./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_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-rel/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi006_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-eb4cb34-m [2024-06-21 19:14:01,096 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:14:01,199 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:14:01,206 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:14:01,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:14:01,238 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:14:01,238 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:14:01,239 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:14:01,239 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:14:01,243 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:14:01,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:14:01,243 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:14:01,244 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:14:01,246 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:14:01,246 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:14:01,246 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:14:01,247 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:14:01,247 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:14:01,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:14:01,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:14:01,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:14:01,248 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:14:01,248 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:14:01,249 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:14:01,249 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:14:01,249 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:14:01,250 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:14:01,250 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:14:01,251 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:14:01,251 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:14:01,252 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:14:01,252 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:14:01,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:14:01,253 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:14:01,253 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:14:01,253 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:14:01,253 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:14:01,253 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:14:01,254 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:14:01,254 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:14:01,254 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:14:01,254 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:14:01,255 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:14:01,255 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:14:01,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:14:01,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:14:01,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:14:01,521 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:14:01,522 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:14:01,523 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 19:14:02,697 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:14:02,942 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:14:02,943 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 19:14:02,960 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f02b1b67/e9784db0c9fa43afaeb29320b00d1193/FLAGeaad0403a [2024-06-21 19:14:02,979 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f02b1b67/e9784db0c9fa43afaeb29320b00d1193 [2024-06-21 19:14:02,981 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:14:02,982 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:14:02,984 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 19:14:03,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:14:03,067 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:14:03,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:14:03,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:14:03,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:14:03,076 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:14:02" (1/2) ... [2024-06-21 19:14:03,077 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bc440c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:14:03, skipping insertion in model container [2024-06-21 19:14:03,077 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:14:02" (1/2) ... [2024-06-21 19:14:03,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d7085d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:14:03, skipping insertion in model container [2024-06-21 19:14:03,080 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:14:03" (2/2) ... [2024-06-21 19:14:03,081 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bc440c2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03, skipping insertion in model container [2024-06-21 19:14:03,082 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:14:03" (2/2) ... [2024-06-21 19:14:03,082 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:14:03,119 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:14:03,120 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ! multithreaded || ((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:14:03,120 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ! multithreaded || ((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:14:03,121 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ! multithreaded || ((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:14:03,121 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:14:03,122 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-21 19:14:03,175 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:14:03,535 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:14:03,555 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:14:03,675 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:14:03,761 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:14:03,761 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03 WrapperNode [2024-06-21 19:14:03,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:14:03,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:14:03,763 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:14:03,763 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:14:03,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,785 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,823 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-21 19:14:03,830 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:14:03,831 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:14:03,831 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:14:03,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:14:03,842 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,860 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,879 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]. [2024-06-21 19:14:03,889 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,889 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,897 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:14:03,924 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:14:03,925 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:14:03,925 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:14:03,926 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (1/1) ... [2024-06-21 19:14:03,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:14:03,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:14:03,957 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) [2024-06-21 19:14:03,987 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 [2024-06-21 19:14:04,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:14:04,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:14:04,003 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:14:04,003 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:14:04,004 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:14:04,004 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:14:04,004 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:14:04,004 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:14:04,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:14:04,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:14:04,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:14:04,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:14:04,006 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:14:04,166 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:14:04,169 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:14:04,551 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:14:04,552 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:14:04,694 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:14:04,694 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:14:04,695 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:14:04 BoogieIcfgContainer [2024-06-21 19:14:04,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:14:04,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:14:04,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:14:04,703 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:14:04,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:14:02" (1/4) ... [2024-06-21 19:14:04,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655cfc37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:14:04, skipping insertion in model container [2024-06-21 19:14:04,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:14:03" (2/4) ... [2024-06-21 19:14:04,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655cfc37 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:14:04, skipping insertion in model container [2024-06-21 19:14:04,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:03" (3/4) ... [2024-06-21 19:14:04,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655cfc37 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:14:04, skipping insertion in model container [2024-06-21 19:14:04,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:14:04" (4/4) ... [2024-06-21 19:14:04,708 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 19:14:04,725 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:14:04,725 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:14:04,725 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:14:04,768 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:14:04,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 19:14:04,838 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 19:14:04,838 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:14:04,840 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 63 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. [2024-06-21 19:14:04,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 19:14:04,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 19:14:04,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:14:04,864 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;@4e45494b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:14:04,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:14:04,869 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:14:04,869 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:14:04,869 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:14:04,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:04,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:14:04,870 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)] === [2024-06-21 19:14:04,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash 403727084, now seen corresponding path program 1 times [2024-06-21 19:14:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:04,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060651911] [2024-06-21 19:14:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:04,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:05,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:05,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060651911] [2024-06-21 19:14:05,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060651911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:05,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:05,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:14:05,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372984965] [2024-06-21 19:14:05,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:05,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:14:05,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:14:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:14:05,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 19:14:05,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:05,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:05,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 19:14:05,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:05,802 INFO L124 PetriNetUnfolderBase]: 603/1030 cut-off events. [2024-06-21 19:14:05,802 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 19:14:05,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2022 conditions, 1030 events. 603/1030 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5387 event pairs, 376 based on Foata normal form. 1/978 useless extension candidates. Maximal degree in co-relation 2010. Up to 929 conditions per place. [2024-06-21 19:14:05,819 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 19:14:05,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 161 flow [2024-06-21 19:14:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:14:05,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:14:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-21 19:14:05,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 19:14:05,833 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 77 transitions. [2024-06-21 19:14:05,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 161 flow [2024-06-21 19:14:05,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:05,839 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 19:14:05,841 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} [2024-06-21 19:14:05,844 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 19:14:05,845 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 19:14:05,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:05,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:05,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:05,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:14:05,846 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)] === [2024-06-21 19:14:05,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1526065087, now seen corresponding path program 1 times [2024-06-21 19:14:05,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:05,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161227338] [2024-06-21 19:14:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:05,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:06,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161227338] [2024-06-21 19:14:06,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161227338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:06,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:06,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:14:06,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975460686] [2024-06-21 19:14:06,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:06,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:14:06,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:14:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:14:06,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 19:14:06,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:06,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:06,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 19:14:06,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:06,492 INFO L124 PetriNetUnfolderBase]: 755/1275 cut-off events. [2024-06-21 19:14:06,492 INFO L125 PetriNetUnfolderBase]: For 208/213 co-relation queries the response was YES. [2024-06-21 19:14:06,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 1275 events. 755/1275 cut-off events. For 208/213 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6589 event pairs, 242 based on Foata normal form. 13/1251 useless extension candidates. Maximal degree in co-relation 2849. Up to 1093 conditions per place. [2024-06-21 19:14:06,502 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-21 19:14:06,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 218 flow [2024-06-21 19:14:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:14:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:14:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-21 19:14:06,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 19:14:06,507 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 96 transitions. [2024-06-21 19:14:06,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 218 flow [2024-06-21 19:14:06,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:14:06,512 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-21 19:14:06,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-21 19:14:06,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-21 19:14:06,513 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-21 19:14:06,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:06,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:06,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:06,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:14:06,519 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)] === [2024-06-21 19:14:06,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:06,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1494515606, now seen corresponding path program 1 times [2024-06-21 19:14:06,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:06,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896282504] [2024-06-21 19:14:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:06,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:06,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:06,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896282504] [2024-06-21 19:14:06,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896282504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:06,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:06,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:14:06,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511083624] [2024-06-21 19:14:06,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:06,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:14:06,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:06,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:14:06,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:14:06,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 19:14:06,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:06,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:06,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 19:14:06,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:06,978 INFO L124 PetriNetUnfolderBase]: 583/1005 cut-off events. [2024-06-21 19:14:06,979 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-06-21 19:14:06,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 1005 events. 583/1005 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5241 event pairs, 322 based on Foata normal form. 2/984 useless extension candidates. Maximal degree in co-relation 2464. Up to 889 conditions per place. [2024-06-21 19:14:06,986 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 33 selfloop transitions, 7 changer transitions 0/49 dead transitions. [2024-06-21 19:14:06,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 241 flow [2024-06-21 19:14:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:14:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:14:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-21 19:14:06,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 19:14:06,989 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 4 states and 96 transitions. [2024-06-21 19:14:06,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 241 flow [2024-06-21 19:14:06,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 228 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 19:14:06,991 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 148 flow [2024-06-21 19:14:06,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 19:14:06,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 19:14:06,993 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 148 flow [2024-06-21 19:14:06,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:06,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:06,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:06,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:14:06,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:06,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:06,994 INFO L85 PathProgramCache]: Analyzing trace with hash -914655762, now seen corresponding path program 1 times [2024-06-21 19:14:06,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:06,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594599014] [2024-06-21 19:14:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:06,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:07,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:07,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594599014] [2024-06-21 19:14:07,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594599014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:07,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:07,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:14:07,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775523861] [2024-06-21 19:14:07,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:07,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:14:07,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:07,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:14:07,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:14:07,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 19:14:07,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:07,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:07,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 19:14:07,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:07,963 INFO L124 PetriNetUnfolderBase]: 570/992 cut-off events. [2024-06-21 19:14:07,963 INFO L125 PetriNetUnfolderBase]: For 803/803 co-relation queries the response was YES. [2024-06-21 19:14:07,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2656 conditions, 992 events. 570/992 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5143 event pairs, 297 based on Foata normal form. 6/988 useless extension candidates. Maximal degree in co-relation 2641. Up to 843 conditions per place. [2024-06-21 19:14:07,970 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 39 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-06-21 19:14:07,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 300 flow [2024-06-21 19:14:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 19:14:07,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-21 19:14:07,978 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 148 flow. Second operand 5 states and 118 transitions. [2024-06-21 19:14:07,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 300 flow [2024-06-21 19:14:07,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 284 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 19:14:07,982 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 175 flow [2024-06-21 19:14:07,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-21 19:14:07,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-06-21 19:14:07,984 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 175 flow [2024-06-21 19:14:07,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:07,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:07,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:07,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:14:07,985 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)] === [2024-06-21 19:14:07,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:07,987 INFO L85 PathProgramCache]: Analyzing trace with hash 261541075, now seen corresponding path program 1 times [2024-06-21 19:14:07,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:07,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470535767] [2024-06-21 19:14:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:07,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:08,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470535767] [2024-06-21 19:14:08,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470535767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:08,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:08,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143399550] [2024-06-21 19:14:08,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:08,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:08,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:08,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:08,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 19:14:08,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:08,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:08,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 19:14:08,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:08,538 INFO L124 PetriNetUnfolderBase]: 730/1249 cut-off events. [2024-06-21 19:14:08,539 INFO L125 PetriNetUnfolderBase]: For 1471/1481 co-relation queries the response was YES. [2024-06-21 19:14:08,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3532 conditions, 1249 events. 730/1249 cut-off events. For 1471/1481 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6428 event pairs, 206 based on Foata normal form. 10/1240 useless extension candidates. Maximal degree in co-relation 3516. Up to 1048 conditions per place. [2024-06-21 19:14:08,548 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2024-06-21 19:14:08,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 353 flow [2024-06-21 19:14:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-21 19:14:08,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 19:14:08,550 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 175 flow. Second operand 5 states and 115 transitions. [2024-06-21 19:14:08,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 353 flow [2024-06-21 19:14:08,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 328 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:08,554 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 214 flow [2024-06-21 19:14:08,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2024-06-21 19:14:08,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-21 19:14:08,555 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 214 flow [2024-06-21 19:14:08,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:08,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:08,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:08,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:14:08,556 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)] === [2024-06-21 19:14:08,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:08,557 INFO L85 PathProgramCache]: Analyzing trace with hash 261661045, now seen corresponding path program 2 times [2024-06-21 19:14:08,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:08,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881501582] [2024-06-21 19:14:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:08,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:08,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:08,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881501582] [2024-06-21 19:14:08,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881501582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:08,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:08,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:08,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008718659] [2024-06-21 19:14:08,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:08,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:08,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:08,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:08,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:08,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 19:14:08,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:08,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:08,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 19:14:08,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:09,078 INFO L124 PetriNetUnfolderBase]: 750/1289 cut-off events. [2024-06-21 19:14:09,078 INFO L125 PetriNetUnfolderBase]: For 2138/2141 co-relation queries the response was YES. [2024-06-21 19:14:09,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3891 conditions, 1289 events. 750/1289 cut-off events. For 2138/2141 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6718 event pairs, 187 based on Foata normal form. 2/1271 useless extension candidates. Maximal degree in co-relation 3874. Up to 1019 conditions per place. [2024-06-21 19:14:09,088 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 18 changer transitions 0/69 dead transitions. [2024-06-21 19:14:09,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 438 flow [2024-06-21 19:14:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 19:14:09,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-21 19:14:09,090 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 214 flow. Second operand 5 states and 118 transitions. [2024-06-21 19:14:09,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 438 flow [2024-06-21 19:14:09,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 428 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-21 19:14:09,095 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 294 flow [2024-06-21 19:14:09,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-21 19:14:09,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-21 19:14:09,096 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 294 flow [2024-06-21 19:14:09,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:09,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:09,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:09,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:14:09,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:09,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:09,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1297703964, now seen corresponding path program 1 times [2024-06-21 19:14:09,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:09,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590587748] [2024-06-21 19:14:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:09,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:09,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:09,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590587748] [2024-06-21 19:14:09,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590587748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:09,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:09,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:14:09,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948891475] [2024-06-21 19:14:09,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:09,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:14:09,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:09,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:14:09,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:14:09,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:14:09,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:09,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:09,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:14:09,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:09,628 INFO L124 PetriNetUnfolderBase]: 901/1503 cut-off events. [2024-06-21 19:14:09,629 INFO L125 PetriNetUnfolderBase]: For 3951/3951 co-relation queries the response was YES. [2024-06-21 19:14:09,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4923 conditions, 1503 events. 901/1503 cut-off events. For 3951/3951 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7684 event pairs, 502 based on Foata normal form. 3/1501 useless extension candidates. Maximal degree in co-relation 4902. Up to 1364 conditions per place. [2024-06-21 19:14:09,642 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 52 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-06-21 19:14:09,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 470 flow [2024-06-21 19:14:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 19:14:09,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-21 19:14:09,644 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 294 flow. Second operand 5 states and 91 transitions. [2024-06-21 19:14:09,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 470 flow [2024-06-21 19:14:09,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 445 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 19:14:09,652 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 343 flow [2024-06-21 19:14:09,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-21 19:14:09,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-21 19:14:09,653 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 343 flow [2024-06-21 19:14:09,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:09,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:09,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:09,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:14:09,654 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)] === [2024-06-21 19:14:09,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1288096152, now seen corresponding path program 1 times [2024-06-21 19:14:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:09,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473040240] [2024-06-21 19:14:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:09,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:10,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:10,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473040240] [2024-06-21 19:14:10,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473040240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:10,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:10,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:10,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367706524] [2024-06-21 19:14:10,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:10,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:10,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:10,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:10,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:14:10,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 343 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 19:14:10,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:10,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:14:10,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:10,444 INFO L124 PetriNetUnfolderBase]: 789/1357 cut-off events. [2024-06-21 19:14:10,445 INFO L125 PetriNetUnfolderBase]: For 3782/3797 co-relation queries the response was YES. [2024-06-21 19:14:10,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4723 conditions, 1357 events. 789/1357 cut-off events. For 3782/3797 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7146 event pairs, 182 based on Foata normal form. 16/1368 useless extension candidates. Maximal degree in co-relation 4696. Up to 1089 conditions per place. [2024-06-21 19:14:10,455 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 24 changer transitions 0/93 dead transitions. [2024-06-21 19:14:10,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 644 flow [2024-06-21 19:14:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 19:14:10,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-21 19:14:10,457 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 343 flow. Second operand 7 states and 145 transitions. [2024-06-21 19:14:10,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 644 flow [2024-06-21 19:14:10,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 642 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 19:14:10,465 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 476 flow [2024-06-21 19:14:10,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-21 19:14:10,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-21 19:14:10,467 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 476 flow [2024-06-21 19:14:10,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 19:14:10,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:10,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:10,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:14:10,467 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)] === [2024-06-21 19:14:10,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:10,468 INFO L85 PathProgramCache]: Analyzing trace with hash 866189828, now seen corresponding path program 2 times [2024-06-21 19:14:10,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:10,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347988698] [2024-06-21 19:14:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:10,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:10,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:10,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347988698] [2024-06-21 19:14:10,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347988698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:10,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:10,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:10,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923036642] [2024-06-21 19:14:10,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:10,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:10,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:10,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:10,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:10,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:14:10,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:10,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:10,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:14:10,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:11,020 INFO L124 PetriNetUnfolderBase]: 846/1455 cut-off events. [2024-06-21 19:14:11,020 INFO L125 PetriNetUnfolderBase]: For 5073/5077 co-relation queries the response was YES. [2024-06-21 19:14:11,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5463 conditions, 1455 events. 846/1455 cut-off events. For 5073/5077 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7756 event pairs, 168 based on Foata normal form. 8/1458 useless extension candidates. Maximal degree in co-relation 5431. Up to 1112 conditions per place. [2024-06-21 19:14:11,032 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 51 selfloop transitions, 36 changer transitions 0/94 dead transitions. [2024-06-21 19:14:11,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 804 flow [2024-06-21 19:14:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-21 19:14:11,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-21 19:14:11,034 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 476 flow. Second operand 5 states and 112 transitions. [2024-06-21 19:14:11,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 804 flow [2024-06-21 19:14:11,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 737 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:11,047 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 632 flow [2024-06-21 19:14:11,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=632, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2024-06-21 19:14:11,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 19:14:11,048 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 632 flow [2024-06-21 19:14:11,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:11,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:11,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:11,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:14:11,049 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)] === [2024-06-21 19:14:11,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:11,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1306327007, now seen corresponding path program 1 times [2024-06-21 19:14:11,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:11,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191670114] [2024-06-21 19:14:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:11,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:11,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191670114] [2024-06-21 19:14:11,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191670114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:11,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:11,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472423397] [2024-06-21 19:14:11,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:11,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:11,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:11,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 19:14:11,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 632 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:11,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:11,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 19:14:11,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:12,113 INFO L124 PetriNetUnfolderBase]: 932/1620 cut-off events. [2024-06-21 19:14:12,113 INFO L125 PetriNetUnfolderBase]: For 7288/7292 co-relation queries the response was YES. [2024-06-21 19:14:12,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1620 events. 932/1620 cut-off events. For 7288/7292 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9084 event pairs, 215 based on Foata normal form. 26/1631 useless extension candidates. Maximal degree in co-relation 6248. Up to 1192 conditions per place. [2024-06-21 19:14:12,127 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 69 selfloop transitions, 25 changer transitions 0/102 dead transitions. [2024-06-21 19:14:12,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 918 flow [2024-06-21 19:14:12,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 19:14:12,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 19:14:12,129 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 632 flow. Second operand 6 states and 138 transitions. [2024-06-21 19:14:12,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 918 flow [2024-06-21 19:14:12,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 102 transitions, 885 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 19:14:12,143 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 672 flow [2024-06-21 19:14:12,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=672, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-06-21 19:14:12,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-21 19:14:12,144 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 672 flow [2024-06-21 19:14:12,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:12,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:12,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:12,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:14:12,145 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)] === [2024-06-21 19:14:12,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:12,146 INFO L85 PathProgramCache]: Analyzing trace with hash -482164434, now seen corresponding path program 3 times [2024-06-21 19:14:12,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:12,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308601845] [2024-06-21 19:14:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:12,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:12,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:12,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308601845] [2024-06-21 19:14:12,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308601845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:12,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:12,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:12,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376331851] [2024-06-21 19:14:12,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:12,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:12,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:12,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 19:14:12,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:12,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:12,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 19:14:12,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:12,854 INFO L124 PetriNetUnfolderBase]: 924/1576 cut-off events. [2024-06-21 19:14:12,855 INFO L125 PetriNetUnfolderBase]: For 8442/8446 co-relation queries the response was YES. [2024-06-21 19:14:12,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6318 conditions, 1576 events. 924/1576 cut-off events. For 8442/8446 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8737 event pairs, 297 based on Foata normal form. 8/1571 useless extension candidates. Maximal degree in co-relation 6282. Up to 1227 conditions per place. [2024-06-21 19:14:12,875 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 57 selfloop transitions, 30 changer transitions 0/95 dead transitions. [2024-06-21 19:14:12,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 905 flow [2024-06-21 19:14:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-21 19:14:12,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-21 19:14:12,877 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 672 flow. Second operand 5 states and 116 transitions. [2024-06-21 19:14:12,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 905 flow [2024-06-21 19:14:12,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 846 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:12,902 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 694 flow [2024-06-21 19:14:12,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=694, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2024-06-21 19:14:12,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-21 19:14:12,903 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 694 flow [2024-06-21 19:14:12,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:12,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:12,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:12,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:14:12,904 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)] === [2024-06-21 19:14:12,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:12,905 INFO L85 PathProgramCache]: Analyzing trace with hash -478435909, now seen corresponding path program 2 times [2024-06-21 19:14:12,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:12,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097508630] [2024-06-21 19:14:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:12,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:13,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:13,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097508630] [2024-06-21 19:14:13,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097508630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:13,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:13,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:13,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117085494] [2024-06-21 19:14:13,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:13,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:13,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:13,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 19:14:13,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 694 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:13,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:13,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 19:14:13,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:13,840 INFO L124 PetriNetUnfolderBase]: 952/1653 cut-off events. [2024-06-21 19:14:13,840 INFO L125 PetriNetUnfolderBase]: For 9061/9061 co-relation queries the response was YES. [2024-06-21 19:14:13,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6629 conditions, 1653 events. 952/1653 cut-off events. For 9061/9061 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9246 event pairs, 108 based on Foata normal form. 6/1653 useless extension candidates. Maximal degree in co-relation 6592. Up to 771 conditions per place. [2024-06-21 19:14:13,854 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 41 changer transitions 0/109 dead transitions. [2024-06-21 19:14:13,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 109 transitions, 1036 flow [2024-06-21 19:14:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-21 19:14:13,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-21 19:14:13,856 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 694 flow. Second operand 7 states and 159 transitions. [2024-06-21 19:14:13,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 109 transitions, 1036 flow [2024-06-21 19:14:13,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 957 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:13,875 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 735 flow [2024-06-21 19:14:13,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=735, PETRI_PLACES=81, PETRI_TRANSITIONS=81} [2024-06-21 19:14:13,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-21 19:14:13,876 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 735 flow [2024-06-21 19:14:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:13,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:13,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:14:13,877 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)] === [2024-06-21 19:14:13,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash -478441644, now seen corresponding path program 4 times [2024-06-21 19:14:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:13,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876900905] [2024-06-21 19:14:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:14,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:14,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876900905] [2024-06-21 19:14:14,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876900905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:14,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:14,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:14,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545142999] [2024-06-21 19:14:14,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:14,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:14,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:14,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 19:14:14,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 81 transitions, 735 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:14,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:14,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 19:14:14,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:14,905 INFO L124 PetriNetUnfolderBase]: 997/1753 cut-off events. [2024-06-21 19:14:14,906 INFO L125 PetriNetUnfolderBase]: For 10681/10681 co-relation queries the response was YES. [2024-06-21 19:14:14,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7193 conditions, 1753 events. 997/1753 cut-off events. For 10681/10681 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10108 event pairs, 232 based on Foata normal form. 22/1764 useless extension candidates. Maximal degree in co-relation 7155. Up to 1170 conditions per place. [2024-06-21 19:14:14,917 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 65 selfloop transitions, 37 changer transitions 0/110 dead transitions. [2024-06-21 19:14:14,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 110 transitions, 1085 flow [2024-06-21 19:14:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 19:14:14,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 19:14:14,920 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 735 flow. Second operand 6 states and 141 transitions. [2024-06-21 19:14:14,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 110 transitions, 1085 flow [2024-06-21 19:14:14,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 1001 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:14,942 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 834 flow [2024-06-21 19:14:14,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=834, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-06-21 19:14:14,943 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-21 19:14:14,943 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 834 flow [2024-06-21 19:14:14,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:14,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:14,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:14,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:14:14,944 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:14,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1074038030, now seen corresponding path program 1 times [2024-06-21 19:14:14,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:14,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142432889] [2024-06-21 19:14:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:14,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:15,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:15,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142432889] [2024-06-21 19:14:15,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142432889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:15,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:15,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:15,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704055592] [2024-06-21 19:14:15,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:15,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:15,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:15,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 19:14:15,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 834 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 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) [2024-06-21 19:14:15,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:15,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 19:14:15,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:16,139 INFO L124 PetriNetUnfolderBase]: 1038/1839 cut-off events. [2024-06-21 19:14:16,140 INFO L125 PetriNetUnfolderBase]: For 14230/14234 co-relation queries the response was YES. [2024-06-21 19:14:16,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7821 conditions, 1839 events. 1038/1839 cut-off events. For 14230/14234 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10951 event pairs, 256 based on Foata normal form. 16/1842 useless extension candidates. Maximal degree in co-relation 7780. Up to 1196 conditions per place. [2024-06-21 19:14:16,155 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 71 selfloop transitions, 33 changer transitions 0/112 dead transitions. [2024-06-21 19:14:16,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 1150 flow [2024-06-21 19:14:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 19:14:16,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-21 19:14:16,157 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 834 flow. Second operand 6 states and 139 transitions. [2024-06-21 19:14:16,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 1150 flow [2024-06-21 19:14:16,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 112 transitions, 1103 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-21 19:14:16,189 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 887 flow [2024-06-21 19:14:16,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=887, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2024-06-21 19:14:16,189 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-21 19:14:16,190 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 887 flow [2024-06-21 19:14:16,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 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) [2024-06-21 19:14:16,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:16,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:16,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:14:16,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:16,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1946610738, now seen corresponding path program 2 times [2024-06-21 19:14:16,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:16,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594378126] [2024-06-21 19:14:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:17,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:17,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594378126] [2024-06-21 19:14:17,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594378126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:17,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:17,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:17,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751828862] [2024-06-21 19:14:17,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:17,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:17,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:17,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 19:14:17,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 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) [2024-06-21 19:14:17,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:17,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 19:14:17,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:17,667 INFO L124 PetriNetUnfolderBase]: 1034/1853 cut-off events. [2024-06-21 19:14:17,668 INFO L125 PetriNetUnfolderBase]: For 14721/14721 co-relation queries the response was YES. [2024-06-21 19:14:17,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7783 conditions, 1853 events. 1034/1853 cut-off events. For 14721/14721 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11076 event pairs, 91 based on Foata normal form. 24/1871 useless extension candidates. Maximal degree in co-relation 7740. Up to 796 conditions per place. [2024-06-21 19:14:17,683 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 70 selfloop transitions, 46 changer transitions 0/124 dead transitions. [2024-06-21 19:14:17,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 1238 flow [2024-06-21 19:14:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 19:14:17,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-21 19:14:17,685 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 887 flow. Second operand 8 states and 182 transitions. [2024-06-21 19:14:17,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 1238 flow [2024-06-21 19:14:17,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 124 transitions, 1161 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:17,714 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 916 flow [2024-06-21 19:14:17,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=916, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2024-06-21 19:14:17,715 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-21 19:14:17,715 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 916 flow [2024-06-21 19:14:17,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 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) [2024-06-21 19:14:17,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:17,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:17,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:14:17,716 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)] === [2024-06-21 19:14:17,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:17,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2133031907, now seen corresponding path program 1 times [2024-06-21 19:14:17,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:17,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835756925] [2024-06-21 19:14:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:17,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:17,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:17,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835756925] [2024-06-21 19:14:17,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835756925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:17,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:17,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:17,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645513733] [2024-06-21 19:14:17,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:17,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:17,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:17,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:14:17,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 916 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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) [2024-06-21 19:14:17,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:17,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:14:17,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:18,372 INFO L124 PetriNetUnfolderBase]: 1266/2167 cut-off events. [2024-06-21 19:14:18,373 INFO L125 PetriNetUnfolderBase]: For 17369/17373 co-relation queries the response was YES. [2024-06-21 19:14:18,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9319 conditions, 2167 events. 1266/2167 cut-off events. For 17369/17373 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12615 event pairs, 547 based on Foata normal form. 7/2166 useless extension candidates. Maximal degree in co-relation 9273. Up to 1941 conditions per place. [2024-06-21 19:14:18,390 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 80 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-21 19:14:18,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 100 transitions, 1153 flow [2024-06-21 19:14:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 19:14:18,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-21 19:14:18,391 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 916 flow. Second operand 6 states and 103 transitions. [2024-06-21 19:14:18,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 100 transitions, 1153 flow [2024-06-21 19:14:18,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 100 transitions, 1017 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:18,430 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 849 flow [2024-06-21 19:14:18,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=849, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2024-06-21 19:14:18,431 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-21 19:14:18,431 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 849 flow [2024-06-21 19:14:18,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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) [2024-06-21 19:14:18,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:18,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:18,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:14:18,432 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:18,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1855375941, now seen corresponding path program 2 times [2024-06-21 19:14:18,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:18,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677787764] [2024-06-21 19:14:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:18,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:18,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677787764] [2024-06-21 19:14:18,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677787764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:18,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:18,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:18,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072151162] [2024-06-21 19:14:18,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:18,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:18,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:18,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:14:18,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 849 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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) [2024-06-21 19:14:18,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:18,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:14:18,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:19,165 INFO L124 PetriNetUnfolderBase]: 1258/2156 cut-off events. [2024-06-21 19:14:19,166 INFO L125 PetriNetUnfolderBase]: For 14878/14882 co-relation queries the response was YES. [2024-06-21 19:14:19,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8732 conditions, 2156 events. 1258/2156 cut-off events. For 14878/14882 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12564 event pairs, 547 based on Foata normal form. 7/2155 useless extension candidates. Maximal degree in co-relation 8685. Up to 1917 conditions per place. [2024-06-21 19:14:19,182 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 83 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-21 19:14:19,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 1099 flow [2024-06-21 19:14:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 19:14:19,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 19:14:19,184 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 849 flow. Second operand 6 states and 108 transitions. [2024-06-21 19:14:19,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 1099 flow [2024-06-21 19:14:19,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 105 transitions, 1065 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:19,211 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 878 flow [2024-06-21 19:14:19,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=878, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2024-06-21 19:14:19,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 19:14:19,212 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 878 flow [2024-06-21 19:14:19,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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) [2024-06-21 19:14:19,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:19,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:19,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:14:19,213 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:19,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1546350907, now seen corresponding path program 1 times [2024-06-21 19:14:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:19,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216331089] [2024-06-21 19:14:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:19,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:19,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216331089] [2024-06-21 19:14:19,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216331089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:19,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:19,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:14:19,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086676366] [2024-06-21 19:14:19,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:19,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:14:19,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:19,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:14:19,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:14:19,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:19,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 878 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:19,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:19,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:19,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:19,780 INFO L124 PetriNetUnfolderBase]: 1263/2169 cut-off events. [2024-06-21 19:14:19,781 INFO L125 PetriNetUnfolderBase]: For 16694/16694 co-relation queries the response was YES. [2024-06-21 19:14:19,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8864 conditions, 2169 events. 1263/2169 cut-off events. For 16694/16694 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12739 event pairs, 736 based on Foata normal form. 1/2161 useless extension candidates. Maximal degree in co-relation 8816. Up to 1951 conditions per place. [2024-06-21 19:14:19,799 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 94 selfloop transitions, 15 changer transitions 0/116 dead transitions. [2024-06-21 19:14:19,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 116 transitions, 1237 flow [2024-06-21 19:14:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-21 19:14:19,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-06-21 19:14:19,801 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 878 flow. Second operand 5 states and 107 transitions. [2024-06-21 19:14:19,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 116 transitions, 1237 flow [2024-06-21 19:14:19,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 116 transitions, 1197 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:19,827 INFO L231 Difference]: Finished difference. Result has 101 places, 104 transitions, 973 flow [2024-06-21 19:14:19,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=973, PETRI_PLACES=101, PETRI_TRANSITIONS=104} [2024-06-21 19:14:19,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-21 19:14:19,828 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 104 transitions, 973 flow [2024-06-21 19:14:19,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:19,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:19,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:19,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:14:19,829 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:19,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:19,829 INFO L85 PathProgramCache]: Analyzing trace with hash 357323947, now seen corresponding path program 2 times [2024-06-21 19:14:19,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:19,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048846507] [2024-06-21 19:14:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:19,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:20,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:20,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048846507] [2024-06-21 19:14:20,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048846507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:20,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:20,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:14:20,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350027722] [2024-06-21 19:14:20,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:20,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:14:20,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:20,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:14:20,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:14:20,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:20,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 104 transitions, 973 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:20,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:20,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:20,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:20,347 INFO L124 PetriNetUnfolderBase]: 1260/2165 cut-off events. [2024-06-21 19:14:20,348 INFO L125 PetriNetUnfolderBase]: For 18062/18062 co-relation queries the response was YES. [2024-06-21 19:14:20,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9128 conditions, 2165 events. 1260/2165 cut-off events. For 18062/18062 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12752 event pairs, 737 based on Foata normal form. 1/2156 useless extension candidates. Maximal degree in co-relation 9077. Up to 1960 conditions per place. [2024-06-21 19:14:20,366 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 95 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-06-21 19:14:20,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 113 transitions, 1216 flow [2024-06-21 19:14:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-21 19:14:20,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-06-21 19:14:20,369 INFO L175 Difference]: Start difference. First operand has 101 places, 104 transitions, 973 flow. Second operand 5 states and 101 transitions. [2024-06-21 19:14:20,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 113 transitions, 1216 flow [2024-06-21 19:14:20,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 1202 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-21 19:14:20,401 INFO L231 Difference]: Finished difference. Result has 106 places, 105 transitions, 996 flow [2024-06-21 19:14:20,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=996, PETRI_PLACES=106, PETRI_TRANSITIONS=105} [2024-06-21 19:14:20,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-21 19:14:20,402 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 105 transitions, 996 flow [2024-06-21 19:14:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:20,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:20,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:20,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:14:20,402 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:20,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1324994521, now seen corresponding path program 1 times [2024-06-21 19:14:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:20,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086440242] [2024-06-21 19:14:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:20,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:20,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:20,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086440242] [2024-06-21 19:14:20,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086440242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:20,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:20,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:20,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908268710] [2024-06-21 19:14:20,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:20,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:20,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:20,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:20,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:20,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:14:20,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 996 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-21 19:14:20,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:20,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:14:20,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:21,210 INFO L124 PetriNetUnfolderBase]: 1360/2328 cut-off events. [2024-06-21 19:14:21,211 INFO L125 PetriNetUnfolderBase]: For 22760/22768 co-relation queries the response was YES. [2024-06-21 19:14:21,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10081 conditions, 2328 events. 1360/2328 cut-off events. For 22760/22768 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13726 event pairs, 383 based on Foata normal form. 17/2335 useless extension candidates. Maximal degree in co-relation 10026. Up to 1863 conditions per place. [2024-06-21 19:14:21,232 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 38 changer transitions 0/149 dead transitions. [2024-06-21 19:14:21,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 1539 flow [2024-06-21 19:14:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:14:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:14:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-21 19:14:21,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 19:14:21,235 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 996 flow. Second operand 11 states and 195 transitions. [2024-06-21 19:14:21,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 1539 flow [2024-06-21 19:14:21,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 149 transitions, 1514 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:21,277 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 1147 flow [2024-06-21 19:14:21,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1147, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2024-06-21 19:14:21,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-21 19:14:21,279 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 1147 flow [2024-06-21 19:14:21,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-21 19:14:21,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:21,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:21,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:14:21,280 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:21,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1699807355, now seen corresponding path program 2 times [2024-06-21 19:14:21,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:21,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424432155] [2024-06-21 19:14:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:21,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:21,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424432155] [2024-06-21 19:14:21,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424432155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:21,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:21,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:21,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838131600] [2024-06-21 19:14:21,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:21,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:21,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:21,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:21,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:14:21,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 1147 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-21 19:14:21,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:21,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:14:21,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:22,189 INFO L124 PetriNetUnfolderBase]: 1488/2542 cut-off events. [2024-06-21 19:14:22,189 INFO L125 PetriNetUnfolderBase]: For 29404/29408 co-relation queries the response was YES. [2024-06-21 19:14:22,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12089 conditions, 2542 events. 1488/2542 cut-off events. For 29404/29408 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15284 event pairs, 322 based on Foata normal form. 13/2545 useless extension candidates. Maximal degree in co-relation 12031. Up to 1932 conditions per place. [2024-06-21 19:14:22,220 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 109 selfloop transitions, 44 changer transitions 0/159 dead transitions. [2024-06-21 19:14:22,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 159 transitions, 1864 flow [2024-06-21 19:14:22,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 19:14:22,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 19:14:22,222 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 1147 flow. Second operand 9 states and 159 transitions. [2024-06-21 19:14:22,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 159 transitions, 1864 flow [2024-06-21 19:14:22,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 159 transitions, 1757 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:22,288 INFO L231 Difference]: Finished difference. Result has 120 places, 124 transitions, 1310 flow [2024-06-21 19:14:22,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1310, PETRI_PLACES=120, PETRI_TRANSITIONS=124} [2024-06-21 19:14:22,289 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 19:14:22,289 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 124 transitions, 1310 flow [2024-06-21 19:14:22,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-21 19:14:22,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:22,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:22,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:14:22,290 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:22,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1670879705, now seen corresponding path program 3 times [2024-06-21 19:14:22,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:22,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406766047] [2024-06-21 19:14:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:22,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:22,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:22,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406766047] [2024-06-21 19:14:22,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406766047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:22,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:22,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:22,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363802062] [2024-06-21 19:14:22,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:22,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:22,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:22,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:14:22,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 124 transitions, 1310 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-21 19:14:22,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:22,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:14:22,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:23,053 INFO L124 PetriNetUnfolderBase]: 1462/2505 cut-off events. [2024-06-21 19:14:23,053 INFO L125 PetriNetUnfolderBase]: For 29536/29536 co-relation queries the response was YES. [2024-06-21 19:14:23,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11817 conditions, 2505 events. 1462/2505 cut-off events. For 29536/29536 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15006 event pairs, 308 based on Foata normal form. 11/2506 useless extension candidates. Maximal degree in co-relation 11758. Up to 1921 conditions per place. [2024-06-21 19:14:23,077 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 43 changer transitions 0/144 dead transitions. [2024-06-21 19:14:23,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 144 transitions, 1722 flow [2024-06-21 19:14:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 19:14:23,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 19:14:23,079 INFO L175 Difference]: Start difference. First operand has 120 places, 124 transitions, 1310 flow. Second operand 7 states and 123 transitions. [2024-06-21 19:14:23,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 144 transitions, 1722 flow [2024-06-21 19:14:23,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 144 transitions, 1641 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:23,142 INFO L231 Difference]: Finished difference. Result has 124 places, 124 transitions, 1324 flow [2024-06-21 19:14:23,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=124, PETRI_TRANSITIONS=124} [2024-06-21 19:14:23,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 19:14:23,143 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 124 transitions, 1324 flow [2024-06-21 19:14:23,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-21 19:14:23,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:23,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:23,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:14:23,144 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:23,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:23,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1682078711, now seen corresponding path program 4 times [2024-06-21 19:14:23,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:23,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200786336] [2024-06-21 19:14:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:23,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:23,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:23,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200786336] [2024-06-21 19:14:23,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200786336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:23,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:23,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:23,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121694517] [2024-06-21 19:14:23,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:23,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:23,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:23,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:14:23,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 124 transitions, 1324 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-21 19:14:23,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:23,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:14:23,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:23,908 INFO L124 PetriNetUnfolderBase]: 1441/2475 cut-off events. [2024-06-21 19:14:23,908 INFO L125 PetriNetUnfolderBase]: For 29311/29311 co-relation queries the response was YES. [2024-06-21 19:14:23,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11422 conditions, 2475 events. 1441/2475 cut-off events. For 29311/29311 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14790 event pairs, 312 based on Foata normal form. 9/2474 useless extension candidates. Maximal degree in co-relation 11362. Up to 1839 conditions per place. [2024-06-21 19:14:23,927 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 94 selfloop transitions, 45 changer transitions 0/145 dead transitions. [2024-06-21 19:14:23,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 145 transitions, 1738 flow [2024-06-21 19:14:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 19:14:23,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-21 19:14:23,930 INFO L175 Difference]: Start difference. First operand has 124 places, 124 transitions, 1324 flow. Second operand 7 states and 127 transitions. [2024-06-21 19:14:23,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 145 transitions, 1738 flow [2024-06-21 19:14:23,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 145 transitions, 1652 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:23,989 INFO L231 Difference]: Finished difference. Result has 125 places, 124 transitions, 1334 flow [2024-06-21 19:14:23,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1334, PETRI_PLACES=125, PETRI_TRANSITIONS=124} [2024-06-21 19:14:23,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-21 19:14:23,990 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 124 transitions, 1334 flow [2024-06-21 19:14:23,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-21 19:14:23,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:23,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:23,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:14:23,991 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)] === [2024-06-21 19:14:23,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash 692233079, now seen corresponding path program 1 times [2024-06-21 19:14:23,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:23,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279370611] [2024-06-21 19:14:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:23,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:24,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:24,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279370611] [2024-06-21 19:14:24,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279370611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:24,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:24,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:24,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030398912] [2024-06-21 19:14:24,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:24,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:24,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:24,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:24,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:24,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:24,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 124 transitions, 1334 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:24,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:24,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:24,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:24,958 INFO L124 PetriNetUnfolderBase]: 1488/2552 cut-off events. [2024-06-21 19:14:24,958 INFO L125 PetriNetUnfolderBase]: For 33049/33049 co-relation queries the response was YES. [2024-06-21 19:14:24,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11873 conditions, 2552 events. 1488/2552 cut-off events. For 33049/33049 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15554 event pairs, 807 based on Foata normal form. 5/2546 useless extension candidates. Maximal degree in co-relation 11812. Up to 2239 conditions per place. [2024-06-21 19:14:24,974 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 124 selfloop transitions, 21 changer transitions 0/152 dead transitions. [2024-06-21 19:14:24,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 152 transitions, 1786 flow [2024-06-21 19:14:24,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 19:14:24,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:14:24,975 INFO L175 Difference]: Start difference. First operand has 125 places, 124 transitions, 1334 flow. Second operand 7 states and 147 transitions. [2024-06-21 19:14:24,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 152 transitions, 1786 flow [2024-06-21 19:14:25,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 152 transitions, 1688 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:25,053 INFO L231 Difference]: Finished difference. Result has 128 places, 129 transitions, 1319 flow [2024-06-21 19:14:25,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1319, PETRI_PLACES=128, PETRI_TRANSITIONS=129} [2024-06-21 19:14:25,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-21 19:14:25,053 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 129 transitions, 1319 flow [2024-06-21 19:14:25,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:25,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:25,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:25,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:14:25,054 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)] === [2024-06-21 19:14:25,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:25,055 INFO L85 PathProgramCache]: Analyzing trace with hash -767341096, now seen corresponding path program 1 times [2024-06-21 19:14:25,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:25,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026834696] [2024-06-21 19:14:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:25,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:25,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:25,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026834696] [2024-06-21 19:14:25,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026834696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:25,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:25,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:25,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446043536] [2024-06-21 19:14:25,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:25,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:25,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:25,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:25,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:14:25,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 129 transitions, 1319 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:25,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:25,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:14:25,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:25,805 INFO L124 PetriNetUnfolderBase]: 1483/2547 cut-off events. [2024-06-21 19:14:25,805 INFO L125 PetriNetUnfolderBase]: For 32740/32740 co-relation queries the response was YES. [2024-06-21 19:14:25,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11902 conditions, 2547 events. 1483/2547 cut-off events. For 32740/32740 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15551 event pairs, 802 based on Foata normal form. 2/2538 useless extension candidates. Maximal degree in co-relation 11839. Up to 2289 conditions per place. [2024-06-21 19:14:25,827 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 120 selfloop transitions, 15 changer transitions 0/141 dead transitions. [2024-06-21 19:14:25,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 141 transitions, 1635 flow [2024-06-21 19:14:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 19:14:25,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 19:14:25,828 INFO L175 Difference]: Start difference. First operand has 128 places, 129 transitions, 1319 flow. Second operand 6 states and 110 transitions. [2024-06-21 19:14:25,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 141 transitions, 1635 flow [2024-06-21 19:14:25,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 141 transitions, 1612 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:25,878 INFO L231 Difference]: Finished difference. Result has 131 places, 131 transitions, 1357 flow [2024-06-21 19:14:25,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1357, PETRI_PLACES=131, PETRI_TRANSITIONS=131} [2024-06-21 19:14:25,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-21 19:14:25,879 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 131 transitions, 1357 flow [2024-06-21 19:14:25,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:25,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:25,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:25,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:14:25,880 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)] === [2024-06-21 19:14:25,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1681893796, now seen corresponding path program 2 times [2024-06-21 19:14:25,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:25,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422136574] [2024-06-21 19:14:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:25,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:26,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:26,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422136574] [2024-06-21 19:14:26,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422136574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:26,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:26,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:26,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944524485] [2024-06-21 19:14:26,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:26,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:26,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:26,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:26,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:26,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:26,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 131 transitions, 1357 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:26,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:26,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:26,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:26,578 INFO L124 PetriNetUnfolderBase]: 1478/2538 cut-off events. [2024-06-21 19:14:26,578 INFO L125 PetriNetUnfolderBase]: For 34382/34382 co-relation queries the response was YES. [2024-06-21 19:14:26,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12014 conditions, 2538 events. 1478/2538 cut-off events. For 34382/34382 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15457 event pairs, 802 based on Foata normal form. 2/2529 useless extension candidates. Maximal degree in co-relation 11949. Up to 2290 conditions per place. [2024-06-21 19:14:26,596 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 123 selfloop transitions, 12 changer transitions 0/142 dead transitions. [2024-06-21 19:14:26,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 142 transitions, 1672 flow [2024-06-21 19:14:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-21 19:14:26,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-21 19:14:26,597 INFO L175 Difference]: Start difference. First operand has 131 places, 131 transitions, 1357 flow. Second operand 5 states and 102 transitions. [2024-06-21 19:14:26,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 142 transitions, 1672 flow [2024-06-21 19:14:26,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 142 transitions, 1639 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:26,646 INFO L231 Difference]: Finished difference. Result has 132 places, 133 transitions, 1378 flow [2024-06-21 19:14:26,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1378, PETRI_PLACES=132, PETRI_TRANSITIONS=133} [2024-06-21 19:14:26,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-21 19:14:26,647 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 133 transitions, 1378 flow [2024-06-21 19:14:26,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:26,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:26,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:26,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:14:26,647 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)] === [2024-06-21 19:14:26,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:26,648 INFO L85 PathProgramCache]: Analyzing trace with hash 898892099, now seen corresponding path program 2 times [2024-06-21 19:14:26,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:26,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521293999] [2024-06-21 19:14:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:26,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:27,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:27,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521293999] [2024-06-21 19:14:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521293999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:27,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:27,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:27,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022943472] [2024-06-21 19:14:27,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:27,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:27,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:27,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:27,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 133 transitions, 1378 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:27,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:27,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:27,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:27,539 INFO L124 PetriNetUnfolderBase]: 1470/2529 cut-off events. [2024-06-21 19:14:27,539 INFO L125 PetriNetUnfolderBase]: For 36002/36002 co-relation queries the response was YES. [2024-06-21 19:14:27,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12022 conditions, 2529 events. 1470/2529 cut-off events. For 36002/36002 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15424 event pairs, 804 based on Foata normal form. 3/2521 useless extension candidates. Maximal degree in co-relation 11958. Up to 2266 conditions per place. [2024-06-21 19:14:27,558 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 14 changer transitions 0/146 dead transitions. [2024-06-21 19:14:27,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 146 transitions, 1706 flow [2024-06-21 19:14:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 19:14:27,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-06-21 19:14:27,559 INFO L175 Difference]: Start difference. First operand has 132 places, 133 transitions, 1378 flow. Second operand 6 states and 119 transitions. [2024-06-21 19:14:27,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 146 transitions, 1706 flow [2024-06-21 19:14:27,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 146 transitions, 1681 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:27,613 INFO L231 Difference]: Finished difference. Result has 135 places, 135 transitions, 1406 flow [2024-06-21 19:14:27,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1406, PETRI_PLACES=135, PETRI_TRANSITIONS=135} [2024-06-21 19:14:27,613 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-21 19:14:27,614 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 135 transitions, 1406 flow [2024-06-21 19:14:27,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:27,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:27,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:27,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:14:27,614 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)] === [2024-06-21 19:14:27,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1550877436, now seen corresponding path program 1 times [2024-06-21 19:14:27,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:27,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409037018] [2024-06-21 19:14:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:27,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:27,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:27,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409037018] [2024-06-21 19:14:27,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409037018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:27,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:27,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:27,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77075049] [2024-06-21 19:14:27,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:27,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:27,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:27,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:27,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:27,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:14:27,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 135 transitions, 1406 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:27,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:27,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:14:27,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:28,275 INFO L124 PetriNetUnfolderBase]: 1390/2408 cut-off events. [2024-06-21 19:14:28,275 INFO L125 PetriNetUnfolderBase]: For 36173/36219 co-relation queries the response was YES. [2024-06-21 19:14:28,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11449 conditions, 2408 events. 1390/2408 cut-off events. For 36173/36219 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14568 event pairs, 279 based on Foata normal form. 45/2441 useless extension candidates. Maximal degree in co-relation 11383. Up to 1816 conditions per place. [2024-06-21 19:14:28,295 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 92 selfloop transitions, 42 changer transitions 0/147 dead transitions. [2024-06-21 19:14:28,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 147 transitions, 1726 flow [2024-06-21 19:14:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 19:14:28,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 19:14:28,297 INFO L175 Difference]: Start difference. First operand has 135 places, 135 transitions, 1406 flow. Second operand 6 states and 108 transitions. [2024-06-21 19:14:28,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 147 transitions, 1726 flow [2024-06-21 19:14:28,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 147 transitions, 1697 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:28,380 INFO L231 Difference]: Finished difference. Result has 137 places, 135 transitions, 1488 flow [2024-06-21 19:14:28,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1488, PETRI_PLACES=137, PETRI_TRANSITIONS=135} [2024-06-21 19:14:28,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-21 19:14:28,381 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 135 transitions, 1488 flow [2024-06-21 19:14:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:28,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:28,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:28,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:14:28,381 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)] === [2024-06-21 19:14:28,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1925305004, now seen corresponding path program 1 times [2024-06-21 19:14:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:28,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954337634] [2024-06-21 19:14:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:28,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:28,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954337634] [2024-06-21 19:14:28,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954337634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:28,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:28,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:28,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195833608] [2024-06-21 19:14:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:28,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:28,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:28,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:28,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 135 transitions, 1488 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:28,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:28,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:28,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:29,147 INFO L124 PetriNetUnfolderBase]: 1481/2540 cut-off events. [2024-06-21 19:14:29,147 INFO L125 PetriNetUnfolderBase]: For 38249/38255 co-relation queries the response was YES. [2024-06-21 19:14:29,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12435 conditions, 2540 events. 1481/2540 cut-off events. For 38249/38255 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15353 event pairs, 587 based on Foata normal form. 7/2538 useless extension candidates. Maximal degree in co-relation 12368. Up to 2254 conditions per place. [2024-06-21 19:14:29,166 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 122 selfloop transitions, 31 changer transitions 0/160 dead transitions. [2024-06-21 19:14:29,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 160 transitions, 2023 flow [2024-06-21 19:14:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 19:14:29,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:14:29,167 INFO L175 Difference]: Start difference. First operand has 137 places, 135 transitions, 1488 flow. Second operand 6 states and 126 transitions. [2024-06-21 19:14:29,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 160 transitions, 2023 flow [2024-06-21 19:14:29,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 160 transitions, 1905 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 19:14:29,225 INFO L231 Difference]: Finished difference. Result has 137 places, 147 transitions, 1621 flow [2024-06-21 19:14:29,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1621, PETRI_PLACES=137, PETRI_TRANSITIONS=147} [2024-06-21 19:14:29,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-21 19:14:29,227 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 147 transitions, 1621 flow [2024-06-21 19:14:29,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:29,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:29,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:29,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:14:29,227 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)] === [2024-06-21 19:14:29,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1144238852, now seen corresponding path program 2 times [2024-06-21 19:14:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:29,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101722986] [2024-06-21 19:14:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:29,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101722986] [2024-06-21 19:14:29,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101722986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:29,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:29,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:29,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552849658] [2024-06-21 19:14:29,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:29,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:29,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:29,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:29,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:29,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:29,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 147 transitions, 1621 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:29,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:29,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:29,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:29,781 INFO L124 PetriNetUnfolderBase]: 1478/2537 cut-off events. [2024-06-21 19:14:29,781 INFO L125 PetriNetUnfolderBase]: For 33518/33524 co-relation queries the response was YES. [2024-06-21 19:14:29,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12285 conditions, 2537 events. 1478/2537 cut-off events. For 33518/33524 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15314 event pairs, 587 based on Foata normal form. 7/2534 useless extension candidates. Maximal degree in co-relation 12219. Up to 2275 conditions per place. [2024-06-21 19:14:29,798 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 129 selfloop transitions, 19 changer transitions 0/155 dead transitions. [2024-06-21 19:14:29,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 155 transitions, 1941 flow [2024-06-21 19:14:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-21 19:14:29,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-21 19:14:29,799 INFO L175 Difference]: Start difference. First operand has 137 places, 147 transitions, 1621 flow. Second operand 5 states and 104 transitions. [2024-06-21 19:14:29,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 155 transitions, 1941 flow [2024-06-21 19:14:29,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 155 transitions, 1882 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 19:14:29,860 INFO L231 Difference]: Finished difference. Result has 140 places, 147 transitions, 1610 flow [2024-06-21 19:14:29,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1610, PETRI_PLACES=140, PETRI_TRANSITIONS=147} [2024-06-21 19:14:29,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 19:14:29,861 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 147 transitions, 1610 flow [2024-06-21 19:14:29,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:29,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:29,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:29,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:14:29,862 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)] === [2024-06-21 19:14:29,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1272577290, now seen corresponding path program 3 times [2024-06-21 19:14:29,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:29,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370195893] [2024-06-21 19:14:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:29,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:30,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370195893] [2024-06-21 19:14:30,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370195893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:30,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:30,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:30,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568691874] [2024-06-21 19:14:30,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:30,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:30,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:30,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:30,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:30,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 147 transitions, 1610 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:30,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:30,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:30,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:30,483 INFO L124 PetriNetUnfolderBase]: 1483/2547 cut-off events. [2024-06-21 19:14:30,484 INFO L125 PetriNetUnfolderBase]: For 33651/33657 co-relation queries the response was YES. [2024-06-21 19:14:30,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12340 conditions, 2547 events. 1483/2547 cut-off events. For 33651/33657 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15490 event pairs, 587 based on Foata normal form. 7/2543 useless extension candidates. Maximal degree in co-relation 12273. Up to 2264 conditions per place. [2024-06-21 19:14:30,500 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 139 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-21 19:14:30,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 165 transitions, 2016 flow [2024-06-21 19:14:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 19:14:30,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-21 19:14:30,501 INFO L175 Difference]: Start difference. First operand has 140 places, 147 transitions, 1610 flow. Second operand 6 states and 125 transitions. [2024-06-21 19:14:30,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 165 transitions, 2016 flow [2024-06-21 19:14:30,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 165 transitions, 1980 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:30,558 INFO L231 Difference]: Finished difference. Result has 143 places, 150 transitions, 1664 flow [2024-06-21 19:14:30,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1664, PETRI_PLACES=143, PETRI_TRANSITIONS=150} [2024-06-21 19:14:30,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-21 19:14:30,559 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 150 transitions, 1664 flow [2024-06-21 19:14:30,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:30,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:30,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:30,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:14:30,559 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)] === [2024-06-21 19:14:30,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2055310608, now seen corresponding path program 4 times [2024-06-21 19:14:30,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:30,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444326719] [2024-06-21 19:14:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:30,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:30,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:30,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444326719] [2024-06-21 19:14:30,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444326719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:30,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:30,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:30,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671611315] [2024-06-21 19:14:30,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:30,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:30,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:30,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:30,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:30,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:30,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 150 transitions, 1664 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:30,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:30,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:30,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:31,152 INFO L124 PetriNetUnfolderBase]: 1488/2550 cut-off events. [2024-06-21 19:14:31,152 INFO L125 PetriNetUnfolderBase]: For 35834/35840 co-relation queries the response was YES. [2024-06-21 19:14:31,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12670 conditions, 2550 events. 1488/2550 cut-off events. For 35834/35840 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15435 event pairs, 584 based on Foata normal form. 7/2548 useless extension candidates. Maximal degree in co-relation 12602. Up to 2241 conditions per place. [2024-06-21 19:14:31,167 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 124 selfloop transitions, 41 changer transitions 0/172 dead transitions. [2024-06-21 19:14:31,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 172 transitions, 2202 flow [2024-06-21 19:14:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 19:14:31,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:14:31,169 INFO L175 Difference]: Start difference. First operand has 143 places, 150 transitions, 1664 flow. Second operand 6 states and 126 transitions. [2024-06-21 19:14:31,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 172 transitions, 2202 flow [2024-06-21 19:14:31,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 2096 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:31,227 INFO L231 Difference]: Finished difference. Result has 145 places, 159 transitions, 1783 flow [2024-06-21 19:14:31,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1783, PETRI_PLACES=145, PETRI_TRANSITIONS=159} [2024-06-21 19:14:31,228 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-21 19:14:31,228 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 159 transitions, 1783 flow [2024-06-21 19:14:31,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:31,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:31,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:31,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:14:31,228 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)] === [2024-06-21 19:14:31,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:31,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1628384790, now seen corresponding path program 5 times [2024-06-21 19:14:31,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:31,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34628558] [2024-06-21 19:14:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:31,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:31,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:31,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34628558] [2024-06-21 19:14:31,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34628558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:31,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:31,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:31,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993522017] [2024-06-21 19:14:31,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:31,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:31,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:31,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:31,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 159 transitions, 1783 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:31,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:31,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:31,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:31,791 INFO L124 PetriNetUnfolderBase]: 1493/2554 cut-off events. [2024-06-21 19:14:31,791 INFO L125 PetriNetUnfolderBase]: For 38205/38211 co-relation queries the response was YES. [2024-06-21 19:14:31,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12972 conditions, 2554 events. 1493/2554 cut-off events. For 38205/38211 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15408 event pairs, 585 based on Foata normal form. 7/2551 useless extension candidates. Maximal degree in co-relation 12903. Up to 2286 conditions per place. [2024-06-21 19:14:31,812 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 138 selfloop transitions, 27 changer transitions 0/172 dead transitions. [2024-06-21 19:14:31,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 172 transitions, 2249 flow [2024-06-21 19:14:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 19:14:31,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-21 19:14:31,813 INFO L175 Difference]: Start difference. First operand has 145 places, 159 transitions, 1783 flow. Second operand 6 states and 121 transitions. [2024-06-21 19:14:31,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 172 transitions, 2249 flow [2024-06-21 19:14:31,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 172 transitions, 2173 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 19:14:31,889 INFO L231 Difference]: Finished difference. Result has 149 places, 162 transitions, 1821 flow [2024-06-21 19:14:31,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=143, 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=6, PETRI_FLOW=1821, PETRI_PLACES=149, PETRI_TRANSITIONS=162} [2024-06-21 19:14:31,890 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-21 19:14:31,890 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 162 transitions, 1821 flow [2024-06-21 19:14:31,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:31,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:31,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:31,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:14:31,890 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)] === [2024-06-21 19:14:31,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1123546162, now seen corresponding path program 6 times [2024-06-21 19:14:31,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:31,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394660842] [2024-06-21 19:14:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:31,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:32,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:32,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394660842] [2024-06-21 19:14:32,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394660842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:32,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:32,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:32,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331614397] [2024-06-21 19:14:32,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:32,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:32,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:32,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:32,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:32,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:32,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 162 transitions, 1821 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:32,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:32,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:32,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:32,425 INFO L124 PetriNetUnfolderBase]: 1490/2554 cut-off events. [2024-06-21 19:14:32,426 INFO L125 PetriNetUnfolderBase]: For 37194/37200 co-relation queries the response was YES. [2024-06-21 19:14:32,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12750 conditions, 2554 events. 1490/2554 cut-off events. For 37194/37200 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15455 event pairs, 581 based on Foata normal form. 7/2551 useless extension candidates. Maximal degree in co-relation 12679. Up to 2292 conditions per place. [2024-06-21 19:14:32,443 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 145 selfloop transitions, 19 changer transitions 0/171 dead transitions. [2024-06-21 19:14:32,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 171 transitions, 2175 flow [2024-06-21 19:14:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 19:14:32,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-06-21 19:14:32,444 INFO L175 Difference]: Start difference. First operand has 149 places, 162 transitions, 1821 flow. Second operand 6 states and 119 transitions. [2024-06-21 19:14:32,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 171 transitions, 2175 flow [2024-06-21 19:14:32,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 171 transitions, 2048 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:32,519 INFO L231 Difference]: Finished difference. Result has 151 places, 162 transitions, 1738 flow [2024-06-21 19:14:32,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1738, PETRI_PLACES=151, PETRI_TRANSITIONS=162} [2024-06-21 19:14:32,520 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-21 19:14:32,520 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 162 transitions, 1738 flow [2024-06-21 19:14:32,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:32,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:32,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:32,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:14:32,521 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)] === [2024-06-21 19:14:32,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:32,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1280203786, now seen corresponding path program 1 times [2024-06-21 19:14:32,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:32,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202662946] [2024-06-21 19:14:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:32,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:33,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202662946] [2024-06-21 19:14:33,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202662946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:33,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:33,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:33,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389920429] [2024-06-21 19:14:33,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:33,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:33,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:33,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:33,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:33,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:33,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 162 transitions, 1738 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:33,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:33,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:33,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:33,586 INFO L124 PetriNetUnfolderBase]: 1556/2675 cut-off events. [2024-06-21 19:14:33,586 INFO L125 PetriNetUnfolderBase]: For 46599/46605 co-relation queries the response was YES. [2024-06-21 19:14:33,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13249 conditions, 2675 events. 1556/2675 cut-off events. For 46599/46605 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16356 event pairs, 559 based on Foata normal form. 24/2695 useless extension candidates. Maximal degree in co-relation 13178. Up to 2204 conditions per place. [2024-06-21 19:14:33,606 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 162 selfloop transitions, 24 changer transitions 0/193 dead transitions. [2024-06-21 19:14:33,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 193 transitions, 2262 flow [2024-06-21 19:14:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 19:14:33,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 19:14:33,607 INFO L175 Difference]: Start difference. First operand has 151 places, 162 transitions, 1738 flow. Second operand 7 states and 150 transitions. [2024-06-21 19:14:33,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 193 transitions, 2262 flow [2024-06-21 19:14:33,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 193 transitions, 2169 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:33,676 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 1760 flow [2024-06-21 19:14:33,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1760, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2024-06-21 19:14:33,677 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-21 19:14:33,677 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 1760 flow [2024-06-21 19:14:33,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:33,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:33,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:33,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:14:33,677 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)] === [2024-06-21 19:14:33,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:33,678 INFO L85 PathProgramCache]: Analyzing trace with hash -20078852, now seen corresponding path program 2 times [2024-06-21 19:14:33,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:33,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797615910] [2024-06-21 19:14:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:33,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:34,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:34,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797615910] [2024-06-21 19:14:34,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797615910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:34,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:34,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154665754] [2024-06-21 19:14:34,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:34,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:34,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:34,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:34,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 1760 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:34,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:34,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:34,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:34,796 INFO L124 PetriNetUnfolderBase]: 1622/2789 cut-off events. [2024-06-21 19:14:34,796 INFO L125 PetriNetUnfolderBase]: For 49996/49996 co-relation queries the response was YES. [2024-06-21 19:14:34,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14197 conditions, 2789 events. 1622/2789 cut-off events. For 49996/49996 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17278 event pairs, 812 based on Foata normal form. 9/2794 useless extension candidates. Maximal degree in co-relation 14125. Up to 2291 conditions per place. [2024-06-21 19:14:34,826 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 168 selfloop transitions, 26 changer transitions 0/201 dead transitions. [2024-06-21 19:14:34,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 201 transitions, 2383 flow [2024-06-21 19:14:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 19:14:34,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528125 [2024-06-21 19:14:34,829 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 1760 flow. Second operand 8 states and 169 transitions. [2024-06-21 19:14:34,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 201 transitions, 2383 flow [2024-06-21 19:14:34,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 201 transitions, 2321 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:34,945 INFO L231 Difference]: Finished difference. Result has 158 places, 170 transitions, 1802 flow [2024-06-21 19:14:34,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1802, PETRI_PLACES=158, PETRI_TRANSITIONS=170} [2024-06-21 19:14:34,946 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-21 19:14:34,946 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 170 transitions, 1802 flow [2024-06-21 19:14:34,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:34,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:34,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:34,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:14:34,947 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)] === [2024-06-21 19:14:34,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:34,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1628139518, now seen corresponding path program 1 times [2024-06-21 19:14:34,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:34,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517712133] [2024-06-21 19:14:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:34,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:35,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:35,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517712133] [2024-06-21 19:14:35,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517712133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:35,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:35,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:35,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369014906] [2024-06-21 19:14:35,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:35,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:35,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:35,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:35,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:14:35,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 170 transitions, 1802 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-21 19:14:35,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:35,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:14:35,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:36,152 INFO L124 PetriNetUnfolderBase]: 1617/2779 cut-off events. [2024-06-21 19:14:36,152 INFO L125 PetriNetUnfolderBase]: For 47735/47735 co-relation queries the response was YES. [2024-06-21 19:14:36,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14185 conditions, 2779 events. 1617/2779 cut-off events. For 47735/47735 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17235 event pairs, 804 based on Foata normal form. 2/2777 useless extension candidates. Maximal degree in co-relation 14110. Up to 2469 conditions per place. [2024-06-21 19:14:36,176 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 159 selfloop transitions, 20 changer transitions 0/185 dead transitions. [2024-06-21 19:14:36,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 185 transitions, 2224 flow [2024-06-21 19:14:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 19:14:36,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-21 19:14:36,177 INFO L175 Difference]: Start difference. First operand has 158 places, 170 transitions, 1802 flow. Second operand 7 states and 127 transitions. [2024-06-21 19:14:36,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 185 transitions, 2224 flow [2024-06-21 19:14:36,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 185 transitions, 2195 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:36,274 INFO L231 Difference]: Finished difference. Result has 162 places, 172 transitions, 1847 flow [2024-06-21 19:14:36,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1847, PETRI_PLACES=162, PETRI_TRANSITIONS=172} [2024-06-21 19:14:36,275 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-21 19:14:36,275 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 172 transitions, 1847 flow [2024-06-21 19:14:36,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-21 19:14:36,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:36,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:36,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:14:36,275 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)] === [2024-06-21 19:14:36,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash -599106022, now seen corresponding path program 3 times [2024-06-21 19:14:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:36,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930969831] [2024-06-21 19:14:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:36,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:36,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:36,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930969831] [2024-06-21 19:14:36,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930969831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:36,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:36,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:36,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118421068] [2024-06-21 19:14:36,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:36,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:36,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:36,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:36,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:36,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:36,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 172 transitions, 1847 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:36,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:36,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:36,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:37,273 INFO L124 PetriNetUnfolderBase]: 1596/2745 cut-off events. [2024-06-21 19:14:37,274 INFO L125 PetriNetUnfolderBase]: For 48680/48680 co-relation queries the response was YES. [2024-06-21 19:14:37,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13909 conditions, 2745 events. 1596/2745 cut-off events. For 48680/48680 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16955 event pairs, 807 based on Foata normal form. 9/2750 useless extension candidates. Maximal degree in co-relation 13832. Up to 2422 conditions per place. [2024-06-21 19:14:37,295 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 167 selfloop transitions, 15 changer transitions 0/189 dead transitions. [2024-06-21 19:14:37,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 189 transitions, 2288 flow [2024-06-21 19:14:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 19:14:37,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-21 19:14:37,298 INFO L175 Difference]: Start difference. First operand has 162 places, 172 transitions, 1847 flow. Second operand 7 states and 137 transitions. [2024-06-21 19:14:37,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 189 transitions, 2288 flow [2024-06-21 19:14:37,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 189 transitions, 2246 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:37,389 INFO L231 Difference]: Finished difference. Result has 164 places, 173 transitions, 1854 flow [2024-06-21 19:14:37,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1854, PETRI_PLACES=164, PETRI_TRANSITIONS=173} [2024-06-21 19:14:37,390 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-21 19:14:37,390 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 173 transitions, 1854 flow [2024-06-21 19:14:37,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:37,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:37,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:37,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:14:37,390 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)] === [2024-06-21 19:14:37,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2030827130, now seen corresponding path program 1 times [2024-06-21 19:14:37,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:37,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872266108] [2024-06-21 19:14:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:37,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:37,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:37,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872266108] [2024-06-21 19:14:37,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872266108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:37,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:37,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:37,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745692226] [2024-06-21 19:14:37,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:37,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:37,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:37,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:37,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:14:37,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 173 transitions, 1854 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:37,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:37,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:14:37,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:38,296 INFO L124 PetriNetUnfolderBase]: 1629/2789 cut-off events. [2024-06-21 19:14:38,296 INFO L125 PetriNetUnfolderBase]: For 47808/47814 co-relation queries the response was YES. [2024-06-21 19:14:38,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14401 conditions, 2789 events. 1629/2789 cut-off events. For 47808/47814 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17124 event pairs, 353 based on Foata normal form. 7/2786 useless extension candidates. Maximal degree in co-relation 14323. Up to 2145 conditions per place. [2024-06-21 19:14:38,317 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 142 selfloop transitions, 61 changer transitions 0/209 dead transitions. [2024-06-21 19:14:38,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 209 transitions, 2557 flow [2024-06-21 19:14:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 19:14:38,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 19:14:38,318 INFO L175 Difference]: Start difference. First operand has 164 places, 173 transitions, 1854 flow. Second operand 10 states and 175 transitions. [2024-06-21 19:14:38,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 209 transitions, 2557 flow [2024-06-21 19:14:38,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 209 transitions, 2525 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:38,438 INFO L231 Difference]: Finished difference. Result has 171 places, 183 transitions, 2122 flow [2024-06-21 19:14:38,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2122, PETRI_PLACES=171, PETRI_TRANSITIONS=183} [2024-06-21 19:14:38,438 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-21 19:14:38,438 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 183 transitions, 2122 flow [2024-06-21 19:14:38,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:38,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:38,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:38,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:14:38,439 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)] === [2024-06-21 19:14:38,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash -282553684, now seen corresponding path program 2 times [2024-06-21 19:14:38,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:38,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262726051] [2024-06-21 19:14:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:38,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:38,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:38,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262726051] [2024-06-21 19:14:38,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262726051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:38,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:38,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:38,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19849032] [2024-06-21 19:14:38,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:38,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:38,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:38,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:38,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:38,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 183 transitions, 2122 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:38,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:38,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:38,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:39,121 INFO L124 PetriNetUnfolderBase]: 1634/2804 cut-off events. [2024-06-21 19:14:39,122 INFO L125 PetriNetUnfolderBase]: For 53338/53344 co-relation queries the response was YES. [2024-06-21 19:14:39,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15377 conditions, 2804 events. 1634/2804 cut-off events. For 53338/53344 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17219 event pairs, 359 based on Foata normal form. 7/2801 useless extension candidates. Maximal degree in co-relation 15296. Up to 2151 conditions per place. [2024-06-21 19:14:39,142 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 140 selfloop transitions, 63 changer transitions 0/210 dead transitions. [2024-06-21 19:14:39,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 210 transitions, 2743 flow [2024-06-21 19:14:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 19:14:39,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-21 19:14:39,143 INFO L175 Difference]: Start difference. First operand has 171 places, 183 transitions, 2122 flow. Second operand 8 states and 165 transitions. [2024-06-21 19:14:39,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 210 transitions, 2743 flow [2024-06-21 19:14:39,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 210 transitions, 2608 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:39,239 INFO L231 Difference]: Finished difference. Result has 174 places, 186 transitions, 2174 flow [2024-06-21 19:14:39,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2174, PETRI_PLACES=174, PETRI_TRANSITIONS=186} [2024-06-21 19:14:39,240 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-21 19:14:39,240 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 186 transitions, 2174 flow [2024-06-21 19:14:39,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:39,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:39,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:39,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:14:39,240 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)] === [2024-06-21 19:14:39,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash 610692716, now seen corresponding path program 3 times [2024-06-21 19:14:39,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:39,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297362476] [2024-06-21 19:14:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:39,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:39,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:39,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297362476] [2024-06-21 19:14:39,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297362476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:39,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:39,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:39,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061422952] [2024-06-21 19:14:39,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:39,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:39,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:39,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:39,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:39,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:39,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 186 transitions, 2174 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:39,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:39,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:39,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:39,869 INFO L124 PetriNetUnfolderBase]: 1639/2818 cut-off events. [2024-06-21 19:14:39,869 INFO L125 PetriNetUnfolderBase]: For 55978/55984 co-relation queries the response was YES. [2024-06-21 19:14:39,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15665 conditions, 2818 events. 1639/2818 cut-off events. For 55978/55984 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17348 event pairs, 372 based on Foata normal form. 7/2816 useless extension candidates. Maximal degree in co-relation 15583. Up to 2197 conditions per place. [2024-06-21 19:14:39,892 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 151 selfloop transitions, 53 changer transitions 0/211 dead transitions. [2024-06-21 19:14:39,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 211 transitions, 2727 flow [2024-06-21 19:14:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 19:14:39,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-21 19:14:39,895 INFO L175 Difference]: Start difference. First operand has 174 places, 186 transitions, 2174 flow. Second operand 8 states and 159 transitions. [2024-06-21 19:14:39,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 211 transitions, 2727 flow [2024-06-21 19:14:39,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 211 transitions, 2594 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:40,001 INFO L231 Difference]: Finished difference. Result has 177 places, 191 transitions, 2220 flow [2024-06-21 19:14:40,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2220, PETRI_PLACES=177, PETRI_TRANSITIONS=191} [2024-06-21 19:14:40,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-21 19:14:40,001 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 191 transitions, 2220 flow [2024-06-21 19:14:40,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:40,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:40,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:40,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:14:40,002 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)] === [2024-06-21 19:14:40,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:40,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1318647162, now seen corresponding path program 4 times [2024-06-21 19:14:40,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:40,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676803826] [2024-06-21 19:14:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:40,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:40,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676803826] [2024-06-21 19:14:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676803826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:40,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:40,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:40,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613992089] [2024-06-21 19:14:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:40,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:40,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:40,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 191 transitions, 2220 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:40,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:40,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:40,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:40,690 INFO L124 PetriNetUnfolderBase]: 1735/2958 cut-off events. [2024-06-21 19:14:40,690 INFO L125 PetriNetUnfolderBase]: For 66590/66590 co-relation queries the response was YES. [2024-06-21 19:14:40,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17146 conditions, 2958 events. 1735/2958 cut-off events. For 66590/66590 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18183 event pairs, 319 based on Foata normal form. 1/2954 useless extension candidates. Maximal degree in co-relation 17063. Up to 1999 conditions per place. [2024-06-21 19:14:40,716 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 89 changer transitions 0/228 dead transitions. [2024-06-21 19:14:40,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 228 transitions, 3111 flow [2024-06-21 19:14:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 19:14:40,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-21 19:14:40,717 INFO L175 Difference]: Start difference. First operand has 177 places, 191 transitions, 2220 flow. Second operand 7 states and 152 transitions. [2024-06-21 19:14:40,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 228 transitions, 3111 flow [2024-06-21 19:14:40,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 228 transitions, 3002 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:40,850 INFO L231 Difference]: Finished difference. Result has 182 places, 206 transitions, 2626 flow [2024-06-21 19:14:40,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2626, PETRI_PLACES=182, PETRI_TRANSITIONS=206} [2024-06-21 19:14:40,851 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-21 19:14:40,851 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 206 transitions, 2626 flow [2024-06-21 19:14:40,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:40,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:40,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:40,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:14:40,852 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)] === [2024-06-21 19:14:40,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:40,852 INFO L85 PathProgramCache]: Analyzing trace with hash -445235952, now seen corresponding path program 1 times [2024-06-21 19:14:40,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:40,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236993035] [2024-06-21 19:14:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:40,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:41,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:41,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236993035] [2024-06-21 19:14:41,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236993035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:41,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:41,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:41,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834720148] [2024-06-21 19:14:41,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:41,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:41,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:41,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:41,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:41,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 206 transitions, 2626 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:41,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:41,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:41,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:41,959 INFO L124 PetriNetUnfolderBase]: 1801/3055 cut-off events. [2024-06-21 19:14:41,960 INFO L125 PetriNetUnfolderBase]: For 81060/81066 co-relation queries the response was YES. [2024-06-21 19:14:41,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18780 conditions, 3055 events. 1801/3055 cut-off events. For 81060/81066 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18942 event pairs, 634 based on Foata normal form. 11/3064 useless extension candidates. Maximal degree in co-relation 18694. Up to 2626 conditions per place. [2024-06-21 19:14:41,986 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 184 selfloop transitions, 46 changer transitions 0/237 dead transitions. [2024-06-21 19:14:41,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 237 transitions, 3389 flow [2024-06-21 19:14:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 19:14:41,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:14:41,987 INFO L175 Difference]: Start difference. First operand has 182 places, 206 transitions, 2626 flow. Second operand 8 states and 168 transitions. [2024-06-21 19:14:41,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 237 transitions, 3389 flow [2024-06-21 19:14:42,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 237 transitions, 3268 flow, removed 49 selfloop flow, removed 1 redundant places. [2024-06-21 19:14:42,149 INFO L231 Difference]: Finished difference. Result has 190 places, 213 transitions, 2727 flow [2024-06-21 19:14:42,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2727, PETRI_PLACES=190, PETRI_TRANSITIONS=213} [2024-06-21 19:14:42,149 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-21 19:14:42,149 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 213 transitions, 2727 flow [2024-06-21 19:14:42,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:42,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:42,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:42,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:14:42,150 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)] === [2024-06-21 19:14:42,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:42,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1318318872, now seen corresponding path program 5 times [2024-06-21 19:14:42,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:42,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234107706] [2024-06-21 19:14:42,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:42,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:42,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:42,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234107706] [2024-06-21 19:14:42,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234107706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:42,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:42,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:42,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214944923] [2024-06-21 19:14:42,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:42,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:42,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:42,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:42,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:42,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:42,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 213 transitions, 2727 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:42,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:42,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:42,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:42,911 INFO L124 PetriNetUnfolderBase]: 1819/3084 cut-off events. [2024-06-21 19:14:42,912 INFO L125 PetriNetUnfolderBase]: For 78482/78482 co-relation queries the response was YES. [2024-06-21 19:14:42,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18978 conditions, 3084 events. 1819/3084 cut-off events. For 78482/78482 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19020 event pairs, 328 based on Foata normal form. 1/3080 useless extension candidates. Maximal degree in co-relation 18889. Up to 2113 conditions per place. [2024-06-21 19:14:42,937 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 131 selfloop transitions, 99 changer transitions 0/237 dead transitions. [2024-06-21 19:14:42,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 237 transitions, 3478 flow [2024-06-21 19:14:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 19:14:42,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 19:14:42,939 INFO L175 Difference]: Start difference. First operand has 190 places, 213 transitions, 2727 flow. Second operand 7 states and 150 transitions. [2024-06-21 19:14:42,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 237 transitions, 3478 flow [2024-06-21 19:14:43,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 237 transitions, 3408 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:43,108 INFO L231 Difference]: Finished difference. Result has 192 places, 218 transitions, 2950 flow [2024-06-21 19:14:43,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2950, PETRI_PLACES=192, PETRI_TRANSITIONS=218} [2024-06-21 19:14:43,109 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-21 19:14:43,109 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 218 transitions, 2950 flow [2024-06-21 19:14:43,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:43,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:43,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:43,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:14:43,109 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)] === [2024-06-21 19:14:43,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:43,110 INFO L85 PathProgramCache]: Analyzing trace with hash 602515938, now seen corresponding path program 2 times [2024-06-21 19:14:43,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:43,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401252125] [2024-06-21 19:14:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:43,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:43,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:43,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401252125] [2024-06-21 19:14:43,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401252125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:43,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:43,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:43,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430582886] [2024-06-21 19:14:43,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:43,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:43,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:43,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 218 transitions, 2950 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:43,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:43,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:43,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:44,020 INFO L124 PetriNetUnfolderBase]: 1806/3055 cut-off events. [2024-06-21 19:14:44,021 INFO L125 PetriNetUnfolderBase]: For 80444/80450 co-relation queries the response was YES. [2024-06-21 19:14:44,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19001 conditions, 3055 events. 1806/3055 cut-off events. For 80444/80450 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 18942 event pairs, 644 based on Foata normal form. 11/3064 useless extension candidates. Maximal degree in co-relation 18911. Up to 2728 conditions per place. [2024-06-21 19:14:44,044 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 199 selfloop transitions, 24 changer transitions 0/230 dead transitions. [2024-06-21 19:14:44,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 230 transitions, 3462 flow [2024-06-21 19:14:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 19:14:44,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-21 19:14:44,046 INFO L175 Difference]: Start difference. First operand has 192 places, 218 transitions, 2950 flow. Second operand 6 states and 123 transitions. [2024-06-21 19:14:44,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 230 transitions, 3462 flow [2024-06-21 19:14:44,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 230 transitions, 3319 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:44,244 INFO L231 Difference]: Finished difference. Result has 195 places, 218 transitions, 2866 flow [2024-06-21 19:14:44,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2866, PETRI_PLACES=195, PETRI_TRANSITIONS=218} [2024-06-21 19:14:44,245 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-21 19:14:44,245 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 218 transitions, 2866 flow [2024-06-21 19:14:44,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:44,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:44,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:44,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:14:44,245 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)] === [2024-06-21 19:14:44,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1111665432, now seen corresponding path program 6 times [2024-06-21 19:14:44,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:44,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961072396] [2024-06-21 19:14:44,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:44,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:44,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:44,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961072396] [2024-06-21 19:14:44,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961072396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:44,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:44,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:44,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257181782] [2024-06-21 19:14:44,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:44,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:44,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:44,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:44,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:44,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:44,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 218 transitions, 2866 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:44,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:44,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:44,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:44,942 INFO L124 PetriNetUnfolderBase]: 1801/3046 cut-off events. [2024-06-21 19:14:44,942 INFO L125 PetriNetUnfolderBase]: For 77121/77121 co-relation queries the response was YES. [2024-06-21 19:14:44,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18695 conditions, 3046 events. 1801/3046 cut-off events. For 77121/77121 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18734 event pairs, 308 based on Foata normal form. 3/3044 useless extension candidates. Maximal degree in co-relation 18604. Up to 2273 conditions per place. [2024-06-21 19:14:44,970 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 166 selfloop transitions, 59 changer transitions 0/232 dead transitions. [2024-06-21 19:14:44,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 232 transitions, 3430 flow [2024-06-21 19:14:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 19:14:44,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-21 19:14:44,972 INFO L175 Difference]: Start difference. First operand has 195 places, 218 transitions, 2866 flow. Second operand 6 states and 127 transitions. [2024-06-21 19:14:44,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 232 transitions, 3430 flow [2024-06-21 19:14:45,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 232 transitions, 3365 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:45,197 INFO L231 Difference]: Finished difference. Result has 197 places, 218 transitions, 2926 flow [2024-06-21 19:14:45,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2926, PETRI_PLACES=197, PETRI_TRANSITIONS=218} [2024-06-21 19:14:45,198 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-21 19:14:45,198 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 218 transitions, 2926 flow [2024-06-21 19:14:45,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:45,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:45,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:45,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:14:45,198 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)] === [2024-06-21 19:14:45,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:45,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1111785402, now seen corresponding path program 7 times [2024-06-21 19:14:45,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:45,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800985932] [2024-06-21 19:14:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:45,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:45,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:45,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800985932] [2024-06-21 19:14:45,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800985932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:45,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:45,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:45,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496862989] [2024-06-21 19:14:45,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:45,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:45,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:45,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:45,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 218 transitions, 2926 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:45,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:45,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:45,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:46,052 INFO L124 PetriNetUnfolderBase]: 1793/3035 cut-off events. [2024-06-21 19:14:46,052 INFO L125 PetriNetUnfolderBase]: For 79134/79134 co-relation queries the response was YES. [2024-06-21 19:14:46,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18746 conditions, 3035 events. 1793/3035 cut-off events. For 79134/79134 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18644 event pairs, 308 based on Foata normal form. 3/3033 useless extension candidates. Maximal degree in co-relation 18654. Up to 2422 conditions per place. [2024-06-21 19:14:46,094 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 178 selfloop transitions, 45 changer transitions 0/230 dead transitions. [2024-06-21 19:14:46,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 230 transitions, 3404 flow [2024-06-21 19:14:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 19:14:46,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-21 19:14:46,095 INFO L175 Difference]: Start difference. First operand has 197 places, 218 transitions, 2926 flow. Second operand 6 states and 123 transitions. [2024-06-21 19:14:46,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 230 transitions, 3404 flow [2024-06-21 19:14:46,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 230 transitions, 3262 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:46,302 INFO L231 Difference]: Finished difference. Result has 199 places, 218 transitions, 2880 flow [2024-06-21 19:14:46,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2880, PETRI_PLACES=199, PETRI_TRANSITIONS=218} [2024-06-21 19:14:46,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-21 19:14:46,303 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 218 transitions, 2880 flow [2024-06-21 19:14:46,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:46,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:46,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:46,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:14:46,303 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)] === [2024-06-21 19:14:46,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash 602783065, now seen corresponding path program 1 times [2024-06-21 19:14:46,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:46,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700652258] [2024-06-21 19:14:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:46,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:46,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:46,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700652258] [2024-06-21 19:14:46,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700652258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:46,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:46,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:46,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533761219] [2024-06-21 19:14:46,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:46,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:46,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:46,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:14:46,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 218 transitions, 2880 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:46,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:46,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:14:46,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:47,197 INFO L124 PetriNetUnfolderBase]: 1785/3028 cut-off events. [2024-06-21 19:14:47,198 INFO L125 PetriNetUnfolderBase]: For 81041/81047 co-relation queries the response was YES. [2024-06-21 19:14:47,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18481 conditions, 3028 events. 1785/3028 cut-off events. For 81041/81047 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18806 event pairs, 603 based on Foata normal form. 8/3034 useless extension candidates. Maximal degree in co-relation 18388. Up to 2709 conditions per place. [2024-06-21 19:14:47,225 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 28 changer transitions 0/229 dead transitions. [2024-06-21 19:14:47,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 229 transitions, 3379 flow [2024-06-21 19:14:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 19:14:47,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-21 19:14:47,226 INFO L175 Difference]: Start difference. First operand has 199 places, 218 transitions, 2880 flow. Second operand 6 states and 109 transitions. [2024-06-21 19:14:47,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 229 transitions, 3379 flow [2024-06-21 19:14:47,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 229 transitions, 3266 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:47,428 INFO L231 Difference]: Finished difference. Result has 200 places, 219 transitions, 2864 flow [2024-06-21 19:14:47,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2864, PETRI_PLACES=200, PETRI_TRANSITIONS=219} [2024-06-21 19:14:47,429 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-21 19:14:47,429 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 219 transitions, 2864 flow [2024-06-21 19:14:47,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:47,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:47,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:47,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:14:47,430 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)] === [2024-06-21 19:14:47,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:47,430 INFO L85 PathProgramCache]: Analyzing trace with hash 795041394, now seen corresponding path program 3 times [2024-06-21 19:14:47,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:47,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088915993] [2024-06-21 19:14:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:47,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:47,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088915993] [2024-06-21 19:14:47,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088915993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:47,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171785124] [2024-06-21 19:14:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:47,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:47,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:47,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 219 transitions, 2864 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:47,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:47,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:47,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:48,410 INFO L124 PetriNetUnfolderBase]: 1817/3079 cut-off events. [2024-06-21 19:14:48,410 INFO L125 PetriNetUnfolderBase]: For 86688/86694 co-relation queries the response was YES. [2024-06-21 19:14:48,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18735 conditions, 3079 events. 1817/3079 cut-off events. For 86688/86694 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19115 event pairs, 645 based on Foata normal form. 11/3088 useless extension candidates. Maximal degree in co-relation 18641. Up to 2736 conditions per place. [2024-06-21 19:14:48,437 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 216 selfloop transitions, 24 changer transitions 0/247 dead transitions. [2024-06-21 19:14:48,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 247 transitions, 3519 flow [2024-06-21 19:14:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 19:14:48,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-21 19:14:48,438 INFO L175 Difference]: Start difference. First operand has 200 places, 219 transitions, 2864 flow. Second operand 8 states and 162 transitions. [2024-06-21 19:14:48,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 247 transitions, 3519 flow [2024-06-21 19:14:48,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 247 transitions, 3445 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:48,673 INFO L231 Difference]: Finished difference. Result has 204 places, 224 transitions, 2922 flow [2024-06-21 19:14:48,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2922, PETRI_PLACES=204, PETRI_TRANSITIONS=224} [2024-06-21 19:14:48,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-21 19:14:48,673 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 224 transitions, 2922 flow [2024-06-21 19:14:48,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:48,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:48,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:48,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:14:48,674 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)] === [2024-06-21 19:14:48,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:48,674 INFO L85 PathProgramCache]: Analyzing trace with hash -862912536, now seen corresponding path program 8 times [2024-06-21 19:14:48,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:48,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867958569] [2024-06-21 19:14:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:48,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:48,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:48,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867958569] [2024-06-21 19:14:48,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867958569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:48,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:48,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:48,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30129417] [2024-06-21 19:14:48,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:48,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:48,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:48,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:48,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:48,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:48,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 224 transitions, 2922 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:48,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:48,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:48,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:49,467 INFO L124 PetriNetUnfolderBase]: 1830/3092 cut-off events. [2024-06-21 19:14:49,467 INFO L125 PetriNetUnfolderBase]: For 83389/83389 co-relation queries the response was YES. [2024-06-21 19:14:49,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19063 conditions, 3092 events. 1830/3092 cut-off events. For 83389/83389 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18956 event pairs, 352 based on Foata normal form. 1/3088 useless extension candidates. Maximal degree in co-relation 18969. Up to 2532 conditions per place. [2024-06-21 19:14:49,495 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 185 selfloop transitions, 60 changer transitions 0/252 dead transitions. [2024-06-21 19:14:49,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 252 transitions, 3672 flow [2024-06-21 19:14:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 19:14:49,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-21 19:14:49,496 INFO L175 Difference]: Start difference. First operand has 204 places, 224 transitions, 2922 flow. Second operand 9 states and 178 transitions. [2024-06-21 19:14:49,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 252 transitions, 3672 flow [2024-06-21 19:14:49,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 252 transitions, 3603 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:49,711 INFO L231 Difference]: Finished difference. Result has 208 places, 230 transitions, 3085 flow [2024-06-21 19:14:49,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3085, PETRI_PLACES=208, PETRI_TRANSITIONS=230} [2024-06-21 19:14:49,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-21 19:14:49,711 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 230 transitions, 3085 flow [2024-06-21 19:14:49,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:49,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:49,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:49,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:14:49,712 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)] === [2024-06-21 19:14:49,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:49,712 INFO L85 PathProgramCache]: Analyzing trace with hash 126795286, now seen corresponding path program 4 times [2024-06-21 19:14:49,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:49,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552367962] [2024-06-21 19:14:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:49,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:50,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:50,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552367962] [2024-06-21 19:14:50,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552367962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:50,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:50,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:50,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486453642] [2024-06-21 19:14:50,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:50,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:50,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:50,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:50,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:50,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 230 transitions, 3085 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:50,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:50,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:50,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:50,999 INFO L124 PetriNetUnfolderBase]: 1904/3238 cut-off events. [2024-06-21 19:14:50,999 INFO L125 PetriNetUnfolderBase]: For 93179/93185 co-relation queries the response was YES. [2024-06-21 19:14:51,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20027 conditions, 3238 events. 1904/3238 cut-off events. For 93179/93185 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20261 event pairs, 626 based on Foata normal form. 9/3245 useless extension candidates. Maximal degree in co-relation 19932. Up to 2691 conditions per place. [2024-06-21 19:14:51,034 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 224 selfloop transitions, 36 changer transitions 0/267 dead transitions. [2024-06-21 19:14:51,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 267 transitions, 3823 flow [2024-06-21 19:14:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-21 19:14:51,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 19:14:51,035 INFO L175 Difference]: Start difference. First operand has 208 places, 230 transitions, 3085 flow. Second operand 8 states and 172 transitions. [2024-06-21 19:14:51,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 267 transitions, 3823 flow [2024-06-21 19:14:51,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 267 transitions, 3643 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:51,322 INFO L231 Difference]: Finished difference. Result has 211 places, 235 transitions, 3059 flow [2024-06-21 19:14:51,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3059, PETRI_PLACES=211, PETRI_TRANSITIONS=235} [2024-06-21 19:14:51,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-21 19:14:51,323 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 235 transitions, 3059 flow [2024-06-21 19:14:51,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:51,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:51,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:51,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:14:51,323 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)] === [2024-06-21 19:14:51,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:51,323 INFO L85 PathProgramCache]: Analyzing trace with hash -622452480, now seen corresponding path program 5 times [2024-06-21 19:14:51,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:51,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498751586] [2024-06-21 19:14:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:51,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:51,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498751586] [2024-06-21 19:14:51,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498751586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:51,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:51,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:51,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618837799] [2024-06-21 19:14:51,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:51,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:51,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:51,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:51,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 235 transitions, 3059 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:51,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:51,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:51,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:52,535 INFO L124 PetriNetUnfolderBase]: 1951/3300 cut-off events. [2024-06-21 19:14:52,535 INFO L125 PetriNetUnfolderBase]: For 104071/104077 co-relation queries the response was YES. [2024-06-21 19:14:52,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20963 conditions, 3300 events. 1951/3300 cut-off events. For 104071/104077 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20690 event pairs, 661 based on Foata normal form. 11/3309 useless extension candidates. Maximal degree in co-relation 20867. Up to 2718 conditions per place. [2024-06-21 19:14:52,565 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 190 selfloop transitions, 70 changer transitions 0/267 dead transitions. [2024-06-21 19:14:52,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 267 transitions, 3937 flow [2024-06-21 19:14:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 19:14:52,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-21 19:14:52,567 INFO L175 Difference]: Start difference. First operand has 211 places, 235 transitions, 3059 flow. Second operand 9 states and 186 transitions. [2024-06-21 19:14:52,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 267 transitions, 3937 flow [2024-06-21 19:14:52,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 267 transitions, 3846 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:52,780 INFO L231 Difference]: Finished difference. Result has 216 places, 239 transitions, 3201 flow [2024-06-21 19:14:52,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=207, 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=9, PETRI_FLOW=3201, PETRI_PLACES=216, PETRI_TRANSITIONS=239} [2024-06-21 19:14:52,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 19:14:52,781 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 239 transitions, 3201 flow [2024-06-21 19:14:52,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:52,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:52,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:52,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:14:52,781 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)] === [2024-06-21 19:14:52,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:52,782 INFO L85 PathProgramCache]: Analyzing trace with hash -862584246, now seen corresponding path program 9 times [2024-06-21 19:14:52,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:52,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631816425] [2024-06-21 19:14:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:52,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:52,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:52,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631816425] [2024-06-21 19:14:52,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631816425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:52,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:52,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232720836] [2024-06-21 19:14:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:52,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:52,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:52,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:52,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:53,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:53,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 239 transitions, 3201 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:53,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:53,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:53,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:53,577 INFO L124 PetriNetUnfolderBase]: 1948/3301 cut-off events. [2024-06-21 19:14:53,577 INFO L125 PetriNetUnfolderBase]: For 97149/97149 co-relation queries the response was YES. [2024-06-21 19:14:53,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20883 conditions, 3301 events. 1948/3301 cut-off events. For 97149/97149 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20566 event pairs, 367 based on Foata normal form. 1/3297 useless extension candidates. Maximal degree in co-relation 20786. Up to 2711 conditions per place. [2024-06-21 19:14:53,610 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 59 changer transitions 0/255 dead transitions. [2024-06-21 19:14:53,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 255 transitions, 3753 flow [2024-06-21 19:14:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 19:14:53,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-21 19:14:53,611 INFO L175 Difference]: Start difference. First operand has 216 places, 239 transitions, 3201 flow. Second operand 7 states and 144 transitions. [2024-06-21 19:14:53,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 255 transitions, 3753 flow [2024-06-21 19:14:53,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 255 transitions, 3640 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:53,870 INFO L231 Difference]: Finished difference. Result has 219 places, 239 transitions, 3212 flow [2024-06-21 19:14:53,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3088, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3212, PETRI_PLACES=219, PETRI_TRANSITIONS=239} [2024-06-21 19:14:53,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-21 19:14:53,871 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 239 transitions, 3212 flow [2024-06-21 19:14:53,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:53,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:53,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:53,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:14:53,871 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)] === [2024-06-21 19:14:53,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:53,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1178975898, now seen corresponding path program 10 times [2024-06-21 19:14:53,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:53,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250331171] [2024-06-21 19:14:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:53,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:54,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:54,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250331171] [2024-06-21 19:14:54,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250331171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:54,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:54,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:54,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111787486] [2024-06-21 19:14:54,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:54,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:54,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:54,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:54,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 239 transitions, 3212 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:54,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:54,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:54,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:54,615 INFO L124 PetriNetUnfolderBase]: 1999/3364 cut-off events. [2024-06-21 19:14:54,615 INFO L125 PetriNetUnfolderBase]: For 108144/108144 co-relation queries the response was YES. [2024-06-21 19:14:54,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21701 conditions, 3364 events. 1999/3364 cut-off events. For 108144/108144 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20924 event pairs, 413 based on Foata normal form. 1/3360 useless extension candidates. Maximal degree in co-relation 21602. Up to 2229 conditions per place. [2024-06-21 19:14:54,650 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 147 selfloop transitions, 112 changer transitions 0/266 dead transitions. [2024-06-21 19:14:54,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 266 transitions, 4132 flow [2024-06-21 19:14:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 19:14:54,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:14:54,651 INFO L175 Difference]: Start difference. First operand has 219 places, 239 transitions, 3212 flow. Second operand 7 states and 147 transitions. [2024-06-21 19:14:54,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 266 transitions, 4132 flow [2024-06-21 19:14:54,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 266 transitions, 4014 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:54,981 INFO L231 Difference]: Finished difference. Result has 221 places, 245 transitions, 3524 flow [2024-06-21 19:14:54,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3524, PETRI_PLACES=221, PETRI_TRANSITIONS=245} [2024-06-21 19:14:54,982 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-21 19:14:54,982 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 245 transitions, 3524 flow [2024-06-21 19:14:54,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:54,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:54,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:54,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:14:54,983 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)] === [2024-06-21 19:14:54,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash -12757771, now seen corresponding path program 2 times [2024-06-21 19:14:54,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:54,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122509757] [2024-06-21 19:14:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:54,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:55,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:55,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122509757] [2024-06-21 19:14:55,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122509757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:55,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:55,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:55,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528960551] [2024-06-21 19:14:55,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:55,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:55,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:55,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:55,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:55,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:55,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 245 transitions, 3524 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:55,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:55,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:55,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:55,910 INFO L124 PetriNetUnfolderBase]: 2007/3379 cut-off events. [2024-06-21 19:14:55,910 INFO L125 PetriNetUnfolderBase]: For 119412/119418 co-relation queries the response was YES. [2024-06-21 19:14:55,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22917 conditions, 3379 events. 2007/3379 cut-off events. For 119412/119418 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21245 event pairs, 622 based on Foata normal form. 8/3385 useless extension candidates. Maximal degree in co-relation 22816. Up to 3039 conditions per place. [2024-06-21 19:14:55,948 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 228 selfloop transitions, 24 changer transitions 0/259 dead transitions. [2024-06-21 19:14:55,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 259 transitions, 4111 flow [2024-06-21 19:14:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 19:14:55,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-21 19:14:55,949 INFO L175 Difference]: Start difference. First operand has 221 places, 245 transitions, 3524 flow. Second operand 6 states and 122 transitions. [2024-06-21 19:14:55,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 259 transitions, 4111 flow [2024-06-21 19:14:56,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 259 transitions, 3991 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:56,278 INFO L231 Difference]: Finished difference. Result has 224 places, 247 transitions, 3514 flow [2024-06-21 19:14:56,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3514, PETRI_PLACES=224, PETRI_TRANSITIONS=247} [2024-06-21 19:14:56,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 19:14:56,279 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 247 transitions, 3514 flow [2024-06-21 19:14:56,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:56,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:56,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:56,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:14:56,280 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)] === [2024-06-21 19:14:56,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash 803607321, now seen corresponding path program 3 times [2024-06-21 19:14:56,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:56,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687732839] [2024-06-21 19:14:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:56,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:56,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687732839] [2024-06-21 19:14:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687732839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:56,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:56,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:56,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464931965] [2024-06-21 19:14:56,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:56,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:56,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:56,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:56,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:14:56,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 247 transitions, 3514 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:56,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:56,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:14:56,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:57,115 INFO L124 PetriNetUnfolderBase]: 2002/3372 cut-off events. [2024-06-21 19:14:57,115 INFO L125 PetriNetUnfolderBase]: For 119758/119764 co-relation queries the response was YES. [2024-06-21 19:14:57,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22925 conditions, 3372 events. 2002/3372 cut-off events. For 119758/119764 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21159 event pairs, 628 based on Foata normal form. 8/3378 useless extension candidates. Maximal degree in co-relation 22821. Up to 2999 conditions per place. [2024-06-21 19:14:57,151 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 40 changer transitions 0/261 dead transitions. [2024-06-21 19:14:57,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 261 transitions, 4111 flow [2024-06-21 19:14:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 19:14:57,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 19:14:57,152 INFO L175 Difference]: Start difference. First operand has 224 places, 247 transitions, 3514 flow. Second operand 7 states and 124 transitions. [2024-06-21 19:14:57,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 261 transitions, 4111 flow [2024-06-21 19:14:57,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 261 transitions, 4028 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:57,501 INFO L231 Difference]: Finished difference. Result has 226 places, 249 transitions, 3577 flow [2024-06-21 19:14:57,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3577, PETRI_PLACES=226, PETRI_TRANSITIONS=249} [2024-06-21 19:14:57,502 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-21 19:14:57,502 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 249 transitions, 3577 flow [2024-06-21 19:14:57,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:57,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:57,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:57,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:14:57,502 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)] === [2024-06-21 19:14:57,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1569794019, now seen corresponding path program 4 times [2024-06-21 19:14:57,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:57,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706564068] [2024-06-21 19:14:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:57,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:57,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:57,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706564068] [2024-06-21 19:14:57,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706564068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:57,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:57,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:57,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752476932] [2024-06-21 19:14:57,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:57,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:57,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:57,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:57,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 249 transitions, 3577 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:57,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:57,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:57,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:58,362 INFO L124 PetriNetUnfolderBase]: 2010/3384 cut-off events. [2024-06-21 19:14:58,362 INFO L125 PetriNetUnfolderBase]: For 120796/120802 co-relation queries the response was YES. [2024-06-21 19:14:58,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23077 conditions, 3384 events. 2010/3384 cut-off events. For 120796/120802 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21258 event pairs, 673 based on Foata normal form. 8/3390 useless extension candidates. Maximal degree in co-relation 22973. Up to 3068 conditions per place. [2024-06-21 19:14:58,396 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 234 selfloop transitions, 20 changer transitions 0/261 dead transitions. [2024-06-21 19:14:58,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 261 transitions, 4163 flow [2024-06-21 19:14:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 19:14:58,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 19:14:58,397 INFO L175 Difference]: Start difference. First operand has 226 places, 249 transitions, 3577 flow. Second operand 6 states and 120 transitions. [2024-06-21 19:14:58,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 261 transitions, 4163 flow [2024-06-21 19:14:58,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 261 transitions, 4044 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:58,745 INFO L231 Difference]: Finished difference. Result has 226 places, 251 transitions, 3557 flow [2024-06-21 19:14:58,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3557, PETRI_PLACES=226, PETRI_TRANSITIONS=251} [2024-06-21 19:14:58,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-21 19:14:58,745 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 251 transitions, 3557 flow [2024-06-21 19:14:58,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:58,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:58,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:58,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:14:58,746 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)] === [2024-06-21 19:14:58,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash 369409448, now seen corresponding path program 11 times [2024-06-21 19:14:58,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:58,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709241968] [2024-06-21 19:14:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:58,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:58,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709241968] [2024-06-21 19:14:58,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709241968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:58,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:58,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:58,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493900555] [2024-06-21 19:14:58,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:58,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:58,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:58,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:58,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:58,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:14:58,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 251 transitions, 3557 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:58,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:58,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:14:58,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:59,560 INFO L124 PetriNetUnfolderBase]: 2031/3412 cut-off events. [2024-06-21 19:14:59,560 INFO L125 PetriNetUnfolderBase]: For 120637/120637 co-relation queries the response was YES. [2024-06-21 19:14:59,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23292 conditions, 3412 events. 2031/3412 cut-off events. For 120637/120637 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21213 event pairs, 326 based on Foata normal form. 3/3410 useless extension candidates. Maximal degree in co-relation 23189. Up to 2718 conditions per place. [2024-06-21 19:14:59,596 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 218 selfloop transitions, 49 changer transitions 0/274 dead transitions. [2024-06-21 19:14:59,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 274 transitions, 4296 flow [2024-06-21 19:14:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 19:14:59,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-06-21 19:14:59,597 INFO L175 Difference]: Start difference. First operand has 226 places, 251 transitions, 3557 flow. Second operand 7 states and 141 transitions. [2024-06-21 19:14:59,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 274 transitions, 4296 flow [2024-06-21 19:14:59,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 274 transitions, 4225 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:59,919 INFO L231 Difference]: Finished difference. Result has 230 places, 257 transitions, 3730 flow [2024-06-21 19:14:59,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3730, PETRI_PLACES=230, PETRI_TRANSITIONS=257} [2024-06-21 19:14:59,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-21 19:14:59,920 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 257 transitions, 3730 flow [2024-06-21 19:14:59,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:59,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:59,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:59,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:14:59,921 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)] === [2024-06-21 19:14:59,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:59,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1392217029, now seen corresponding path program 5 times [2024-06-21 19:14:59,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:59,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036086220] [2024-06-21 19:14:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:59,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:00,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:00,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036086220] [2024-06-21 19:15:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036086220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:00,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:00,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:15:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199496039] [2024-06-21 19:15:00,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:00,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:15:00,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:15:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:15:00,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:00,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 257 transitions, 3730 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:00,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:00,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:00,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:01,018 INFO L124 PetriNetUnfolderBase]: 2026/3412 cut-off events. [2024-06-21 19:15:01,018 INFO L125 PetriNetUnfolderBase]: For 126255/126261 co-relation queries the response was YES. [2024-06-21 19:15:01,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23644 conditions, 3412 events. 2026/3412 cut-off events. For 126255/126261 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21357 event pairs, 669 based on Foata normal form. 8/3418 useless extension candidates. Maximal degree in co-relation 23539. Up to 3061 conditions per place. [2024-06-21 19:15:01,052 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 234 selfloop transitions, 31 changer transitions 0/272 dead transitions. [2024-06-21 19:15:01,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 272 transitions, 4385 flow [2024-06-21 19:15:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:15:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:15:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 19:15:01,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-21 19:15:01,053 INFO L175 Difference]: Start difference. First operand has 230 places, 257 transitions, 3730 flow. Second operand 6 states and 122 transitions. [2024-06-21 19:15:01,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 272 transitions, 4385 flow [2024-06-21 19:15:01,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 272 transitions, 4172 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 19:15:01,473 INFO L231 Difference]: Finished difference. Result has 233 places, 261 transitions, 3701 flow [2024-06-21 19:15:01,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3701, PETRI_PLACES=233, PETRI_TRANSITIONS=261} [2024-06-21 19:15:01,474 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-21 19:15:01,474 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 261 transitions, 3701 flow [2024-06-21 19:15:01,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:01,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:01,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:01,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:15:01,475 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)] === [2024-06-21 19:15:01,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:01,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1392662902, now seen corresponding path program 12 times [2024-06-21 19:15:01,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:01,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590837704] [2024-06-21 19:15:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:01,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:01,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:01,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590837704] [2024-06-21 19:15:01,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590837704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:01,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:01,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:15:01,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781754113] [2024-06-21 19:15:01,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:01,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:15:01,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:01,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:15:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:15:01,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:01,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 261 transitions, 3701 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:01,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:01,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:01,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:02,318 INFO L124 PetriNetUnfolderBase]: 2039/3428 cut-off events. [2024-06-21 19:15:02,318 INFO L125 PetriNetUnfolderBase]: For 129093/129093 co-relation queries the response was YES. [2024-06-21 19:15:02,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23430 conditions, 3428 events. 2039/3428 cut-off events. For 129093/129093 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21364 event pairs, 326 based on Foata normal form. 3/3426 useless extension candidates. Maximal degree in co-relation 23324. Up to 2478 conditions per place. [2024-06-21 19:15:02,358 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 198 selfloop transitions, 77 changer transitions 0/282 dead transitions. [2024-06-21 19:15:02,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 282 transitions, 4510 flow [2024-06-21 19:15:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:15:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:15:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 19:15:02,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2024-06-21 19:15:02,359 INFO L175 Difference]: Start difference. First operand has 233 places, 261 transitions, 3701 flow. Second operand 7 states and 143 transitions. [2024-06-21 19:15:02,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 282 transitions, 4510 flow [2024-06-21 19:15:02,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 282 transitions, 4439 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 19:15:02,740 INFO L231 Difference]: Finished difference. Result has 238 places, 264 transitions, 3866 flow [2024-06-21 19:15:02,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3866, PETRI_PLACES=238, PETRI_TRANSITIONS=264} [2024-06-21 19:15:02,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-21 19:15:02,741 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 264 transitions, 3866 flow [2024-06-21 19:15:02,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:02,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:02,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:02,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:15:02,741 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)] === [2024-06-21 19:15:02,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1392662716, now seen corresponding path program 6 times [2024-06-21 19:15:02,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:02,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599382481] [2024-06-21 19:15:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:02,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:03,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:03,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599382481] [2024-06-21 19:15:03,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599382481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:03,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:03,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:15:03,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168531461] [2024-06-21 19:15:03,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:03,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:15:03,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:03,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:15:03,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:15:03,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:03,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 264 transitions, 3866 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:03,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:03,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:03,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:03,825 INFO L124 PetriNetUnfolderBase]: 2060/3472 cut-off events. [2024-06-21 19:15:03,825 INFO L125 PetriNetUnfolderBase]: For 137104/137110 co-relation queries the response was YES. [2024-06-21 19:15:03,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24080 conditions, 3472 events. 2060/3472 cut-off events. For 137104/137110 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21915 event pairs, 678 based on Foata normal form. 9/3477 useless extension candidates. Maximal degree in co-relation 23972. Up to 3120 conditions per place. [2024-06-21 19:15:03,864 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 243 selfloop transitions, 30 changer transitions 0/280 dead transitions. [2024-06-21 19:15:03,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 280 transitions, 4528 flow [2024-06-21 19:15:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:15:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:15:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 19:15:03,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-21 19:15:03,865 INFO L175 Difference]: Start difference. First operand has 238 places, 264 transitions, 3866 flow. Second operand 7 states and 138 transitions. [2024-06-21 19:15:03,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 280 transitions, 4528 flow [2024-06-21 19:15:04,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 280 transitions, 4268 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:04,224 INFO L231 Difference]: Finished difference. Result has 240 places, 267 transitions, 3730 flow [2024-06-21 19:15:04,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3730, PETRI_PLACES=240, PETRI_TRANSITIONS=267} [2024-06-21 19:15:04,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-21 19:15:04,225 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 267 transitions, 3730 flow [2024-06-21 19:15:04,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:04,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:04,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:04,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:15:04,225 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)] === [2024-06-21 19:15:04,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 369529418, now seen corresponding path program 13 times [2024-06-21 19:15:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:04,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137358618] [2024-06-21 19:15:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:04,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:04,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137358618] [2024-06-21 19:15:04,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137358618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:04,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:04,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:15:04,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960714726] [2024-06-21 19:15:04,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:04,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:15:04,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:04,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:15:04,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:15:04,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:04,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 267 transitions, 3730 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:04,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:04,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:04,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:04,968 INFO L124 PetriNetUnfolderBase]: 2065/3493 cut-off events. [2024-06-21 19:15:04,968 INFO L125 PetriNetUnfolderBase]: For 135457/135457 co-relation queries the response was YES. [2024-06-21 19:15:04,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23607 conditions, 3493 events. 2065/3493 cut-off events. For 135457/135457 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21914 event pairs, 345 based on Foata normal form. 3/3491 useless extension candidates. Maximal degree in co-relation 23498. Up to 2697 conditions per place. [2024-06-21 19:15:05,007 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 226 selfloop transitions, 56 changer transitions 0/289 dead transitions. [2024-06-21 19:15:05,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 289 transitions, 4551 flow [2024-06-21 19:15:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:15:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:15:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 19:15:05,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-21 19:15:05,008 INFO L175 Difference]: Start difference. First operand has 240 places, 267 transitions, 3730 flow. Second operand 7 states and 144 transitions. [2024-06-21 19:15:05,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 289 transitions, 4551 flow [2024-06-21 19:15:05,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 289 transitions, 4468 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:05,398 INFO L231 Difference]: Finished difference. Result has 242 places, 270 transitions, 3833 flow [2024-06-21 19:15:05,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3833, PETRI_PLACES=242, PETRI_TRANSITIONS=270} [2024-06-21 19:15:05,399 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-21 19:15:05,399 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 270 transitions, 3833 flow [2024-06-21 19:15:05,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:05,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:05,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:05,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:15:05,399 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)] === [2024-06-21 19:15:05,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash 369529604, now seen corresponding path program 7 times [2024-06-21 19:15:05,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:05,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169999505] [2024-06-21 19:15:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:05,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:05,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:05,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169999505] [2024-06-21 19:15:05,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169999505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:05,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:05,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:15:05,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040478462] [2024-06-21 19:15:05,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:05,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:15:05,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:05,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:15:05,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:15:05,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:05,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 270 transitions, 3833 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:05,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:05,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:05,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:06,628 INFO L124 PetriNetUnfolderBase]: 2139/3624 cut-off events. [2024-06-21 19:15:06,628 INFO L125 PetriNetUnfolderBase]: For 165744/165750 co-relation queries the response was YES. [2024-06-21 19:15:06,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24746 conditions, 3624 events. 2139/3624 cut-off events. For 165744/165750 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23125 event pairs, 717 based on Foata normal form. 26/3648 useless extension candidates. Maximal degree in co-relation 24636. Up to 3155 conditions per place. [2024-06-21 19:15:06,669 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 262 selfloop transitions, 21 changer transitions 0/290 dead transitions. [2024-06-21 19:15:06,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 290 transitions, 4615 flow [2024-06-21 19:15:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:15:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:15:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 19:15:06,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-06-21 19:15:06,670 INFO L175 Difference]: Start difference. First operand has 242 places, 270 transitions, 3833 flow. Second operand 7 states and 139 transitions. [2024-06-21 19:15:06,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 290 transitions, 4615 flow [2024-06-21 19:15:07,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 290 transitions, 4368 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:07,051 INFO L231 Difference]: Finished difference. Result has 244 places, 272 transitions, 3705 flow [2024-06-21 19:15:07,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3705, PETRI_PLACES=244, PETRI_TRANSITIONS=272} [2024-06-21 19:15:07,051 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-21 19:15:07,052 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 272 transitions, 3705 flow [2024-06-21 19:15:07,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:07,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:07,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:07,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:15:07,052 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)] === [2024-06-21 19:15:07,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:07,053 INFO L85 PathProgramCache]: Analyzing trace with hash -463525616, now seen corresponding path program 8 times [2024-06-21 19:15:07,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:07,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21559401] [2024-06-21 19:15:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:07,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:07,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:07,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21559401] [2024-06-21 19:15:07,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21559401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:07,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:07,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:15:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999561085] [2024-06-21 19:15:07,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:07,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:15:07,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:15:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:15:07,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:07,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 272 transitions, 3705 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:07,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:07,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:07,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:08,092 INFO L124 PetriNetUnfolderBase]: 2131/3605 cut-off events. [2024-06-21 19:15:08,092 INFO L125 PetriNetUnfolderBase]: For 143240/143246 co-relation queries the response was YES. [2024-06-21 19:15:08,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24141 conditions, 3605 events. 2131/3605 cut-off events. For 143240/143246 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22967 event pairs, 706 based on Foata normal form. 9/3610 useless extension candidates. Maximal degree in co-relation 24030. Up to 3149 conditions per place. [2024-06-21 19:15:08,133 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 239 selfloop transitions, 42 changer transitions 0/288 dead transitions. [2024-06-21 19:15:08,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 288 transitions, 4381 flow [2024-06-21 19:15:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:15:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:15:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 19:15:08,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-06-21 19:15:08,134 INFO L175 Difference]: Start difference. First operand has 244 places, 272 transitions, 3705 flow. Second operand 8 states and 157 transitions. [2024-06-21 19:15:08,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 288 transitions, 4381 flow [2024-06-21 19:15:08,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 288 transitions, 4306 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:08,492 INFO L231 Difference]: Finished difference. Result has 247 places, 273 transitions, 3756 flow [2024-06-21 19:15:08,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3756, PETRI_PLACES=247, PETRI_TRANSITIONS=273} [2024-06-21 19:15:08,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-21 19:15:08,493 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 273 transitions, 3756 flow [2024-06-21 19:15:08,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:08,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:08,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:08,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:15:08,494 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)] === [2024-06-21 19:15:08,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:08,494 INFO L85 PathProgramCache]: Analyzing trace with hash 803615257, now seen corresponding path program 1 times [2024-06-21 19:15:08,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:08,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004548610] [2024-06-21 19:15:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:08,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:09,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:09,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004548610] [2024-06-21 19:15:09,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004548610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:09,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650569467] [2024-06-21 19:15:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:09,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:09,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:15:09,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 273 transitions, 3756 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:09,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:09,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:15:09,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:09,726 INFO L124 PetriNetUnfolderBase]: 2118/3591 cut-off events. [2024-06-21 19:15:09,726 INFO L125 PetriNetUnfolderBase]: For 144326/144326 co-relation queries the response was YES. [2024-06-21 19:15:09,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23791 conditions, 3591 events. 2118/3591 cut-off events. For 144326/144326 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22989 event pairs, 899 based on Foata normal form. 6/3594 useless extension candidates. Maximal degree in co-relation 23678. Up to 3157 conditions per place. [2024-06-21 19:15:09,765 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 263 selfloop transitions, 22 changer transitions 0/291 dead transitions. [2024-06-21 19:15:09,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 291 transitions, 4420 flow [2024-06-21 19:15:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:15:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:15:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 19:15:09,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 19:15:09,766 INFO L175 Difference]: Start difference. First operand has 247 places, 273 transitions, 3756 flow. Second operand 8 states and 144 transitions. [2024-06-21 19:15:09,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 291 transitions, 4420 flow [2024-06-21 19:15:10,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 291 transitions, 4286 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:10,275 INFO L231 Difference]: Finished difference. Result has 248 places, 273 transitions, 3672 flow [2024-06-21 19:15:10,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3672, PETRI_PLACES=248, PETRI_TRANSITIONS=273} [2024-06-21 19:15:10,276 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-21 19:15:10,276 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 273 transitions, 3672 flow [2024-06-21 19:15:10,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:10,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:10,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:10,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:15:10,276 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)] === [2024-06-21 19:15:10,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:10,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1364405445, now seen corresponding path program 1 times [2024-06-21 19:15:10,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:10,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146137921] [2024-06-21 19:15:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:10,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:10,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:10,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146137921] [2024-06-21 19:15:10,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146137921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:10,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:10,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:15:10,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941763784] [2024-06-21 19:15:10,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:10,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:15:10,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:10,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:15:10,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:15:10,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:15:10,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 273 transitions, 3672 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-21 19:15:10,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:10,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:15:10,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:11,323 INFO L124 PetriNetUnfolderBase]: 2466/4219 cut-off events. [2024-06-21 19:15:11,324 INFO L125 PetriNetUnfolderBase]: For 203460/203508 co-relation queries the response was YES. [2024-06-21 19:15:11,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28608 conditions, 4219 events. 2466/4219 cut-off events. For 203460/203508 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28065 event pairs, 189 based on Foata normal form. 56/4259 useless extension candidates. Maximal degree in co-relation 28494. Up to 2123 conditions per place. [2024-06-21 19:15:11,363 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 230 selfloop transitions, 84 changer transitions 0/357 dead transitions. [2024-06-21 19:15:11,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 357 transitions, 5361 flow [2024-06-21 19:15:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:15:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:15:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 19:15:11,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-21 19:15:11,364 INFO L175 Difference]: Start difference. First operand has 248 places, 273 transitions, 3672 flow. Second operand 8 states and 156 transitions. [2024-06-21 19:15:11,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 357 transitions, 5361 flow [2024-06-21 19:15:11,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 357 transitions, 5293 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:11,771 INFO L231 Difference]: Finished difference. Result has 250 places, 300 transitions, 4237 flow [2024-06-21 19:15:11,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4237, PETRI_PLACES=250, PETRI_TRANSITIONS=300} [2024-06-21 19:15:11,772 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-21 19:15:11,772 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 300 transitions, 4237 flow [2024-06-21 19:15:11,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-21 19:15:11,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:11,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:11,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:15:11,772 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)] === [2024-06-21 19:15:11,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1870353811, now seen corresponding path program 2 times [2024-06-21 19:15:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:11,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703349735] [2024-06-21 19:15:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:12,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703349735] [2024-06-21 19:15:12,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703349735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:12,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:12,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:12,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261396672] [2024-06-21 19:15:12,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:12,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:12,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:12,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:12,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:12,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:12,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 300 transitions, 4237 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:12,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:12,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:12,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:12,843 INFO L124 PetriNetUnfolderBase]: 2617/4412 cut-off events. [2024-06-21 19:15:12,843 INFO L125 PetriNetUnfolderBase]: For 182077/182083 co-relation queries the response was YES. [2024-06-21 19:15:12,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30846 conditions, 4412 events. 2617/4412 cut-off events. For 182077/182083 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 28973 event pairs, 523 based on Foata normal form. 8/4402 useless extension candidates. Maximal degree in co-relation 30732. Up to 3421 conditions per place. [2024-06-21 19:15:12,891 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 241 selfloop transitions, 84 changer transitions 0/332 dead transitions. [2024-06-21 19:15:12,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 332 transitions, 5181 flow [2024-06-21 19:15:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:15:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:15:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 19:15:12,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:15:12,892 INFO L175 Difference]: Start difference. First operand has 250 places, 300 transitions, 4237 flow. Second operand 8 states and 168 transitions. [2024-06-21 19:15:12,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 332 transitions, 5181 flow [2024-06-21 19:15:13,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 332 transitions, 5087 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 19:15:13,415 INFO L231 Difference]: Finished difference. Result has 256 places, 306 transitions, 4479 flow [2024-06-21 19:15:13,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4479, PETRI_PLACES=256, PETRI_TRANSITIONS=306} [2024-06-21 19:15:13,415 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-21 19:15:13,415 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 306 transitions, 4479 flow [2024-06-21 19:15:13,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:13,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:13,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:13,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:15:13,416 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)] === [2024-06-21 19:15:13,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:13,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1888865307, now seen corresponding path program 3 times [2024-06-21 19:15:13,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:13,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425462449] [2024-06-21 19:15:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:13,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:13,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:13,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425462449] [2024-06-21 19:15:13,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425462449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:13,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:13,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:13,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102201978] [2024-06-21 19:15:13,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:13,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:13,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:13,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:13,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:13,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:13,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 306 transitions, 4479 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:13,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:13,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:13,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:14,469 INFO L124 PetriNetUnfolderBase]: 2625/4424 cut-off events. [2024-06-21 19:15:14,469 INFO L125 PetriNetUnfolderBase]: For 188984/188990 co-relation queries the response was YES. [2024-06-21 19:15:14,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31400 conditions, 4424 events. 2625/4424 cut-off events. For 188984/188990 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29086 event pairs, 568 based on Foata normal form. 8/4418 useless extension candidates. Maximal degree in co-relation 31284. Up to 3655 conditions per place. [2024-06-21 19:15:14,519 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 266 selfloop transitions, 57 changer transitions 0/330 dead transitions. [2024-06-21 19:15:14,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 330 transitions, 5255 flow [2024-06-21 19:15:14,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:15:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:15:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 19:15:14,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-21 19:15:14,520 INFO L175 Difference]: Start difference. First operand has 256 places, 306 transitions, 4479 flow. Second operand 8 states and 162 transitions. [2024-06-21 19:15:14,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 330 transitions, 5255 flow [2024-06-21 19:15:15,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 330 transitions, 5026 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:15,020 INFO L231 Difference]: Finished difference. Result has 258 places, 309 transitions, 4448 flow [2024-06-21 19:15:15,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4268, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4448, PETRI_PLACES=258, PETRI_TRANSITIONS=309} [2024-06-21 19:15:15,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-21 19:15:15,021 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 309 transitions, 4448 flow [2024-06-21 19:15:15,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:15,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:15,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:15,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:15:15,021 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)] === [2024-06-21 19:15:15,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:15,022 INFO L85 PathProgramCache]: Analyzing trace with hash 586622813, now seen corresponding path program 4 times [2024-06-21 19:15:15,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:15,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754652234] [2024-06-21 19:15:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:15,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:15,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:15,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754652234] [2024-06-21 19:15:15,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754652234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:15,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:15,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:15,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075515380] [2024-06-21 19:15:15,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:15,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:15,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:15,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:15,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:15,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 309 transitions, 4448 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:15,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:15,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:15,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:16,314 INFO L124 PetriNetUnfolderBase]: 2674/4507 cut-off events. [2024-06-21 19:15:16,314 INFO L125 PetriNetUnfolderBase]: For 198082/198088 co-relation queries the response was YES. [2024-06-21 19:15:16,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32052 conditions, 4507 events. 2674/4507 cut-off events. For 198082/198088 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29687 event pairs, 485 based on Foata normal form. 8/4502 useless extension candidates. Maximal degree in co-relation 31936. Up to 3631 conditions per place. [2024-06-21 19:15:16,364 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 257 selfloop transitions, 74 changer transitions 0/338 dead transitions. [2024-06-21 19:15:16,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 338 transitions, 5404 flow [2024-06-21 19:15:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:15:16,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:15:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 19:15:16,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-21 19:15:16,365 INFO L175 Difference]: Start difference. First operand has 258 places, 309 transitions, 4448 flow. Second operand 8 states and 167 transitions. [2024-06-21 19:15:16,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 338 transitions, 5404 flow [2024-06-21 19:15:16,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 338 transitions, 5272 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:16,873 INFO L231 Difference]: Finished difference. Result has 260 places, 313 transitions, 4586 flow [2024-06-21 19:15:16,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4318, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4586, PETRI_PLACES=260, PETRI_TRANSITIONS=313} [2024-06-21 19:15:16,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-21 19:15:16,874 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 313 transitions, 4586 flow [2024-06-21 19:15:16,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:16,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:16,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:16,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:15:16,874 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)] === [2024-06-21 19:15:16,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1940059590, now seen corresponding path program 1 times [2024-06-21 19:15:16,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:16,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701170918] [2024-06-21 19:15:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:16,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:17,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701170918] [2024-06-21 19:15:17,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701170918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:17,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:17,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:17,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154727640] [2024-06-21 19:15:17,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:17,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:17,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:17,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:17,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 313 transitions, 4586 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:17,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:17,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:18,339 INFO L124 PetriNetUnfolderBase]: 2867/4835 cut-off events. [2024-06-21 19:15:18,339 INFO L125 PetriNetUnfolderBase]: For 247748/247754 co-relation queries the response was YES. [2024-06-21 19:15:18,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35419 conditions, 4835 events. 2867/4835 cut-off events. For 247748/247754 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 32328 event pairs, 514 based on Foata normal form. 21/4841 useless extension candidates. Maximal degree in co-relation 35303. Up to 3564 conditions per place. [2024-06-21 19:15:18,392 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 267 selfloop transitions, 81 changer transitions 0/355 dead transitions. [2024-06-21 19:15:18,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 355 transitions, 5700 flow [2024-06-21 19:15:18,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-21 19:15:18,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-06-21 19:15:18,393 INFO L175 Difference]: Start difference. First operand has 260 places, 313 transitions, 4586 flow. Second operand 10 states and 207 transitions. [2024-06-21 19:15:18,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 355 transitions, 5700 flow [2024-06-21 19:15:19,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 355 transitions, 5572 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 19:15:19,058 INFO L231 Difference]: Finished difference. Result has 267 places, 318 transitions, 4716 flow [2024-06-21 19:15:19,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4716, PETRI_PLACES=267, PETRI_TRANSITIONS=318} [2024-06-21 19:15:19,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-21 19:15:19,058 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 318 transitions, 4716 flow [2024-06-21 19:15:19,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:19,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:19,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:19,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:15:19,058 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)] === [2024-06-21 19:15:19,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1597676819, now seen corresponding path program 1 times [2024-06-21 19:15:19,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:19,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288103662] [2024-06-21 19:15:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:19,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:19,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:19,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288103662] [2024-06-21 19:15:19,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288103662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:19,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:19,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:19,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113656319] [2024-06-21 19:15:19,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:19,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:19,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:19,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:15:19,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 318 transitions, 4716 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:19,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:19,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:15:19,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:20,459 INFO L124 PetriNetUnfolderBase]: 2895/4895 cut-off events. [2024-06-21 19:15:20,459 INFO L125 PetriNetUnfolderBase]: For 244070/244082 co-relation queries the response was YES. [2024-06-21 19:15:20,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36262 conditions, 4895 events. 2895/4895 cut-off events. For 244070/244082 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32963 event pairs, 621 based on Foata normal form. 18/4905 useless extension candidates. Maximal degree in co-relation 36142. Up to 4040 conditions per place. [2024-06-21 19:15:20,517 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 287 selfloop transitions, 65 changer transitions 0/358 dead transitions. [2024-06-21 19:15:20,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 358 transitions, 5607 flow [2024-06-21 19:15:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:15:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:15:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-21 19:15:20,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 19:15:20,518 INFO L175 Difference]: Start difference. First operand has 267 places, 318 transitions, 4716 flow. Second operand 12 states and 212 transitions. [2024-06-21 19:15:20,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 358 transitions, 5607 flow [2024-06-21 19:15:21,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 358 transitions, 5480 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:21,261 INFO L231 Difference]: Finished difference. Result has 273 places, 322 transitions, 4813 flow [2024-06-21 19:15:21,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4589, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4813, PETRI_PLACES=273, PETRI_TRANSITIONS=322} [2024-06-21 19:15:21,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-21 19:15:21,262 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 322 transitions, 4813 flow [2024-06-21 19:15:21,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:21,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:21,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:21,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:15:21,263 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)] === [2024-06-21 19:15:21,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1605951029, now seen corresponding path program 2 times [2024-06-21 19:15:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:21,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611947279] [2024-06-21 19:15:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:21,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:21,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:21,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611947279] [2024-06-21 19:15:21,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611947279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:21,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:21,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:21,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939028809] [2024-06-21 19:15:21,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:21,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:21,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:21,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:21,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 322 transitions, 4813 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:21,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:21,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:21,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:22,556 INFO L124 PetriNetUnfolderBase]: 2903/4902 cut-off events. [2024-06-21 19:15:22,557 INFO L125 PetriNetUnfolderBase]: For 242961/242967 co-relation queries the response was YES. [2024-06-21 19:15:22,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36516 conditions, 4902 events. 2903/4902 cut-off events. For 242961/242967 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 32964 event pairs, 628 based on Foata normal form. 8/4899 useless extension candidates. Maximal degree in co-relation 36394. Up to 4098 conditions per place. [2024-06-21 19:15:22,616 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 277 selfloop transitions, 59 changer transitions 0/343 dead transitions. [2024-06-21 19:15:22,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 343 transitions, 5597 flow [2024-06-21 19:15:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:15:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:15:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 19:15:22,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 19:15:22,618 INFO L175 Difference]: Start difference. First operand has 273 places, 322 transitions, 4813 flow. Second operand 8 states and 160 transitions. [2024-06-21 19:15:22,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 343 transitions, 5597 flow [2024-06-21 19:15:23,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 343 transitions, 5456 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 19:15:23,512 INFO L231 Difference]: Finished difference. Result has 272 places, 324 transitions, 4855 flow [2024-06-21 19:15:23,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4855, PETRI_PLACES=272, PETRI_TRANSITIONS=324} [2024-06-21 19:15:23,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-21 19:15:23,512 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 324 transitions, 4855 flow [2024-06-21 19:15:23,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:23,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:23,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:23,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:15:23,513 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)] === [2024-06-21 19:15:23,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:23,513 INFO L85 PathProgramCache]: Analyzing trace with hash -905105949, now seen corresponding path program 5 times [2024-06-21 19:15:23,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:23,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947631503] [2024-06-21 19:15:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:23,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:23,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:23,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947631503] [2024-06-21 19:15:23,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947631503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:23,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:23,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:23,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048737731] [2024-06-21 19:15:23,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:23,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:23,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:23,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:23,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 324 transitions, 4855 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:23,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:23,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:23,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:24,785 INFO L124 PetriNetUnfolderBase]: 2911/4916 cut-off events. [2024-06-21 19:15:24,785 INFO L125 PetriNetUnfolderBase]: For 253140/253146 co-relation queries the response was YES. [2024-06-21 19:15:24,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36976 conditions, 4916 events. 2911/4916 cut-off events. For 253140/253146 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33091 event pairs, 626 based on Foata normal form. 8/4912 useless extension candidates. Maximal degree in co-relation 36854. Up to 4110 conditions per place. [2024-06-21 19:15:24,846 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 279 selfloop transitions, 59 changer transitions 0/345 dead transitions. [2024-06-21 19:15:24,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 345 transitions, 5635 flow [2024-06-21 19:15:24,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:15:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:15:24,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 19:15:24,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 19:15:24,847 INFO L175 Difference]: Start difference. First operand has 272 places, 324 transitions, 4855 flow. Second operand 8 states and 160 transitions. [2024-06-21 19:15:24,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 345 transitions, 5635 flow [2024-06-21 19:15:25,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 345 transitions, 5488 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:25,798 INFO L231 Difference]: Finished difference. Result has 274 places, 326 transitions, 4883 flow [2024-06-21 19:15:25,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4708, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4883, PETRI_PLACES=274, PETRI_TRANSITIONS=326} [2024-06-21 19:15:25,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 19:15:25,798 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 326 transitions, 4883 flow [2024-06-21 19:15:25,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:25,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:25,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:25,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:15:25,799 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)] === [2024-06-21 19:15:25,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1605957756, now seen corresponding path program 2 times [2024-06-21 19:15:25,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:25,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978686427] [2024-06-21 19:15:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:26,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:26,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978686427] [2024-06-21 19:15:26,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978686427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:26,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:26,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:26,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395297631] [2024-06-21 19:15:26,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:26,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:26,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:26,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:26,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:26,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 326 transitions, 4883 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:26,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:26,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:26,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:27,250 INFO L124 PetriNetUnfolderBase]: 2956/5000 cut-off events. [2024-06-21 19:15:27,250 INFO L125 PetriNetUnfolderBase]: For 279194/279200 co-relation queries the response was YES. [2024-06-21 19:15:27,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37601 conditions, 5000 events. 2956/5000 cut-off events. For 279194/279200 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33795 event pairs, 634 based on Foata normal form. 19/5004 useless extension candidates. Maximal degree in co-relation 37478. Up to 4104 conditions per place. [2024-06-21 19:15:27,316 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 59 changer transitions 0/351 dead transitions. [2024-06-21 19:15:27,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 351 transitions, 5731 flow [2024-06-21 19:15:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 19:15:27,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-21 19:15:27,317 INFO L175 Difference]: Start difference. First operand has 274 places, 326 transitions, 4883 flow. Second operand 9 states and 178 transitions. [2024-06-21 19:15:27,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 351 transitions, 5731 flow [2024-06-21 19:15:28,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 351 transitions, 5594 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:28,164 INFO L231 Difference]: Finished difference. Result has 277 places, 327 transitions, 4886 flow [2024-06-21 19:15:28,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4886, PETRI_PLACES=277, PETRI_TRANSITIONS=327} [2024-06-21 19:15:28,165 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-21 19:15:28,165 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 327 transitions, 4886 flow [2024-06-21 19:15:28,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:28,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:28,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:28,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:15:28,166 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)] === [2024-06-21 19:15:28,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:28,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1295493967, now seen corresponding path program 3 times [2024-06-21 19:15:28,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:28,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494206853] [2024-06-21 19:15:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:28,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:28,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:28,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494206853] [2024-06-21 19:15:28,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494206853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:28,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:28,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:28,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750475300] [2024-06-21 19:15:28,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:28,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:28,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:28,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:28,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:15:28,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 327 transitions, 4886 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:28,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:28,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:15:28,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:29,540 INFO L124 PetriNetUnfolderBase]: 3017/5094 cut-off events. [2024-06-21 19:15:29,541 INFO L125 PetriNetUnfolderBase]: For 274629/274635 co-relation queries the response was YES. [2024-06-21 19:15:29,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38467 conditions, 5094 events. 3017/5094 cut-off events. For 274629/274635 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34582 event pairs, 530 based on Foata normal form. 12/5097 useless extension candidates. Maximal degree in co-relation 38342. Up to 4212 conditions per place. [2024-06-21 19:15:29,610 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 301 selfloop transitions, 62 changer transitions 0/369 dead transitions. [2024-06-21 19:15:29,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 369 transitions, 5948 flow [2024-06-21 19:15:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:15:29,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 19:15:29,611 INFO L175 Difference]: Start difference. First operand has 277 places, 327 transitions, 4886 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:15:29,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 369 transitions, 5948 flow [2024-06-21 19:15:30,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 369 transitions, 5817 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:30,736 INFO L231 Difference]: Finished difference. Result has 279 places, 338 transitions, 5138 flow [2024-06-21 19:15:30,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4766, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5138, PETRI_PLACES=279, PETRI_TRANSITIONS=338} [2024-06-21 19:15:30,737 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-21 19:15:30,737 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 338 transitions, 5138 flow [2024-06-21 19:15:30,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:30,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:30,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:30,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:15:30,738 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)] === [2024-06-21 19:15:30,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:30,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2076824386, now seen corresponding path program 3 times [2024-06-21 19:15:30,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:30,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571164122] [2024-06-21 19:15:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:30,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:31,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:31,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571164122] [2024-06-21 19:15:31,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571164122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:31,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:31,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:31,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597033519] [2024-06-21 19:15:31,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:31,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:31,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:31,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 338 transitions, 5138 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:31,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:31,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:31,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:32,228 INFO L124 PetriNetUnfolderBase]: 3082/5169 cut-off events. [2024-06-21 19:15:32,228 INFO L125 PetriNetUnfolderBase]: For 285162/285168 co-relation queries the response was YES. [2024-06-21 19:15:32,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39826 conditions, 5169 events. 3082/5169 cut-off events. For 285162/285168 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34839 event pairs, 351 based on Foata normal form. 7/5163 useless extension candidates. Maximal degree in co-relation 39700. Up to 2457 conditions per place. [2024-06-21 19:15:32,287 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 221 selfloop transitions, 165 changer transitions 0/393 dead transitions. [2024-06-21 19:15:32,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 393 transitions, 6747 flow [2024-06-21 19:15:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-21 19:15:32,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-21 19:15:32,288 INFO L175 Difference]: Start difference. First operand has 279 places, 338 transitions, 5138 flow. Second operand 10 states and 216 transitions. [2024-06-21 19:15:32,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 393 transitions, 6747 flow [2024-06-21 19:15:33,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 393 transitions, 6616 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:33,271 INFO L231 Difference]: Finished difference. Result has 284 places, 351 transitions, 5718 flow [2024-06-21 19:15:33,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5007, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5718, PETRI_PLACES=284, PETRI_TRANSITIONS=351} [2024-06-21 19:15:33,272 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-21 19:15:33,272 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 351 transitions, 5718 flow [2024-06-21 19:15:33,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:33,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:33,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:33,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:15:33,272 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)] === [2024-06-21 19:15:33,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:33,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2077152676, now seen corresponding path program 4 times [2024-06-21 19:15:33,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:33,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779898001] [2024-06-21 19:15:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:33,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:33,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:33,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779898001] [2024-06-21 19:15:33,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779898001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:33,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:33,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:33,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454271373] [2024-06-21 19:15:33,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:33,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:33,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:33,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:33,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:33,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:33,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 351 transitions, 5718 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:33,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:33,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:33,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:34,910 INFO L124 PetriNetUnfolderBase]: 3203/5370 cut-off events. [2024-06-21 19:15:34,910 INFO L125 PetriNetUnfolderBase]: For 345779/345785 co-relation queries the response was YES. [2024-06-21 19:15:34,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44782 conditions, 5370 events. 3203/5370 cut-off events. For 345779/345785 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 36397 event pairs, 320 based on Foata normal form. 11/5372 useless extension candidates. Maximal degree in co-relation 44654. Up to 2490 conditions per place. [2024-06-21 19:15:34,973 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 204 selfloop transitions, 186 changer transitions 0/397 dead transitions. [2024-06-21 19:15:34,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 397 transitions, 7313 flow [2024-06-21 19:15:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-21 19:15:34,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 19:15:34,974 INFO L175 Difference]: Start difference. First operand has 284 places, 351 transitions, 5718 flow. Second operand 10 states and 215 transitions. [2024-06-21 19:15:34,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 397 transitions, 7313 flow [2024-06-21 19:15:36,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 397 transitions, 6940 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:36,044 INFO L231 Difference]: Finished difference. Result has 289 places, 360 transitions, 5994 flow [2024-06-21 19:15:36,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5391, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5994, PETRI_PLACES=289, PETRI_TRANSITIONS=360} [2024-06-21 19:15:36,045 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-21 19:15:36,045 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 360 transitions, 5994 flow [2024-06-21 19:15:36,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:36,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:36,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:36,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:15:36,045 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)] === [2024-06-21 19:15:36,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2071462006, now seen corresponding path program 5 times [2024-06-21 19:15:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:36,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106122921] [2024-06-21 19:15:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:36,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:36,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:36,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106122921] [2024-06-21 19:15:36,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106122921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:36,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:36,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:36,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110009432] [2024-06-21 19:15:36,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:36,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:36,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:36,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:36,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 360 transitions, 5994 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:36,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:36,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:36,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:37,822 INFO L124 PetriNetUnfolderBase]: 3497/5889 cut-off events. [2024-06-21 19:15:37,822 INFO L125 PetriNetUnfolderBase]: For 436201/436207 co-relation queries the response was YES. [2024-06-21 19:15:37,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50751 conditions, 5889 events. 3497/5889 cut-off events. For 436201/436207 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 40943 event pairs, 508 based on Foata normal form. 23/5895 useless extension candidates. Maximal degree in co-relation 50621. Up to 3910 conditions per place. [2024-06-21 19:15:37,900 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 266 selfloop transitions, 131 changer transitions 0/404 dead transitions. [2024-06-21 19:15:37,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 404 transitions, 7439 flow [2024-06-21 19:15:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 19:15:37,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-21 19:15:37,901 INFO L175 Difference]: Start difference. First operand has 289 places, 360 transitions, 5994 flow. Second operand 9 states and 194 transitions. [2024-06-21 19:15:37,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 404 transitions, 7439 flow [2024-06-21 19:15:39,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 404 transitions, 7158 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:39,386 INFO L231 Difference]: Finished difference. Result has 293 places, 366 transitions, 6120 flow [2024-06-21 19:15:39,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6120, PETRI_PLACES=293, PETRI_TRANSITIONS=366} [2024-06-21 19:15:39,387 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 19:15:39,387 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 366 transitions, 6120 flow [2024-06-21 19:15:39,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:39,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:39,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:39,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:15:39,388 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)] === [2024-06-21 19:15:39,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2077152893, now seen corresponding path program 1 times [2024-06-21 19:15:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:39,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406989760] [2024-06-21 19:15:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:39,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:39,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:39,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406989760] [2024-06-21 19:15:39,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406989760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:39,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:39,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:39,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575934800] [2024-06-21 19:15:39,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:39,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:39,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:39,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:39,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:39,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:39,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 366 transitions, 6120 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:39,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:39,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:39,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:41,178 INFO L124 PetriNetUnfolderBase]: 3584/6065 cut-off events. [2024-06-21 19:15:41,178 INFO L125 PetriNetUnfolderBase]: For 460426/460438 co-relation queries the response was YES. [2024-06-21 19:15:41,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52692 conditions, 6065 events. 3584/6065 cut-off events. For 460426/460438 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 43047 event pairs, 1049 based on Foata normal form. 21/6072 useless extension candidates. Maximal degree in co-relation 52560. Up to 4972 conditions per place. [2024-06-21 19:15:41,432 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 331 selfloop transitions, 63 changer transitions 0/401 dead transitions. [2024-06-21 19:15:41,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 401 transitions, 7326 flow [2024-06-21 19:15:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:41,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 19:15:41,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5305555555555556 [2024-06-21 19:15:41,433 INFO L175 Difference]: Start difference. First operand has 293 places, 366 transitions, 6120 flow. Second operand 9 states and 191 transitions. [2024-06-21 19:15:41,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 401 transitions, 7326 flow [2024-06-21 19:15:42,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 401 transitions, 7119 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:42,751 INFO L231 Difference]: Finished difference. Result has 297 places, 368 transitions, 6109 flow [2024-06-21 19:15:42,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5913, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6109, PETRI_PLACES=297, PETRI_TRANSITIONS=368} [2024-06-21 19:15:42,752 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-21 19:15:42,752 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 368 transitions, 6109 flow [2024-06-21 19:15:42,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:42,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:42,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:42,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:15:42,752 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)] === [2024-06-21 19:15:42,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2081788571, now seen corresponding path program 6 times [2024-06-21 19:15:42,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:42,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569777600] [2024-06-21 19:15:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:42,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:43,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:43,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569777600] [2024-06-21 19:15:43,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569777600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:43,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:43,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:43,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40234844] [2024-06-21 19:15:43,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:43,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:43,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:43,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:43,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 368 transitions, 6109 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:43,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:43,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:43,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:44,364 INFO L124 PetriNetUnfolderBase]: 3619/6106 cut-off events. [2024-06-21 19:15:44,364 INFO L125 PetriNetUnfolderBase]: For 460154/460160 co-relation queries the response was YES. [2024-06-21 19:15:44,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53455 conditions, 6106 events. 3619/6106 cut-off events. For 460154/460160 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 42887 event pairs, 473 based on Foata normal form. 8/6099 useless extension candidates. Maximal degree in co-relation 53321. Up to 4502 conditions per place. [2024-06-21 19:15:44,446 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 253 selfloop transitions, 134 changer transitions 0/394 dead transitions. [2024-06-21 19:15:44,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 394 transitions, 7270 flow [2024-06-21 19:15:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:15:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:15:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 19:15:44,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 19:15:44,447 INFO L175 Difference]: Start difference. First operand has 297 places, 368 transitions, 6109 flow. Second operand 7 states and 150 transitions. [2024-06-21 19:15:44,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 394 transitions, 7270 flow [2024-06-21 19:15:46,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 394 transitions, 7198 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 19:15:46,026 INFO L231 Difference]: Finished difference. Result has 301 places, 375 transitions, 6618 flow [2024-06-21 19:15:46,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6039, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6618, PETRI_PLACES=301, PETRI_TRANSITIONS=375} [2024-06-21 19:15:46,027 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-21 19:15:46,027 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 375 transitions, 6618 flow [2024-06-21 19:15:46,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:46,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:46,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:46,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:15:46,027 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)] === [2024-06-21 19:15:46,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash -912775745, now seen corresponding path program 4 times [2024-06-21 19:15:46,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:46,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084476673] [2024-06-21 19:15:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:46,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:46,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:46,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084476673] [2024-06-21 19:15:46,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084476673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:46,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:46,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:46,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463400978] [2024-06-21 19:15:46,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:46,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:46,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:46,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:46,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:46,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:46,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 375 transitions, 6618 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:46,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:46,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:46,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:47,579 INFO L124 PetriNetUnfolderBase]: 3666/6193 cut-off events. [2024-06-21 19:15:47,580 INFO L125 PetriNetUnfolderBase]: For 488502/488508 co-relation queries the response was YES. [2024-06-21 19:15:47,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55810 conditions, 6193 events. 3666/6193 cut-off events. For 488502/488508 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 43661 event pairs, 576 based on Foata normal form. 8/6194 useless extension candidates. Maximal degree in co-relation 55674. Up to 4592 conditions per place. [2024-06-21 19:15:47,665 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 269 selfloop transitions, 131 changer transitions 0/407 dead transitions. [2024-06-21 19:15:47,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 407 transitions, 8027 flow [2024-06-21 19:15:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:15:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:15:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 19:15:47,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-21 19:15:47,666 INFO L175 Difference]: Start difference. First operand has 301 places, 375 transitions, 6618 flow. Second operand 7 states and 152 transitions. [2024-06-21 19:15:47,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 407 transitions, 8027 flow [2024-06-21 19:15:49,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 407 transitions, 7865 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 19:15:49,330 INFO L231 Difference]: Finished difference. Result has 307 places, 386 transitions, 7161 flow [2024-06-21 19:15:49,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7161, PETRI_PLACES=307, PETRI_TRANSITIONS=386} [2024-06-21 19:15:49,331 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-21 19:15:49,331 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 386 transitions, 7161 flow [2024-06-21 19:15:49,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:49,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:49,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:49,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:15:49,331 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)] === [2024-06-21 19:15:49,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash -912775962, now seen corresponding path program 6 times [2024-06-21 19:15:49,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:49,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174295306] [2024-06-21 19:15:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:49,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:49,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:49,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174295306] [2024-06-21 19:15:49,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174295306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:49,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:49,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:49,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461333078] [2024-06-21 19:15:49,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:49,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:49,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:49,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:49,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:49,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:49,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 386 transitions, 7161 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:49,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:49,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:49,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:51,069 INFO L124 PetriNetUnfolderBase]: 3637/6159 cut-off events. [2024-06-21 19:15:51,069 INFO L125 PetriNetUnfolderBase]: For 489815/489821 co-relation queries the response was YES. [2024-06-21 19:15:51,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55913 conditions, 6159 events. 3637/6159 cut-off events. For 489815/489821 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 43495 event pairs, 580 based on Foata normal form. 19/6171 useless extension candidates. Maximal degree in co-relation 55774. Up to 4591 conditions per place. [2024-06-21 19:15:51,157 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 270 selfloop transitions, 133 changer transitions 0/410 dead transitions. [2024-06-21 19:15:51,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 410 transitions, 8257 flow [2024-06-21 19:15:51,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:15:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:15:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 19:15:51,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:15:51,158 INFO L175 Difference]: Start difference. First operand has 307 places, 386 transitions, 7161 flow. Second operand 8 states and 168 transitions. [2024-06-21 19:15:51,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 410 transitions, 8257 flow [2024-06-21 19:15:52,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 410 transitions, 8137 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-21 19:15:52,923 INFO L231 Difference]: Finished difference. Result has 313 places, 386 transitions, 7314 flow [2024-06-21 19:15:52,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7041, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7314, PETRI_PLACES=313, PETRI_TRANSITIONS=386} [2024-06-21 19:15:52,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-21 19:15:52,923 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 386 transitions, 7314 flow [2024-06-21 19:15:52,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:52,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:52,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:52,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:15:52,924 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)] === [2024-06-21 19:15:52,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1506406629, now seen corresponding path program 1 times [2024-06-21 19:15:52,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:52,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222118893] [2024-06-21 19:15:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:52,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:53,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:53,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222118893] [2024-06-21 19:15:53,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222118893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:53,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:53,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270117999] [2024-06-21 19:15:53,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:53,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:53,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:15:53,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 386 transitions, 7314 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:53,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:53,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:15:53,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:54,823 INFO L124 PetriNetUnfolderBase]: 3632/6140 cut-off events. [2024-06-21 19:15:54,823 INFO L125 PetriNetUnfolderBase]: For 474297/474303 co-relation queries the response was YES. [2024-06-21 19:15:54,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56078 conditions, 6140 events. 3632/6140 cut-off events. For 474297/474303 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 43570 event pairs, 1076 based on Foata normal form. 8/6144 useless extension candidates. Maximal degree in co-relation 55936. Up to 5486 conditions per place. [2024-06-21 19:15:54,905 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 358 selfloop transitions, 36 changer transitions 0/400 dead transitions. [2024-06-21 19:15:54,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 400 transitions, 8193 flow [2024-06-21 19:15:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:15:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:15:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 19:15:54,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-21 19:15:54,907 INFO L175 Difference]: Start difference. First operand has 313 places, 386 transitions, 7314 flow. Second operand 7 states and 131 transitions. [2024-06-21 19:15:54,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 400 transitions, 8193 flow [2024-06-21 19:15:56,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 400 transitions, 7924 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:56,554 INFO L231 Difference]: Finished difference. Result has 314 places, 387 transitions, 7160 flow [2024-06-21 19:15:56,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7045, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7160, PETRI_PLACES=314, PETRI_TRANSITIONS=387} [2024-06-21 19:15:56,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-21 19:15:56,555 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 387 transitions, 7160 flow [2024-06-21 19:15:56,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:56,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:56,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:56,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:15:56,556 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)] === [2024-06-21 19:15:56,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1494400856, now seen corresponding path program 7 times [2024-06-21 19:15:56,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:56,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642524899] [2024-06-21 19:15:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:56,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:56,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:56,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642524899] [2024-06-21 19:15:56,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642524899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:56,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:56,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:56,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055805926] [2024-06-21 19:15:56,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:56,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:56,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:56,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:56,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:57,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:15:57,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 387 transitions, 7160 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:57,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:57,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:15:57,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:58,281 INFO L124 PetriNetUnfolderBase]: 3585/6086 cut-off events. [2024-06-21 19:15:58,281 INFO L125 PetriNetUnfolderBase]: For 473108/473108 co-relation queries the response was YES. [2024-06-21 19:15:58,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53773 conditions, 6086 events. 3585/6086 cut-off events. For 473108/473108 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 43102 event pairs, 725 based on Foata normal form. 21/6098 useless extension candidates. Maximal degree in co-relation 53630. Up to 5050 conditions per place. [2024-06-21 19:15:58,360 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 350 selfloop transitions, 51 changer transitions 0/408 dead transitions. [2024-06-21 19:15:58,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 408 transitions, 8190 flow [2024-06-21 19:15:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:15:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:15:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 19:15:58,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-21 19:15:58,362 INFO L175 Difference]: Start difference. First operand has 314 places, 387 transitions, 7160 flow. Second operand 7 states and 142 transitions. [2024-06-21 19:15:58,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 408 transitions, 8190 flow [2024-06-21 19:15:59,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 408 transitions, 8060 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:59,770 INFO L231 Difference]: Finished difference. Result has 315 places, 388 transitions, 7160 flow [2024-06-21 19:15:59,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7036, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7160, PETRI_PLACES=315, PETRI_TRANSITIONS=388} [2024-06-21 19:15:59,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-21 19:15:59,771 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 388 transitions, 7160 flow [2024-06-21 19:15:59,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:59,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:59,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:59,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:15:59,772 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)] === [2024-06-21 19:15:59,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1494408513, now seen corresponding path program 5 times [2024-06-21 19:15:59,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:59,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411513278] [2024-06-21 19:15:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:59,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:00,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411513278] [2024-06-21 19:16:00,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411513278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:00,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:00,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:00,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860138013] [2024-06-21 19:16:00,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:00,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:00,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:00,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:00,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:00,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:00,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 388 transitions, 7160 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:00,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:00,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:00,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:01,442 INFO L124 PetriNetUnfolderBase]: 3580/6083 cut-off events. [2024-06-21 19:16:01,442 INFO L125 PetriNetUnfolderBase]: For 430659/430659 co-relation queries the response was YES. [2024-06-21 19:16:01,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53459 conditions, 6083 events. 3580/6083 cut-off events. For 430659/430659 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 43128 event pairs, 713 based on Foata normal form. 2/6076 useless extension candidates. Maximal degree in co-relation 53317. Up to 5146 conditions per place. [2024-06-21 19:16:01,513 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 343 selfloop transitions, 53 changer transitions 0/403 dead transitions. [2024-06-21 19:16:01,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 403 transitions, 8057 flow [2024-06-21 19:16:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:16:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:16:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 19:16:01,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-21 19:16:01,514 INFO L175 Difference]: Start difference. First operand has 315 places, 388 transitions, 7160 flow. Second operand 6 states and 123 transitions. [2024-06-21 19:16:01,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 403 transitions, 8057 flow [2024-06-21 19:16:02,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 403 transitions, 7955 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 19:16:02,895 INFO L231 Difference]: Finished difference. Result has 317 places, 391 transitions, 7254 flow [2024-06-21 19:16:02,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7254, PETRI_PLACES=317, PETRI_TRANSITIONS=391} [2024-06-21 19:16:02,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-21 19:16:02,896 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 391 transitions, 7254 flow [2024-06-21 19:16:02,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:02,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:02,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:02,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:16:02,897 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)] === [2024-06-21 19:16:02,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1498132233, now seen corresponding path program 6 times [2024-06-21 19:16:02,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:02,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617132372] [2024-06-21 19:16:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:02,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:03,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:03,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617132372] [2024-06-21 19:16:03,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617132372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:03,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:03,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:03,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019972944] [2024-06-21 19:16:03,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:03,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:03,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:03,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:03,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:03,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 391 transitions, 7254 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:03,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:03,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:03,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:04,567 INFO L124 PetriNetUnfolderBase]: 3562/6052 cut-off events. [2024-06-21 19:16:04,567 INFO L125 PetriNetUnfolderBase]: For 432954/432954 co-relation queries the response was YES. [2024-06-21 19:16:04,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52951 conditions, 6052 events. 3562/6052 cut-off events. For 432954/432954 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 42824 event pairs, 674 based on Foata normal form. 7/6052 useless extension candidates. Maximal degree in co-relation 52807. Up to 4167 conditions per place. [2024-06-21 19:16:04,650 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 311 selfloop transitions, 101 changer transitions 0/419 dead transitions. [2024-06-21 19:16:04,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 419 transitions, 8626 flow [2024-06-21 19:16:04,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:16:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:16:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 19:16:04,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-21 19:16:04,651 INFO L175 Difference]: Start difference. First operand has 317 places, 391 transitions, 7254 flow. Second operand 8 states and 167 transitions. [2024-06-21 19:16:04,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 419 transitions, 8626 flow [2024-06-21 19:16:06,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 419 transitions, 8467 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-21 19:16:06,360 INFO L231 Difference]: Finished difference. Result has 324 places, 396 transitions, 7501 flow [2024-06-21 19:16:06,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7105, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7501, PETRI_PLACES=324, PETRI_TRANSITIONS=396} [2024-06-21 19:16:06,361 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-21 19:16:06,361 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 396 transitions, 7501 flow [2024-06-21 19:16:06,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:06,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:06,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:06,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:16:06,361 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)] === [2024-06-21 19:16:06,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash -105612171, now seen corresponding path program 7 times [2024-06-21 19:16:06,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:06,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764262672] [2024-06-21 19:16:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:06,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:06,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764262672] [2024-06-21 19:16:06,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764262672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:06,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:06,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:16:06,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47206465] [2024-06-21 19:16:06,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:06,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:16:06,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:06,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:16:06,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:16:06,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:16:06,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 396 transitions, 7501 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:06,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:06,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:16:06,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:08,317 INFO L124 PetriNetUnfolderBase]: 3549/6037 cut-off events. [2024-06-21 19:16:08,317 INFO L125 PetriNetUnfolderBase]: For 430758/430758 co-relation queries the response was YES. [2024-06-21 19:16:08,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52872 conditions, 6037 events. 3549/6037 cut-off events. For 430758/430758 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 42806 event pairs, 681 based on Foata normal form. 6/6036 useless extension candidates. Maximal degree in co-relation 52725. Up to 5082 conditions per place. [2024-06-21 19:16:08,410 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 349 selfloop transitions, 59 changer transitions 0/414 dead transitions. [2024-06-21 19:16:08,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 414 transitions, 8370 flow [2024-06-21 19:16:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:16:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:16:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 19:16:08,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 19:16:08,411 INFO L175 Difference]: Start difference. First operand has 324 places, 396 transitions, 7501 flow. Second operand 8 states and 142 transitions. [2024-06-21 19:16:08,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 414 transitions, 8370 flow [2024-06-21 19:16:10,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 414 transitions, 7977 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:10,482 INFO L231 Difference]: Finished difference. Result has 325 places, 396 transitions, 7235 flow [2024-06-21 19:16:10,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7108, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7235, PETRI_PLACES=325, PETRI_TRANSITIONS=396} [2024-06-21 19:16:10,482 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-21 19:16:10,482 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 396 transitions, 7235 flow [2024-06-21 19:16:10,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:10,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:10,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:10,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:16:10,483 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)] === [2024-06-21 19:16:10,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:10,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1498125723, now seen corresponding path program 2 times [2024-06-21 19:16:10,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:10,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613657450] [2024-06-21 19:16:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:10,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:10,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:10,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613657450] [2024-06-21 19:16:10,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613657450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:10,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:10,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:10,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843476704] [2024-06-21 19:16:10,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:10,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:10,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:10,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:10,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 396 transitions, 7235 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:10,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:10,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:10,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:12,194 INFO L124 PetriNetUnfolderBase]: 3528/6003 cut-off events. [2024-06-21 19:16:12,194 INFO L125 PetriNetUnfolderBase]: For 414779/414785 co-relation queries the response was YES. [2024-06-21 19:16:12,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51215 conditions, 6003 events. 3528/6003 cut-off events. For 414779/414785 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42723 event pairs, 1155 based on Foata normal form. 15/6014 useless extension candidates. Maximal degree in co-relation 51070. Up to 5303 conditions per place. [2024-06-21 19:16:12,278 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 378 selfloop transitions, 27 changer transitions 0/412 dead transitions. [2024-06-21 19:16:12,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 412 transitions, 8153 flow [2024-06-21 19:16:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:16:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:16:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 19:16:12,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-21 19:16:12,280 INFO L175 Difference]: Start difference. First operand has 325 places, 396 transitions, 7235 flow. Second operand 7 states and 142 transitions. [2024-06-21 19:16:12,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 412 transitions, 8153 flow [2024-06-21 19:16:13,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 412 transitions, 7961 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:13,844 INFO L231 Difference]: Finished difference. Result has 325 places, 396 transitions, 7103 flow [2024-06-21 19:16:13,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7043, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7103, PETRI_PLACES=325, PETRI_TRANSITIONS=396} [2024-06-21 19:16:13,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-21 19:16:13,845 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 396 transitions, 7103 flow [2024-06-21 19:16:13,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:13,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:13,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:13,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:16:13,845 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)] === [2024-06-21 19:16:13,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1498119771, now seen corresponding path program 8 times [2024-06-21 19:16:13,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:13,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225827042] [2024-06-21 19:16:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:13,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:14,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225827042] [2024-06-21 19:16:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225827042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:14,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:14,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:14,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508007581] [2024-06-21 19:16:14,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:14,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:14,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:14,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:14,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:14,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 396 transitions, 7103 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:14,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:14,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:14,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:15,482 INFO L124 PetriNetUnfolderBase]: 3515/5988 cut-off events. [2024-06-21 19:16:15,482 INFO L125 PetriNetUnfolderBase]: For 395833/395833 co-relation queries the response was YES. [2024-06-21 19:16:15,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50372 conditions, 5988 events. 3515/5988 cut-off events. For 395833/395833 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 42475 event pairs, 688 based on Foata normal form. 6/5987 useless extension candidates. Maximal degree in co-relation 50227. Up to 4744 conditions per place. [2024-06-21 19:16:15,566 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 321 selfloop transitions, 84 changer transitions 0/412 dead transitions. [2024-06-21 19:16:15,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 412 transitions, 8128 flow [2024-06-21 19:16:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:16:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:16:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 19:16:15,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-21 19:16:15,567 INFO L175 Difference]: Start difference. First operand has 325 places, 396 transitions, 7103 flow. Second operand 6 states and 128 transitions. [2024-06-21 19:16:15,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 412 transitions, 8128 flow [2024-06-21 19:16:17,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 412 transitions, 8049 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:17,238 INFO L231 Difference]: Finished difference. Result has 325 places, 397 transitions, 7235 flow [2024-06-21 19:16:17,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7235, PETRI_PLACES=325, PETRI_TRANSITIONS=397} [2024-06-21 19:16:17,239 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-21 19:16:17,239 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 397 transitions, 7235 flow [2024-06-21 19:16:17,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:17,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:17,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:17,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:16:17,240 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)] === [2024-06-21 19:16:17,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1498119926, now seen corresponding path program 8 times [2024-06-21 19:16:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:17,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509673869] [2024-06-21 19:16:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:17,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:17,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509673869] [2024-06-21 19:16:17,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509673869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:17,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:17,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:17,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383036548] [2024-06-21 19:16:17,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:17,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:17,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:17,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:17,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:17,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 397 transitions, 7235 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:17,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:17,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:17,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:18,906 INFO L124 PetriNetUnfolderBase]: 3486/5952 cut-off events. [2024-06-21 19:16:18,906 INFO L125 PetriNetUnfolderBase]: For 389296/389296 co-relation queries the response was YES. [2024-06-21 19:16:18,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49506 conditions, 5952 events. 3486/5952 cut-off events. For 389296/389296 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 42212 event pairs, 693 based on Foata normal form. 13/5956 useless extension candidates. Maximal degree in co-relation 49360. Up to 4679 conditions per place. [2024-06-21 19:16:18,994 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 324 selfloop transitions, 86 changer transitions 0/417 dead transitions. [2024-06-21 19:16:18,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 417 transitions, 8341 flow [2024-06-21 19:16:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:16:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:16:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 19:16:18,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-21 19:16:18,995 INFO L175 Difference]: Start difference. First operand has 325 places, 397 transitions, 7235 flow. Second operand 7 states and 146 transitions. [2024-06-21 19:16:18,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 417 transitions, 8341 flow [2024-06-21 19:16:20,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 417 transitions, 8166 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 19:16:20,663 INFO L231 Difference]: Finished difference. Result has 329 places, 397 transitions, 7238 flow [2024-06-21 19:16:20,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7238, PETRI_PLACES=329, PETRI_TRANSITIONS=397} [2024-06-21 19:16:20,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-21 19:16:20,664 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 397 transitions, 7238 flow [2024-06-21 19:16:20,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:20,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:20,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:20,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:16:20,664 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)] === [2024-06-21 19:16:20,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:20,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1123848240, now seen corresponding path program 9 times [2024-06-21 19:16:20,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:20,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149673459] [2024-06-21 19:16:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:20,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:21,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:21,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149673459] [2024-06-21 19:16:21,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149673459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:21,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:21,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:21,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020816456] [2024-06-21 19:16:21,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:21,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:21,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:21,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:21,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:21,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:21,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 397 transitions, 7238 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:21,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:21,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:21,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:22,517 INFO L124 PetriNetUnfolderBase]: 3653/6213 cut-off events. [2024-06-21 19:16:22,517 INFO L125 PetriNetUnfolderBase]: For 428094/428100 co-relation queries the response was YES. [2024-06-21 19:16:22,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53147 conditions, 6213 events. 3653/6213 cut-off events. For 428094/428100 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 44113 event pairs, 685 based on Foata normal form. 7/6213 useless extension candidates. Maximal degree in co-relation 53000. Up to 4987 conditions per place. [2024-06-21 19:16:22,606 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 359 selfloop transitions, 81 changer transitions 0/447 dead transitions. [2024-06-21 19:16:22,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 447 transitions, 8875 flow [2024-06-21 19:16:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:16:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:16:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-21 19:16:22,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020833333333333 [2024-06-21 19:16:22,607 INFO L175 Difference]: Start difference. First operand has 329 places, 397 transitions, 7238 flow. Second operand 12 states and 241 transitions. [2024-06-21 19:16:22,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 447 transitions, 8875 flow [2024-06-21 19:16:24,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 447 transitions, 8707 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 19:16:24,334 INFO L231 Difference]: Finished difference. Result has 337 places, 407 transitions, 7483 flow [2024-06-21 19:16:24,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7070, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7483, PETRI_PLACES=337, PETRI_TRANSITIONS=407} [2024-06-21 19:16:24,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-21 19:16:24,334 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 407 transitions, 7483 flow [2024-06-21 19:16:24,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:24,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:24,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:24,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:16:24,335 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)] === [2024-06-21 19:16:24,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:24,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1123519950, now seen corresponding path program 10 times [2024-06-21 19:16:24,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:24,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273251285] [2024-06-21 19:16:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:24,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:24,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:24,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273251285] [2024-06-21 19:16:24,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273251285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:24,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:24,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:24,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508381509] [2024-06-21 19:16:24,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:24,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:24,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:24,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:24,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:24,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:24,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 407 transitions, 7483 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:24,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:24,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:24,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:26,287 INFO L124 PetriNetUnfolderBase]: 3640/6177 cut-off events. [2024-06-21 19:16:26,288 INFO L125 PetriNetUnfolderBase]: For 445656/445662 co-relation queries the response was YES. [2024-06-21 19:16:26,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53856 conditions, 6177 events. 3640/6177 cut-off events. For 445656/445662 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 43871 event pairs, 654 based on Foata normal form. 11/6181 useless extension candidates. Maximal degree in co-relation 53707. Up to 4984 conditions per place. [2024-06-21 19:16:26,365 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 353 selfloop transitions, 82 changer transitions 0/442 dead transitions. [2024-06-21 19:16:26,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 442 transitions, 8788 flow [2024-06-21 19:16:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-21 19:16:26,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-21 19:16:26,366 INFO L175 Difference]: Start difference. First operand has 337 places, 407 transitions, 7483 flow. Second operand 10 states and 205 transitions. [2024-06-21 19:16:26,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 442 transitions, 8788 flow [2024-06-21 19:16:28,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 442 transitions, 8508 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:28,145 INFO L231 Difference]: Finished difference. Result has 341 places, 411 transitions, 7442 flow [2024-06-21 19:16:28,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7219, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7442, PETRI_PLACES=341, PETRI_TRANSITIONS=411} [2024-06-21 19:16:28,146 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-21 19:16:28,146 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 411 transitions, 7442 flow [2024-06-21 19:16:28,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:28,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:28,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:28,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:16:28,147 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)] === [2024-06-21 19:16:28,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:28,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1129071275, now seen corresponding path program 9 times [2024-06-21 19:16:28,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:28,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363113421] [2024-06-21 19:16:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:28,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:28,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:28,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363113421] [2024-06-21 19:16:28,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363113421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:28,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:28,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:28,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800941172] [2024-06-21 19:16:28,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:28,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:28,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:28,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:28,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:28,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:28,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 411 transitions, 7442 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:28,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:28,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:28,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:29,985 INFO L124 PetriNetUnfolderBase]: 3648/6193 cut-off events. [2024-06-21 19:16:29,986 INFO L125 PetriNetUnfolderBase]: For 447983/447989 co-relation queries the response was YES. [2024-06-21 19:16:30,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54117 conditions, 6193 events. 3648/6193 cut-off events. For 447983/447989 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 43956 event pairs, 653 based on Foata normal form. 8/6192 useless extension candidates. Maximal degree in co-relation 53965. Up to 5207 conditions per place. [2024-06-21 19:16:30,079 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 360 selfloop transitions, 73 changer transitions 0/440 dead transitions. [2024-06-21 19:16:30,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 440 transitions, 8696 flow [2024-06-21 19:16:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:16:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:16:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 19:16:30,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027777777777778 [2024-06-21 19:16:30,080 INFO L175 Difference]: Start difference. First operand has 341 places, 411 transitions, 7442 flow. Second operand 9 states and 181 transitions. [2024-06-21 19:16:30,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 440 transitions, 8696 flow [2024-06-21 19:16:32,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 440 transitions, 8544 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:32,063 INFO L231 Difference]: Finished difference. Result has 344 places, 415 transitions, 7600 flow [2024-06-21 19:16:32,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7600, PETRI_PLACES=344, PETRI_TRANSITIONS=415} [2024-06-21 19:16:32,063 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-21 19:16:32,064 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 415 transitions, 7600 flow [2024-06-21 19:16:32,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:32,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:32,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:32,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:16:32,064 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)] === [2024-06-21 19:16:32,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:32,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2081515143, now seen corresponding path program 3 times [2024-06-21 19:16:32,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:32,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519200126] [2024-06-21 19:16:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:32,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:32,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:32,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519200126] [2024-06-21 19:16:32,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519200126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:32,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:32,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:32,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356453238] [2024-06-21 19:16:32,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:32,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:32,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:32,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:32,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:32,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 415 transitions, 7600 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:32,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:32,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:32,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:33,892 INFO L124 PetriNetUnfolderBase]: 3742/6368 cut-off events. [2024-06-21 19:16:33,892 INFO L125 PetriNetUnfolderBase]: For 488440/488452 co-relation queries the response was YES. [2024-06-21 19:16:33,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55515 conditions, 6368 events. 3742/6368 cut-off events. For 488440/488452 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 45857 event pairs, 1134 based on Foata normal form. 21/6378 useless extension candidates. Maximal degree in co-relation 55362. Up to 5587 conditions per place. [2024-06-21 19:16:33,988 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 414 selfloop transitions, 30 changer transitions 0/451 dead transitions. [2024-06-21 19:16:33,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 451 transitions, 8780 flow [2024-06-21 19:16:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:16:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:16:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 19:16:33,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-21 19:16:33,989 INFO L175 Difference]: Start difference. First operand has 344 places, 415 transitions, 7600 flow. Second operand 9 states and 184 transitions. [2024-06-21 19:16:33,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 451 transitions, 8780 flow [2024-06-21 19:16:35,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 451 transitions, 8434 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:35,979 INFO L231 Difference]: Finished difference. Result has 349 places, 419 transitions, 7402 flow [2024-06-21 19:16:35,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7254, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7402, PETRI_PLACES=349, PETRI_TRANSITIONS=419} [2024-06-21 19:16:35,979 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-21 19:16:35,979 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 419 transitions, 7402 flow [2024-06-21 19:16:35,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:35,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:35,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:35,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:16:35,980 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)] === [2024-06-21 19:16:35,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2075824256, now seen corresponding path program 11 times [2024-06-21 19:16:35,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:35,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020902614] [2024-06-21 19:16:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:35,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:36,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:36,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020902614] [2024-06-21 19:16:36,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020902614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:36,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:36,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:36,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395621285] [2024-06-21 19:16:36,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:36,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:36,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:36,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:36,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 419 transitions, 7402 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:36,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:36,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:36,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:37,943 INFO L124 PetriNetUnfolderBase]: 3861/6553 cut-off events. [2024-06-21 19:16:37,943 INFO L125 PetriNetUnfolderBase]: For 535571/535577 co-relation queries the response was YES. [2024-06-21 19:16:38,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57420 conditions, 6553 events. 3861/6553 cut-off events. For 535571/535577 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 46936 event pairs, 733 based on Foata normal form. 21/6563 useless extension candidates. Maximal degree in co-relation 57265. Up to 5352 conditions per place. [2024-06-21 19:16:38,037 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 380 selfloop transitions, 72 changer transitions 0/459 dead transitions. [2024-06-21 19:16:38,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 459 transitions, 8828 flow [2024-06-21 19:16:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 19:16:38,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 19:16:38,039 INFO L175 Difference]: Start difference. First operand has 349 places, 419 transitions, 7402 flow. Second operand 11 states and 220 transitions. [2024-06-21 19:16:38,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 459 transitions, 8828 flow [2024-06-21 19:16:40,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 459 transitions, 8756 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 19:16:40,255 INFO L231 Difference]: Finished difference. Result has 356 places, 422 transitions, 7529 flow [2024-06-21 19:16:40,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7529, PETRI_PLACES=356, PETRI_TRANSITIONS=422} [2024-06-21 19:16:40,256 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-21 19:16:40,256 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 422 transitions, 7529 flow [2024-06-21 19:16:40,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:40,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:40,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:40,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:16:40,257 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)] === [2024-06-21 19:16:40,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:40,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1937594806, now seen corresponding path program 12 times [2024-06-21 19:16:40,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:40,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270685865] [2024-06-21 19:16:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:40,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:40,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:40,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270685865] [2024-06-21 19:16:40,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270685865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:40,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:40,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:40,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433819924] [2024-06-21 19:16:40,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:40,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:40,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:40,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:40,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:40,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:40,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 422 transitions, 7529 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:40,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:40,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:40,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:42,114 INFO L124 PetriNetUnfolderBase]: 3822/6481 cut-off events. [2024-06-21 19:16:42,114 INFO L125 PetriNetUnfolderBase]: For 501188/501194 co-relation queries the response was YES. [2024-06-21 19:16:42,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55885 conditions, 6481 events. 3822/6481 cut-off events. For 501188/501194 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 46322 event pairs, 710 based on Foata normal form. 23/6495 useless extension candidates. Maximal degree in co-relation 55728. Up to 5491 conditions per place. [2024-06-21 19:16:42,408 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 370 selfloop transitions, 67 changer transitions 0/444 dead transitions. [2024-06-21 19:16:42,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 444 transitions, 8583 flow [2024-06-21 19:16:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:16:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:16:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 19:16:42,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509375 [2024-06-21 19:16:42,410 INFO L175 Difference]: Start difference. First operand has 356 places, 422 transitions, 7529 flow. Second operand 8 states and 163 transitions. [2024-06-21 19:16:42,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 444 transitions, 8583 flow [2024-06-21 19:16:44,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 444 transitions, 8455 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:44,556 INFO L231 Difference]: Finished difference. Result has 357 places, 422 transitions, 7541 flow [2024-06-21 19:16:44,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7401, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7541, PETRI_PLACES=357, PETRI_TRANSITIONS=422} [2024-06-21 19:16:44,557 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-21 19:16:44,557 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 422 transitions, 7541 flow [2024-06-21 19:16:44,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:44,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:44,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:44,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:16:44,557 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)] === [2024-06-21 19:16:44,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash 825276901, now seen corresponding path program 4 times [2024-06-21 19:16:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:44,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833311355] [2024-06-21 19:16:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:44,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:45,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:45,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833311355] [2024-06-21 19:16:45,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833311355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:45,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:45,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:45,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061302503] [2024-06-21 19:16:45,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:45,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:45,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:45,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:45,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:45,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:45,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 422 transitions, 7541 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:45,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:45,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:45,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:46,506 INFO L124 PetriNetUnfolderBase]: 3855/6582 cut-off events. [2024-06-21 19:16:46,506 INFO L125 PetriNetUnfolderBase]: For 497310/497322 co-relation queries the response was YES. [2024-06-21 19:16:46,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56593 conditions, 6582 events. 3855/6582 cut-off events. For 497310/497322 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 47946 event pairs, 1110 based on Foata normal form. 21/6595 useless extension candidates. Maximal degree in co-relation 56434. Up to 5520 conditions per place. [2024-06-21 19:16:46,611 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 404 selfloop transitions, 44 changer transitions 0/455 dead transitions. [2024-06-21 19:16:46,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 455 transitions, 8673 flow [2024-06-21 19:16:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:16:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:16:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 19:16:46,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:16:46,612 INFO L175 Difference]: Start difference. First operand has 357 places, 422 transitions, 7541 flow. Second operand 8 states and 168 transitions. [2024-06-21 19:16:46,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 455 transitions, 8673 flow [2024-06-21 19:16:48,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 455 transitions, 8543 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:48,739 INFO L231 Difference]: Finished difference. Result has 359 places, 423 transitions, 7539 flow [2024-06-21 19:16:48,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7411, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7539, PETRI_PLACES=359, PETRI_TRANSITIONS=423} [2024-06-21 19:16:48,740 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-21 19:16:48,740 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 423 transitions, 7539 flow [2024-06-21 19:16:48,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:48,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:48,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:48,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:16:48,740 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)] === [2024-06-21 19:16:48,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:48,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1794696962, now seen corresponding path program 13 times [2024-06-21 19:16:48,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:48,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832373535] [2024-06-21 19:16:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:49,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:49,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832373535] [2024-06-21 19:16:49,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832373535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:49,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:49,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:49,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639623908] [2024-06-21 19:16:49,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:49,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:49,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:49,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:49,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:49,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 423 transitions, 7539 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:49,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:49,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:49,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:51,127 INFO L124 PetriNetUnfolderBase]: 4308/7344 cut-off events. [2024-06-21 19:16:51,128 INFO L125 PetriNetUnfolderBase]: For 641484/641490 co-relation queries the response was YES. [2024-06-21 19:16:51,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65266 conditions, 7344 events. 4308/7344 cut-off events. For 641484/641490 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 53862 event pairs, 599 based on Foata normal form. 10/7349 useless extension candidates. Maximal degree in co-relation 65106. Up to 4045 conditions per place. [2024-06-21 19:16:51,242 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 347 selfloop transitions, 138 changer transitions 0/492 dead transitions. [2024-06-21 19:16:51,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 492 transitions, 9470 flow [2024-06-21 19:16:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:16:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:16:51,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-21 19:16:51,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 19:16:51,243 INFO L175 Difference]: Start difference. First operand has 359 places, 423 transitions, 7539 flow. Second operand 12 states and 258 transitions. [2024-06-21 19:16:51,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 492 transitions, 9470 flow [2024-06-21 19:16:53,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 492 transitions, 9356 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:53,624 INFO L231 Difference]: Finished difference. Result has 368 places, 438 transitions, 8067 flow [2024-06-21 19:16:53,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7425, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8067, PETRI_PLACES=368, PETRI_TRANSITIONS=438} [2024-06-21 19:16:53,625 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-21 19:16:53,625 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 438 transitions, 8067 flow [2024-06-21 19:16:53,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:53,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:53,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:53,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:16:53,625 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)] === [2024-06-21 19:16:53,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:53,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1795025469, now seen corresponding path program 5 times [2024-06-21 19:16:53,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:53,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284323771] [2024-06-21 19:16:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:53,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:54,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:54,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284323771] [2024-06-21 19:16:54,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284323771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:54,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:54,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:54,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617177756] [2024-06-21 19:16:54,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:54,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:54,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:54,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:54,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:54,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:54,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 438 transitions, 8067 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:54,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:54,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:54,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:55,873 INFO L124 PetriNetUnfolderBase]: 4341/7414 cut-off events. [2024-06-21 19:16:55,873 INFO L125 PetriNetUnfolderBase]: For 697235/697247 co-relation queries the response was YES. [2024-06-21 19:16:55,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68350 conditions, 7414 events. 4341/7414 cut-off events. For 697235/697247 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 54985 event pairs, 1259 based on Foata normal form. 21/7423 useless extension candidates. Maximal degree in co-relation 68186. Up to 6311 conditions per place. [2024-06-21 19:16:55,995 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 423 selfloop transitions, 47 changer transitions 0/477 dead transitions. [2024-06-21 19:16:55,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 477 transitions, 9327 flow [2024-06-21 19:16:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:16:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:16:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 19:16:55,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-21 19:16:55,997 INFO L175 Difference]: Start difference. First operand has 368 places, 438 transitions, 8067 flow. Second operand 9 states and 190 transitions. [2024-06-21 19:16:55,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 477 transitions, 9327 flow [2024-06-21 19:16:58,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 477 transitions, 9060 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-21 19:16:58,748 INFO L231 Difference]: Finished difference. Result has 372 places, 439 transitions, 7938 flow [2024-06-21 19:16:58,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7800, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7938, PETRI_PLACES=372, PETRI_TRANSITIONS=439} [2024-06-21 19:16:58,749 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-21 19:16:58,749 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 439 transitions, 7938 flow [2024-06-21 19:16:58,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:58,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:58,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:58,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:16:58,749 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)] === [2024-06-21 19:16:58,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:58,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2129044094, now seen corresponding path program 14 times [2024-06-21 19:16:58,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:58,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343085894] [2024-06-21 19:16:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:58,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:59,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:59,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343085894] [2024-06-21 19:16:59,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343085894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:59,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:59,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:59,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762368585] [2024-06-21 19:16:59,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:59,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:59,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:59,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:59,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:59,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:16:59,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 439 transitions, 7938 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:59,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:59,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:16:59,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:01,196 INFO L124 PetriNetUnfolderBase]: 4312/7360 cut-off events. [2024-06-21 19:17:01,196 INFO L125 PetriNetUnfolderBase]: For 670261/670267 co-relation queries the response was YES. [2024-06-21 19:17:01,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66394 conditions, 7360 events. 4312/7360 cut-off events. For 670261/670267 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 54089 event pairs, 628 based on Foata normal form. 18/7373 useless extension candidates. Maximal degree in co-relation 66229. Up to 4093 conditions per place. [2024-06-21 19:17:01,299 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 351 selfloop transitions, 122 changer transitions 0/480 dead transitions. [2024-06-21 19:17:01,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 480 transitions, 9402 flow [2024-06-21 19:17:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:17:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:17:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 19:17:01,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-21 19:17:01,301 INFO L175 Difference]: Start difference. First operand has 372 places, 439 transitions, 7938 flow. Second operand 9 states and 199 transitions. [2024-06-21 19:17:01,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 480 transitions, 9402 flow [2024-06-21 19:17:03,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 480 transitions, 9251 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 19:17:03,937 INFO L231 Difference]: Finished difference. Result has 375 places, 439 transitions, 8051 flow [2024-06-21 19:17:03,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8051, PETRI_PLACES=375, PETRI_TRANSITIONS=439} [2024-06-21 19:17:03,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-21 19:17:03,938 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 439 transitions, 8051 flow [2024-06-21 19:17:03,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:03,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:03,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:03,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:17:03,938 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)] === [2024-06-21 19:17:03,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2115889957, now seen corresponding path program 6 times [2024-06-21 19:17:03,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:03,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451750348] [2024-06-21 19:17:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:03,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:04,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:04,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451750348] [2024-06-21 19:17:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451750348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:04,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:17:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078876012] [2024-06-21 19:17:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:04,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:17:04,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:17:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:17:04,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:17:04,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 439 transitions, 8051 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:04,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:04,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:17:04,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:06,129 INFO L124 PetriNetUnfolderBase]: 4432/7560 cut-off events. [2024-06-21 19:17:06,129 INFO L125 PetriNetUnfolderBase]: For 724490/724502 co-relation queries the response was YES. [2024-06-21 19:17:06,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69445 conditions, 7560 events. 4432/7560 cut-off events. For 724490/724502 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 56223 event pairs, 1165 based on Foata normal form. 21/7565 useless extension candidates. Maximal degree in co-relation 69279. Up to 5693 conditions per place. [2024-06-21 19:17:06,256 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 382 selfloop transitions, 93 changer transitions 0/482 dead transitions. [2024-06-21 19:17:06,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 482 transitions, 9814 flow [2024-06-21 19:17:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:17:06,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:17:06,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 19:17:06,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-21 19:17:06,257 INFO L175 Difference]: Start difference. First operand has 375 places, 439 transitions, 8051 flow. Second operand 9 states and 194 transitions. [2024-06-21 19:17:06,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 482 transitions, 9814 flow [2024-06-21 19:17:09,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 482 transitions, 9531 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 19:17:09,652 INFO L231 Difference]: Finished difference. Result has 374 places, 442 transitions, 8088 flow [2024-06-21 19:17:09,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7788, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8088, PETRI_PLACES=374, PETRI_TRANSITIONS=442} [2024-06-21 19:17:09,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-21 19:17:09,653 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 442 transitions, 8088 flow [2024-06-21 19:17:09,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:09,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:09,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:09,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 19:17:09,653 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)] === [2024-06-21 19:17:09,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2116156867, now seen corresponding path program 7 times [2024-06-21 19:17:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:09,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488052891] [2024-06-21 19:17:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:09,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:10,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:10,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488052891] [2024-06-21 19:17:10,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488052891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:10,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:10,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:17:10,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832516530] [2024-06-21 19:17:10,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:10,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:17:10,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:10,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:17:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:17:10,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:17:10,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 442 transitions, 8088 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:10,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:10,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:17:10,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:12,096 INFO L124 PetriNetUnfolderBase]: 4411/7538 cut-off events. [2024-06-21 19:17:12,096 INFO L125 PetriNetUnfolderBase]: For 663485/663497 co-relation queries the response was YES. [2024-06-21 19:17:12,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67403 conditions, 7538 events. 4411/7538 cut-off events. For 663485/663497 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 56094 event pairs, 1196 based on Foata normal form. 21/7543 useless extension candidates. Maximal degree in co-relation 67238. Up to 5684 conditions per place. [2024-06-21 19:17:12,199 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 382 selfloop transitions, 94 changer transitions 0/483 dead transitions. [2024-06-21 19:17:12,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 483 transitions, 9615 flow [2024-06-21 19:17:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:12,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-21 19:17:12,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:17:12,200 INFO L175 Difference]: Start difference. First operand has 374 places, 442 transitions, 8088 flow. Second operand 10 states and 210 transitions. [2024-06-21 19:17:12,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 483 transitions, 9615 flow [2024-06-21 19:17:15,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 483 transitions, 9466 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 19:17:15,020 INFO L231 Difference]: Finished difference. Result has 380 places, 442 transitions, 8131 flow [2024-06-21 19:17:15,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7939, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8131, PETRI_PLACES=380, PETRI_TRANSITIONS=442} [2024-06-21 19:17:15,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-21 19:17:15,021 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 442 transitions, 8131 flow [2024-06-21 19:17:15,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:15,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:15,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:15,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 19:17:15,021 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)] === [2024-06-21 19:17:15,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:15,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2116157084, now seen corresponding path program 15 times [2024-06-21 19:17:15,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:15,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975736694] [2024-06-21 19:17:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:15,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:15,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:15,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975736694] [2024-06-21 19:17:15,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975736694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:15,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:15,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:17:15,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108215523] [2024-06-21 19:17:15,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:15,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:17:15,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:15,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:17:15,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:17:15,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:17:15,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 442 transitions, 8131 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:15,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:15,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:17:15,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:17,317 INFO L124 PetriNetUnfolderBase]: 4532/7728 cut-off events. [2024-06-21 19:17:17,318 INFO L125 PetriNetUnfolderBase]: For 712389/712395 co-relation queries the response was YES. [2024-06-21 19:17:17,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70881 conditions, 7728 events. 4532/7728 cut-off events. For 712389/712395 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 57469 event pairs, 665 based on Foata normal form. 11/7734 useless extension candidates. Maximal degree in co-relation 70714. Up to 2956 conditions per place. [2024-06-21 19:17:17,439 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 243 selfloop transitions, 250 changer transitions 0/500 dead transitions. [2024-06-21 19:17:17,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 500 transitions, 10519 flow [2024-06-21 19:17:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-21 19:17:17,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:17:17,440 INFO L175 Difference]: Start difference. First operand has 380 places, 442 transitions, 8131 flow. Second operand 11 states and 231 transitions. [2024-06-21 19:17:17,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 500 transitions, 10519 flow [2024-06-21 19:17:20,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 500 transitions, 10317 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 19:17:20,584 INFO L231 Difference]: Finished difference. Result has 383 places, 449 transitions, 8757 flow [2024-06-21 19:17:20,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7929, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8757, PETRI_PLACES=383, PETRI_TRANSITIONS=449} [2024-06-21 19:17:20,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-21 19:17:20,585 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 449 transitions, 8757 flow [2024-06-21 19:17:20,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:20,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:20,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:20,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 19:17:20,585 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)] === [2024-06-21 19:17:20,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2106452183, now seen corresponding path program 10 times [2024-06-21 19:17:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:20,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450509794] [2024-06-21 19:17:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:20,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:20,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:20,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450509794] [2024-06-21 19:17:20,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450509794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:20,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:20,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:17:20,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378583739] [2024-06-21 19:17:20,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:20,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:17:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:17:20,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:17:20,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:17:20,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 449 transitions, 8757 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:20,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:20,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:17:20,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:22,933 INFO L124 PetriNetUnfolderBase]: 4547/7743 cut-off events. [2024-06-21 19:17:22,933 INFO L125 PetriNetUnfolderBase]: For 739111/739117 co-relation queries the response was YES. [2024-06-21 19:17:23,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73580 conditions, 7743 events. 4547/7743 cut-off events. For 739111/739117 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 57348 event pairs, 867 based on Foata normal form. 8/7728 useless extension candidates. Maximal degree in co-relation 73411. Up to 5721 conditions per place. [2024-06-21 19:17:23,042 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 305 selfloop transitions, 162 changer transitions 0/474 dead transitions. [2024-06-21 19:17:23,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 474 transitions, 10167 flow [2024-06-21 19:17:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:17:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:17:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 19:17:23,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:17:23,043 INFO L175 Difference]: Start difference. First operand has 383 places, 449 transitions, 8757 flow. Second operand 7 states and 147 transitions. [2024-06-21 19:17:23,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 474 transitions, 10167 flow [2024-06-21 19:17:26,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 474 transitions, 9754 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-21 19:17:26,109 INFO L231 Difference]: Finished difference. Result has 385 places, 453 transitions, 8975 flow [2024-06-21 19:17:26,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8344, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8975, PETRI_PLACES=385, PETRI_TRANSITIONS=453} [2024-06-21 19:17:26,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-21 19:17:26,110 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 453 transitions, 8975 flow [2024-06-21 19:17:26,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:26,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:26,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:26,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 19:17:26,111 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)] === [2024-06-21 19:17:26,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:26,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2106451811, now seen corresponding path program 7 times [2024-06-21 19:17:26,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:26,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339579907] [2024-06-21 19:17:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:26,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:26,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:26,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339579907] [2024-06-21 19:17:26,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339579907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:26,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:26,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:17:26,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216034199] [2024-06-21 19:17:26,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:26,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:17:26,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:26,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:17:26,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:17:26,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:17:26,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 453 transitions, 8975 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:26,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:26,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:17:26,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:28,452 INFO L124 PetriNetUnfolderBase]: 4562/7779 cut-off events. [2024-06-21 19:17:28,452 INFO L125 PetriNetUnfolderBase]: For 775086/775092 co-relation queries the response was YES. [2024-06-21 19:17:28,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74871 conditions, 7779 events. 4562/7779 cut-off events. For 775086/775092 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 57843 event pairs, 909 based on Foata normal form. 8/7770 useless extension candidates. Maximal degree in co-relation 74700. Up to 5712 conditions per place. [2024-06-21 19:17:28,576 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 322 selfloop transitions, 159 changer transitions 0/488 dead transitions. [2024-06-21 19:17:28,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 488 transitions, 10772 flow [2024-06-21 19:17:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:17:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:17:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 19:17:28,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 19:17:28,577 INFO L175 Difference]: Start difference. First operand has 385 places, 453 transitions, 8975 flow. Second operand 7 states and 150 transitions. [2024-06-21 19:17:28,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 488 transitions, 10772 flow [2024-06-21 19:17:31,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 488 transitions, 10546 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 19:17:31,899 INFO L231 Difference]: Finished difference. Result has 390 places, 464 transitions, 9513 flow [2024-06-21 19:17:31,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8751, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9513, PETRI_PLACES=390, PETRI_TRANSITIONS=464} [2024-06-21 19:17:31,899 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-21 19:17:31,900 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 464 transitions, 9513 flow [2024-06-21 19:17:31,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:31,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:31,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:31,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 19:17:31,900 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)] === [2024-06-21 19:17:31,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2106452028, now seen corresponding path program 16 times [2024-06-21 19:17:31,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:31,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367725803] [2024-06-21 19:17:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:31,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:32,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:32,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367725803] [2024-06-21 19:17:32,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367725803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:32,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:32,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:17:32,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55043133] [2024-06-21 19:17:32,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:32,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:17:32,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:32,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:17:32,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:17:32,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:17:32,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 464 transitions, 9513 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:32,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:32,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:17:32,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:34,515 INFO L124 PetriNetUnfolderBase]: 4599/7835 cut-off events. [2024-06-21 19:17:34,515 INFO L125 PetriNetUnfolderBase]: For 827650/827656 co-relation queries the response was YES. [2024-06-21 19:17:34,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76594 conditions, 7835 events. 4599/7835 cut-off events. For 827650/827656 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 58374 event pairs, 981 based on Foata normal form. 19/7837 useless extension candidates. Maximal degree in co-relation 76420. Up to 6014 conditions per place. [2024-06-21 19:17:34,627 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 326 selfloop transitions, 157 changer transitions 0/490 dead transitions. [2024-06-21 19:17:34,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 490 transitions, 10906 flow [2024-06-21 19:17:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:17:34,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:17:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 19:17:34,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-21 19:17:34,629 INFO L175 Difference]: Start difference. First operand has 390 places, 464 transitions, 9513 flow. Second operand 8 states and 165 transitions. [2024-06-21 19:17:34,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 490 transitions, 10906 flow [2024-06-21 19:17:37,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 490 transitions, 10772 flow, removed 67 selfloop flow, removed 0 redundant places. [2024-06-21 19:17:37,896 INFO L231 Difference]: Finished difference. Result has 398 places, 465 transitions, 9716 flow [2024-06-21 19:17:37,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9379, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9716, PETRI_PLACES=398, PETRI_TRANSITIONS=465} [2024-06-21 19:17:37,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-21 19:17:37,896 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 465 transitions, 9716 flow [2024-06-21 19:17:37,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:37,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:37,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:37,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 19:17:37,897 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)] === [2024-06-21 19:17:37,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1274200573, now seen corresponding path program 2 times [2024-06-21 19:17:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:37,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377929166] [2024-06-21 19:17:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377929166] [2024-06-21 19:17:38,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377929166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:38,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:38,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:17:38,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432144764] [2024-06-21 19:17:38,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:38,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:17:38,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:17:38,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:17:38,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:17:38,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 465 transitions, 9716 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:38,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:38,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:17:38,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:40,195 INFO L124 PetriNetUnfolderBase]: 4607/7852 cut-off events. [2024-06-21 19:17:40,195 INFO L125 PetriNetUnfolderBase]: For 819990/819996 co-relation queries the response was YES. [2024-06-21 19:17:40,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77381 conditions, 7852 events. 4607/7852 cut-off events. For 819990/819996 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 58777 event pairs, 1463 based on Foata normal form. 8/7846 useless extension candidates. Maximal degree in co-relation 77203. Up to 7026 conditions per place. [2024-06-21 19:17:40,331 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 435 selfloop transitions, 42 changer transitions 0/483 dead transitions. [2024-06-21 19:17:40,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 483 transitions, 10825 flow [2024-06-21 19:17:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:17:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:17:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 19:17:40,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 19:17:40,333 INFO L175 Difference]: Start difference. First operand has 398 places, 465 transitions, 9716 flow. Second operand 7 states and 135 transitions. [2024-06-21 19:17:40,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 483 transitions, 10825 flow [2024-06-21 19:17:43,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 483 transitions, 10505 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 19:17:43,586 INFO L231 Difference]: Finished difference. Result has 399 places, 467 transitions, 9552 flow [2024-06-21 19:17:43,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9396, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9552, PETRI_PLACES=399, PETRI_TRANSITIONS=467} [2024-06-21 19:17:43,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-21 19:17:43,587 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 467 transitions, 9552 flow [2024-06-21 19:17:43,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:43,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:43,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:43,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 19:17:43,587 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)] === [2024-06-21 19:17:43,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:43,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1024604443, now seen corresponding path program 3 times [2024-06-21 19:17:43,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:43,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820662133] [2024-06-21 19:17:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:43,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:44,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:44,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820662133] [2024-06-21 19:17:44,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820662133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:44,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:44,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:17:44,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677312882] [2024-06-21 19:17:44,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:44,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:17:44,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:44,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:17:44,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:17:44,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:17:44,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 467 transitions, 9552 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:44,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:44,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:17:44,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:46,052 INFO L124 PetriNetUnfolderBase]: 4615/7866 cut-off events. [2024-06-21 19:17:46,052 INFO L125 PetriNetUnfolderBase]: For 827734/827740 co-relation queries the response was YES. [2024-06-21 19:17:46,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77100 conditions, 7866 events. 4615/7866 cut-off events. For 827734/827740 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 58949 event pairs, 1437 based on Foata normal form. 8/7860 useless extension candidates. Maximal degree in co-relation 76921. Up to 7071 conditions per place. [2024-06-21 19:17:46,172 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 448 selfloop transitions, 30 changer transitions 0/484 dead transitions. [2024-06-21 19:17:46,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 484 transitions, 10656 flow [2024-06-21 19:17:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:17:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:17:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 19:17:46,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 19:17:46,173 INFO L175 Difference]: Start difference. First operand has 399 places, 467 transitions, 9552 flow. Second operand 8 states and 145 transitions. [2024-06-21 19:17:46,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 484 transitions, 10656 flow [2024-06-21 19:17:49,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 484 transitions, 10542 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 19:17:49,122 INFO L231 Difference]: Finished difference. Result has 402 places, 469 transitions, 9574 flow [2024-06-21 19:17:49,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9438, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9574, PETRI_PLACES=402, PETRI_TRANSITIONS=469} [2024-06-21 19:17:49,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-21 19:17:49,122 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 469 transitions, 9574 flow [2024-06-21 19:17:49,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:49,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:49,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:49,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 19:17:49,123 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)] === [2024-06-21 19:17:49,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash 12828049, now seen corresponding path program 4 times [2024-06-21 19:17:49,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:49,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553352338] [2024-06-21 19:17:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:49,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:49,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:49,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553352338] [2024-06-21 19:17:49,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553352338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:49,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:49,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:17:49,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341221865] [2024-06-21 19:17:49,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:49,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:17:49,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:49,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:17:49,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:17:49,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:17:49,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 469 transitions, 9574 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:49,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:49,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:17:49,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:51,744 INFO L124 PetriNetUnfolderBase]: 4610/7857 cut-off events. [2024-06-21 19:17:51,744 INFO L125 PetriNetUnfolderBase]: For 835130/835136 co-relation queries the response was YES. [2024-06-21 19:17:51,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77022 conditions, 7857 events. 4610/7857 cut-off events. For 835130/835136 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 58872 event pairs, 1427 based on Foata normal form. 8/7851 useless extension candidates. Maximal degree in co-relation 76841. Up to 6917 conditions per place. [2024-06-21 19:17:51,882 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 418 selfloop transitions, 65 changer transitions 0/489 dead transitions. [2024-06-21 19:17:51,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 489 transitions, 10742 flow [2024-06-21 19:17:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 19:17:51,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-21 19:17:51,883 INFO L175 Difference]: Start difference. First operand has 402 places, 469 transitions, 9574 flow. Second operand 10 states and 167 transitions. [2024-06-21 19:17:51,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 489 transitions, 10742 flow [2024-06-21 19:17:55,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 489 transitions, 10608 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 19:17:55,271 INFO L231 Difference]: Finished difference. Result has 405 places, 471 transitions, 9658 flow [2024-06-21 19:17:55,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9440, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9658, PETRI_PLACES=405, PETRI_TRANSITIONS=471} [2024-06-21 19:17:55,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-21 19:17:55,271 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 471 transitions, 9658 flow [2024-06-21 19:17:55,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:55,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:55,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:55,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 19:17:55,272 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)] === [2024-06-21 19:17:55,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1433208357, now seen corresponding path program 11 times [2024-06-21 19:17:55,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:55,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999202783] [2024-06-21 19:17:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:55,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:55,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:55,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999202783] [2024-06-21 19:17:55,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999202783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:55,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:55,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:17:55,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461350438] [2024-06-21 19:17:55,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:55,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:17:55,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:55,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:17:55,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:17:55,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:17:55,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 471 transitions, 9658 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:55,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:55,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:17:55,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:57,510 INFO L124 PetriNetUnfolderBase]: 4630/7900 cut-off events. [2024-06-21 19:17:57,510 INFO L125 PetriNetUnfolderBase]: For 866584/866584 co-relation queries the response was YES. [2024-06-21 19:17:57,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77580 conditions, 7900 events. 4630/7900 cut-off events. For 866584/866584 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 59080 event pairs, 1023 based on Foata normal form. 6/7889 useless extension candidates. Maximal degree in co-relation 77400. Up to 6732 conditions per place. [2024-06-21 19:17:57,637 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 427 selfloop transitions, 56 changer transitions 0/490 dead transitions. [2024-06-21 19:17:57,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 490 transitions, 10792 flow [2024-06-21 19:17:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:17:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:17:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 19:17:57,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-21 19:17:57,638 INFO L175 Difference]: Start difference. First operand has 405 places, 471 transitions, 9658 flow. Second operand 7 states and 142 transitions. [2024-06-21 19:17:57,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 490 transitions, 10792 flow [2024-06-21 19:18:01,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 490 transitions, 10618 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:01,238 INFO L231 Difference]: Finished difference. Result has 403 places, 473 transitions, 9687 flow [2024-06-21 19:18:01,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9484, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9687, PETRI_PLACES=403, PETRI_TRANSITIONS=473} [2024-06-21 19:18:01,239 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-21 19:18:01,239 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 473 transitions, 9687 flow [2024-06-21 19:18:01,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:01,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:01,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:01,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 19:18:01,239 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)] === [2024-06-21 19:18:01,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:01,239 INFO L85 PathProgramCache]: Analyzing trace with hash -222875987, now seen corresponding path program 8 times [2024-06-21 19:18:01,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:01,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107935804] [2024-06-21 19:18:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:01,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:01,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:01,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107935804] [2024-06-21 19:18:01,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107935804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:01,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:01,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:18:01,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196084742] [2024-06-21 19:18:01,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:01,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:18:01,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:18:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:18:01,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:18:01,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 473 transitions, 9687 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:01,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:01,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:18:01,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:03,899 INFO L124 PetriNetUnfolderBase]: 4638/7916 cut-off events. [2024-06-21 19:18:03,900 INFO L125 PetriNetUnfolderBase]: For 840719/840719 co-relation queries the response was YES. [2024-06-21 19:18:03,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77542 conditions, 7916 events. 4638/7916 cut-off events. For 840719/840719 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 59208 event pairs, 998 based on Foata normal form. 2/7901 useless extension candidates. Maximal degree in co-relation 77363. Up to 6273 conditions per place. [2024-06-21 19:18:04,024 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 378 selfloop transitions, 107 changer transitions 0/492 dead transitions. [2024-06-21 19:18:04,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 492 transitions, 10995 flow [2024-06-21 19:18:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:18:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:18:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 19:18:04,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2024-06-21 19:18:04,025 INFO L175 Difference]: Start difference. First operand has 403 places, 473 transitions, 9687 flow. Second operand 7 states and 143 transitions. [2024-06-21 19:18:04,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 492 transitions, 10995 flow [2024-06-21 19:18:07,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 492 transitions, 10822 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 19:18:07,583 INFO L231 Difference]: Finished difference. Result has 405 places, 475 transitions, 9818 flow [2024-06-21 19:18:07,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9514, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9818, PETRI_PLACES=405, PETRI_TRANSITIONS=475} [2024-06-21 19:18:07,583 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-21 19:18:07,583 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 475 transitions, 9818 flow [2024-06-21 19:18:07,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:07,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:07,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:07,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 19:18:07,584 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)] === [2024-06-21 19:18:07,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:07,584 INFO L85 PathProgramCache]: Analyzing trace with hash -233373511, now seen corresponding path program 8 times [2024-06-21 19:18:07,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:07,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875088860] [2024-06-21 19:18:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:07,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:08,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:08,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875088860] [2024-06-21 19:18:08,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875088860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:08,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:08,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:18:08,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516723283] [2024-06-21 19:18:08,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:08,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:18:08,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:08,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:18:08,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:18:08,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:18:08,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 475 transitions, 9818 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:08,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:08,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:18:08,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:10,492 INFO L124 PetriNetUnfolderBase]: 4671/7966 cut-off events. [2024-06-21 19:18:10,492 INFO L125 PetriNetUnfolderBase]: For 886342/886348 co-relation queries the response was YES. [2024-06-21 19:18:10,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78332 conditions, 7966 events. 4671/7966 cut-off events. For 886342/886348 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59910 event pairs, 1542 based on Foata normal form. 15/7967 useless extension candidates. Maximal degree in co-relation 78152. Up to 7149 conditions per place. [2024-06-21 19:18:10,612 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 456 selfloop transitions, 31 changer transitions 0/494 dead transitions. [2024-06-21 19:18:10,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 494 transitions, 10983 flow [2024-06-21 19:18:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:18:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:18:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 19:18:10,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-21 19:18:10,614 INFO L175 Difference]: Start difference. First operand has 405 places, 475 transitions, 9818 flow. Second operand 8 states and 156 transitions. [2024-06-21 19:18:10,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 494 transitions, 10983 flow [2024-06-21 19:18:14,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 494 transitions, 10646 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 19:18:14,175 INFO L231 Difference]: Finished difference. Result has 407 places, 476 transitions, 9588 flow [2024-06-21 19:18:14,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9484, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9588, PETRI_PLACES=407, PETRI_TRANSITIONS=476} [2024-06-21 19:18:14,175 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-21 19:18:14,175 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 476 transitions, 9588 flow [2024-06-21 19:18:14,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:14,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:14,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:14,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 19:18:14,176 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)] === [2024-06-21 19:18:14,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -233373728, now seen corresponding path program 17 times [2024-06-21 19:18:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:14,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714871017] [2024-06-21 19:18:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:14,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:14,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:14,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714871017] [2024-06-21 19:18:14,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714871017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:14,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:14,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:18:14,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450491983] [2024-06-21 19:18:14,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:14,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:18:14,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:18:14,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:18:14,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:18:14,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 476 transitions, 9588 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:14,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:14,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:18:14,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:17,093 INFO L124 PetriNetUnfolderBase]: 4794/8169 cut-off events. [2024-06-21 19:18:17,093 INFO L125 PetriNetUnfolderBase]: For 927282/927282 co-relation queries the response was YES. [2024-06-21 19:18:17,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80979 conditions, 8169 events. 4794/8169 cut-off events. For 927282/927282 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 61374 event pairs, 1063 based on Foata normal form. 3/8155 useless extension candidates. Maximal degree in co-relation 80799. Up to 6442 conditions per place. [2024-06-21 19:18:17,227 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 390 selfloop transitions, 116 changer transitions 0/513 dead transitions. [2024-06-21 19:18:17,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 513 transitions, 11442 flow [2024-06-21 19:18:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:18:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:18:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 19:18:17,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-06-21 19:18:17,229 INFO L175 Difference]: Start difference. First operand has 407 places, 476 transitions, 9588 flow. Second operand 9 states and 182 transitions. [2024-06-21 19:18:17,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 513 transitions, 11442 flow [2024-06-21 19:18:20,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 513 transitions, 11354 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:18:20,870 INFO L231 Difference]: Finished difference. Result has 410 places, 482 transitions, 9906 flow [2024-06-21 19:18:20,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9500, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9906, PETRI_PLACES=410, PETRI_TRANSITIONS=482} [2024-06-21 19:18:20,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-21 19:18:20,871 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 482 transitions, 9906 flow [2024-06-21 19:18:20,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:20,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:20,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:20,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 19:18:20,871 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)] === [2024-06-21 19:18:20,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:20,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1429483335, now seen corresponding path program 9 times [2024-06-21 19:18:20,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:20,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979976271] [2024-06-21 19:18:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:20,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:21,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:21,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979976271] [2024-06-21 19:18:21,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979976271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:21,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:21,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:18:21,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219170718] [2024-06-21 19:18:21,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:21,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:18:21,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:21,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:18:21,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:18:21,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:18:21,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 482 transitions, 9906 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:21,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:21,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:18:21,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:23,820 INFO L124 PetriNetUnfolderBase]: 4827/8227 cut-off events. [2024-06-21 19:18:23,820 INFO L125 PetriNetUnfolderBase]: For 981014/981020 co-relation queries the response was YES. [2024-06-21 19:18:23,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82671 conditions, 8227 events. 4827/8227 cut-off events. For 981014/981020 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 62235 event pairs, 1589 based on Foata normal form. 15/8228 useless extension candidates. Maximal degree in co-relation 82490. Up to 7397 conditions per place. [2024-06-21 19:18:23,956 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 470 selfloop transitions, 23 changer transitions 0/500 dead transitions. [2024-06-21 19:18:23,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 500 transitions, 11076 flow [2024-06-21 19:18:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:18:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:18:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 19:18:23,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-21 19:18:23,958 INFO L175 Difference]: Start difference. First operand has 410 places, 482 transitions, 9906 flow. Second operand 8 states and 155 transitions. [2024-06-21 19:18:23,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 500 transitions, 11076 flow [2024-06-21 19:18:27,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 500 transitions, 10819 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 19:18:27,632 INFO L231 Difference]: Finished difference. Result has 413 places, 483 transitions, 9739 flow [2024-06-21 19:18:27,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9649, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9739, PETRI_PLACES=413, PETRI_TRANSITIONS=483} [2024-06-21 19:18:27,633 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-21 19:18:27,633 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 483 transitions, 9739 flow [2024-06-21 19:18:27,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:27,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:27,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:27,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 19:18:27,634 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)] === [2024-06-21 19:18:27,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1433212077, now seen corresponding path program 12 times [2024-06-21 19:18:27,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:27,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078840550] [2024-06-21 19:18:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:27,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:28,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:28,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078840550] [2024-06-21 19:18:28,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078840550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:28,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:28,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:18:28,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613336088] [2024-06-21 19:18:28,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:28,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:18:28,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:28,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:18:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:18:28,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:18:28,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 483 transitions, 9739 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:28,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:28,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:18:28,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:30,491 INFO L124 PetriNetUnfolderBase]: 4846/8261 cut-off events. [2024-06-21 19:18:30,491 INFO L125 PetriNetUnfolderBase]: For 973403/973403 co-relation queries the response was YES. [2024-06-21 19:18:30,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82502 conditions, 8261 events. 4846/8261 cut-off events. For 973403/973403 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 62385 event pairs, 1043 based on Foata normal form. 6/8250 useless extension candidates. Maximal degree in co-relation 82318. Up to 7049 conditions per place. [2024-06-21 19:18:30,622 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 437 selfloop transitions, 64 changer transitions 0/507 dead transitions. [2024-06-21 19:18:30,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 507 transitions, 10892 flow [2024-06-21 19:18:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:18:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:18:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 19:18:30,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-21 19:18:30,624 INFO L175 Difference]: Start difference. First operand has 413 places, 483 transitions, 9739 flow. Second operand 9 states and 158 transitions. [2024-06-21 19:18:30,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 507 transitions, 10892 flow [2024-06-21 19:18:33,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 507 transitions, 10808 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 19:18:33,644 INFO L231 Difference]: Finished difference. Result has 417 places, 486 transitions, 9891 flow [2024-06-21 19:18:33,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9655, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9891, PETRI_PLACES=417, PETRI_TRANSITIONS=486} [2024-06-21 19:18:33,644 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-21 19:18:33,644 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 486 transitions, 9891 flow [2024-06-21 19:18:33,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:33,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:33,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:33,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 19:18:33,645 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)] === [2024-06-21 19:18:33,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:33,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1419129961, now seen corresponding path program 9 times [2024-06-21 19:18:33,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:33,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671888657] [2024-06-21 19:18:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:33,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:34,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671888657] [2024-06-21 19:18:34,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671888657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:34,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:34,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:18:34,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684465072] [2024-06-21 19:18:34,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:34,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:18:34,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:34,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:18:34,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:18:34,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:18:34,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 486 transitions, 9891 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:34,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:34,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:18:34,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:36,463 INFO L124 PetriNetUnfolderBase]: 4841/8252 cut-off events. [2024-06-21 19:18:36,463 INFO L125 PetriNetUnfolderBase]: For 971365/971365 co-relation queries the response was YES. [2024-06-21 19:18:36,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82758 conditions, 8252 events. 4841/8252 cut-off events. For 971365/971365 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 62155 event pairs, 1116 based on Foata normal form. 2/8237 useless extension candidates. Maximal degree in co-relation 82572. Up to 7064 conditions per place. [2024-06-21 19:18:36,592 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 439 selfloop transitions, 57 changer transitions 0/503 dead transitions. [2024-06-21 19:18:36,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 503 transitions, 10995 flow [2024-06-21 19:18:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:18:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:18:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 19:18:36,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-06-21 19:18:36,593 INFO L175 Difference]: Start difference. First operand has 417 places, 486 transitions, 9891 flow. Second operand 7 states and 141 transitions. [2024-06-21 19:18:36,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 503 transitions, 10995 flow [2024-06-21 19:18:40,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 503 transitions, 10804 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 19:18:40,471 INFO L231 Difference]: Finished difference. Result has 418 places, 488 transitions, 9897 flow [2024-06-21 19:18:40,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9700, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9897, PETRI_PLACES=418, PETRI_TRANSITIONS=488} [2024-06-21 19:18:40,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2024-06-21 19:18:40,471 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 488 transitions, 9897 flow [2024-06-21 19:18:40,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:40,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:40,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:40,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 19:18:40,472 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)] === [2024-06-21 19:18:40,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1422705098, now seen corresponding path program 18 times [2024-06-21 19:18:40,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:40,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183720329] [2024-06-21 19:18:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:40,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:40,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183720329] [2024-06-21 19:18:40,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183720329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:40,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:40,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:18:40,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943241842] [2024-06-21 19:18:40,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:40,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:18:40,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:40,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:18:40,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:18:41,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:18:41,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 488 transitions, 9897 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:41,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:41,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:18:41,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:43,353 INFO L124 PetriNetUnfolderBase]: 4886/8329 cut-off events. [2024-06-21 19:18:43,353 INFO L125 PetriNetUnfolderBase]: For 1034896/1034896 co-relation queries the response was YES. [2024-06-21 19:18:43,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83602 conditions, 8329 events. 4886/8329 cut-off events. For 1034896/1034896 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 62907 event pairs, 1119 based on Foata normal form. 13/8325 useless extension candidates. Maximal degree in co-relation 83416. Up to 7030 conditions per place. [2024-06-21 19:18:43,492 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 446 selfloop transitions, 57 changer transitions 0/510 dead transitions. [2024-06-21 19:18:43,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 510 transitions, 11117 flow [2024-06-21 19:18:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:18:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:18:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 19:18:43,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 19:18:43,493 INFO L175 Difference]: Start difference. First operand has 418 places, 488 transitions, 9897 flow. Second operand 8 states and 160 transitions. [2024-06-21 19:18:43,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 510 transitions, 11117 flow [2024-06-21 19:18:47,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 510 transitions, 10932 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 19:18:47,646 INFO L231 Difference]: Finished difference. Result has 421 places, 489 transitions, 9862 flow [2024-06-21 19:18:47,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9712, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9862, PETRI_PLACES=421, PETRI_TRANSITIONS=489} [2024-06-21 19:18:47,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 380 predicate places. [2024-06-21 19:18:47,647 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 489 transitions, 9862 flow [2024-06-21 19:18:47,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:47,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:47,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 19:18:47,648 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)] === [2024-06-21 19:18:47,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:47,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1429625625, now seen corresponding path program 10 times [2024-06-21 19:18:47,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:47,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467934798] [2024-06-21 19:18:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:47,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:47,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467934798] [2024-06-21 19:18:47,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467934798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:47,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:47,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:18:47,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528833893] [2024-06-21 19:18:47,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:18:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:18:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:18:47,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:18:47,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 489 transitions, 9862 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:47,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:47,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:18:47,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:50,136 INFO L124 PetriNetUnfolderBase]: 4881/8322 cut-off events. [2024-06-21 19:18:50,137 INFO L125 PetriNetUnfolderBase]: For 1000384/1000384 co-relation queries the response was YES. [2024-06-21 19:18:50,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83466 conditions, 8322 events. 4881/8322 cut-off events. For 1000384/1000384 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 62828 event pairs, 1116 based on Foata normal form. 2/8307 useless extension candidates. Maximal degree in co-relation 83279. Up to 7126 conditions per place. [2024-06-21 19:18:50,270 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 440 selfloop transitions, 59 changer transitions 0/506 dead transitions. [2024-06-21 19:18:50,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 506 transitions, 10948 flow [2024-06-21 19:18:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:18:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:18:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 19:18:50,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 19:18:50,271 INFO L175 Difference]: Start difference. First operand has 421 places, 489 transitions, 9862 flow. Second operand 7 states and 140 transitions. [2024-06-21 19:18:50,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 506 transitions, 10948 flow [2024-06-21 19:18:53,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 506 transitions, 10816 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:18:53,818 INFO L231 Difference]: Finished difference. Result has 422 places, 491 transitions, 9907 flow [2024-06-21 19:18:53,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9732, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9907, PETRI_PLACES=422, PETRI_TRANSITIONS=491} [2024-06-21 19:18:53,818 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-21 19:18:53,818 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 491 transitions, 9907 flow [2024-06-21 19:18:53,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:53,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:53,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:53,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 19:18:53,819 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)] === [2024-06-21 19:18:53,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:53,819 INFO L85 PathProgramCache]: Analyzing trace with hash -222876204, now seen corresponding path program 19 times [2024-06-21 19:18:53,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:53,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113012334] [2024-06-21 19:18:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:53,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:54,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:54,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113012334] [2024-06-21 19:18:54,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113012334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:54,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:54,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:18:54,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452170205] [2024-06-21 19:18:54,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:54,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:18:54,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:54,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:18:54,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:18:54,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:18:54,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 491 transitions, 9907 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:54,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:54,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:18:54,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:56,516 INFO L124 PetriNetUnfolderBase]: 4905/8377 cut-off events. [2024-06-21 19:18:56,516 INFO L125 PetriNetUnfolderBase]: For 1057454/1057454 co-relation queries the response was YES. [2024-06-21 19:18:56,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83260 conditions, 8377 events. 4905/8377 cut-off events. For 1057454/1057454 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 63602 event pairs, 1084 based on Foata normal form. 19/8379 useless extension candidates. Maximal degree in co-relation 83072. Up to 6716 conditions per place. [2024-06-21 19:18:56,652 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 401 selfloop transitions, 110 changer transitions 0/518 dead transitions. [2024-06-21 19:18:56,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 518 transitions, 11427 flow [2024-06-21 19:18:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:18:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:18:56,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 19:18:56,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-21 19:18:56,653 INFO L175 Difference]: Start difference. First operand has 422 places, 491 transitions, 9907 flow. Second operand 8 states and 162 transitions. [2024-06-21 19:18:56,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 518 transitions, 11427 flow [2024-06-21 19:19:00,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 518 transitions, 11257 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 19:19:00,578 INFO L231 Difference]: Finished difference. Result has 426 places, 492 transitions, 9987 flow [2024-06-21 19:19:00,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9737, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9987, PETRI_PLACES=426, PETRI_TRANSITIONS=492} [2024-06-21 19:19:00,579 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-21 19:19:00,579 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 492 transitions, 9987 flow [2024-06-21 19:19:00,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:00,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:00,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:00,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 19:19:00,579 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)] === [2024-06-21 19:19:00,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:00,580 INFO L85 PathProgramCache]: Analyzing trace with hash -225754951, now seen corresponding path program 10 times [2024-06-21 19:19:00,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:00,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187121650] [2024-06-21 19:19:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:00,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat