35:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:39,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:39,824 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 02:35:39,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:39,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212464845] [2024-06-28 02:35:39,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212464845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:39,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:39,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:39,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272571854] [2024-06-28 02:35:39,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:39,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:39,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:39,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:39,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:39,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 243 transitions, 2677 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:39,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:39,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:39,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:40,334 INFO L124 PetriNetUnfolderBase]: 2176/3761 cut-off events. [2024-06-28 02:35:40,334 INFO L125 PetriNetUnfolderBase]: For 215105/215105 co-relation queries the response was YES. [2024-06-28 02:35:40,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22262 conditions, 3761 events. 2176/3761 cut-off events. For 215105/215105 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24296 event pairs, 639 based on Foata normal form. 8/3760 useless extension candidates. Maximal degree in co-relation 22152. Up to 3166 conditions per place. [2024-06-28 02:35:40,370 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 152 selfloop transitions, 109 changer transitions 0/269 dead transitions. [2024-06-28 02:35:40,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 269 transitions, 3305 flow [2024-06-28 02:35:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-28 02:35:40,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-28 02:35:40,372 INFO L175 Difference]: Start difference. First operand has 237 places, 243 transitions, 2677 flow. Second operand 8 states and 196 transitions. [2024-06-28 02:35:40,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 269 transitions, 3305 flow [2024-06-28 02:35:41,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 269 transitions, 3082 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:41,077 INFO L231 Difference]: Finished difference. Result has 239 places, 244 transitions, 2699 flow [2024-06-28 02:35:41,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2699, PETRI_PLACES=239, PETRI_TRANSITIONS=244} [2024-06-28 02:35:41,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-28 02:35:41,077 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 244 transitions, 2699 flow [2024-06-28 02:35:41,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:41,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:41,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:41,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 02:35:41,078 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:41,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:41,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1609700044, now seen corresponding path program 8 times [2024-06-28 02:35:41,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:41,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673500857] [2024-06-28 02:35:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:41,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:41,158 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 02:35:41,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:41,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673500857] [2024-06-28 02:35:41,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673500857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:41,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:41,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:41,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272237019] [2024-06-28 02:35:41,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:41,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:41,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:41,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:41,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:41,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:41,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 244 transitions, 2699 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:41,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:41,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:41,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:41,712 INFO L124 PetriNetUnfolderBase]: 2204/3814 cut-off events. [2024-06-28 02:35:41,712 INFO L125 PetriNetUnfolderBase]: For 221248/221248 co-relation queries the response was YES. [2024-06-28 02:35:41,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22629 conditions, 3814 events. 2204/3814 cut-off events. For 221248/221248 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24774 event pairs, 624 based on Foata normal form. 8/3820 useless extension candidates. Maximal degree in co-relation 22518. Up to 3386 conditions per place. [2024-06-28 02:35:41,751 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 233 selfloop transitions, 27 changer transitions 0/268 dead transitions. [2024-06-28 02:35:41,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 268 transitions, 3327 flow [2024-06-28 02:35:41,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:41,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:35:41,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-28 02:35:41,752 INFO L175 Difference]: Start difference. First operand has 239 places, 244 transitions, 2699 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:35:41,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 268 transitions, 3327 flow [2024-06-28 02:35:42,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 268 transitions, 3104 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:42,368 INFO L231 Difference]: Finished difference. Result has 241 places, 245 transitions, 2559 flow [2024-06-28 02:35:42,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2476, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2559, PETRI_PLACES=241, PETRI_TRANSITIONS=245} [2024-06-28 02:35:42,368 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-28 02:35:42,369 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 245 transitions, 2559 flow [2024-06-28 02:35:42,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:42,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:42,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:42,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 02:35:42,369 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:42,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:42,370 INFO L85 PathProgramCache]: Analyzing trace with hash 545794196, now seen corresponding path program 1 times [2024-06-28 02:35:42,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:42,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724264755] [2024-06-28 02:35:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:42,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:42,443 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 02:35:42,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:42,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724264755] [2024-06-28 02:35:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724264755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:42,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:42,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:42,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599136516] [2024-06-28 02:35:42,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:42,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:42,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:42,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:42,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 245 transitions, 2559 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:42,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:42,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:42,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:43,052 INFO L124 PetriNetUnfolderBase]: 2371/4086 cut-off events. [2024-06-28 02:35:43,053 INFO L125 PetriNetUnfolderBase]: For 304554/304554 co-relation queries the response was YES. [2024-06-28 02:35:43,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25996 conditions, 4086 events. 2371/4086 cut-off events. For 304554/304554 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26743 event pairs, 640 based on Foata normal form. 6/4075 useless extension candidates. Maximal degree in co-relation 25884. Up to 2422 conditions per place. [2024-06-28 02:35:43,095 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 160 selfloop transitions, 123 changer transitions 0/291 dead transitions. [2024-06-28 02:35:43,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 291 transitions, 3657 flow [2024-06-28 02:35:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-28 02:35:43,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665625 [2024-06-28 02:35:43,096 INFO L175 Difference]: Start difference. First operand has 241 places, 245 transitions, 2559 flow. Second operand 8 states and 213 transitions. [2024-06-28 02:35:43,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 291 transitions, 3657 flow [2024-06-28 02:35:43,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 291 transitions, 3596 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:43,952 INFO L231 Difference]: Finished difference. Result has 243 places, 247 transitions, 2806 flow [2024-06-28 02:35:43,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2806, PETRI_PLACES=243, PETRI_TRANSITIONS=247} [2024-06-28 02:35:43,953 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-28 02:35:43,953 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 247 transitions, 2806 flow [2024-06-28 02:35:43,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:43,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:43,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:43,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 02:35:43,953 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:43,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash 555317396, now seen corresponding path program 2 times [2024-06-28 02:35:43,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:43,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916939632] [2024-06-28 02:35:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:43,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:44,022 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 02:35:44,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:44,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916939632] [2024-06-28 02:35:44,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916939632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:44,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:44,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:44,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075542297] [2024-06-28 02:35:44,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:44,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:44,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:44,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:44,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:44,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:44,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 247 transitions, 2806 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:44,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:44,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:44,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:44,627 INFO L124 PetriNetUnfolderBase]: 2391/4116 cut-off events. [2024-06-28 02:35:44,628 INFO L125 PetriNetUnfolderBase]: For 315900/315900 co-relation queries the response was YES. [2024-06-28 02:35:44,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26720 conditions, 4116 events. 2391/4116 cut-off events. For 315900/315900 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 26949 event pairs, 702 based on Foata normal form. 6/4105 useless extension candidates. Maximal degree in co-relation 26607. Up to 2434 conditions per place. [2024-06-28 02:35:44,671 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 155 selfloop transitions, 123 changer transitions 0/286 dead transitions. [2024-06-28 02:35:44,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 286 transitions, 3700 flow [2024-06-28 02:35:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-28 02:35:44,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-28 02:35:44,672 INFO L175 Difference]: Start difference. First operand has 243 places, 247 transitions, 2806 flow. Second operand 8 states and 207 transitions. [2024-06-28 02:35:44,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 286 transitions, 3700 flow [2024-06-28 02:35:45,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 286 transitions, 3416 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:45,703 INFO L231 Difference]: Finished difference. Result has 246 places, 248 transitions, 2802 flow [2024-06-28 02:35:45,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2802, PETRI_PLACES=246, PETRI_TRANSITIONS=248} [2024-06-28 02:35:45,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-28 02:35:45,704 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 248 transitions, 2802 flow [2024-06-28 02:35:45,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:45,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:45,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:45,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 02:35:45,705 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:45,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash -994111340, now seen corresponding path program 3 times [2024-06-28 02:35:45,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:45,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012308097] [2024-06-28 02:35:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:45,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:45,776 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 02:35:45,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:45,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012308097] [2024-06-28 02:35:45,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012308097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:45,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:45,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:45,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816822010] [2024-06-28 02:35:45,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:45,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:45,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:45,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:45,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:45,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:45,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 248 transitions, 2802 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:45,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:45,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:45,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:46,380 INFO L124 PetriNetUnfolderBase]: 2411/4164 cut-off events. [2024-06-28 02:35:46,380 INFO L125 PetriNetUnfolderBase]: For 319635/319635 co-relation queries the response was YES. [2024-06-28 02:35:46,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26828 conditions, 4164 events. 2411/4164 cut-off events. For 319635/319635 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27415 event pairs, 762 based on Foata normal form. 6/4159 useless extension candidates. Maximal degree in co-relation 26714. Up to 3449 conditions per place. [2024-06-28 02:35:46,422 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 156 selfloop transitions, 113 changer transitions 0/277 dead transitions. [2024-06-28 02:35:46,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 277 transitions, 3462 flow [2024-06-28 02:35:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-28 02:35:46,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-28 02:35:46,424 INFO L175 Difference]: Start difference. First operand has 246 places, 248 transitions, 2802 flow. Second operand 8 states and 198 transitions. [2024-06-28 02:35:46,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 277 transitions, 3462 flow [2024-06-28 02:35:47,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 277 transitions, 3242 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 02:35:47,363 INFO L231 Difference]: Finished difference. Result has 249 places, 249 transitions, 2834 flow [2024-06-28 02:35:47,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2834, PETRI_PLACES=249, PETRI_TRANSITIONS=249} [2024-06-28 02:35:47,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-28 02:35:47,364 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 249 transitions, 2834 flow [2024-06-28 02:35:47,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:47,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:47,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:47,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 02:35:47,364 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:47,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1868446666, now seen corresponding path program 4 times [2024-06-28 02:35:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:47,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717313094] [2024-06-28 02:35:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:47,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:47,440 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 02:35:47,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:47,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717313094] [2024-06-28 02:35:47,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717313094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:47,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:47,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:47,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235012823] [2024-06-28 02:35:47,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:47,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:47,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:47,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:47,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:47,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:47,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 249 transitions, 2834 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:47,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:47,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:47,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:48,069 INFO L124 PetriNetUnfolderBase]: 2431/4209 cut-off events. [2024-06-28 02:35:48,069 INFO L125 PetriNetUnfolderBase]: For 327896/327896 co-relation queries the response was YES. [2024-06-28 02:35:48,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27011 conditions, 4209 events. 2431/4209 cut-off events. For 327896/327896 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27805 event pairs, 749 based on Foata normal form. 6/4211 useless extension candidates. Maximal degree in co-relation 26896. Up to 3721 conditions per place. [2024-06-28 02:35:48,114 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 239 selfloop transitions, 29 changer transitions 0/276 dead transitions. [2024-06-28 02:35:48,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 276 transitions, 3493 flow [2024-06-28 02:35:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-28 02:35:48,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-28 02:35:48,116 INFO L175 Difference]: Start difference. First operand has 249 places, 249 transitions, 2834 flow. Second operand 8 states and 189 transitions. [2024-06-28 02:35:48,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 276 transitions, 3493 flow [2024-06-28 02:35:48,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 276 transitions, 3261 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:48,902 INFO L231 Difference]: Finished difference. Result has 251 places, 250 transitions, 2687 flow [2024-06-28 02:35:48,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2687, PETRI_PLACES=251, PETRI_TRANSITIONS=250} [2024-06-28 02:35:48,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-28 02:35:48,903 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 250 transitions, 2687 flow [2024-06-28 02:35:48,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:48,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:48,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:48,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 02:35:48,904 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:48,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:48,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2107862324, now seen corresponding path program 9 times [2024-06-28 02:35:48,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:48,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505968494] [2024-06-28 02:35:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:48,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:48,975 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 02:35:48,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:48,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505968494] [2024-06-28 02:35:48,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505968494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:48,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:48,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:48,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440585311] [2024-06-28 02:35:48,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:48,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:48,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:48,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:48,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:49,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:49,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 250 transitions, 2687 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:49,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:49,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:49,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:49,648 INFO L124 PetriNetUnfolderBase]: 2619/4502 cut-off events. [2024-06-28 02:35:49,649 INFO L125 PetriNetUnfolderBase]: For 441733/441733 co-relation queries the response was YES. [2024-06-28 02:35:49,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30866 conditions, 4502 events. 2619/4502 cut-off events. For 441733/441733 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30036 event pairs, 863 based on Foata normal form. 8/4507 useless extension candidates. Maximal degree in co-relation 30750. Up to 3492 conditions per place. [2024-06-28 02:35:49,701 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 178 selfloop transitions, 101 changer transitions 0/287 dead transitions. [2024-06-28 02:35:49,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 287 transitions, 3599 flow [2024-06-28 02:35:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:35:49,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-28 02:35:49,702 INFO L175 Difference]: Start difference. First operand has 251 places, 250 transitions, 2687 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:35:49,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 287 transitions, 3599 flow [2024-06-28 02:35:51,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 287 transitions, 3533 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:51,058 INFO L231 Difference]: Finished difference. Result has 253 places, 252 transitions, 2885 flow [2024-06-28 02:35:51,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2621, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2885, PETRI_PLACES=253, PETRI_TRANSITIONS=252} [2024-06-28 02:35:51,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-28 02:35:51,059 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 252 transitions, 2885 flow [2024-06-28 02:35:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:51,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:51,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:51,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 02:35:51,059 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:51,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1683523314, now seen corresponding path program 10 times [2024-06-28 02:35:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:51,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270664678] [2024-06-28 02:35:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:51,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:51,132 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 02:35:51,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:51,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270664678] [2024-06-28 02:35:51,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270664678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:51,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:51,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:51,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679195476] [2024-06-28 02:35:51,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:51,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:51,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:51,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:51,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:51,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:51,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 252 transitions, 2885 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:51,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:51,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:51,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:51,794 INFO L124 PetriNetUnfolderBase]: 2647/4546 cut-off events. [2024-06-28 02:35:51,794 INFO L125 PetriNetUnfolderBase]: For 454608/454608 co-relation queries the response was YES. [2024-06-28 02:35:51,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31566 conditions, 4546 events. 2647/4546 cut-off events. For 454608/454608 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30325 event pairs, 883 based on Foata normal form. 8/4551 useless extension candidates. Maximal degree in co-relation 31449. Up to 3919 conditions per place. [2024-06-28 02:35:51,844 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 170 selfloop transitions, 100 changer transitions 0/278 dead transitions. [2024-06-28 02:35:51,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 278 transitions, 3541 flow [2024-06-28 02:35:51,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 02:35:51,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-28 02:35:51,845 INFO L175 Difference]: Start difference. First operand has 253 places, 252 transitions, 2885 flow. Second operand 8 states and 195 transitions. [2024-06-28 02:35:51,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 278 transitions, 3541 flow [2024-06-28 02:35:53,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 278 transitions, 3377 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 02:35:53,047 INFO L231 Difference]: Finished difference. Result has 257 places, 253 transitions, 2958 flow [2024-06-28 02:35:53,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2733, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2958, PETRI_PLACES=257, PETRI_TRANSITIONS=253} [2024-06-28 02:35:53,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-28 02:35:53,048 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 253 transitions, 2958 flow [2024-06-28 02:35:53,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:53,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:53,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:53,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 02:35:53,048 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:53,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:53,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1617625804, now seen corresponding path program 11 times [2024-06-28 02:35:53,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:53,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183192246] [2024-06-28 02:35:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:53,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:53,122 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 02:35:53,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:53,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183192246] [2024-06-28 02:35:53,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183192246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:53,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:53,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:53,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807493488] [2024-06-28 02:35:53,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:53,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:53,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:53,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:53,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:53,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:53,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 253 transitions, 2958 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:53,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:53,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:53,796 INFO L124 PetriNetUnfolderBase]: 2675/4590 cut-off events. [2024-06-28 02:35:53,796 INFO L125 PetriNetUnfolderBase]: For 463261/463261 co-relation queries the response was YES. [2024-06-28 02:35:53,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31869 conditions, 4590 events. 2675/4590 cut-off events. For 463261/463261 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30698 event pairs, 887 based on Foata normal form. 8/4595 useless extension candidates. Maximal degree in co-relation 31750. Up to 3963 conditions per place. [2024-06-28 02:35:53,847 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 170 selfloop transitions, 98 changer transitions 0/276 dead transitions. [2024-06-28 02:35:53,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 276 transitions, 3592 flow [2024-06-28 02:35:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-28 02:35:53,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:35:53,848 INFO L175 Difference]: Start difference. First operand has 257 places, 253 transitions, 2958 flow. Second operand 8 states and 192 transitions. [2024-06-28 02:35:53,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 276 transitions, 3592 flow [2024-06-28 02:35:55,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 276 transitions, 3389 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:55,071 INFO L231 Difference]: Finished difference. Result has 259 places, 254 transitions, 2978 flow [2024-06-28 02:35:55,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=259, PETRI_TRANSITIONS=254} [2024-06-28 02:35:55,072 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-28 02:35:55,072 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 254 transitions, 2978 flow [2024-06-28 02:35:55,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:55,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:55,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:55,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 02:35:55,073 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:55,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash -502047436, now seen corresponding path program 12 times [2024-06-28 02:35:55,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:55,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310841569] [2024-06-28 02:35:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:55,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:55,149 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 02:35:55,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:55,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310841569] [2024-06-28 02:35:55,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310841569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:55,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:55,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:55,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95563769] [2024-06-28 02:35:55,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:55,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:55,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:55,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:55,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 254 transitions, 2978 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:55,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:55,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:55,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:55,931 INFO L124 PetriNetUnfolderBase]: 2779/4762 cut-off events. [2024-06-28 02:35:55,931 INFO L125 PetriNetUnfolderBase]: For 560903/560903 co-relation queries the response was YES. [2024-06-28 02:35:55,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32813 conditions, 4762 events. 2779/4762 cut-off events. For 560903/560903 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32055 event pairs, 927 based on Foata normal form. 34/4793 useless extension candidates. Maximal degree in co-relation 32693. Up to 4001 conditions per place. [2024-06-28 02:35:55,982 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 173 selfloop transitions, 92 changer transitions 3/276 dead transitions. [2024-06-28 02:35:55,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 276 transitions, 3618 flow [2024-06-28 02:35:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:55,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-28 02:35:55,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:35:55,984 INFO L175 Difference]: Start difference. First operand has 259 places, 254 transitions, 2978 flow. Second operand 8 states and 192 transitions. [2024-06-28 02:35:55,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 276 transitions, 3618 flow [2024-06-28 02:35:57,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 276 transitions, 3417 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:57,321 INFO L231 Difference]: Finished difference. Result has 261 places, 254 transitions, 2983 flow [2024-06-28 02:35:57,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2983, PETRI_PLACES=261, PETRI_TRANSITIONS=254} [2024-06-28 02:35:57,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-28 02:35:57,322 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 254 transitions, 2983 flow [2024-06-28 02:35:57,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:57,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:57,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:57,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 02:35:57,322 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:57,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:57,323 INFO L85 PathProgramCache]: Analyzing trace with hash -71049068, now seen corresponding path program 5 times [2024-06-28 02:35:57,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:57,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406682303] [2024-06-28 02:35:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:57,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:57,391 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 02:35:57,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:57,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406682303] [2024-06-28 02:35:57,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406682303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:57,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:57,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:57,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199102201] [2024-06-28 02:35:57,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:57,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:57,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:57,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:57,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:57,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:57,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 254 transitions, 2983 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:57,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:57,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:57,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:35:58,161 INFO L124 PetriNetUnfolderBase]: 2936/5037 cut-off events. [2024-06-28 02:35:58,162 INFO L125 PetriNetUnfolderBase]: For 582812/582812 co-relation queries the response was YES. [2024-06-28 02:35:58,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36647 conditions, 5037 events. 2936/5037 cut-off events. For 582812/582812 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34242 event pairs, 932 based on Foata normal form. 6/5040 useless extension candidates. Maximal degree in co-relation 36526. Up to 3333 conditions per place. [2024-06-28 02:35:58,217 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 179 selfloop transitions, 110 changer transitions 0/297 dead transitions. [2024-06-28 02:35:58,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 297 transitions, 4121 flow [2024-06-28 02:35:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:35:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:35:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 02:35:58,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-28 02:35:58,219 INFO L175 Difference]: Start difference. First operand has 261 places, 254 transitions, 2983 flow. Second operand 8 states and 209 transitions. [2024-06-28 02:35:58,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 297 transitions, 4121 flow [2024-06-28 02:35:59,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 297 transitions, 3930 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 02:35:59,645 INFO L231 Difference]: Finished difference. Result has 263 places, 256 transitions, 3078 flow [2024-06-28 02:35:59,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3078, PETRI_PLACES=263, PETRI_TRANSITIONS=256} [2024-06-28 02:35:59,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-28 02:35:59,646 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 256 transitions, 3078 flow [2024-06-28 02:35:59,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:59,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:35:59,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:35:59,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 02:35:59,646 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:35:59,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:35:59,647 INFO L85 PathProgramCache]: Analyzing trace with hash -61525868, now seen corresponding path program 6 times [2024-06-28 02:35:59,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:35:59,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533318885] [2024-06-28 02:35:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:35:59,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:35:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:35:59,726 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 02:35:59,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:35:59,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533318885] [2024-06-28 02:35:59,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533318885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:35:59,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:35:59,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:35:59,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411420290] [2024-06-28 02:35:59,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:35:59,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:35:59,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:35:59,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:35:59,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:35:59,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:35:59,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 256 transitions, 3078 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:35:59,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:35:59,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:35:59,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:00,587 INFO L124 PetriNetUnfolderBase]: 2956/5067 cut-off events. [2024-06-28 02:36:00,587 INFO L125 PetriNetUnfolderBase]: For 599436/599436 co-relation queries the response was YES. [2024-06-28 02:36:00,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37221 conditions, 5067 events. 2956/5067 cut-off events. For 599436/599436 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34465 event pairs, 1010 based on Foata normal form. 6/5070 useless extension candidates. Maximal degree in co-relation 37099. Up to 3345 conditions per place. [2024-06-28 02:36:00,646 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 175 selfloop transitions, 109 changer transitions 0/292 dead transitions. [2024-06-28 02:36:00,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 292 transitions, 3994 flow [2024-06-28 02:36:00,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:00,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-28 02:36:00,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-28 02:36:00,648 INFO L175 Difference]: Start difference. First operand has 263 places, 256 transitions, 3078 flow. Second operand 8 states and 203 transitions. [2024-06-28 02:36:00,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 292 transitions, 3994 flow [2024-06-28 02:36:01,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 292 transitions, 3731 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 02:36:01,843 INFO L231 Difference]: Finished difference. Result has 266 places, 257 transitions, 3069 flow [2024-06-28 02:36:01,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3069, PETRI_PLACES=266, PETRI_TRANSITIONS=257} [2024-06-28 02:36:01,844 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-28 02:36:01,844 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 257 transitions, 3069 flow [2024-06-28 02:36:01,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:01,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:01,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:01,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 02:36:01,845 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:01,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash 656440408, now seen corresponding path program 7 times [2024-06-28 02:36:01,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:01,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408594558] [2024-06-28 02:36:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:01,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:01,918 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 02:36:01,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:01,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408594558] [2024-06-28 02:36:01,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408594558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:01,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:01,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:01,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683806219] [2024-06-28 02:36:01,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:01,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:01,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:01,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:01,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:01,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:01,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 257 transitions, 3069 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:01,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:01,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:01,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:02,673 INFO L124 PetriNetUnfolderBase]: 2976/5109 cut-off events. [2024-06-28 02:36:02,674 INFO L125 PetriNetUnfolderBase]: For 609141/609141 co-relation queries the response was YES. [2024-06-28 02:36:02,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37311 conditions, 5109 events. 2976/5109 cut-off events. For 609141/609141 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 34868 event pairs, 1048 based on Foata normal form. 6/5112 useless extension candidates. Maximal degree in co-relation 37188. Up to 4392 conditions per place. [2024-06-28 02:36:02,732 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 175 selfloop transitions, 100 changer transitions 0/283 dead transitions. [2024-06-28 02:36:02,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 283 transitions, 3733 flow [2024-06-28 02:36:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 02:36:02,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-28 02:36:02,733 INFO L175 Difference]: Start difference. First operand has 266 places, 257 transitions, 3069 flow. Second operand 8 states and 194 transitions. [2024-06-28 02:36:02,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 283 transitions, 3733 flow [2024-06-28 02:36:04,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 283 transitions, 3536 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 02:36:04,352 INFO L231 Difference]: Finished difference. Result has 269 places, 258 transitions, 3098 flow [2024-06-28 02:36:04,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3098, PETRI_PLACES=269, PETRI_TRANSITIONS=258} [2024-06-28 02:36:04,352 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-28 02:36:04,353 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 258 transitions, 3098 flow [2024-06-28 02:36:04,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:04,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:04,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:04,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 02:36:04,353 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:04,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:04,354 INFO L85 PathProgramCache]: Analyzing trace with hash -308107116, now seen corresponding path program 8 times [2024-06-28 02:36:04,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:04,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539249131] [2024-06-28 02:36:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:04,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:04,422 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 02:36:04,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:04,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539249131] [2024-06-28 02:36:04,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539249131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:04,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:04,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:04,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713470098] [2024-06-28 02:36:04,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:04,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:04,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:04,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:04,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 258 transitions, 3098 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:04,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:04,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:04,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:05,291 INFO L124 PetriNetUnfolderBase]: 3224/5567 cut-off events. [2024-06-28 02:36:05,291 INFO L125 PetriNetUnfolderBase]: For 798180/798180 co-relation queries the response was YES. [2024-06-28 02:36:05,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43195 conditions, 5567 events. 3224/5567 cut-off events. For 798180/798180 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 38828 event pairs, 1075 based on Foata normal form. 6/5570 useless extension candidates. Maximal degree in co-relation 43071. Up to 3377 conditions per place. [2024-06-28 02:36:05,355 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 194 selfloop transitions, 102 changer transitions 0/304 dead transitions. [2024-06-28 02:36:05,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 304 transitions, 4264 flow [2024-06-28 02:36:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:05,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-28 02:36:05,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.659375 [2024-06-28 02:36:05,356 INFO L175 Difference]: Start difference. First operand has 269 places, 258 transitions, 3098 flow. Second operand 8 states and 211 transitions. [2024-06-28 02:36:05,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 304 transitions, 4264 flow [2024-06-28 02:36:06,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 304 transitions, 4058 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:36:06,783 INFO L231 Difference]: Finished difference. Result has 271 places, 259 transitions, 3130 flow [2024-06-28 02:36:06,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3130, PETRI_PLACES=271, PETRI_TRANSITIONS=259} [2024-06-28 02:36:06,784 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-28 02:36:06,784 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 259 transitions, 3130 flow [2024-06-28 02:36:06,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:06,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:06,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:06,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 02:36:06,784 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:06,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:06,785 INFO L85 PathProgramCache]: Analyzing trace with hash 197379182, now seen corresponding path program 9 times [2024-06-28 02:36:06,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:06,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248187374] [2024-06-28 02:36:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:06,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:06,852 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 02:36:06,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:06,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248187374] [2024-06-28 02:36:06,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248187374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:06,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:06,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:06,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150301451] [2024-06-28 02:36:06,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:06,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:06,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:06,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:06,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 259 transitions, 3130 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:06,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:06,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:06,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:07,779 INFO L124 PetriNetUnfolderBase]: 3244/5603 cut-off events. [2024-06-28 02:36:07,779 INFO L125 PetriNetUnfolderBase]: For 818612/818612 co-relation queries the response was YES. [2024-06-28 02:36:07,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43789 conditions, 5603 events. 3244/5603 cut-off events. For 818612/818612 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 39082 event pairs, 1075 based on Foata normal form. 6/5606 useless extension candidates. Maximal degree in co-relation 43664. Up to 3389 conditions per place. [2024-06-28 02:36:07,839 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 193 selfloop transitions, 100 changer transitions 0/301 dead transitions. [2024-06-28 02:36:07,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 301 transitions, 4272 flow [2024-06-28 02:36:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:07,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-28 02:36:07,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-28 02:36:07,840 INFO L175 Difference]: Start difference. First operand has 271 places, 259 transitions, 3130 flow. Second operand 8 states and 207 transitions. [2024-06-28 02:36:07,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 301 transitions, 4272 flow [2024-06-28 02:36:09,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 301 transitions, 3788 flow, removed 25 selfloop flow, removed 12 redundant places. [2024-06-28 02:36:09,719 INFO L231 Difference]: Finished difference. Result has 267 places, 260 transitions, 2882 flow [2024-06-28 02:36:09,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2882, PETRI_PLACES=267, PETRI_TRANSITIONS=260} [2024-06-28 02:36:09,720 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-28 02:36:09,720 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 260 transitions, 2882 flow [2024-06-28 02:36:09,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:09,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:09,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:09,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 02:36:09,721 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:09,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2093635732, now seen corresponding path program 10 times [2024-06-28 02:36:09,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:09,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362927849] [2024-06-28 02:36:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:09,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:09,789 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 02:36:09,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:09,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362927849] [2024-06-28 02:36:09,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362927849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:09,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:09,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:09,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535265109] [2024-06-28 02:36:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:09,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:09,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:09,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:09,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:09,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:09,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 260 transitions, 2882 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:09,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:09,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:09,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:10,661 INFO L124 PetriNetUnfolderBase]: 3426/5899 cut-off events. [2024-06-28 02:36:10,661 INFO L125 PetriNetUnfolderBase]: For 993986/993986 co-relation queries the response was YES. [2024-06-28 02:36:10,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45780 conditions, 5899 events. 3426/5899 cut-off events. For 993986/993986 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 41542 event pairs, 1110 based on Foata normal form. 24/5920 useless extension candidates. Maximal degree in co-relation 45661. Up to 3424 conditions per place. [2024-06-28 02:36:10,726 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 193 selfloop transitions, 94 changer transitions 6/301 dead transitions. [2024-06-28 02:36:10,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 301 transitions, 4017 flow [2024-06-28 02:36:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:36:10,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-28 02:36:10,728 INFO L175 Difference]: Start difference. First operand has 267 places, 260 transitions, 2882 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:36:10,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 301 transitions, 4017 flow [2024-06-28 02:36:13,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 301 transitions, 3826 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 02:36:13,150 INFO L231 Difference]: Finished difference. Result has 270 places, 259 transitions, 2891 flow [2024-06-28 02:36:13,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2891, PETRI_PLACES=270, PETRI_TRANSITIONS=259} [2024-06-28 02:36:13,151 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-28 02:36:13,151 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 259 transitions, 2891 flow [2024-06-28 02:36:13,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:13,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:13,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:13,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 02:36:13,152 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:13,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash -352732050, now seen corresponding path program 11 times [2024-06-28 02:36:13,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:13,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900801300] [2024-06-28 02:36:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:13,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:13,220 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 02:36:13,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:13,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900801300] [2024-06-28 02:36:13,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900801300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:13,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:13,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:13,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207125017] [2024-06-28 02:36:13,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:13,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:13,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:13,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:13,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:13,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:13,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 259 transitions, 2891 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:13,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:13,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:13,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:14,207 INFO L124 PetriNetUnfolderBase]: 3696/6381 cut-off events. [2024-06-28 02:36:14,207 INFO L125 PetriNetUnfolderBase]: For 1252721/1252721 co-relation queries the response was YES. [2024-06-28 02:36:14,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52907 conditions, 6381 events. 3696/6381 cut-off events. For 1252721/1252721 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46051 event pairs, 1494 based on Foata normal form. 30/6408 useless extension candidates. Maximal degree in co-relation 52787. Up to 4256 conditions per place. [2024-06-28 02:36:14,280 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 186 selfloop transitions, 90 changer transitions 9/293 dead transitions. [2024-06-28 02:36:14,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 293 transitions, 3839 flow [2024-06-28 02:36:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:36:14,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:36:14,281 INFO L175 Difference]: Start difference. First operand has 270 places, 259 transitions, 2891 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:36:14,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 293 transitions, 3839 flow [2024-06-28 02:36:16,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 293 transitions, 3641 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:36:17,001 INFO L231 Difference]: Finished difference. Result has 272 places, 257 transitions, 2875 flow [2024-06-28 02:36:17,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2875, PETRI_PLACES=272, PETRI_TRANSITIONS=257} [2024-06-28 02:36:17,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-28 02:36:17,001 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 257 transitions, 2875 flow [2024-06-28 02:36:17,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:17,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:17,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:17,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 02:36:17,002 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:17,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:17,002 INFO L85 PathProgramCache]: Analyzing trace with hash 586862, now seen corresponding path program 12 times [2024-06-28 02:36:17,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:17,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317137910] [2024-06-28 02:36:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:17,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:17,073 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 02:36:17,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:17,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317137910] [2024-06-28 02:36:17,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317137910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:17,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:17,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:17,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183397113] [2024-06-28 02:36:17,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:17,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:17,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:17,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:17,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:17,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 257 transitions, 2875 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:17,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:17,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:17,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:17,953 INFO L124 PetriNetUnfolderBase]: 3273/5632 cut-off events. [2024-06-28 02:36:17,954 INFO L125 PetriNetUnfolderBase]: For 971832/971832 co-relation queries the response was YES. [2024-06-28 02:36:17,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43376 conditions, 5632 events. 3273/5632 cut-off events. For 971832/971832 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39358 event pairs, 1203 based on Foata normal form. 30/5659 useless extension candidates. Maximal degree in co-relation 43255. Up to 4643 conditions per place. [2024-06-28 02:36:18,015 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 177 selfloop transitions, 92 changer transitions 8/285 dead transitions. [2024-06-28 02:36:18,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 285 transitions, 3577 flow [2024-06-28 02:36:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-28 02:36:18,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-28 02:36:18,016 INFO L175 Difference]: Start difference. First operand has 272 places, 257 transitions, 2875 flow. Second operand 8 states and 197 transitions. [2024-06-28 02:36:18,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 285 transitions, 3577 flow [2024-06-28 02:36:19,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 285 transitions, 3381 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 02:36:19,969 INFO L231 Difference]: Finished difference. Result has 274 places, 255 transitions, 2865 flow [2024-06-28 02:36:19,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2865, PETRI_PLACES=274, PETRI_TRANSITIONS=255} [2024-06-28 02:36:19,970 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-28 02:36:19,970 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 255 transitions, 2865 flow [2024-06-28 02:36:19,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:19,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:19,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:19,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 02:36:19,971 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:19,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash 859335014, now seen corresponding path program 13 times [2024-06-28 02:36:19,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:19,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667596614] [2024-06-28 02:36:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:19,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:20,048 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 02:36:20,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:20,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667596614] [2024-06-28 02:36:20,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667596614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:20,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:20,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:20,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644523446] [2024-06-28 02:36:20,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:20,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:20,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:20,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:20,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 255 transitions, 2865 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:20,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:20,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:20,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:20,815 INFO L124 PetriNetUnfolderBase]: 2886/4973 cut-off events. [2024-06-28 02:36:20,816 INFO L125 PetriNetUnfolderBase]: For 765920/765920 co-relation queries the response was YES. [2024-06-28 02:36:20,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35513 conditions, 4973 events. 2886/4973 cut-off events. For 765920/765920 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33948 event pairs, 1025 based on Foata normal form. 34/5004 useless extension candidates. Maximal degree in co-relation 35391. Up to 4162 conditions per place. [2024-06-28 02:36:20,874 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 64 changer transitions 3/284 dead transitions. [2024-06-28 02:36:20,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 284 transitions, 3521 flow [2024-06-28 02:36:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-28 02:36:20,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 02:36:20,876 INFO L175 Difference]: Start difference. First operand has 274 places, 255 transitions, 2865 flow. Second operand 7 states and 182 transitions. [2024-06-28 02:36:20,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 284 transitions, 3521 flow [2024-06-28 02:36:23,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 284 transitions, 3315 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 02:36:23,355 INFO L231 Difference]: Finished difference. Result has 275 places, 254 transitions, 2788 flow [2024-06-28 02:36:23,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2788, PETRI_PLACES=275, PETRI_TRANSITIONS=254} [2024-06-28 02:36:23,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-28 02:36:23,356 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 254 transitions, 2788 flow [2024-06-28 02:36:23,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:23,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:23,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:23,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 02:36:23,357 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:23,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:23,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1790731320, now seen corresponding path program 14 times [2024-06-28 02:36:23,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:23,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676639225] [2024-06-28 02:36:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:23,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:23,447 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 02:36:23,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:23,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676639225] [2024-06-28 02:36:23,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676639225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:23,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:23,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:23,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623080512] [2024-06-28 02:36:23,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:23,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:23,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:23,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:23,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:23,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:23,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 254 transitions, 2788 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:23,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:23,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:23,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:24,181 INFO L124 PetriNetUnfolderBase]: 2807/4865 cut-off events. [2024-06-28 02:36:24,182 INFO L125 PetriNetUnfolderBase]: For 640858/640858 co-relation queries the response was YES. [2024-06-28 02:36:24,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31907 conditions, 4865 events. 2807/4865 cut-off events. For 640858/640858 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33135 event pairs, 956 based on Foata normal form. 34/4897 useless extension candidates. Maximal degree in co-relation 31784. Up to 4013 conditions per place. [2024-06-28 02:36:24,233 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 74 changer transitions 3/294 dead transitions. [2024-06-28 02:36:24,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 294 transitions, 3492 flow [2024-06-28 02:36:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:36:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:36:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-28 02:36:24,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 02:36:24,234 INFO L175 Difference]: Start difference. First operand has 275 places, 254 transitions, 2788 flow. Second operand 9 states and 234 transitions. [2024-06-28 02:36:24,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 294 transitions, 3492 flow [2024-06-28 02:36:26,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 294 transitions, 3338 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 02:36:26,048 INFO L231 Difference]: Finished difference. Result has 277 places, 253 transitions, 2786 flow [2024-06-28 02:36:26,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2786, PETRI_PLACES=277, PETRI_TRANSITIONS=253} [2024-06-28 02:36:26,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-28 02:36:26,049 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 253 transitions, 2786 flow [2024-06-28 02:36:26,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:26,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:26,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:26,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 02:36:26,049 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:26,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash -607429770, now seen corresponding path program 13 times [2024-06-28 02:36:26,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:26,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726738921] [2024-06-28 02:36:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:26,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:26,126 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 02:36:26,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:26,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726738921] [2024-06-28 02:36:26,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726738921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:26,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:26,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:26,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555778381] [2024-06-28 02:36:26,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:26,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:26,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:26,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:26,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:26,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:26,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 253 transitions, 2786 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:26,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:26,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:26,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:26,950 INFO L124 PetriNetUnfolderBase]: 2738/4753 cut-off events. [2024-06-28 02:36:26,950 INFO L125 PetriNetUnfolderBase]: For 499239/499239 co-relation queries the response was YES. [2024-06-28 02:36:26,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28690 conditions, 4753 events. 2738/4753 cut-off events. For 499239/499239 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32339 event pairs, 848 based on Foata normal form. 30/4780 useless extension candidates. Maximal degree in co-relation 28567. Up to 3675 conditions per place. [2024-06-28 02:36:26,998 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 208 selfloop transitions, 64 changer transitions 8/288 dead transitions. [2024-06-28 02:36:26,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 288 transitions, 3496 flow [2024-06-28 02:36:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-28 02:36:26,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-28 02:36:26,999 INFO L175 Difference]: Start difference. First operand has 277 places, 253 transitions, 2786 flow. Second operand 7 states and 187 transitions. [2024-06-28 02:36:26,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 288 transitions, 3496 flow [2024-06-28 02:36:28,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 288 transitions, 3325 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 02:36:28,302 INFO L231 Difference]: Finished difference. Result has 275 places, 250 transitions, 2725 flow [2024-06-28 02:36:28,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2725, PETRI_PLACES=275, PETRI_TRANSITIONS=250} [2024-06-28 02:36:28,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-28 02:36:28,303 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 250 transitions, 2725 flow [2024-06-28 02:36:28,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:28,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:28,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:28,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 02:36:28,304 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:28,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash -960748682, now seen corresponding path program 14 times [2024-06-28 02:36:28,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:28,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820629066] [2024-06-28 02:36:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:28,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:28,385 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 02:36:28,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:28,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820629066] [2024-06-28 02:36:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820629066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:28,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:28,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195089850] [2024-06-28 02:36:28,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:28,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:28,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:28,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:28,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 250 transitions, 2725 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:28,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:28,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:28,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:29,119 INFO L124 PetriNetUnfolderBase]: 2630/4583 cut-off events. [2024-06-28 02:36:29,119 INFO L125 PetriNetUnfolderBase]: For 472736/472736 co-relation queries the response was YES. [2024-06-28 02:36:29,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27371 conditions, 4583 events. 2630/4583 cut-off events. For 472736/472736 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31091 event pairs, 664 based on Foata normal form. 30/4610 useless extension candidates. Maximal degree in co-relation 27248. Up to 2120 conditions per place. [2024-06-28 02:36:29,166 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 203 selfloop transitions, 68 changer transitions 11/290 dead transitions. [2024-06-28 02:36:29,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 290 transitions, 3653 flow [2024-06-28 02:36:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-28 02:36:29,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-28 02:36:29,167 INFO L175 Difference]: Start difference. First operand has 275 places, 250 transitions, 2725 flow. Second operand 7 states and 190 transitions. [2024-06-28 02:36:29,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 290 transitions, 3653 flow [2024-06-28 02:36:30,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 290 transitions, 3466 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:30,380 INFO L231 Difference]: Finished difference. Result has 274 places, 245 transitions, 2630 flow [2024-06-28 02:36:30,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2630, PETRI_PLACES=274, PETRI_TRANSITIONS=245} [2024-06-28 02:36:30,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-28 02:36:30,380 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 245 transitions, 2630 flow [2024-06-28 02:36:30,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:30,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:30,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:30,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 02:36:30,381 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:30,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:30,381 INFO L85 PathProgramCache]: Analyzing trace with hash -855205616, now seen corresponding path program 15 times [2024-06-28 02:36:30,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:30,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063524163] [2024-06-28 02:36:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:30,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:30,455 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 02:36:30,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:30,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063524163] [2024-06-28 02:36:30,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063524163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:30,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:30,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:30,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269087028] [2024-06-28 02:36:30,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:30,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:30,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:30,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 245 transitions, 2630 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:30,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:30,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:30,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:31,122 INFO L124 PetriNetUnfolderBase]: 2402/4190 cut-off events. [2024-06-28 02:36:31,123 INFO L125 PetriNetUnfolderBase]: For 350172/350172 co-relation queries the response was YES. [2024-06-28 02:36:31,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22918 conditions, 4190 events. 2402/4190 cut-off events. For 350172/350172 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 28012 event pairs, 637 based on Foata normal form. 30/4216 useless extension candidates. Maximal degree in co-relation 22795. Up to 3004 conditions per place. [2024-06-28 02:36:31,170 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 200 selfloop transitions, 77 changer transitions 6/291 dead transitions. [2024-06-28 02:36:31,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 291 transitions, 3374 flow [2024-06-28 02:36:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:36:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:36:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-28 02:36:31,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 02:36:31,171 INFO L175 Difference]: Start difference. First operand has 274 places, 245 transitions, 2630 flow. Second operand 9 states and 236 transitions. [2024-06-28 02:36:31,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 291 transitions, 3374 flow [2024-06-28 02:36:32,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 291 transitions, 3194 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:32,231 INFO L231 Difference]: Finished difference. Result has 275 places, 244 transitions, 2599 flow [2024-06-28 02:36:32,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2599, PETRI_PLACES=275, PETRI_TRANSITIONS=244} [2024-06-28 02:36:32,232 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-28 02:36:32,232 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 244 transitions, 2599 flow [2024-06-28 02:36:32,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:32,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:32,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:32,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 02:36:32,233 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:32,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1754781842, now seen corresponding path program 1 times [2024-06-28 02:36:32,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:32,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137896229] [2024-06-28 02:36:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:32,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:32,306 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 02:36:32,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:32,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137896229] [2024-06-28 02:36:32,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137896229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:32,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564050688] [2024-06-28 02:36:32,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:32,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:32,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:32,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:32,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:32,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:32,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 244 transitions, 2599 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:32,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:32,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:32,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:32,947 INFO L124 PetriNetUnfolderBase]: 2501/4397 cut-off events. [2024-06-28 02:36:32,948 INFO L125 PetriNetUnfolderBase]: For 372146/372146 co-relation queries the response was YES. [2024-06-28 02:36:32,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25011 conditions, 4397 events. 2501/4397 cut-off events. For 372146/372146 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29653 event pairs, 480 based on Foata normal form. 18/4412 useless extension candidates. Maximal degree in co-relation 24888. Up to 2230 conditions per place. [2024-06-28 02:36:32,992 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 180 selfloop transitions, 83 changer transitions 15/286 dead transitions. [2024-06-28 02:36:32,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 286 transitions, 3707 flow [2024-06-28 02:36:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:36:32,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-28 02:36:32,993 INFO L175 Difference]: Start difference. First operand has 275 places, 244 transitions, 2599 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:36:32,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 286 transitions, 3707 flow [2024-06-28 02:36:34,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 286 transitions, 3488 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-28 02:36:34,262 INFO L231 Difference]: Finished difference. Result has 273 places, 242 transitions, 2535 flow [2024-06-28 02:36:34,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2535, PETRI_PLACES=273, PETRI_TRANSITIONS=242} [2024-06-28 02:36:34,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-28 02:36:34,262 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 242 transitions, 2535 flow [2024-06-28 02:36:34,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:34,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:34,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:34,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 02:36:34,263 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:34,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash 152968730, now seen corresponding path program 2 times [2024-06-28 02:36:34,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:34,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917642333] [2024-06-28 02:36:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:34,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:34,341 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 02:36:34,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:34,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917642333] [2024-06-28 02:36:34,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917642333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:34,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:34,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:34,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084977565] [2024-06-28 02:36:34,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:34,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:34,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:34,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:34,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:34,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:34,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 242 transitions, 2535 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:34,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:34,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:34,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:34,993 INFO L124 PetriNetUnfolderBase]: 2550/4483 cut-off events. [2024-06-28 02:36:34,994 INFO L125 PetriNetUnfolderBase]: For 425584/425584 co-relation queries the response was YES. [2024-06-28 02:36:35,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26688 conditions, 4483 events. 2550/4483 cut-off events. For 425584/425584 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 30454 event pairs, 715 based on Foata normal form. 18/4498 useless extension candidates. Maximal degree in co-relation 26565. Up to 3573 conditions per place. [2024-06-28 02:36:35,040 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 235 selfloop transitions, 23 changer transitions 8/274 dead transitions. [2024-06-28 02:36:35,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 274 transitions, 3387 flow [2024-06-28 02:36:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:36:35,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-28 02:36:35,041 INFO L175 Difference]: Start difference. First operand has 273 places, 242 transitions, 2535 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:36:35,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 274 transitions, 3387 flow [2024-06-28 02:36:36,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 274 transitions, 3213 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 02:36:36,283 INFO L231 Difference]: Finished difference. Result has 270 places, 240 transitions, 2393 flow [2024-06-28 02:36:36,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2393, PETRI_PLACES=270, PETRI_TRANSITIONS=240} [2024-06-28 02:36:36,283 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-28 02:36:36,284 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 240 transitions, 2393 flow [2024-06-28 02:36:36,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:36,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:36,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:36,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 02:36:36,284 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:36,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:36,285 INFO L85 PathProgramCache]: Analyzing trace with hash -723175216, now seen corresponding path program 3 times [2024-06-28 02:36:36,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:36,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181466589] [2024-06-28 02:36:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:36,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:36,362 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 02:36:36,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:36,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181466589] [2024-06-28 02:36:36,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181466589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:36,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:36,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:36,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534135020] [2024-06-28 02:36:36,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:36,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:36,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:36,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:36,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:36,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:36,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 240 transitions, 2393 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:36,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:36,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:36,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:36,958 INFO L124 PetriNetUnfolderBase]: 2237/3928 cut-off events. [2024-06-28 02:36:36,958 INFO L125 PetriNetUnfolderBase]: For 182705/182705 co-relation queries the response was YES. [2024-06-28 02:36:36,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18898 conditions, 3928 events. 2237/3928 cut-off events. For 182705/182705 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25896 event pairs, 539 based on Foata normal form. 18/3943 useless extension candidates. Maximal degree in co-relation 18776. Up to 3233 conditions per place. [2024-06-28 02:36:36,995 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 217 selfloop transitions, 20 changer transitions 22/267 dead transitions. [2024-06-28 02:36:36,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 267 transitions, 3021 flow [2024-06-28 02:36:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 02:36:36,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-28 02:36:36,996 INFO L175 Difference]: Start difference. First operand has 270 places, 240 transitions, 2393 flow. Second operand 7 states and 167 transitions. [2024-06-28 02:36:36,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 267 transitions, 3021 flow [2024-06-28 02:36:37,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 267 transitions, 2972 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 02:36:37,502 INFO L231 Difference]: Finished difference. Result has 269 places, 236 transitions, 2340 flow [2024-06-28 02:36:37,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2340, PETRI_PLACES=269, PETRI_TRANSITIONS=236} [2024-06-28 02:36:37,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-28 02:36:37,503 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 236 transitions, 2340 flow [2024-06-28 02:36:37,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:37,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:37,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:37,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 02:36:37,504 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:37,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1193574528, now seen corresponding path program 4 times [2024-06-28 02:36:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:37,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581584954] [2024-06-28 02:36:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:37,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:37,577 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 02:36:37,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:37,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581584954] [2024-06-28 02:36:37,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581584954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:37,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:37,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:37,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472801647] [2024-06-28 02:36:37,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:37,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:37,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:37,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:37,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:37,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:37,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 236 transitions, 2340 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:37,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:37,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:37,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:38,183 INFO L124 PetriNetUnfolderBase]: 2303/4013 cut-off events. [2024-06-28 02:36:38,184 INFO L125 PetriNetUnfolderBase]: For 296809/296809 co-relation queries the response was YES. [2024-06-28 02:36:38,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21428 conditions, 4013 events. 2303/4013 cut-off events. For 296809/296809 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26601 event pairs, 514 based on Foata normal form. 24/4035 useless extension candidates. Maximal degree in co-relation 21307. Up to 2582 conditions per place. [2024-06-28 02:36:38,225 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 175 selfloop transitions, 74 changer transitions 10/267 dead transitions. [2024-06-28 02:36:38,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 267 transitions, 3192 flow [2024-06-28 02:36:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 02:36:38,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-28 02:36:38,227 INFO L175 Difference]: Start difference. First operand has 269 places, 236 transitions, 2340 flow. Second operand 7 states and 180 transitions. [2024-06-28 02:36:38,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 267 transitions, 3192 flow [2024-06-28 02:36:39,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 267 transitions, 3134 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 02:36:39,032 INFO L231 Difference]: Finished difference. Result has 265 places, 232 transitions, 2385 flow [2024-06-28 02:36:39,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2385, PETRI_PLACES=265, PETRI_TRANSITIONS=232} [2024-06-28 02:36:39,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-28 02:36:39,033 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 232 transitions, 2385 flow [2024-06-28 02:36:39,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:39,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:39,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 02:36:39,034 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:39,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash -545819400, now seen corresponding path program 5 times [2024-06-28 02:36:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:39,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464921522] [2024-06-28 02:36:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:39,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:39,113 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 02:36:39,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:39,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464921522] [2024-06-28 02:36:39,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464921522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:39,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:39,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700162667] [2024-06-28 02:36:39,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:39,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:39,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:39,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 232 transitions, 2385 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:39,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:39,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:39,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:39,676 INFO L124 PetriNetUnfolderBase]: 2202/3857 cut-off events. [2024-06-28 02:36:39,676 INFO L125 PetriNetUnfolderBase]: For 296889/296889 co-relation queries the response was YES. [2024-06-28 02:36:39,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20664 conditions, 3857 events. 2202/3857 cut-off events. For 296889/296889 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25422 event pairs, 734 based on Foata normal form. 26/3881 useless extension candidates. Maximal degree in co-relation 20543. Up to 3223 conditions per place. [2024-06-28 02:36:39,717 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 185 selfloop transitions, 50 changer transitions 6/249 dead transitions. [2024-06-28 02:36:39,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 249 transitions, 2939 flow [2024-06-28 02:36:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:39,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 02:36:39,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-28 02:36:39,719 INFO L175 Difference]: Start difference. First operand has 265 places, 232 transitions, 2385 flow. Second operand 7 states and 167 transitions. [2024-06-28 02:36:39,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 249 transitions, 2939 flow [2024-06-28 02:36:40,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 249 transitions, 2768 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-28 02:36:40,471 INFO L231 Difference]: Finished difference. Result has 261 places, 228 transitions, 2294 flow [2024-06-28 02:36:40,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2294, PETRI_PLACES=261, PETRI_TRANSITIONS=228} [2024-06-28 02:36:40,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-28 02:36:40,472 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 228 transitions, 2294 flow [2024-06-28 02:36:40,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:40,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:40,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:40,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 02:36:40,474 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:40,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:40,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1329831298, now seen corresponding path program 6 times [2024-06-28 02:36:40,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:40,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830252943] [2024-06-28 02:36:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:40,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:40,572 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 02:36:40,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:40,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830252943] [2024-06-28 02:36:40,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830252943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:40,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:40,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917256663] [2024-06-28 02:36:40,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:40,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:40,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:40,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:40,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:40,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:40,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 228 transitions, 2294 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:40,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:40,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:40,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:41,105 INFO L124 PetriNetUnfolderBase]: 2073/3640 cut-off events. [2024-06-28 02:36:41,106 INFO L125 PetriNetUnfolderBase]: For 194667/194667 co-relation queries the response was YES. [2024-06-28 02:36:41,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17552 conditions, 3640 events. 2073/3640 cut-off events. For 194667/194667 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23812 event pairs, 596 based on Foata normal form. 24/3662 useless extension candidates. Maximal degree in co-relation 17432. Up to 2921 conditions per place. [2024-06-28 02:36:41,140 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 181 selfloop transitions, 52 changer transitions 10/251 dead transitions. [2024-06-28 02:36:41,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 251 transitions, 2898 flow [2024-06-28 02:36:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:36:41,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-28 02:36:41,142 INFO L175 Difference]: Start difference. First operand has 261 places, 228 transitions, 2294 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:36:41,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 251 transitions, 2898 flow [2024-06-28 02:36:41,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 251 transitions, 2787 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:41,698 INFO L231 Difference]: Finished difference. Result has 260 places, 223 transitions, 2248 flow [2024-06-28 02:36:41,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2248, PETRI_PLACES=260, PETRI_TRANSITIONS=223} [2024-06-28 02:36:41,698 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-28 02:36:41,699 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 223 transitions, 2248 flow [2024-06-28 02:36:41,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:41,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:41,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:41,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 02:36:41,699 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:41,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:41,700 INFO L85 PathProgramCache]: Analyzing trace with hash -420016520, now seen corresponding path program 7 times [2024-06-28 02:36:41,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:41,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114340632] [2024-06-28 02:36:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:41,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:41,787 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 02:36:41,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:41,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114340632] [2024-06-28 02:36:41,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114340632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:41,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:41,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:41,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585584846] [2024-06-28 02:36:41,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:41,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:41,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:41,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:41,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:41,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:41,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 223 transitions, 2248 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:41,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:41,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:41,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:42,338 INFO L124 PetriNetUnfolderBase]: 2097/3693 cut-off events. [2024-06-28 02:36:42,339 INFO L125 PetriNetUnfolderBase]: For 237207/237207 co-relation queries the response was YES. [2024-06-28 02:36:42,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19161 conditions, 3693 events. 2097/3693 cut-off events. For 237207/237207 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24135 event pairs, 353 based on Foata normal form. 18/3709 useless extension candidates. Maximal degree in co-relation 19041. Up to 2425 conditions per place. [2024-06-28 02:36:42,374 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 180 selfloop transitions, 57 changer transitions 8/253 dead transitions. [2024-06-28 02:36:42,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 253 transitions, 3046 flow [2024-06-28 02:36:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 02:36:42,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-28 02:36:42,375 INFO L175 Difference]: Start difference. First operand has 260 places, 223 transitions, 2248 flow. Second operand 7 states and 178 transitions. [2024-06-28 02:36:42,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 253 transitions, 3046 flow [2024-06-28 02:36:43,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 253 transitions, 2865 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-28 02:36:43,234 INFO L231 Difference]: Finished difference. Result has 255 places, 221 transitions, 2172 flow [2024-06-28 02:36:43,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2172, PETRI_PLACES=255, PETRI_TRANSITIONS=221} [2024-06-28 02:36:43,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2024-06-28 02:36:43,235 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 221 transitions, 2172 flow [2024-06-28 02:36:43,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:43,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:43,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:43,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 02:36:43,235 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:43,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:43,236 INFO L85 PathProgramCache]: Analyzing trace with hash -419809130, now seen corresponding path program 8 times [2024-06-28 02:36:43,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:43,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216496559] [2024-06-28 02:36:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:43,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:43,311 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 02:36:43,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:43,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216496559] [2024-06-28 02:36:43,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216496559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:43,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:43,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:43,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284474895] [2024-06-28 02:36:43,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:43,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:43,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:43,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:43,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 221 transitions, 2172 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:43,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:43,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:43,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:43,826 INFO L124 PetriNetUnfolderBase]: 1932/3404 cut-off events. [2024-06-28 02:36:43,826 INFO L125 PetriNetUnfolderBase]: For 163039/163039 co-relation queries the response was YES. [2024-06-28 02:36:43,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15917 conditions, 3404 events. 1932/3404 cut-off events. For 163039/163039 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22021 event pairs, 359 based on Foata normal form. 18/3420 useless extension candidates. Maximal degree in co-relation 15799. Up to 2425 conditions per place. [2024-06-28 02:36:43,858 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 171 selfloop transitions, 55 changer transitions 15/249 dead transitions. [2024-06-28 02:36:43,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 249 transitions, 2768 flow [2024-06-28 02:36:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:36:43,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:36:43,860 INFO L175 Difference]: Start difference. First operand has 255 places, 221 transitions, 2172 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:36:43,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 249 transitions, 2768 flow [2024-06-28 02:36:44,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 249 transitions, 2652 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 02:36:44,410 INFO L231 Difference]: Finished difference. Result has 254 places, 214 transitions, 2093 flow [2024-06-28 02:36:44,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2093, PETRI_PLACES=254, PETRI_TRANSITIONS=214} [2024-06-28 02:36:44,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-28 02:36:44,411 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 214 transitions, 2093 flow [2024-06-28 02:36:44,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:44,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:44,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:44,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 02:36:44,411 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:44,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:44,412 INFO L85 PathProgramCache]: Analyzing trace with hash -188493150, now seen corresponding path program 9 times [2024-06-28 02:36:44,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:44,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951024605] [2024-06-28 02:36:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:44,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:44,479 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 02:36:44,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:44,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951024605] [2024-06-28 02:36:44,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951024605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:44,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:44,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:44,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781490750] [2024-06-28 02:36:44,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:44,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:44,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:44,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:44,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:44,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 214 transitions, 2093 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:44,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:44,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:44,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:44,984 INFO L124 PetriNetUnfolderBase]: 2016/3530 cut-off events. [2024-06-28 02:36:44,985 INFO L125 PetriNetUnfolderBase]: For 266047/266047 co-relation queries the response was YES. [2024-06-28 02:36:45,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18307 conditions, 3530 events. 2016/3530 cut-off events. For 266047/266047 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22820 event pairs, 592 based on Foata normal form. 24/3548 useless extension candidates. Maximal degree in co-relation 18189. Up to 1887 conditions per place. [2024-06-28 02:36:45,018 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 147 selfloop transitions, 71 changer transitions 23/249 dead transitions. [2024-06-28 02:36:45,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 249 transitions, 2901 flow [2024-06-28 02:36:45,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-28 02:36:45,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-28 02:36:45,019 INFO L175 Difference]: Start difference. First operand has 254 places, 214 transitions, 2093 flow. Second operand 8 states and 196 transitions. [2024-06-28 02:36:45,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 249 transitions, 2901 flow [2024-06-28 02:36:45,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 249 transitions, 2747 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-28 02:36:45,993 INFO L231 Difference]: Finished difference. Result has 246 places, 206 transitions, 2001 flow [2024-06-28 02:36:45,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2001, PETRI_PLACES=246, PETRI_TRANSITIONS=206} [2024-06-28 02:36:45,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-28 02:36:45,993 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 206 transitions, 2001 flow [2024-06-28 02:36:45,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:45,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:45,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:45,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 02:36:45,994 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:45,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:45,994 INFO L85 PathProgramCache]: Analyzing trace with hash 47835970, now seen corresponding path program 1 times [2024-06-28 02:36:45,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:45,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719331900] [2024-06-28 02:36:45,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:45,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:46,066 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 02:36:46,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:46,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719331900] [2024-06-28 02:36:46,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719331900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:46,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:46,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:46,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125988961] [2024-06-28 02:36:46,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:46,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:46,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:46,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:46,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:46,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 206 transitions, 2001 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:46,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:46,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:46,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:46,572 INFO L124 PetriNetUnfolderBase]: 1951/3431 cut-off events. [2024-06-28 02:36:46,573 INFO L125 PetriNetUnfolderBase]: For 345766/345766 co-relation queries the response was YES. [2024-06-28 02:36:46,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19654 conditions, 3431 events. 1951/3431 cut-off events. For 345766/345766 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22227 event pairs, 649 based on Foata normal form. 24/3449 useless extension candidates. Maximal degree in co-relation 19540. Up to 2530 conditions per place. [2024-06-28 02:36:46,607 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 144 selfloop transitions, 69 changer transitions 13/234 dead transitions. [2024-06-28 02:36:46,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 234 transitions, 2739 flow [2024-06-28 02:36:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:36:46,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-28 02:36:46,609 INFO L175 Difference]: Start difference. First operand has 246 places, 206 transitions, 2001 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:36:46,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 234 transitions, 2739 flow [2024-06-28 02:36:47,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 234 transitions, 2595 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 02:36:47,498 INFO L231 Difference]: Finished difference. Result has 241 places, 200 transitions, 1955 flow [2024-06-28 02:36:47,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1955, PETRI_PLACES=241, PETRI_TRANSITIONS=200} [2024-06-28 02:36:47,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-28 02:36:47,498 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 200 transitions, 1955 flow [2024-06-28 02:36:47,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:47,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:47,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:47,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 02:36:47,499 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:47,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:47,499 INFO L85 PathProgramCache]: Analyzing trace with hash -21674856, now seen corresponding path program 2 times [2024-06-28 02:36:47,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:47,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309717268] [2024-06-28 02:36:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:47,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:47,573 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 02:36:47,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:47,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309717268] [2024-06-28 02:36:47,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309717268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:47,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:47,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:47,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553897536] [2024-06-28 02:36:47,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:47,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:47,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:47,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:47,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 200 transitions, 1955 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:47,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:47,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:47,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:48,009 INFO L124 PetriNetUnfolderBase]: 1768/3126 cut-off events. [2024-06-28 02:36:48,009 INFO L125 PetriNetUnfolderBase]: For 251906/251906 co-relation queries the response was YES. [2024-06-28 02:36:48,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16096 conditions, 3126 events. 1768/3126 cut-off events. For 251906/251906 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20019 event pairs, 600 based on Foata normal form. 26/3146 useless extension candidates. Maximal degree in co-relation 15984. Up to 2530 conditions per place. [2024-06-28 02:36:48,040 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 62 changer transitions 21/221 dead transitions. [2024-06-28 02:36:48,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 221 transitions, 2457 flow [2024-06-28 02:36:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-28 02:36:48,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-28 02:36:48,041 INFO L175 Difference]: Start difference. First operand has 241 places, 200 transitions, 1955 flow. Second operand 8 states and 183 transitions. [2024-06-28 02:36:48,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 221 transitions, 2457 flow [2024-06-28 02:36:48,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 221 transitions, 2316 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:48,698 INFO L231 Difference]: Finished difference. Result has 238 places, 191 transitions, 1867 flow [2024-06-28 02:36:48,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1867, PETRI_PLACES=238, PETRI_TRANSITIONS=191} [2024-06-28 02:36:48,698 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-28 02:36:48,698 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 191 transitions, 1867 flow [2024-06-28 02:36:48,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:48,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:48,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:48,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 02:36:48,699 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:48,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:48,699 INFO L85 PathProgramCache]: Analyzing trace with hash 553089628, now seen corresponding path program 3 times [2024-06-28 02:36:48,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:48,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621675378] [2024-06-28 02:36:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:48,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:48,767 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 02:36:48,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:48,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621675378] [2024-06-28 02:36:48,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621675378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:48,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:48,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:48,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727050015] [2024-06-28 02:36:48,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:48,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:48,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:48,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:48,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:48,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:48,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 191 transitions, 1867 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:48,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:48,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:48,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:49,223 INFO L124 PetriNetUnfolderBase]: 1802/3187 cut-off events. [2024-06-28 02:36:49,224 INFO L125 PetriNetUnfolderBase]: For 270203/270203 co-relation queries the response was YES. [2024-06-28 02:36:49,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17440 conditions, 3187 events. 1802/3187 cut-off events. For 270203/270203 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20552 event pairs, 364 based on Foata normal form. 18/3204 useless extension candidates. Maximal degree in co-relation 17330. Up to 1082 conditions per place. [2024-06-28 02:36:49,254 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 126 selfloop transitions, 71 changer transitions 22/227 dead transitions. [2024-06-28 02:36:49,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 227 transitions, 2767 flow [2024-06-28 02:36:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 02:36:49,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-28 02:36:49,255 INFO L175 Difference]: Start difference. First operand has 238 places, 191 transitions, 1867 flow. Second operand 8 states and 195 transitions. [2024-06-28 02:36:49,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 227 transitions, 2767 flow [2024-06-28 02:36:49,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 227 transitions, 2611 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:49,856 INFO L231 Difference]: Finished difference. Result has 229 places, 182 transitions, 1775 flow [2024-06-28 02:36:49,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1775, PETRI_PLACES=229, PETRI_TRANSITIONS=182} [2024-06-28 02:36:49,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-28 02:36:49,857 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 182 transitions, 1775 flow [2024-06-28 02:36:49,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:49,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:49,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:49,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 02:36:49,857 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:49,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash 848308828, now seen corresponding path program 4 times [2024-06-28 02:36:49,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:49,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439721212] [2024-06-28 02:36:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:49,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:49,933 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 02:36:49,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:49,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439721212] [2024-06-28 02:36:49,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439721212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:49,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:49,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:49,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531159767] [2024-06-28 02:36:49,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:49,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:49,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:49,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:49,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 182 transitions, 1775 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:49,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:49,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:49,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:50,364 INFO L124 PetriNetUnfolderBase]: 1670/2957 cut-off events. [2024-06-28 02:36:50,365 INFO L125 PetriNetUnfolderBase]: For 301016/301016 co-relation queries the response was YES. [2024-06-28 02:36:50,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17769 conditions, 2957 events. 1670/2957 cut-off events. For 301016/301016 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18947 event pairs, 516 based on Foata normal form. 18/2974 useless extension candidates. Maximal degree in co-relation 17662. Up to 1648 conditions per place. [2024-06-28 02:36:50,389 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 134 selfloop transitions, 58 changer transitions 14/214 dead transitions. [2024-06-28 02:36:50,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 214 transitions, 2615 flow [2024-06-28 02:36:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-28 02:36:50,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:36:50,390 INFO L175 Difference]: Start difference. First operand has 229 places, 182 transitions, 1775 flow. Second operand 8 states and 192 transitions. [2024-06-28 02:36:50,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 214 transitions, 2615 flow [2024-06-28 02:36:50,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 214 transitions, 2455 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:50,878 INFO L231 Difference]: Finished difference. Result has 221 places, 174 transitions, 1693 flow [2024-06-28 02:36:50,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1693, PETRI_PLACES=221, PETRI_TRANSITIONS=174} [2024-06-28 02:36:50,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-28 02:36:50,879 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 174 transitions, 1693 flow [2024-06-28 02:36:50,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:50,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:50,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:50,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 02:36:50,879 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:50,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1279959864, now seen corresponding path program 5 times [2024-06-28 02:36:50,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:50,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826872485] [2024-06-28 02:36:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:50,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:50,949 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 02:36:50,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:50,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826872485] [2024-06-28 02:36:50,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826872485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:50,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:50,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:50,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316463983] [2024-06-28 02:36:50,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:50,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:50,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:50,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:50,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:50,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 174 transitions, 1693 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:50,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:50,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:50,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:51,311 INFO L124 PetriNetUnfolderBase]: 1493/2650 cut-off events. [2024-06-28 02:36:51,311 INFO L125 PetriNetUnfolderBase]: For 229921/229921 co-relation queries the response was YES. [2024-06-28 02:36:51,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14936 conditions, 2650 events. 1493/2650 cut-off events. For 229921/229921 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16588 event pairs, 504 based on Foata normal form. 18/2667 useless extension candidates. Maximal degree in co-relation 14832. Up to 1648 conditions per place. [2024-06-28 02:36:51,334 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 114 selfloop transitions, 50 changer transitions 29/201 dead transitions. [2024-06-28 02:36:51,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 201 transitions, 2319 flow [2024-06-28 02:36:51,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:36:51,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-28 02:36:51,335 INFO L175 Difference]: Start difference. First operand has 221 places, 174 transitions, 1693 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:36:51,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 201 transitions, 2319 flow [2024-06-28 02:36:51,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 201 transitions, 2169 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-28 02:36:51,834 INFO L231 Difference]: Finished difference. Result has 213 places, 160 transitions, 1515 flow [2024-06-28 02:36:51,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1515, PETRI_PLACES=213, PETRI_TRANSITIONS=160} [2024-06-28 02:36:51,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-28 02:36:51,835 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 160 transitions, 1515 flow [2024-06-28 02:36:51,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:51,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:51,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:51,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 02:36:51,835 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:51,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:51,836 INFO L85 PathProgramCache]: Analyzing trace with hash 285645634, now seen corresponding path program 6 times [2024-06-28 02:36:51,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:51,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512013844] [2024-06-28 02:36:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:51,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:51,907 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 02:36:51,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:51,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512013844] [2024-06-28 02:36:51,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512013844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:51,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:51,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:51,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579374085] [2024-06-28 02:36:51,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:51,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:51,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:51,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:51,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:51,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:51,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 160 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:51,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:51,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:51,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:52,262 INFO L124 PetriNetUnfolderBase]: 1547/2717 cut-off events. [2024-06-28 02:36:52,262 INFO L125 PetriNetUnfolderBase]: For 279224/279224 co-relation queries the response was YES. [2024-06-28 02:36:52,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16494 conditions, 2717 events. 1547/2717 cut-off events. For 279224/279224 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17121 event pairs, 574 based on Foata normal form. 24/2740 useless extension candidates. Maximal degree in co-relation 16395. Up to 1861 conditions per place. [2024-06-28 02:36:52,285 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 107 selfloop transitions, 51 changer transitions 16/182 dead transitions. [2024-06-28 02:36:52,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 182 transitions, 2093 flow [2024-06-28 02:36:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-28 02:36:52,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-28 02:36:52,286 INFO L175 Difference]: Start difference. First operand has 213 places, 160 transitions, 1515 flow. Second operand 8 states and 185 transitions. [2024-06-28 02:36:52,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 182 transitions, 2093 flow [2024-06-28 02:36:52,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 182 transitions, 1992 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-28 02:36:52,701 INFO L231 Difference]: Finished difference. Result has 196 places, 151 transitions, 1448 flow [2024-06-28 02:36:52,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1448, PETRI_PLACES=196, PETRI_TRANSITIONS=151} [2024-06-28 02:36:52,701 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-28 02:36:52,702 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 151 transitions, 1448 flow [2024-06-28 02:36:52,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:52,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:52,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:52,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 02:36:52,702 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:52,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1246690974, now seen corresponding path program 7 times [2024-06-28 02:36:52,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:52,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299512266] [2024-06-28 02:36:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:52,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:52,776 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 02:36:52,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:52,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299512266] [2024-06-28 02:36:52,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299512266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:52,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:52,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:52,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627184149] [2024-06-28 02:36:52,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:52,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:52,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:52,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:52,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 151 transitions, 1448 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:52,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:52,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:52,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:53,111 INFO L124 PetriNetUnfolderBase]: 1459/2573 cut-off events. [2024-06-28 02:36:53,111 INFO L125 PetriNetUnfolderBase]: For 237457/237457 co-relation queries the response was YES. [2024-06-28 02:36:53,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15385 conditions, 2573 events. 1459/2573 cut-off events. For 237457/237457 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16064 event pairs, 598 based on Foata normal form. 26/2598 useless extension candidates. Maximal degree in co-relation 15293. Up to 2072 conditions per place. [2024-06-28 02:36:53,132 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 96 selfloop transitions, 45 changer transitions 17/166 dead transitions. [2024-06-28 02:36:53,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 166 transitions, 1820 flow [2024-06-28 02:36:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-28 02:36:53,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-28 02:36:53,133 INFO L175 Difference]: Start difference. First operand has 196 places, 151 transitions, 1448 flow. Second operand 8 states and 180 transitions. [2024-06-28 02:36:53,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 166 transitions, 1820 flow [2024-06-28 02:36:53,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 166 transitions, 1710 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-28 02:36:53,427 INFO L231 Difference]: Finished difference. Result has 188 places, 142 transitions, 1364 flow [2024-06-28 02:36:53,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1364, PETRI_PLACES=188, PETRI_TRANSITIONS=142} [2024-06-28 02:36:53,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-28 02:36:53,428 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 142 transitions, 1364 flow [2024-06-28 02:36:53,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:53,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:53,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:53,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 02:36:53,428 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:53,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:53,429 INFO L85 PathProgramCache]: Analyzing trace with hash 634758334, now seen corresponding path program 8 times [2024-06-28 02:36:53,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:53,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221398069] [2024-06-28 02:36:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:53,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:53,500 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 02:36:53,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:53,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221398069] [2024-06-28 02:36:53,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221398069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:53,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:53,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:53,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317216333] [2024-06-28 02:36:53,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:53,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:53,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:53,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:53,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:53,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:53,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 142 transitions, 1364 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:53,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:53,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:53,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:53,833 INFO L124 PetriNetUnfolderBase]: 1437/2543 cut-off events. [2024-06-28 02:36:53,833 INFO L125 PetriNetUnfolderBase]: For 191196/191196 co-relation queries the response was YES. [2024-06-28 02:36:53,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14649 conditions, 2543 events. 1437/2543 cut-off events. For 191196/191196 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15884 event pairs, 562 based on Foata normal form. 24/2566 useless extension candidates. Maximal degree in co-relation 14563. Up to 1813 conditions per place. [2024-06-28 02:36:53,852 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 101 selfloop transitions, 45 changer transitions 10/164 dead transitions. [2024-06-28 02:36:53,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 164 transitions, 1882 flow [2024-06-28 02:36:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:53,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-28 02:36:53,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-28 02:36:53,853 INFO L175 Difference]: Start difference. First operand has 188 places, 142 transitions, 1364 flow. Second operand 8 states and 183 transitions. [2024-06-28 02:36:53,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 164 transitions, 1882 flow [2024-06-28 02:36:54,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 164 transitions, 1772 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-28 02:36:54,071 INFO L231 Difference]: Finished difference. Result has 180 places, 139 transitions, 1330 flow [2024-06-28 02:36:54,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1330, PETRI_PLACES=180, PETRI_TRANSITIONS=139} [2024-06-28 02:36:54,071 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-28 02:36:54,071 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 139 transitions, 1330 flow [2024-06-28 02:36:54,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:54,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:54,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:54,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 02:36:54,072 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:54,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1034933852, now seen corresponding path program 9 times [2024-06-28 02:36:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:54,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251982378] [2024-06-28 02:36:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:54,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:54,139 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 02:36:54,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:54,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251982378] [2024-06-28 02:36:54,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251982378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:54,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:54,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:54,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381566112] [2024-06-28 02:36:54,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:54,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:54,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:54,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:54,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:54,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 139 transitions, 1330 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:54,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:54,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:54,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:54,483 INFO L124 PetriNetUnfolderBase]: 1466/2610 cut-off events. [2024-06-28 02:36:54,483 INFO L125 PetriNetUnfolderBase]: For 181676/181676 co-relation queries the response was YES. [2024-06-28 02:36:54,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15261 conditions, 2610 events. 1466/2610 cut-off events. For 181676/181676 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16503 event pairs, 546 based on Foata normal form. 18/2627 useless extension candidates. Maximal degree in co-relation 15179. Up to 1589 conditions per place. [2024-06-28 02:36:54,500 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 101 selfloop transitions, 43 changer transitions 14/166 dead transitions. [2024-06-28 02:36:54,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 166 transitions, 1962 flow [2024-06-28 02:36:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-28 02:36:54,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-28 02:36:54,501 INFO L175 Difference]: Start difference. First operand has 180 places, 139 transitions, 1330 flow. Second operand 8 states and 190 transitions. [2024-06-28 02:36:54,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 166 transitions, 1962 flow [2024-06-28 02:36:54,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 166 transitions, 1863 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 02:36:54,722 INFO L231 Difference]: Finished difference. Result has 179 places, 131 transitions, 1263 flow [2024-06-28 02:36:54,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1263, PETRI_PLACES=179, PETRI_TRANSITIONS=131} [2024-06-28 02:36:54,722 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-28 02:36:54,722 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 131 transitions, 1263 flow [2024-06-28 02:36:54,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:54,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:54,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:54,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 02:36:54,723 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:54,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash 291220054, now seen corresponding path program 10 times [2024-06-28 02:36:54,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:54,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230071861] [2024-06-28 02:36:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:54,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:54,791 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 02:36:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:54,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230071861] [2024-06-28 02:36:54,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230071861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:54,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:54,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:54,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33128265] [2024-06-28 02:36:54,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:54,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:54,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:54,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:54,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:54,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:54,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 131 transitions, 1263 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:54,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:54,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:54,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:55,083 INFO L124 PetriNetUnfolderBase]: 1289/2303 cut-off events. [2024-06-28 02:36:55,083 INFO L125 PetriNetUnfolderBase]: For 151366/151366 co-relation queries the response was YES. [2024-06-28 02:36:55,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13274 conditions, 2303 events. 1289/2303 cut-off events. For 151366/151366 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14235 event pairs, 528 based on Foata normal form. 18/2320 useless extension candidates. Maximal degree in co-relation 13193. Up to 1589 conditions per place. [2024-06-28 02:36:55,101 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 89 selfloop transitions, 38 changer transitions 20/155 dead transitions. [2024-06-28 02:36:55,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 155 transitions, 1755 flow [2024-06-28 02:36:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:36:55,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-28 02:36:55,102 INFO L175 Difference]: Start difference. First operand has 179 places, 131 transitions, 1263 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:36:55,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 155 transitions, 1755 flow [2024-06-28 02:36:55,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 155 transitions, 1650 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-28 02:36:55,268 INFO L231 Difference]: Finished difference. Result has 172 places, 121 transitions, 1170 flow [2024-06-28 02:36:55,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1170, PETRI_PLACES=172, PETRI_TRANSITIONS=121} [2024-06-28 02:36:55,268 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-28 02:36:55,268 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 121 transitions, 1170 flow [2024-06-28 02:36:55,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:55,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:55,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:55,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 02:36:55,269 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:55,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:55,269 INFO L85 PathProgramCache]: Analyzing trace with hash 295624534, now seen corresponding path program 11 times [2024-06-28 02:36:55,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:55,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069098903] [2024-06-28 02:36:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:55,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:55,344 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 02:36:55,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069098903] [2024-06-28 02:36:55,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069098903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:55,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:55,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318583162] [2024-06-28 02:36:55,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:55,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:55,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:55,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 121 transitions, 1170 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:55,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:55,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:55,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:55,603 INFO L124 PetriNetUnfolderBase]: 1142/2042 cut-off events. [2024-06-28 02:36:55,604 INFO L125 PetriNetUnfolderBase]: For 109563/109563 co-relation queries the response was YES. [2024-06-28 02:36:55,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10824 conditions, 2042 events. 1142/2042 cut-off events. For 109563/109563 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12248 event pairs, 485 based on Foata normal form. 26/2067 useless extension candidates. Maximal degree in co-relation 10747. Up to 1589 conditions per place. [2024-06-28 02:36:55,619 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 71 selfloop transitions, 30 changer transitions 27/136 dead transitions. [2024-06-28 02:36:55,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 136 transitions, 1482 flow [2024-06-28 02:36:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:36:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:36:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 02:36:55,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-28 02:36:55,620 INFO L175 Difference]: Start difference. First operand has 172 places, 121 transitions, 1170 flow. Second operand 8 states and 174 transitions. [2024-06-28 02:36:55,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 136 transitions, 1482 flow [2024-06-28 02:36:55,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 136 transitions, 1395 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-28 02:36:55,713 INFO L231 Difference]: Finished difference. Result has 160 places, 107 transitions, 1020 flow [2024-06-28 02:36:55,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1020, PETRI_PLACES=160, PETRI_TRANSITIONS=107} [2024-06-28 02:36:55,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-28 02:36:55,713 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 107 transitions, 1020 flow [2024-06-28 02:36:55,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:55,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:55,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:55,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 02:36:55,714 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:55,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:55,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1406457900, now seen corresponding path program 12 times [2024-06-28 02:36:55,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:55,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013775578] [2024-06-28 02:36:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:55,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:55,792 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 02:36:55,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:55,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013775578] [2024-06-28 02:36:55,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013775578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:55,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:55,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:55,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933978840] [2024-06-28 02:36:55,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:55,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:55,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:55,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:55,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:55,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:55,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 107 transitions, 1020 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:55,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:55,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:55,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:56,118 INFO L124 PetriNetUnfolderBase]: 1233/2159 cut-off events. [2024-06-28 02:36:56,118 INFO L125 PetriNetUnfolderBase]: For 104765/104765 co-relation queries the response was YES. [2024-06-28 02:36:56,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11791 conditions, 2159 events. 1233/2159 cut-off events. For 104765/104765 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13072 event pairs, 524 based on Foata normal form. 24/2182 useless extension candidates. Maximal degree in co-relation 11720. Up to 1503 conditions per place. [2024-06-28 02:36:56,133 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 71 selfloop transitions, 38 changer transitions 10/127 dead transitions. [2024-06-28 02:36:56,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 127 transitions, 1428 flow [2024-06-28 02:36:56,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:36:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:36:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-28 02:36:56,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-28 02:36:56,134 INFO L175 Difference]: Start difference. First operand has 160 places, 107 transitions, 1020 flow. Second operand 9 states and 198 transitions. [2024-06-28 02:36:56,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 127 transitions, 1428 flow [2024-06-28 02:36:56,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 127 transitions, 1320 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-06-28 02:36:56,227 INFO L231 Difference]: Finished difference. Result has 141 places, 104 transitions, 969 flow [2024-06-28 02:36:56,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=969, PETRI_PLACES=141, PETRI_TRANSITIONS=104} [2024-06-28 02:36:56,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-28 02:36:56,228 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 104 transitions, 969 flow [2024-06-28 02:36:56,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:56,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:56,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:56,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 02:36:56,228 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:56,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:56,229 INFO L85 PathProgramCache]: Analyzing trace with hash 188509828, now seen corresponding path program 1 times [2024-06-28 02:36:56,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:56,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037298749] [2024-06-28 02:36:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:56,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:56,311 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 02:36:56,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:56,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037298749] [2024-06-28 02:36:56,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037298749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:56,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:56,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:56,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953558641] [2024-06-28 02:36:56,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:56,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:56,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:56,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:56,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 104 transitions, 969 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:56,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:56,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:56,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:56,567 INFO L124 PetriNetUnfolderBase]: 1066/1870 cut-off events. [2024-06-28 02:36:56,567 INFO L125 PetriNetUnfolderBase]: For 62684/62692 co-relation queries the response was YES. [2024-06-28 02:36:56,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9277 conditions, 1870 events. 1066/1870 cut-off events. For 62684/62692 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10912 event pairs, 475 based on Foata normal form. 34/1903 useless extension candidates. Maximal degree in co-relation 9214. Up to 1503 conditions per place. [2024-06-28 02:36:56,579 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 61 selfloop transitions, 34 changer transitions 14/117 dead transitions. [2024-06-28 02:36:56,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 117 transitions, 1237 flow [2024-06-28 02:36:56,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:36:56,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:36:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-28 02:36:56,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-28 02:36:56,580 INFO L175 Difference]: Start difference. First operand has 141 places, 104 transitions, 969 flow. Second operand 9 states and 190 transitions. [2024-06-28 02:36:56,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 117 transitions, 1237 flow [2024-06-28 02:36:56,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 117 transitions, 1160 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:56,640 INFO L231 Difference]: Finished difference. Result has 140 places, 99 transitions, 923 flow [2024-06-28 02:36:56,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=923, PETRI_PLACES=140, PETRI_TRANSITIONS=99} [2024-06-28 02:36:56,641 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-28 02:36:56,641 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 99 transitions, 923 flow [2024-06-28 02:36:56,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:56,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:56,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:56,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 02:36:56,642 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:56,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:56,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2032885762, now seen corresponding path program 2 times [2024-06-28 02:36:56,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:56,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508125915] [2024-06-28 02:36:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:56,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:56,720 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 02:36:56,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:56,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508125915] [2024-06-28 02:36:56,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508125915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:56,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:56,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:56,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145921134] [2024-06-28 02:36:56,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:56,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:56,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:56,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:56,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:56,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:56,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 99 transitions, 923 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:56,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:56,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:56,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:56,968 INFO L124 PetriNetUnfolderBase]: 1057/1857 cut-off events. [2024-06-28 02:36:56,968 INFO L125 PetriNetUnfolderBase]: For 59435/59435 co-relation queries the response was YES. [2024-06-28 02:36:56,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9126 conditions, 1857 events. 1057/1857 cut-off events. For 59435/59435 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10913 event pairs, 487 based on Foata normal form. 26/1882 useless extension candidates. Maximal degree in co-relation 9064. Up to 1497 conditions per place. [2024-06-28 02:36:56,979 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 27 changer transitions 12/110 dead transitions. [2024-06-28 02:36:56,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 110 transitions, 1173 flow [2024-06-28 02:36:56,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-28 02:36:56,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-28 02:36:56,980 INFO L175 Difference]: Start difference. First operand has 140 places, 99 transitions, 923 flow. Second operand 7 states and 154 transitions. [2024-06-28 02:36:56,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 110 transitions, 1173 flow [2024-06-28 02:36:57,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 110 transitions, 1099 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:57,039 INFO L231 Difference]: Finished difference. Result has 133 places, 95 transitions, 876 flow [2024-06-28 02:36:57,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=133, PETRI_TRANSITIONS=95} [2024-06-28 02:36:57,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-28 02:36:57,040 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 95 transitions, 876 flow [2024-06-28 02:36:57,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:57,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:57,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:57,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 02:36:57,041 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:57,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1625730836, now seen corresponding path program 3 times [2024-06-28 02:36:57,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:57,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768911558] [2024-06-28 02:36:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:57,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:57,116 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 02:36:57,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:57,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768911558] [2024-06-28 02:36:57,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768911558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:57,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:57,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:57,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792210160] [2024-06-28 02:36:57,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:57,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:57,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:57,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:57,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:57,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:57,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 95 transitions, 876 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:57,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:57,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:57,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:57,408 INFO L124 PetriNetUnfolderBase]: 1298/2282 cut-off events. [2024-06-28 02:36:57,408 INFO L125 PetriNetUnfolderBase]: For 80116/80116 co-relation queries the response was YES. [2024-06-28 02:36:57,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12104 conditions, 2282 events. 1298/2282 cut-off events. For 80116/80116 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 14291 event pairs, 574 based on Foata normal form. 18/2297 useless extension candidates. Maximal degree in co-relation 12044. Up to 1265 conditions per place. [2024-06-28 02:36:57,422 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 70 selfloop transitions, 35 changer transitions 7/120 dead transitions. [2024-06-28 02:36:57,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 120 transitions, 1334 flow [2024-06-28 02:36:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:36:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:36:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-28 02:36:57,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-28 02:36:57,423 INFO L175 Difference]: Start difference. First operand has 133 places, 95 transitions, 876 flow. Second operand 9 states and 201 transitions. [2024-06-28 02:36:57,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 120 transitions, 1334 flow [2024-06-28 02:36:57,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 120 transitions, 1268 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:36:57,490 INFO L231 Difference]: Finished difference. Result has 133 places, 94 transitions, 884 flow [2024-06-28 02:36:57,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=884, PETRI_PLACES=133, PETRI_TRANSITIONS=94} [2024-06-28 02:36:57,490 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-28 02:36:57,490 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 94 transitions, 884 flow [2024-06-28 02:36:57,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:57,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:57,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:57,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 02:36:57,491 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:57,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1625553206, now seen corresponding path program 4 times [2024-06-28 02:36:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:57,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700994370] [2024-06-28 02:36:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:57,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:57,572 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 02:36:57,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:57,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700994370] [2024-06-28 02:36:57,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700994370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:57,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:57,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:57,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110694658] [2024-06-28 02:36:57,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:57,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:57,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:57,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:57,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:57,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:57,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 94 transitions, 884 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:57,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:57,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:57,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:57,851 INFO L124 PetriNetUnfolderBase]: 1205/2129 cut-off events. [2024-06-28 02:36:57,851 INFO L125 PetriNetUnfolderBase]: For 66690/66698 co-relation queries the response was YES. [2024-06-28 02:36:57,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10993 conditions, 2129 events. 1205/2129 cut-off events. For 66690/66698 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13134 event pairs, 564 based on Foata normal form. 20/2146 useless extension candidates. Maximal degree in co-relation 10934. Up to 1799 conditions per place. [2024-06-28 02:36:57,866 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 76 selfloop transitions, 10 changer transitions 14/108 dead transitions. [2024-06-28 02:36:57,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 108 transitions, 1134 flow [2024-06-28 02:36:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-28 02:36:57,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-28 02:36:57,867 INFO L175 Difference]: Start difference. First operand has 133 places, 94 transitions, 884 flow. Second operand 7 states and 151 transitions. [2024-06-28 02:36:57,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 108 transitions, 1134 flow [2024-06-28 02:36:57,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 108 transitions, 1062 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:57,924 INFO L231 Difference]: Finished difference. Result has 131 places, 90 transitions, 805 flow [2024-06-28 02:36:57,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=805, PETRI_PLACES=131, PETRI_TRANSITIONS=90} [2024-06-28 02:36:57,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-28 02:36:57,925 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 90 transitions, 805 flow [2024-06-28 02:36:57,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:57,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:57,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:57,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 02:36:57,926 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:57,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash 343770102, now seen corresponding path program 5 times [2024-06-28 02:36:57,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:57,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018439355] [2024-06-28 02:36:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:57,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:58,006 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 02:36:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:58,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018439355] [2024-06-28 02:36:58,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018439355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:58,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:58,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864274046] [2024-06-28 02:36:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:58,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:58,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:58,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:58,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 90 transitions, 805 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:58,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:58,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:58,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:58,265 INFO L124 PetriNetUnfolderBase]: 1070/1892 cut-off events. [2024-06-28 02:36:58,266 INFO L125 PetriNetUnfolderBase]: For 57432/57432 co-relation queries the response was YES. [2024-06-28 02:36:58,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9411 conditions, 1892 events. 1070/1892 cut-off events. For 57432/57432 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11331 event pairs, 503 based on Foata normal form. 24/1915 useless extension candidates. Maximal degree in co-relation 9352. Up to 1295 conditions per place. [2024-06-28 02:36:58,276 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 65 selfloop transitions, 22 changer transitions 13/108 dead transitions. [2024-06-28 02:36:58,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 108 transitions, 1151 flow [2024-06-28 02:36:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-28 02:36:58,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-28 02:36:58,277 INFO L175 Difference]: Start difference. First operand has 131 places, 90 transitions, 805 flow. Second operand 7 states and 158 transitions. [2024-06-28 02:36:58,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 108 transitions, 1151 flow [2024-06-28 02:36:58,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 108 transitions, 1113 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 02:36:58,324 INFO L231 Difference]: Finished difference. Result has 129 places, 84 transitions, 764 flow [2024-06-28 02:36:58,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=129, PETRI_TRANSITIONS=84} [2024-06-28 02:36:58,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-28 02:36:58,325 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 84 transitions, 764 flow [2024-06-28 02:36:58,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:58,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:58,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:58,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 02:36:58,325 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:58,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:58,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1919782944, now seen corresponding path program 6 times [2024-06-28 02:36:58,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:58,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774535221] [2024-06-28 02:36:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:58,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:58,403 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 02:36:58,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:58,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774535221] [2024-06-28 02:36:58,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774535221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:58,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:58,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:58,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112908707] [2024-06-28 02:36:58,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:58,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:58,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:58,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:58,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:58,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 84 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:58,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:58,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:58,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:58,604 INFO L124 PetriNetUnfolderBase]: 914/1622 cut-off events. [2024-06-28 02:36:58,604 INFO L125 PetriNetUnfolderBase]: For 45632/45640 co-relation queries the response was YES. [2024-06-28 02:36:58,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7686 conditions, 1622 events. 914/1622 cut-off events. For 45632/45640 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9393 event pairs, 458 based on Foata normal form. 34/1653 useless extension candidates. Maximal degree in co-relation 7628. Up to 1295 conditions per place. [2024-06-28 02:36:58,612 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 54 selfloop transitions, 19 changer transitions 14/95 dead transitions. [2024-06-28 02:36:58,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 95 transitions, 984 flow [2024-06-28 02:36:58,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-28 02:36:58,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-28 02:36:58,613 INFO L175 Difference]: Start difference. First operand has 129 places, 84 transitions, 764 flow. Second operand 7 states and 151 transitions. [2024-06-28 02:36:58,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 95 transitions, 984 flow [2024-06-28 02:36:58,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 95 transitions, 937 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 02:36:58,647 INFO L231 Difference]: Finished difference. Result has 126 places, 78 transitions, 711 flow [2024-06-28 02:36:58,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=711, PETRI_PLACES=126, PETRI_TRANSITIONS=78} [2024-06-28 02:36:58,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-28 02:36:58,647 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 78 transitions, 711 flow [2024-06-28 02:36:58,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:58,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:58,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:58,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 02:36:58,648 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:58,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:58,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1919629122, now seen corresponding path program 13 times [2024-06-28 02:36:58,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:58,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438969675] [2024-06-28 02:36:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:58,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:58,723 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 02:36:58,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:58,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438969675] [2024-06-28 02:36:58,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438969675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:58,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:58,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:58,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947340161] [2024-06-28 02:36:58,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:58,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:58,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:58,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:58,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:58,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:58,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 78 transitions, 711 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:58,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:58,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:58,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:58,926 INFO L124 PetriNetUnfolderBase]: 781/1415 cut-off events. [2024-06-28 02:36:58,926 INFO L125 PetriNetUnfolderBase]: For 28629/28629 co-relation queries the response was YES. [2024-06-28 02:36:58,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6134 conditions, 1415 events. 781/1415 cut-off events. For 28629/28629 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8059 event pairs, 334 based on Foata normal form. 24/1436 useless extension candidates. Maximal degree in co-relation 6078. Up to 845 conditions per place. [2024-06-28 02:36:58,932 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 50 selfloop transitions, 10 changer transitions 27/95 dead transitions. [2024-06-28 02:36:58,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 95 transitions, 967 flow [2024-06-28 02:36:58,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-28 02:36:58,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-28 02:36:58,933 INFO L175 Difference]: Start difference. First operand has 126 places, 78 transitions, 711 flow. Second operand 7 states and 154 transitions. [2024-06-28 02:36:58,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 95 transitions, 967 flow [2024-06-28 02:36:58,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 95 transitions, 925 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 02:36:58,956 INFO L231 Difference]: Finished difference. Result has 123 places, 66 transitions, 561 flow [2024-06-28 02:36:58,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=561, PETRI_PLACES=123, PETRI_TRANSITIONS=66} [2024-06-28 02:36:58,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-28 02:36:58,957 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 66 transitions, 561 flow [2024-06-28 02:36:58,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:58,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:58,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:58,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 02:36:58,957 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:58,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2126282562, now seen corresponding path program 14 times [2024-06-28 02:36:58,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:58,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403908376] [2024-06-28 02:36:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:58,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:59,031 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 02:36:59,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:59,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403908376] [2024-06-28 02:36:59,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403908376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:59,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:59,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:59,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338760088] [2024-06-28 02:36:59,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:59,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:59,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:59,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 66 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:59,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:59,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:59,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:59,201 INFO L124 PetriNetUnfolderBase]: 589/1099 cut-off events. [2024-06-28 02:36:59,201 INFO L125 PetriNetUnfolderBase]: For 23571/23571 co-relation queries the response was YES. [2024-06-28 02:36:59,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4757 conditions, 1099 events. 589/1099 cut-off events. For 23571/23571 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5947 event pairs, 157 based on Foata normal form. 18/1114 useless extension candidates. Maximal degree in co-relation 4712. Up to 368 conditions per place. [2024-06-28 02:36:59,205 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 51 selfloop transitions, 11 changer transitions 14/84 dead transitions. [2024-06-28 02:36:59,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 84 transitions, 833 flow [2024-06-28 02:36:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-28 02:36:59,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-28 02:36:59,206 INFO L175 Difference]: Start difference. First operand has 123 places, 66 transitions, 561 flow. Second operand 7 states and 154 transitions. [2024-06-28 02:36:59,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 84 transitions, 833 flow [2024-06-28 02:36:59,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 84 transitions, 793 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:59,223 INFO L231 Difference]: Finished difference. Result has 112 places, 58 transitions, 467 flow [2024-06-28 02:36:59,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=112, PETRI_TRANSITIONS=58} [2024-06-28 02:36:59,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-28 02:36:59,223 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 58 transitions, 467 flow [2024-06-28 02:36:59,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:59,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:59,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:59,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 02:36:59,224 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:59,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2126638752, now seen corresponding path program 15 times [2024-06-28 02:36:59,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:59,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53035045] [2024-06-28 02:36:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:59,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:59,296 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 02:36:59,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:59,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53035045] [2024-06-28 02:36:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53035045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:59,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:59,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558375433] [2024-06-28 02:36:59,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:59,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:59,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:59,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:59,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:59,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 58 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:59,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:59,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:59,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:59,437 INFO L124 PetriNetUnfolderBase]: 352/684 cut-off events. [2024-06-28 02:36:59,437 INFO L125 PetriNetUnfolderBase]: For 12049/12049 co-relation queries the response was YES. [2024-06-28 02:36:59,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 684 events. 352/684 cut-off events. For 12049/12049 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3348 event pairs, 139 based on Foata normal form. 18/699 useless extension candidates. Maximal degree in co-relation 2752. Up to 368 conditions per place. [2024-06-28 02:36:59,440 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 30 selfloop transitions, 3 changer transitions 32/73 dead transitions. [2024-06-28 02:36:59,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 73 transitions, 649 flow [2024-06-28 02:36:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 02:36:59,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 02:36:59,441 INFO L175 Difference]: Start difference. First operand has 112 places, 58 transitions, 467 flow. Second operand 7 states and 150 transitions. [2024-06-28 02:36:59,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 73 transitions, 649 flow [2024-06-28 02:36:59,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 73 transitions, 618 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 02:36:59,451 INFO L231 Difference]: Finished difference. Result has 106 places, 40 transitions, 267 flow [2024-06-28 02:36:59,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=267, PETRI_PLACES=106, PETRI_TRANSITIONS=40} [2024-06-28 02:36:59,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-28 02:36:59,452 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 40 transitions, 267 flow [2024-06-28 02:36:59,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:59,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:59,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:59,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 02:36:59,452 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:59,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:59,453 INFO L85 PathProgramCache]: Analyzing trace with hash -69500284, now seen corresponding path program 7 times [2024-06-28 02:36:59,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:59,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809331868] [2024-06-28 02:36:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:59,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:59,520 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 02:36:59,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:59,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809331868] [2024-06-28 02:36:59,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809331868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:59,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:59,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:59,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322360755] [2024-06-28 02:36:59,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:59,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:59,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:59,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:59,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 40 transitions, 267 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:59,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:59,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:59,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:59,653 INFO L124 PetriNetUnfolderBase]: 361/668 cut-off events. [2024-06-28 02:36:59,653 INFO L125 PetriNetUnfolderBase]: For 13220/13220 co-relation queries the response was YES. [2024-06-28 02:36:59,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 668 events. 361/668 cut-off events. For 13220/13220 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3288 event pairs, 129 based on Foata normal form. 18/680 useless extension candidates. Maximal degree in co-relation 2859. Up to 290 conditions per place. [2024-06-28 02:36:59,656 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 38 selfloop transitions, 5 changer transitions 8/59 dead transitions. [2024-06-28 02:36:59,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 59 transitions, 487 flow [2024-06-28 02:36:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-28 02:36:59,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-28 02:36:59,657 INFO L175 Difference]: Start difference. First operand has 106 places, 40 transitions, 267 flow. Second operand 7 states and 151 transitions. [2024-06-28 02:36:59,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 59 transitions, 487 flow [2024-06-28 02:36:59,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 59 transitions, 426 flow, removed 23 selfloop flow, removed 15 redundant places. [2024-06-28 02:36:59,663 INFO L231 Difference]: Finished difference. Result has 79 places, 38 transitions, 221 flow [2024-06-28 02:36:59,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=79, PETRI_TRANSITIONS=38} [2024-06-28 02:36:59,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-28 02:36:59,669 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 38 transitions, 221 flow [2024-06-28 02:36:59,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:59,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:59,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:59,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 02:36:59,669 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:59,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:59,670 INFO L85 PathProgramCache]: Analyzing trace with hash -65036284, now seen corresponding path program 8 times [2024-06-28 02:36:59,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:59,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703211054] [2024-06-28 02:36:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:59,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:59,787 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 02:36:59,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:59,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703211054] [2024-06-28 02:36:59,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703211054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:59,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:59,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:59,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002256075] [2024-06-28 02:36:59,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:59,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:59,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:59,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:59,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:36:59,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 38 transitions, 221 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:59,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:59,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:36:59,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:59,913 INFO L124 PetriNetUnfolderBase]: 256/483 cut-off events. [2024-06-28 02:36:59,914 INFO L125 PetriNetUnfolderBase]: For 4099/4099 co-relation queries the response was YES. [2024-06-28 02:36:59,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 483 events. 256/483 cut-off events. For 4099/4099 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2148 event pairs, 111 based on Foata normal form. 18/497 useless extension candidates. Maximal degree in co-relation 1767. Up to 290 conditions per place. [2024-06-28 02:36:59,915 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 25 selfloop transitions, 2 changer transitions 17/52 dead transitions. [2024-06-28 02:36:59,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 52 transitions, 359 flow [2024-06-28 02:36:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-28 02:36:59,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-28 02:36:59,916 INFO L175 Difference]: Start difference. First operand has 79 places, 38 transitions, 221 flow. Second operand 7 states and 145 transitions. [2024-06-28 02:36:59,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 52 transitions, 359 flow [2024-06-28 02:36:59,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 52 transitions, 346 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 02:36:59,919 INFO L231 Difference]: Finished difference. Result has 78 places, 34 transitions, 182 flow [2024-06-28 02:36:59,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=182, PETRI_PLACES=78, PETRI_TRANSITIONS=34} [2024-06-28 02:36:59,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-28 02:36:59,919 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 34 transitions, 182 flow [2024-06-28 02:36:59,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:36:59,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:59,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:59,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 02:36:59,920 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:36:59,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1797295212, now seen corresponding path program 9 times [2024-06-28 02:36:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:59,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459526594] [2024-06-28 02:36:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:59,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:59,992 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 02:36:59,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:59,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459526594] [2024-06-28 02:36:59,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459526594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:59,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:59,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:59,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517922478] [2024-06-28 02:36:59,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:59,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:59,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:59,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:59,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:37:00,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:37:00,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 34 transitions, 182 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:37:00,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:00,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:37:00,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:00,120 INFO L124 PetriNetUnfolderBase]: 310/591 cut-off events. [2024-06-28 02:37:00,121 INFO L125 PetriNetUnfolderBase]: For 4963/4963 co-relation queries the response was YES. [2024-06-28 02:37:00,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2248 conditions, 591 events. 310/591 cut-off events. For 4963/4963 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2833 event pairs, 32 based on Foata normal form. 18/607 useless extension candidates. Maximal degree in co-relation 2221. Up to 211 conditions per place. [2024-06-28 02:37:00,123 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 31 selfloop transitions, 5 changer transitions 8/52 dead transitions. [2024-06-28 02:37:00,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 52 transitions, 372 flow [2024-06-28 02:37:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:37:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:37:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-28 02:37:00,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 02:37:00,124 INFO L175 Difference]: Start difference. First operand has 78 places, 34 transitions, 182 flow. Second operand 7 states and 147 transitions. [2024-06-28 02:37:00,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 52 transitions, 372 flow [2024-06-28 02:37:00,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 52 transitions, 354 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:37:00,126 INFO L231 Difference]: Finished difference. Result has 71 places, 32 transitions, 167 flow [2024-06-28 02:37:00,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=167, PETRI_PLACES=71, PETRI_TRANSITIONS=32} [2024-06-28 02:37:00,127 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-28 02:37:00,127 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 32 transitions, 167 flow [2024-06-28 02:37:00,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:37:00,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:00,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:37:00,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 02:37:00,128 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:37:00,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash -887696970, now seen corresponding path program 10 times [2024-06-28 02:37:00,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:00,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719070336] [2024-06-28 02:37:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:00,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:00,207 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 02:37:00,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:00,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719070336] [2024-06-28 02:37:00,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719070336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:00,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:00,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:37:00,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392647105] [2024-06-28 02:37:00,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:00,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:37:00,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:37:00,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:37:00,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:37:00,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 32 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:37:00,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:00,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:37:00,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:00,332 INFO L124 PetriNetUnfolderBase]: 205/398 cut-off events. [2024-06-28 02:37:00,333 INFO L125 PetriNetUnfolderBase]: For 2725/2725 co-relation queries the response was YES. [2024-06-28 02:37:00,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 398 events. 205/398 cut-off events. For 2725/2725 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1663 event pairs, 58 based on Foata normal form. 18/416 useless extension candidates. Maximal degree in co-relation 1431. Up to 204 conditions per place. [2024-06-28 02:37:00,334 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 21 selfloop transitions, 3 changer transitions 15/47 dead transitions. [2024-06-28 02:37:00,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 47 transitions, 297 flow [2024-06-28 02:37:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:37:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:37:00,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-28 02:37:00,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-28 02:37:00,335 INFO L175 Difference]: Start difference. First operand has 71 places, 32 transitions, 167 flow. Second operand 7 states and 145 transitions. [2024-06-28 02:37:00,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 47 transitions, 297 flow [2024-06-28 02:37:00,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 47 transitions, 280 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 02:37:00,336 INFO L231 Difference]: Finished difference. Result has 69 places, 29 transitions, 138 flow [2024-06-28 02:37:00,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=138, PETRI_PLACES=69, PETRI_TRANSITIONS=29} [2024-06-28 02:37:00,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-28 02:37:00,337 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 29 transitions, 138 flow [2024-06-28 02:37:00,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:37:00,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:00,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:37:00,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 02:37:00,337 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:37:00,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:00,338 INFO L85 PathProgramCache]: Analyzing trace with hash 313994132, now seen corresponding path program 11 times [2024-06-28 02:37:00,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:00,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834368196] [2024-06-28 02:37:00,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:00,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:00,409 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 02:37:00,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:00,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834368196] [2024-06-28 02:37:00,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834368196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:00,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:00,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:37:00,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272519055] [2024-06-28 02:37:00,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:00,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:37:00,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:00,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:37:00,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:37:00,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:37:00,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 29 transitions, 138 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:37:00,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:00,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:37:00,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:00,517 INFO L124 PetriNetUnfolderBase]: 96/207 cut-off events. [2024-06-28 02:37:00,517 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2024-06-28 02:37:00,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 207 events. 96/207 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 666 event pairs, 2 based on Foata normal form. 18/225 useless extension candidates. Maximal degree in co-relation 637. Up to 96 conditions per place. [2024-06-28 02:37:00,518 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-28 02:37:00,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 39 transitions, 222 flow [2024-06-28 02:37:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:37:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:37:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 02:37:00,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-28 02:37:00,519 INFO L175 Difference]: Start difference. First operand has 69 places, 29 transitions, 138 flow. Second operand 7 states and 137 transitions. [2024-06-28 02:37:00,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 39 transitions, 222 flow [2024-06-28 02:37:00,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 39 transitions, 180 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-28 02:37:00,520 INFO L231 Difference]: Finished difference. Result has 55 places, 0 transitions, 0 flow [2024-06-28 02:37:00,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=55, PETRI_TRANSITIONS=0} [2024-06-28 02:37:00,520 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-28 02:37:00,520 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 0 transitions, 0 flow [2024-06-28 02:37:00,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:37:00,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-28 02:37:00,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-28 02:37:00,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-28 02:37:00,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-28 02:37:00,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-28 02:37:00,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-28 02:37:00,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 02:37:00,524 INFO L445 BasicCegarLoop]: Path program histogram: [15, 15, 14, 12, 11, 9, 9, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:37:00,526 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 02:37:00,526 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 02:37:00,529 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-28 02:37:00,529 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-28 02:37:00,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 02:37:00 BasicIcfg [2024-06-28 02:37:00,530 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 02:37:00,530 INFO L158 Benchmark]: Toolchain (without parser) took 137777.79ms. Allocated memory was 144.7MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 67.6MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 892.5MB. Max. memory is 16.1GB. [2024-06-28 02:37:00,530 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 144.7MB. Free memory is still 94.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 02:37:00,530 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 144.7MB. Free memory is still 114.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 02:37:00,530 INFO L158 Benchmark]: CACSL2BoogieTranslator took 445.24ms. Allocated memory was 144.7MB in the beginning and 182.5MB in the end (delta: 37.7MB). Free memory was 67.3MB in the beginning and 137.0MB in the end (delta: -69.7MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. [2024-06-28 02:37:00,531 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.40ms. Allocated memory is still 182.5MB. Free memory was 137.0MB in the beginning and 134.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 02:37:00,531 INFO L158 Benchmark]: Boogie Preprocessor took 28.03ms. Allocated memory is still 182.5MB. Free memory was 134.9MB in the beginning and 131.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 02:37:00,531 INFO L158 Benchmark]: RCFGBuilder took 397.64ms. Allocated memory is still 182.5MB. Free memory was 131.7MB in the beginning and 107.6MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-28 02:37:00,531 INFO L158 Benchmark]: TraceAbstraction took 136872.41ms. Allocated memory was 182.5MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 106.6MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 893.4MB. Max. memory is 16.1GB. [2024-06-28 02:37:00,532 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 144.7MB. Free memory is still 94.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 144.7MB. Free memory is still 114.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 445.24ms. Allocated memory was 144.7MB in the beginning and 182.5MB in the end (delta: 37.7MB). Free memory was 67.3MB in the beginning and 137.0MB in the end (delta: -69.7MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.40ms. Allocated memory is still 182.5MB. Free memory was 137.0MB in the beginning and 134.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.03ms. Allocated memory is still 182.5MB. Free memory was 134.9MB in the beginning and 131.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 397.64ms. Allocated memory is still 182.5MB. Free memory was 131.7MB in the beginning and 107.6MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 136872.41ms. Allocated memory was 182.5MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 106.6MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 893.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 780]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 781]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 65 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 136.8s, OverallIterations: 142, TraceHistogramMax: 1, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 125.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9024 SdHoareTripleChecker+Valid, 14.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7036 mSDsluCounter, 2548 SdHoareTripleChecker+Invalid, 11.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1807 mSDsCounter, 1454 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32225 IncrementalHoareTripleChecker+Invalid, 33679 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1454 mSolverCounterUnsat, 741 mSDtfsCounter, 32225 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 808 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 808 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3130occurred in iteration=98, InterpolantAutomatonStates: 988, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 2706 NumberOfCodeBlocks, 2706 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2564 ConstructedInterpolants, 0 QuantifiedInterpolants, 22316 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 142 InterpolantComputations, 142 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-28 02:37:00,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE