./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi007_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/rfi007_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi007_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/rfi007_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:41:39,869 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:41:39,926 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:41:39,930 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:41:39,931 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:41:39,959 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:41:39,960 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:41:39,960 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:41:39,961 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:41:39,964 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:41:39,964 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:41:39,964 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:41:39,965 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:41:39,966 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:41:39,966 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:41:39,966 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:41:39,967 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:41:39,967 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:41:39,967 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:41:39,967 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:41:39,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:41:39,968 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:41:39,968 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:41:39,968 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:41:39,968 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:41:39,968 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:41:39,969 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:41:39,969 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:41:39,969 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:41:39,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:41:39,970 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:41:39,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:41:39,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:41:39,971 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:41:39,971 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:41:39,971 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:41:39,971 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:41:39,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:41:39,972 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:41:39,972 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:41:39,972 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:41:39,972 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:41:39,973 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:41:39,973 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:41:40,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:41:40,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:41:40,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:41:40,202 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:41:40,202 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:41:40,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi007_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 18:41:41,205 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:41:41,381 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:41:41,382 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi007_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 18:41:41,399 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ec3da749/b88e6700b0d04bc6b366ae4d0dbfe8c9/FLAG7e8f3af79 [2024-06-27 18:41:41,410 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ec3da749/b88e6700b0d04bc6b366ae4d0dbfe8c9 [2024-06-27 18:41:41,412 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:41:41,413 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:41:41,413 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi007_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 18:41:41,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:41:41,511 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:41:41,512 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:41:41,512 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:41:41,516 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:41:41,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:41:41" (1/2) ... [2024-06-27 18:41:41,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@750cc6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:41, skipping insertion in model container [2024-06-27 18:41:41,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:41:41" (1/2) ... [2024-06-27 18:41:41,518 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36007267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:41, skipping insertion in model container [2024-06-27 18:41:41,519 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:41:41" (2/2) ... [2024-06-27 18:41:41,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@750cc6d2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:41, skipping insertion in model container [2024-06-27 18:41:41,519 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:41:41" (2/2) ... [2024-06-27 18:41:41,519 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:41:41,596 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:41:41,597 INFO L97 edCorrectnessWitness]: Location invariant before [L813-L813] ((((((((((((((! multithreaded || x$read_delayed_var == 0) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1)) [2024-06-27 18:41:41,597 INFO L97 edCorrectnessWitness]: Location invariant before [L814-L814] ((((((((((((((! multithreaded || x$read_delayed_var == 0) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1)) [2024-06-27 18:41:41,597 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:41:41,597 INFO L106 edCorrectnessWitness]: ghost_update [L811-L811] multithreaded = 1; [2024-06-27 18:41:41,637 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:41:41,799 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi007_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i[995,1008] [2024-06-27 18:41:41,938 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:41:41,952 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:41:41,988 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi007_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i[995,1008] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:41:42,035 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:41:42,070 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:41:42,071 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42 WrapperNode [2024-06-27 18:41:42,072 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:41:42,074 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:41:42,074 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:41:42,074 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:41:42,080 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 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,109 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 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,142 INFO L138 Inliner]: procedures = 174, calls = 35, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 109 [2024-06-27 18:41:42,142 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:41:42,143 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:41:42,143 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:41:42,144 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:41:42,152 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,167 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,179 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]. [2024-06-27 18:41:42,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,189 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,193 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:41:42,194 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:41:42,194 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:41:42,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:41:42,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (1/1) ... [2024-06-27 18:41:42,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:41:42,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:41:42,234 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) [2024-06-27 18:41:42,235 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 [2024-06-27 18:41:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:41:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:41:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:41:42,273 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:41:42,273 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:41:42,273 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:41:42,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:41:42,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:41:42,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:41:42,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:41:42,274 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:41:42,369 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:41:42,371 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:41:42,612 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:41:42,612 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:41:42,756 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:41:42,756 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:41:42,757 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:41:42 BoogieIcfgContainer [2024-06-27 18:41:42,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:41:42,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:41:42,758 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:41:42,761 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:41:42,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:41:41" (1/4) ... [2024-06-27 18:41:42,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204cf6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:41:42, skipping insertion in model container [2024-06-27 18:41:42,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:41:41" (2/4) ... [2024-06-27 18:41:42,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204cf6ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:41:42, skipping insertion in model container [2024-06-27 18:41:42,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:42" (3/4) ... [2024-06-27 18:41:42,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204cf6ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:41:42, skipping insertion in model container [2024-06-27 18:41:42,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:41:42" (4/4) ... [2024-06-27 18:41:42,763 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi007_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 18:41:42,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:41:42,776 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:41:42,776 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:41:42,802 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:41:42,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 80 flow [2024-06-27 18:41:42,846 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2024-06-27 18:41:42,846 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:41:42,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 34 events. 1/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-06-27 18:41:42,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 80 flow [2024-06-27 18:41:42,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 34 transitions, 74 flow [2024-06-27 18:41:42,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:41:42,867 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;@7055bf53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:41:42,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:41:42,871 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:41:42,872 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:41:42,872 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:41:42,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:42,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:41:42,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:42,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:42,913 INFO L85 PathProgramCache]: Analyzing trace with hash 308678707, now seen corresponding path program 1 times [2024-06-27 18:41:42,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:42,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892717295] [2024-06-27 18:41:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:42,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:43,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:43,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892717295] [2024-06-27 18:41:43,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892717295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:43,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:43,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:41:43,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893963950] [2024-06-27 18:41:43,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:43,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:41:43,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:43,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:41:43,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:41:43,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-06-27 18:41:43,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:43,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:43,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-06-27 18:41:43,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:43,961 INFO L124 PetriNetUnfolderBase]: 475/841 cut-off events. [2024-06-27 18:41:43,961 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 18:41:43,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 841 events. 475/841 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4213 event pairs, 182 based on Foata normal form. 43/824 useless extension candidates. Maximal degree in co-relation 1646. Up to 787 conditions per place. [2024-06-27 18:41:43,970 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 30 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 18:41:43,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 165 flow [2024-06-27 18:41:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:41:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:41:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-27 18:41:43,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 18:41:43,983 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 74 flow. Second operand 3 states and 74 transitions. [2024-06-27 18:41:43,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 165 flow [2024-06-27 18:41:43,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:41:43,987 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 98 flow [2024-06-27 18:41:43,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-06-27 18:41:43,991 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2024-06-27 18:41:43,991 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 98 flow [2024-06-27 18:41:43,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:43,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:43,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:41:43,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:41:43,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:43,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:43,994 INFO L85 PathProgramCache]: Analyzing trace with hash 308678893, now seen corresponding path program 1 times [2024-06-27 18:41:43,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:43,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030926444] [2024-06-27 18:41:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:43,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:44,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030926444] [2024-06-27 18:41:44,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030926444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:44,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:44,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:41:44,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795767658] [2024-06-27 18:41:44,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:44,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:41:44,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:41:44,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:41:44,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2024-06-27 18:41:44,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:44,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:44,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2024-06-27 18:41:44,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:44,140 INFO L124 PetriNetUnfolderBase]: 152/358 cut-off events. [2024-06-27 18:41:44,141 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-27 18:41:44,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 358 events. 152/358 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1853 event pairs, 52 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 690. Up to 227 conditions per place. [2024-06-27 18:41:44,143 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 23 selfloop transitions, 3 changer transitions 2/45 dead transitions. [2024-06-27 18:41:44,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 169 flow [2024-06-27 18:41:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:41:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:41:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-27 18:41:44,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7592592592592593 [2024-06-27 18:41:44,144 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 98 flow. Second operand 3 states and 82 transitions. [2024-06-27 18:41:44,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 169 flow [2024-06-27 18:41:44,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:41:44,146 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 90 flow [2024-06-27 18:41:44,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-06-27 18:41:44,147 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2024-06-27 18:41:44,147 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 90 flow [2024-06-27 18:41:44,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:44,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:44,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:44,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:41:44,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:44,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:44,149 INFO L85 PathProgramCache]: Analyzing trace with hash 287676551, now seen corresponding path program 1 times [2024-06-27 18:41:44,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:44,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229080356] [2024-06-27 18:41:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:44,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:44,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:44,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229080356] [2024-06-27 18:41:44,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229080356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:44,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:44,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:41:44,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569816189] [2024-06-27 18:41:44,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:44,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:41:44,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:44,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:41:44,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:41:44,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-06-27 18:41:44,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:44,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:44,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-06-27 18:41:44,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:44,602 INFO L124 PetriNetUnfolderBase]: 342/705 cut-off events. [2024-06-27 18:41:44,603 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-06-27 18:41:44,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 705 events. 342/705 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3706 event pairs, 160 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 1443. Up to 562 conditions per place. [2024-06-27 18:41:44,606 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 34 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-27 18:41:44,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 216 flow [2024-06-27 18:41:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:41:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:41:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-27 18:41:44,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 18:41:44,607 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 90 flow. Second operand 4 states and 88 transitions. [2024-06-27 18:41:44,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 216 flow [2024-06-27 18:41:44,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:41:44,609 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 133 flow [2024-06-27 18:41:44,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-06-27 18:41:44,609 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2024-06-27 18:41:44,610 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 133 flow [2024-06-27 18:41:44,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:44,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:44,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:44,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:41:44,610 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:44,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:44,610 INFO L85 PathProgramCache]: Analyzing trace with hash 328039780, now seen corresponding path program 1 times [2024-06-27 18:41:44,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:44,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917824884] [2024-06-27 18:41:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:44,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:44,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:44,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917824884] [2024-06-27 18:41:44,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917824884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:44,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:44,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:41:44,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542923195] [2024-06-27 18:41:44,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:44,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:41:44,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:44,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:41:44,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:41:44,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 36 [2024-06-27 18:41:44,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:44,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:44,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 36 [2024-06-27 18:41:44,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:45,152 INFO L124 PetriNetUnfolderBase]: 418/828 cut-off events. [2024-06-27 18:41:45,153 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2024-06-27 18:41:45,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1877 conditions, 828 events. 418/828 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4413 event pairs, 148 based on Foata normal form. 3/794 useless extension candidates. Maximal degree in co-relation 1862. Up to 629 conditions per place. [2024-06-27 18:41:45,157 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 46 selfloop transitions, 13 changer transitions 0/68 dead transitions. [2024-06-27 18:41:45,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 339 flow [2024-06-27 18:41:45,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:41:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:41:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-27 18:41:45,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 18:41:45,159 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 133 flow. Second operand 5 states and 111 transitions. [2024-06-27 18:41:45,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 68 transitions, 339 flow [2024-06-27 18:41:45,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 332 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 18:41:45,161 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 214 flow [2024-06-27 18:41:45,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-06-27 18:41:45,162 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 9 predicate places. [2024-06-27 18:41:45,162 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 214 flow [2024-06-27 18:41:45,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:45,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:45,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:45,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:41:45,163 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:45,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:45,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1440771760, now seen corresponding path program 1 times [2024-06-27 18:41:45,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:45,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53175782] [2024-06-27 18:41:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:45,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:45,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:45,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53175782] [2024-06-27 18:41:45,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53175782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:45,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:45,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:41:45,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442877752] [2024-06-27 18:41:45,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:45,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:41:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:41:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:41:45,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 36 [2024-06-27 18:41:45,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 214 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) [2024-06-27 18:41:45,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:45,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 36 [2024-06-27 18:41:45,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:45,823 INFO L124 PetriNetUnfolderBase]: 428/841 cut-off events. [2024-06-27 18:41:45,823 INFO L125 PetriNetUnfolderBase]: For 820/820 co-relation queries the response was YES. [2024-06-27 18:41:45,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2268 conditions, 841 events. 428/841 cut-off events. For 820/820 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4457 event pairs, 110 based on Foata normal form. 3/808 useless extension candidates. Maximal degree in co-relation 2249. Up to 620 conditions per place. [2024-06-27 18:41:45,828 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 53 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-27 18:41:45,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 454 flow [2024-06-27 18:41:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:41:45,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:41:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-27 18:41:45,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 18:41:45,830 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 214 flow. Second operand 6 states and 132 transitions. [2024-06-27 18:41:45,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 454 flow [2024-06-27 18:41:45,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 78 transitions, 450 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 18:41:45,833 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 270 flow [2024-06-27 18:41:45,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-27 18:41:45,834 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2024-06-27 18:41:45,835 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 270 flow [2024-06-27 18:41:45,835 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) [2024-06-27 18:41:45,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:45,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:45,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:41:45,835 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:45,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:45,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1714252953, now seen corresponding path program 1 times [2024-06-27 18:41:45,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:45,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736633377] [2024-06-27 18:41:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:45,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:46,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:46,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736633377] [2024-06-27 18:41:46,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736633377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:46,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:46,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:41:46,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96326140] [2024-06-27 18:41:46,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:46,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:41:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:41:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:41:46,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 36 [2024-06-27 18:41:46,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 270 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-27 18:41:46,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:46,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 36 [2024-06-27 18:41:46,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:46,751 INFO L124 PetriNetUnfolderBase]: 444/794 cut-off events. [2024-06-27 18:41:46,751 INFO L125 PetriNetUnfolderBase]: For 1156/1156 co-relation queries the response was YES. [2024-06-27 18:41:46,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2501 conditions, 794 events. 444/794 cut-off events. For 1156/1156 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3979 event pairs, 37 based on Foata normal form. 6/789 useless extension candidates. Maximal degree in co-relation 2479. Up to 565 conditions per place. [2024-06-27 18:41:46,756 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 59 selfloop transitions, 28 changer transitions 0/96 dead transitions. [2024-06-27 18:41:46,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 96 transitions, 626 flow [2024-06-27 18:41:46,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:41:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:41:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-27 18:41:46,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-27 18:41:46,759 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 270 flow. Second operand 7 states and 149 transitions. [2024-06-27 18:41:46,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 96 transitions, 626 flow [2024-06-27 18:41:46,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 96 transitions, 590 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:41:46,765 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 410 flow [2024-06-27 18:41:46,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=410, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2024-06-27 18:41:46,768 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-06-27 18:41:46,768 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 410 flow [2024-06-27 18:41:46,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-27 18:41:46,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:46,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:46,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:41:46,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:46,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:46,770 INFO L85 PathProgramCache]: Analyzing trace with hash 896135998, now seen corresponding path program 1 times [2024-06-27 18:41:46,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:46,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727470744] [2024-06-27 18:41:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:46,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:47,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:47,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727470744] [2024-06-27 18:41:47,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727470744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:47,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:47,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:41:47,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247569828] [2024-06-27 18:41:47,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:47,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:41:47,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:47,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:41:47,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:41:47,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:47,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 410 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:47,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:47,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:47,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:47,445 INFO L124 PetriNetUnfolderBase]: 520/1035 cut-off events. [2024-06-27 18:41:47,446 INFO L125 PetriNetUnfolderBase]: For 1994/1994 co-relation queries the response was YES. [2024-06-27 18:41:47,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3346 conditions, 1035 events. 520/1035 cut-off events. For 1994/1994 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5639 event pairs, 157 based on Foata normal form. 1/994 useless extension candidates. Maximal degree in co-relation 3319. Up to 848 conditions per place. [2024-06-27 18:41:47,452 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 56 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-06-27 18:41:47,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 566 flow [2024-06-27 18:41:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:41:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:41:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-27 18:41:47,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-27 18:41:47,454 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 410 flow. Second operand 5 states and 86 transitions. [2024-06-27 18:41:47,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 566 flow [2024-06-27 18:41:47,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 73 transitions, 530 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-27 18:41:47,460 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 402 flow [2024-06-27 18:41:47,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-27 18:41:47,461 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 25 predicate places. [2024-06-27 18:41:47,461 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 402 flow [2024-06-27 18:41:47,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:47,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:47,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:47,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:41:47,462 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:47,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:47,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1997468519, now seen corresponding path program 1 times [2024-06-27 18:41:47,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:47,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753320280] [2024-06-27 18:41:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:47,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:47,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:47,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753320280] [2024-06-27 18:41:47,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753320280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:47,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:47,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:41:47,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401714467] [2024-06-27 18:41:47,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:41:47,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:41:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:41:47,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:47,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 402 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 18:41:47,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:47,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:47,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:48,223 INFO L124 PetriNetUnfolderBase]: 514/986 cut-off events. [2024-06-27 18:41:48,224 INFO L125 PetriNetUnfolderBase]: For 1908/1908 co-relation queries the response was YES. [2024-06-27 18:41:48,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3154 conditions, 986 events. 514/986 cut-off events. For 1908/1908 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5247 event pairs, 152 based on Foata normal form. 3/957 useless extension candidates. Maximal degree in co-relation 3123. Up to 806 conditions per place. [2024-06-27 18:41:48,230 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 63 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-27 18:41:48,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 604 flow [2024-06-27 18:41:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:41:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:41:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 18:41:48,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 18:41:48,232 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 402 flow. Second operand 6 states and 104 transitions. [2024-06-27 18:41:48,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 604 flow [2024-06-27 18:41:48,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 579 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 18:41:48,235 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 421 flow [2024-06-27 18:41:48,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=421, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-27 18:41:48,236 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 27 predicate places. [2024-06-27 18:41:48,236 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 421 flow [2024-06-27 18:41:48,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 18:41:48,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:48,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:48,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:41:48,237 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:48,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:48,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1785337626, now seen corresponding path program 1 times [2024-06-27 18:41:48,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:48,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186909732] [2024-06-27 18:41:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:48,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:48,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:48,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186909732] [2024-06-27 18:41:48,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186909732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:48,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:48,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:41:48,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170546287] [2024-06-27 18:41:48,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:48,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:41:48,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:48,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:41:48,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:41:48,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:48,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 421 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 18:41:48,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:48,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:48,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:48,898 INFO L124 PetriNetUnfolderBase]: 523/994 cut-off events. [2024-06-27 18:41:48,899 INFO L125 PetriNetUnfolderBase]: For 2056/2056 co-relation queries the response was YES. [2024-06-27 18:41:48,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3346 conditions, 994 events. 523/994 cut-off events. For 2056/2056 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5227 event pairs, 118 based on Foata normal form. 2/960 useless extension candidates. Maximal degree in co-relation 3315. Up to 777 conditions per place. [2024-06-27 18:41:48,905 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 64 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2024-06-27 18:41:48,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 664 flow [2024-06-27 18:41:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:41:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:41:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 18:41:48,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-27 18:41:48,906 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 421 flow. Second operand 6 states and 109 transitions. [2024-06-27 18:41:48,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 664 flow [2024-06-27 18:41:48,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 640 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 18:41:48,911 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 455 flow [2024-06-27 18:41:48,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-27 18:41:48,911 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 29 predicate places. [2024-06-27 18:41:48,911 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 455 flow [2024-06-27 18:41:48,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 18:41:48,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:48,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:48,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:41:48,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:48,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2101708420, now seen corresponding path program 2 times [2024-06-27 18:41:48,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:48,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866495718] [2024-06-27 18:41:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:48,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:49,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:49,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866495718] [2024-06-27 18:41:49,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866495718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:49,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:49,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:41:49,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782338992] [2024-06-27 18:41:49,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:49,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:41:49,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:49,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:41:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:41:49,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:49,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 455 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 18:41:49,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:49,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:49,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:49,556 INFO L124 PetriNetUnfolderBase]: 518/1011 cut-off events. [2024-06-27 18:41:49,556 INFO L125 PetriNetUnfolderBase]: For 2269/2269 co-relation queries the response was YES. [2024-06-27 18:41:49,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3380 conditions, 1011 events. 518/1011 cut-off events. For 2269/2269 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5449 event pairs, 157 based on Foata normal form. 1/975 useless extension candidates. Maximal degree in co-relation 3348. Up to 840 conditions per place. [2024-06-27 18:41:49,563 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 63 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-27 18:41:49,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 80 transitions, 635 flow [2024-06-27 18:41:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:41:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:41:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 18:41:49,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 18:41:49,565 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 455 flow. Second operand 6 states and 100 transitions. [2024-06-27 18:41:49,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 80 transitions, 635 flow [2024-06-27 18:41:49,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 80 transitions, 608 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 18:41:49,571 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 453 flow [2024-06-27 18:41:49,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2024-06-27 18:41:49,572 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-06-27 18:41:49,573 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 453 flow [2024-06-27 18:41:49,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 18:41:49,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:49,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:49,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:41:49,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:49,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:49,574 INFO L85 PathProgramCache]: Analyzing trace with hash 869655237, now seen corresponding path program 1 times [2024-06-27 18:41:49,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:49,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515493687] [2024-06-27 18:41:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:49,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:50,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:50,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515493687] [2024-06-27 18:41:50,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515493687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:50,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:50,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:41:50,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376078832] [2024-06-27 18:41:50,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:50,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:41:50,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:41:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:41:50,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:50,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 453 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:50,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:50,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:50,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:50,367 INFO L124 PetriNetUnfolderBase]: 642/1182 cut-off events. [2024-06-27 18:41:50,367 INFO L125 PetriNetUnfolderBase]: For 2958/2958 co-relation queries the response was YES. [2024-06-27 18:41:50,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3936 conditions, 1182 events. 642/1182 cut-off events. For 2958/2958 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6357 event pairs, 147 based on Foata normal form. 6/1153 useless extension candidates. Maximal degree in co-relation 3903. Up to 769 conditions per place. [2024-06-27 18:41:50,374 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 77 selfloop transitions, 20 changer transitions 0/104 dead transitions. [2024-06-27 18:41:50,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 104 transitions, 781 flow [2024-06-27 18:41:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:41:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:41:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 18:41:50,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 18:41:50,376 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 453 flow. Second operand 7 states and 132 transitions. [2024-06-27 18:41:50,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 104 transitions, 781 flow [2024-06-27 18:41:50,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 739 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 18:41:50,382 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 513 flow [2024-06-27 18:41:50,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=513, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-27 18:41:50,383 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 34 predicate places. [2024-06-27 18:41:50,383 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 513 flow [2024-06-27 18:41:50,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:50,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:50,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:50,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:41:50,384 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:50,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:50,384 INFO L85 PathProgramCache]: Analyzing trace with hash -722194443, now seen corresponding path program 2 times [2024-06-27 18:41:50,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:50,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177974696] [2024-06-27 18:41:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:50,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:50,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177974696] [2024-06-27 18:41:50,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177974696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:50,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:50,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:41:50,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386515993] [2024-06-27 18:41:50,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:50,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:41:50,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:50,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:41:50,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:41:50,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:50,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 513 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:50,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:50,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:50,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:51,099 INFO L124 PetriNetUnfolderBase]: 675/1286 cut-off events. [2024-06-27 18:41:51,100 INFO L125 PetriNetUnfolderBase]: For 3689/3689 co-relation queries the response was YES. [2024-06-27 18:41:51,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4598 conditions, 1286 events. 675/1286 cut-off events. For 3689/3689 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7190 event pairs, 189 based on Foata normal form. 3/1244 useless extension candidates. Maximal degree in co-relation 4564. Up to 1007 conditions per place. [2024-06-27 18:41:51,108 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 79 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-06-27 18:41:51,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 102 transitions, 817 flow [2024-06-27 18:41:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:41:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:41:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 18:41:51,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 18:41:51,109 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 513 flow. Second operand 7 states and 123 transitions. [2024-06-27 18:41:51,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 102 transitions, 817 flow [2024-06-27 18:41:51,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 102 transitions, 802 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 18:41:51,115 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 567 flow [2024-06-27 18:41:51,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=567, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-06-27 18:41:51,116 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 39 predicate places. [2024-06-27 18:41:51,116 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 567 flow [2024-06-27 18:41:51,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:51,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:51,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:51,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:41:51,117 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:51,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:51,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1262182197, now seen corresponding path program 3 times [2024-06-27 18:41:51,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:51,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644587887] [2024-06-27 18:41:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:51,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:51,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:51,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644587887] [2024-06-27 18:41:51,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644587887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:51,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:51,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:41:51,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938376661] [2024-06-27 18:41:51,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:51,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:41:51,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:51,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:41:51,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:41:51,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:51,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 567 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:51,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:51,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:51,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:51,907 INFO L124 PetriNetUnfolderBase]: 669/1289 cut-off events. [2024-06-27 18:41:51,907 INFO L125 PetriNetUnfolderBase]: For 4124/4124 co-relation queries the response was YES. [2024-06-27 18:41:51,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4653 conditions, 1289 events. 669/1289 cut-off events. For 4124/4124 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7284 event pairs, 205 based on Foata normal form. 3/1244 useless extension candidates. Maximal degree in co-relation 4616. Up to 1045 conditions per place. [2024-06-27 18:41:51,915 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 77 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2024-06-27 18:41:51,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 97 transitions, 795 flow [2024-06-27 18:41:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:41:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:41:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 18:41:51,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 18:41:51,916 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 567 flow. Second operand 7 states and 117 transitions. [2024-06-27 18:41:51,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 97 transitions, 795 flow [2024-06-27 18:41:51,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 97 transitions, 765 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 18:41:51,923 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 568 flow [2024-06-27 18:41:51,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=568, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2024-06-27 18:41:51,924 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-06-27 18:41:51,924 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 568 flow [2024-06-27 18:41:51,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:51,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:51,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:51,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:41:51,925 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:51,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:51,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1185694397, now seen corresponding path program 1 times [2024-06-27 18:41:51,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:51,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42956508] [2024-06-27 18:41:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:51,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:52,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:52,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42956508] [2024-06-27 18:41:52,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42956508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:52,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:52,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:41:52,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76291165] [2024-06-27 18:41:52,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:52,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:41:52,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:52,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:41:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:41:52,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:52,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 568 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 18:41:52,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:52,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:52,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:52,888 INFO L124 PetriNetUnfolderBase]: 670/1239 cut-off events. [2024-06-27 18:41:52,889 INFO L125 PetriNetUnfolderBase]: For 3983/3983 co-relation queries the response was YES. [2024-06-27 18:41:52,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4604 conditions, 1239 events. 670/1239 cut-off events. For 3983/3983 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6805 event pairs, 155 based on Foata normal form. 1/1200 useless extension candidates. Maximal degree in co-relation 4566. Up to 960 conditions per place. [2024-06-27 18:41:52,896 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 85 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-27 18:41:52,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 884 flow [2024-06-27 18:41:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:41:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:41:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 18:41:52,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:41:52,898 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 568 flow. Second operand 8 states and 144 transitions. [2024-06-27 18:41:52,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 884 flow [2024-06-27 18:41:52,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 847 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 18:41:52,906 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 593 flow [2024-06-27 18:41:52,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=593, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2024-06-27 18:41:52,906 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 45 predicate places. [2024-06-27 18:41:52,906 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 593 flow [2024-06-27 18:41:52,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 18:41:52,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:52,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:52,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:41:52,907 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:52,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash 384801110, now seen corresponding path program 1 times [2024-06-27 18:41:52,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:52,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554715337] [2024-06-27 18:41:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:52,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:53,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:53,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554715337] [2024-06-27 18:41:53,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554715337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:53,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:53,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:41:53,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791759999] [2024-06-27 18:41:53,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:53,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:41:53,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:41:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:41:53,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:53,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 593 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:53,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:53,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:53,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:53,797 INFO L124 PetriNetUnfolderBase]: 703/1275 cut-off events. [2024-06-27 18:41:53,798 INFO L125 PetriNetUnfolderBase]: For 4640/4640 co-relation queries the response was YES. [2024-06-27 18:41:53,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4894 conditions, 1275 events. 703/1275 cut-off events. For 4640/4640 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6918 event pairs, 151 based on Foata normal form. 3/1244 useless extension candidates. Maximal degree in co-relation 4855. Up to 800 conditions per place. [2024-06-27 18:41:53,812 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 87 selfloop transitions, 24 changer transitions 0/118 dead transitions. [2024-06-27 18:41:53,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 961 flow [2024-06-27 18:41:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:41:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:41:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 18:41:53,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:41:53,814 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 593 flow. Second operand 8 states and 150 transitions. [2024-06-27 18:41:53,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 961 flow [2024-06-27 18:41:53,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 118 transitions, 917 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:41:53,824 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 616 flow [2024-06-27 18:41:53,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=616, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2024-06-27 18:41:53,825 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2024-06-27 18:41:53,826 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 616 flow [2024-06-27 18:41:53,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:53,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:53,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:53,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:41:53,826 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:53,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:53,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2017534580, now seen corresponding path program 2 times [2024-06-27 18:41:53,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:53,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195868771] [2024-06-27 18:41:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:53,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:54,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:54,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195868771] [2024-06-27 18:41:54,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195868771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:54,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:54,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:41:54,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134008382] [2024-06-27 18:41:54,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:54,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:41:54,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:54,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:41:54,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:41:54,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:54,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 616 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 18:41:54,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:54,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:54,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:54,626 INFO L124 PetriNetUnfolderBase]: 736/1349 cut-off events. [2024-06-27 18:41:54,626 INFO L125 PetriNetUnfolderBase]: For 5415/5415 co-relation queries the response was YES. [2024-06-27 18:41:54,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5221 conditions, 1349 events. 736/1349 cut-off events. For 5415/5415 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7510 event pairs, 151 based on Foata normal form. 3/1311 useless extension candidates. Maximal degree in co-relation 5181. Up to 824 conditions per place. [2024-06-27 18:41:54,635 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 82 selfloop transitions, 29 changer transitions 0/118 dead transitions. [2024-06-27 18:41:54,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 118 transitions, 982 flow [2024-06-27 18:41:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:41:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:41:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 18:41:54,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-06-27 18:41:54,636 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 616 flow. Second operand 7 states and 137 transitions. [2024-06-27 18:41:54,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 118 transitions, 982 flow [2024-06-27 18:41:54,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 118 transitions, 924 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 18:41:54,647 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 639 flow [2024-06-27 18:41:54,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=639, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2024-06-27 18:41:54,647 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2024-06-27 18:41:54,648 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 639 flow [2024-06-27 18:41:54,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 18:41:54,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:54,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:54,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:41:54,648 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:54,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash -913190412, now seen corresponding path program 3 times [2024-06-27 18:41:54,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:54,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985963348] [2024-06-27 18:41:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:55,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:55,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985963348] [2024-06-27 18:41:55,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985963348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:55,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:55,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:41:55,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618241099] [2024-06-27 18:41:55,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:55,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:41:55,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:41:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:41:55,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:55,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 639 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:55,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:55,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:55,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:55,553 INFO L124 PetriNetUnfolderBase]: 769/1432 cut-off events. [2024-06-27 18:41:55,553 INFO L125 PetriNetUnfolderBase]: For 6118/6118 co-relation queries the response was YES. [2024-06-27 18:41:55,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5512 conditions, 1432 events. 769/1432 cut-off events. For 6118/6118 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8189 event pairs, 209 based on Foata normal form. 3/1390 useless extension candidates. Maximal degree in co-relation 5471. Up to 1113 conditions per place. [2024-06-27 18:41:55,562 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 91 selfloop transitions, 18 changer transitions 0/116 dead transitions. [2024-06-27 18:41:55,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 116 transitions, 961 flow [2024-06-27 18:41:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:41:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:41:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 18:41:55,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-27 18:41:55,563 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 639 flow. Second operand 8 states and 140 transitions. [2024-06-27 18:41:55,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 116 transitions, 961 flow [2024-06-27 18:41:55,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 116 transitions, 907 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 18:41:55,575 INFO L231 Difference]: Finished difference. Result has 92 places, 86 transitions, 648 flow [2024-06-27 18:41:55,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=648, PETRI_PLACES=92, PETRI_TRANSITIONS=86} [2024-06-27 18:41:55,575 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 52 predicate places. [2024-06-27 18:41:55,575 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 86 transitions, 648 flow [2024-06-27 18:41:55,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:55,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:55,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:55,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:41:55,576 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:55,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1097100504, now seen corresponding path program 4 times [2024-06-27 18:41:55,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:55,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704834724] [2024-06-27 18:41:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:55,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:56,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:56,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704834724] [2024-06-27 18:41:56,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704834724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:56,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:56,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:41:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317672960] [2024-06-27 18:41:56,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:56,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:41:56,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:56,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:41:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:41:56,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:56,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 86 transitions, 648 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:56,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:56,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:56,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:56,401 INFO L124 PetriNetUnfolderBase]: 763/1444 cut-off events. [2024-06-27 18:41:56,401 INFO L125 PetriNetUnfolderBase]: For 6111/6111 co-relation queries the response was YES. [2024-06-27 18:41:56,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5413 conditions, 1444 events. 763/1444 cut-off events. For 6111/6111 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8403 event pairs, 227 based on Foata normal form. 3/1396 useless extension candidates. Maximal degree in co-relation 5371. Up to 1146 conditions per place. [2024-06-27 18:41:56,410 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 90 selfloop transitions, 15 changer transitions 0/112 dead transitions. [2024-06-27 18:41:56,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 112 transitions, 928 flow [2024-06-27 18:41:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:41:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:41:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 18:41:56,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 18:41:56,412 INFO L175 Difference]: Start difference. First operand has 92 places, 86 transitions, 648 flow. Second operand 8 states and 135 transitions. [2024-06-27 18:41:56,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 112 transitions, 928 flow [2024-06-27 18:41:56,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 112 transitions, 889 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 18:41:56,423 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 644 flow [2024-06-27 18:41:56,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2024-06-27 18:41:56,423 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-27 18:41:56,424 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 644 flow [2024-06-27 18:41:56,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:56,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:56,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:56,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:41:56,424 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:56,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1096804547, now seen corresponding path program 1 times [2024-06-27 18:41:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:56,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775273424] [2024-06-27 18:41:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:56,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:56,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:56,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775273424] [2024-06-27 18:41:56,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775273424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:56,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:56,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:41:56,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717333745] [2024-06-27 18:41:56,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:41:56,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:41:56,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:41:56,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:56,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 644 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:56,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:56,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:56,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:57,359 INFO L124 PetriNetUnfolderBase]: 765/1423 cut-off events. [2024-06-27 18:41:57,360 INFO L125 PetriNetUnfolderBase]: For 6184/6184 co-relation queries the response was YES. [2024-06-27 18:41:57,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5380 conditions, 1423 events. 765/1423 cut-off events. For 6184/6184 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8102 event pairs, 219 based on Foata normal form. 2/1381 useless extension candidates. Maximal degree in co-relation 5337. Up to 1188 conditions per place. [2024-06-27 18:41:57,368 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 90 selfloop transitions, 16 changer transitions 0/113 dead transitions. [2024-06-27 18:41:57,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 113 transitions, 944 flow [2024-06-27 18:41:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:41:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:41:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 18:41:57,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 18:41:57,369 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 644 flow. Second operand 8 states and 132 transitions. [2024-06-27 18:41:57,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 113 transitions, 944 flow [2024-06-27 18:41:57,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 113 transitions, 881 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 18:41:57,383 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 668 flow [2024-06-27 18:41:57,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=668, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2024-06-27 18:41:57,383 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2024-06-27 18:41:57,384 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 668 flow [2024-06-27 18:41:57,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:57,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:57,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:57,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:41:57,385 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:57,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:57,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1096793666, now seen corresponding path program 1 times [2024-06-27 18:41:57,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:57,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476258677] [2024-06-27 18:41:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:57,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:58,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:58,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476258677] [2024-06-27 18:41:58,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476258677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:58,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:58,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:41:58,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603226352] [2024-06-27 18:41:58,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:58,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:41:58,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:41:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:41:58,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:58,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 668 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:58,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:58,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:58,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:58,763 INFO L124 PetriNetUnfolderBase]: 762/1426 cut-off events. [2024-06-27 18:41:58,763 INFO L125 PetriNetUnfolderBase]: For 6216/6216 co-relation queries the response was YES. [2024-06-27 18:41:58,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5379 conditions, 1426 events. 762/1426 cut-off events. For 6216/6216 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8207 event pairs, 215 based on Foata normal form. 2/1381 useless extension candidates. Maximal degree in co-relation 5334. Up to 1167 conditions per place. [2024-06-27 18:41:58,773 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 93 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2024-06-27 18:41:58,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 968 flow [2024-06-27 18:41:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:41:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:41:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 18:41:58,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2024-06-27 18:41:58,775 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 668 flow. Second operand 8 states and 134 transitions. [2024-06-27 18:41:58,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 968 flow [2024-06-27 18:41:58,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 119 transitions, 921 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 18:41:58,789 INFO L231 Difference]: Finished difference. Result has 99 places, 93 transitions, 686 flow [2024-06-27 18:41:58,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=686, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2024-06-27 18:41:58,789 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-06-27 18:41:58,789 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 686 flow [2024-06-27 18:41:58,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:58,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:58,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:58,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:41:58,790 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:58,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1999089492, now seen corresponding path program 1 times [2024-06-27 18:41:58,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:58,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504698686] [2024-06-27 18:41:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:59,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:59,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504698686] [2024-06-27 18:41:59,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504698686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:59,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:59,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:41:59,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619212148] [2024-06-27 18:41:59,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:59,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:41:59,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:59,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:41:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:41:59,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:41:59,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 686 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:59,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:59,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:41:59,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:59,780 INFO L124 PetriNetUnfolderBase]: 790/1472 cut-off events. [2024-06-27 18:41:59,780 INFO L125 PetriNetUnfolderBase]: For 6923/6923 co-relation queries the response was YES. [2024-06-27 18:41:59,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 1472 events. 790/1472 cut-off events. For 6923/6923 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8502 event pairs, 143 based on Foata normal form. 2/1423 useless extension candidates. Maximal degree in co-relation 5561. Up to 1046 conditions per place. [2024-06-27 18:41:59,789 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 105 selfloop transitions, 20 changer transitions 0/132 dead transitions. [2024-06-27 18:41:59,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 132 transitions, 1108 flow [2024-06-27 18:41:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:41:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:41:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 18:41:59,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034722222222222 [2024-06-27 18:41:59,791 INFO L175 Difference]: Start difference. First operand has 99 places, 93 transitions, 686 flow. Second operand 8 states and 145 transitions. [2024-06-27 18:41:59,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 132 transitions, 1108 flow [2024-06-27 18:41:59,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 132 transitions, 1056 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:41:59,806 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 715 flow [2024-06-27 18:41:59,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=715, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2024-06-27 18:41:59,806 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 62 predicate places. [2024-06-27 18:41:59,807 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 715 flow [2024-06-27 18:41:59,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:59,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:59,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:59,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:41:59,807 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:59,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:59,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1999028918, now seen corresponding path program 1 times [2024-06-27 18:41:59,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:59,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62022718] [2024-06-27 18:41:59,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:59,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:00,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:00,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62022718] [2024-06-27 18:42:00,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62022718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:00,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:00,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:00,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781973500] [2024-06-27 18:42:00,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:00,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:00,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:00,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:00,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:00,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:00,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 715 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:00,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:00,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:00,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:00,757 INFO L124 PetriNetUnfolderBase]: 815/1438 cut-off events. [2024-06-27 18:42:00,757 INFO L125 PetriNetUnfolderBase]: For 7224/7224 co-relation queries the response was YES. [2024-06-27 18:42:00,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5796 conditions, 1438 events. 815/1438 cut-off events. For 7224/7224 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8004 event pairs, 108 based on Foata normal form. 1/1413 useless extension candidates. Maximal degree in co-relation 5748. Up to 978 conditions per place. [2024-06-27 18:42:00,765 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 107 selfloop transitions, 37 changer transitions 0/151 dead transitions. [2024-06-27 18:42:00,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1287 flow [2024-06-27 18:42:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:00,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 18:42:00,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-27 18:42:00,766 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 715 flow. Second operand 9 states and 161 transitions. [2024-06-27 18:42:00,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1287 flow [2024-06-27 18:42:00,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 151 transitions, 1258 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 18:42:00,784 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 905 flow [2024-06-27 18:42:00,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=905, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-06-27 18:42:00,785 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2024-06-27 18:42:00,785 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 905 flow [2024-06-27 18:42:00,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:00,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:00,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:00,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:42:00,787 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:00,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:00,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1898178454, now seen corresponding path program 2 times [2024-06-27 18:42:00,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:00,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907152217] [2024-06-27 18:42:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:00,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907152217] [2024-06-27 18:42:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907152217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:01,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:01,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:01,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962010475] [2024-06-27 18:42:01,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:01,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:01,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:01,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 905 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:01,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:01,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:01,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:01,744 INFO L124 PetriNetUnfolderBase]: 835/1466 cut-off events. [2024-06-27 18:42:01,744 INFO L125 PetriNetUnfolderBase]: For 8569/8569 co-relation queries the response was YES. [2024-06-27 18:42:01,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6406 conditions, 1466 events. 835/1466 cut-off events. For 8569/8569 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8098 event pairs, 139 based on Foata normal form. 2/1444 useless extension candidates. Maximal degree in co-relation 6354. Up to 1162 conditions per place. [2024-06-27 18:42:01,753 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 110 selfloop transitions, 33 changer transitions 0/150 dead transitions. [2024-06-27 18:42:01,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 150 transitions, 1342 flow [2024-06-27 18:42:01,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:42:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:42:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 18:42:01,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:42:01,755 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 905 flow. Second operand 8 states and 144 transitions. [2024-06-27 18:42:01,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 150 transitions, 1342 flow [2024-06-27 18:42:01,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 1296 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 18:42:01,775 INFO L231 Difference]: Finished difference. Result has 115 places, 116 transitions, 996 flow [2024-06-27 18:42:01,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=996, PETRI_PLACES=115, PETRI_TRANSITIONS=116} [2024-06-27 18:42:01,776 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-06-27 18:42:01,776 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 116 transitions, 996 flow [2024-06-27 18:42:01,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:01,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:01,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:01,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:42:01,777 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:01,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1996227758, now seen corresponding path program 2 times [2024-06-27 18:42:01,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:01,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214778363] [2024-06-27 18:42:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:02,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:02,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214778363] [2024-06-27 18:42:02,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214778363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:02,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:02,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:02,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334583209] [2024-06-27 18:42:02,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:02,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:02,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:02,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:02,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:02,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 116 transitions, 996 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:02,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:02,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:02,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:02,750 INFO L124 PetriNetUnfolderBase]: 855/1490 cut-off events. [2024-06-27 18:42:02,750 INFO L125 PetriNetUnfolderBase]: For 9051/9051 co-relation queries the response was YES. [2024-06-27 18:42:02,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6681 conditions, 1490 events. 855/1490 cut-off events. For 9051/9051 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8259 event pairs, 100 based on Foata normal form. 1/1469 useless extension candidates. Maximal degree in co-relation 6627. Up to 1153 conditions per place. [2024-06-27 18:42:02,758 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 115 selfloop transitions, 35 changer transitions 0/157 dead transitions. [2024-06-27 18:42:02,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 157 transitions, 1488 flow [2024-06-27 18:42:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:42:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:42:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 18:42:02,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:42:02,760 INFO L175 Difference]: Start difference. First operand has 115 places, 116 transitions, 996 flow. Second operand 8 states and 144 transitions. [2024-06-27 18:42:02,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 157 transitions, 1488 flow [2024-06-27 18:42:02,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 157 transitions, 1429 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 18:42:02,781 INFO L231 Difference]: Finished difference. Result has 120 places, 124 transitions, 1112 flow [2024-06-27 18:42:02,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1112, PETRI_PLACES=120, PETRI_TRANSITIONS=124} [2024-06-27 18:42:02,782 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 80 predicate places. [2024-06-27 18:42:02,782 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 124 transitions, 1112 flow [2024-06-27 18:42:02,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:02,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:02,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:02,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:42:02,782 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:02,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1895381820, now seen corresponding path program 3 times [2024-06-27 18:42:02,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:02,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740530076] [2024-06-27 18:42:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:02,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:03,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740530076] [2024-06-27 18:42:03,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740530076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:03,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:03,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:03,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484555856] [2024-06-27 18:42:03,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:03,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:03,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:03,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:03,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:03,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:03,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 124 transitions, 1112 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:03,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:03,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:03,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:03,792 INFO L124 PetriNetUnfolderBase]: 866/1507 cut-off events. [2024-06-27 18:42:03,792 INFO L125 PetriNetUnfolderBase]: For 9738/9738 co-relation queries the response was YES. [2024-06-27 18:42:03,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7009 conditions, 1507 events. 866/1507 cut-off events. For 9738/9738 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8371 event pairs, 100 based on Foata normal form. 1/1486 useless extension candidates. Maximal degree in co-relation 6952. Up to 1143 conditions per place. [2024-06-27 18:42:03,802 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 110 selfloop transitions, 42 changer transitions 0/159 dead transitions. [2024-06-27 18:42:03,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 159 transitions, 1560 flow [2024-06-27 18:42:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 18:42:03,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2024-06-27 18:42:03,806 INFO L175 Difference]: Start difference. First operand has 120 places, 124 transitions, 1112 flow. Second operand 9 states and 158 transitions. [2024-06-27 18:42:03,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 159 transitions, 1560 flow [2024-06-27 18:42:03,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 159 transitions, 1496 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 18:42:03,833 INFO L231 Difference]: Finished difference. Result has 125 places, 126 transitions, 1162 flow [2024-06-27 18:42:03,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1162, PETRI_PLACES=125, PETRI_TRANSITIONS=126} [2024-06-27 18:42:03,834 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 85 predicate places. [2024-06-27 18:42:03,834 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 126 transitions, 1162 flow [2024-06-27 18:42:03,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:03,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:03,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:03,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:42:03,835 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:03,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1895381944, now seen corresponding path program 3 times [2024-06-27 18:42:03,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:03,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873192764] [2024-06-27 18:42:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:03,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:04,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:04,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873192764] [2024-06-27 18:42:04,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873192764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:04,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:04,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:04,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253575222] [2024-06-27 18:42:04,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:04,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:04,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:04,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:04,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:04,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:04,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 126 transitions, 1162 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:04,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:04,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:04,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:04,847 INFO L124 PetriNetUnfolderBase]: 867/1510 cut-off events. [2024-06-27 18:42:04,847 INFO L125 PetriNetUnfolderBase]: For 10016/10016 co-relation queries the response was YES. [2024-06-27 18:42:04,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7066 conditions, 1510 events. 867/1510 cut-off events. For 10016/10016 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8363 event pairs, 124 based on Foata normal form. 2/1489 useless extension candidates. Maximal degree in co-relation 7008. Up to 1259 conditions per place. [2024-06-27 18:42:04,856 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 121 selfloop transitions, 30 changer transitions 0/158 dead transitions. [2024-06-27 18:42:04,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 158 transitions, 1574 flow [2024-06-27 18:42:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:42:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:42:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 18:42:04,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-06-27 18:42:04,857 INFO L175 Difference]: Start difference. First operand has 125 places, 126 transitions, 1162 flow. Second operand 8 states and 141 transitions. [2024-06-27 18:42:04,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 158 transitions, 1574 flow [2024-06-27 18:42:04,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 158 transitions, 1474 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 18:42:04,880 INFO L231 Difference]: Finished difference. Result has 126 places, 127 transitions, 1142 flow [2024-06-27 18:42:04,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=126, PETRI_TRANSITIONS=127} [2024-06-27 18:42:04,880 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 86 predicate places. [2024-06-27 18:42:04,880 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 127 transitions, 1142 flow [2024-06-27 18:42:04,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:04,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:04,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:04,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:42:04,881 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:04,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:04,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1880941238, now seen corresponding path program 4 times [2024-06-27 18:42:04,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:04,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105453759] [2024-06-27 18:42:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:04,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:05,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:05,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105453759] [2024-06-27 18:42:05,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105453759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:05,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:05,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:05,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154802966] [2024-06-27 18:42:05,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:05,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:05,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:05,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:05,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:05,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:05,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 127 transitions, 1142 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:05,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:05,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:05,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:05,982 INFO L124 PetriNetUnfolderBase]: 929/1689 cut-off events. [2024-06-27 18:42:05,982 INFO L125 PetriNetUnfolderBase]: For 11633/11633 co-relation queries the response was YES. [2024-06-27 18:42:05,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7493 conditions, 1689 events. 929/1689 cut-off events. For 11633/11633 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9918 event pairs, 162 based on Foata normal form. 3/1643 useless extension candidates. Maximal degree in co-relation 7435. Up to 966 conditions per place. [2024-06-27 18:42:05,993 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 130 selfloop transitions, 48 changer transitions 0/185 dead transitions. [2024-06-27 18:42:05,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 1797 flow [2024-06-27 18:42:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 18:42:05,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5493827160493827 [2024-06-27 18:42:05,994 INFO L175 Difference]: Start difference. First operand has 126 places, 127 transitions, 1142 flow. Second operand 9 states and 178 transitions. [2024-06-27 18:42:05,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 1797 flow [2024-06-27 18:42:06,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 185 transitions, 1727 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:06,026 INFO L231 Difference]: Finished difference. Result has 129 places, 135 transitions, 1265 flow [2024-06-27 18:42:06,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1265, PETRI_PLACES=129, PETRI_TRANSITIONS=135} [2024-06-27 18:42:06,027 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 89 predicate places. [2024-06-27 18:42:06,027 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 135 transitions, 1265 flow [2024-06-27 18:42:06,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:06,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:06,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:06,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:42:06,028 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:06,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:06,028 INFO L85 PathProgramCache]: Analyzing trace with hash -189178972, now seen corresponding path program 5 times [2024-06-27 18:42:06,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:06,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938354687] [2024-06-27 18:42:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:06,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:06,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:06,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938354687] [2024-06-27 18:42:06,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938354687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:06,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:06,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:06,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068348620] [2024-06-27 18:42:06,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:06,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:06,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:06,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:06,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:06,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:06,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 135 transitions, 1265 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:06,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:06,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:06,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:07,170 INFO L124 PetriNetUnfolderBase]: 962/1748 cut-off events. [2024-06-27 18:42:07,170 INFO L125 PetriNetUnfolderBase]: For 13298/13298 co-relation queries the response was YES. [2024-06-27 18:42:07,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8055 conditions, 1748 events. 962/1748 cut-off events. For 13298/13298 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10302 event pairs, 201 based on Foata normal form. 3/1700 useless extension candidates. Maximal degree in co-relation 7996. Up to 1130 conditions per place. [2024-06-27 18:42:07,181 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 135 selfloop transitions, 38 changer transitions 0/180 dead transitions. [2024-06-27 18:42:07,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 180 transitions, 1801 flow [2024-06-27 18:42:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 18:42:07,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154320987654321 [2024-06-27 18:42:07,182 INFO L175 Difference]: Start difference. First operand has 129 places, 135 transitions, 1265 flow. Second operand 9 states and 167 transitions. [2024-06-27 18:42:07,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 180 transitions, 1801 flow [2024-06-27 18:42:07,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 180 transitions, 1723 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:42:07,216 INFO L231 Difference]: Finished difference. Result has 133 places, 139 transitions, 1327 flow [2024-06-27 18:42:07,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1327, PETRI_PLACES=133, PETRI_TRANSITIONS=139} [2024-06-27 18:42:07,216 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-27 18:42:07,217 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 139 transitions, 1327 flow [2024-06-27 18:42:07,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:07,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:07,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:07,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:42:07,217 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:07,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:07,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1755869172, now seen corresponding path program 6 times [2024-06-27 18:42:07,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:07,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369330220] [2024-06-27 18:42:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:07,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:07,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:07,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369330220] [2024-06-27 18:42:07,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369330220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:07,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:07,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:07,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140452144] [2024-06-27 18:42:07,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:07,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:07,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:07,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:07,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:07,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:07,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 139 transitions, 1327 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:07,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:07,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:07,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:08,460 INFO L124 PetriNetUnfolderBase]: 995/1816 cut-off events. [2024-06-27 18:42:08,460 INFO L125 PetriNetUnfolderBase]: For 14202/14202 co-relation queries the response was YES. [2024-06-27 18:42:08,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8504 conditions, 1816 events. 995/1816 cut-off events. For 14202/14202 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10908 event pairs, 253 based on Foata normal form. 3/1769 useless extension candidates. Maximal degree in co-relation 8443. Up to 1441 conditions per place. [2024-06-27 18:42:08,471 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 149 selfloop transitions, 23 changer transitions 0/179 dead transitions. [2024-06-27 18:42:08,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 179 transitions, 1846 flow [2024-06-27 18:42:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 18:42:08,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2024-06-27 18:42:08,479 INFO L175 Difference]: Start difference. First operand has 133 places, 139 transitions, 1327 flow. Second operand 9 states and 158 transitions. [2024-06-27 18:42:08,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 179 transitions, 1846 flow [2024-06-27 18:42:08,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 179 transitions, 1754 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 18:42:08,518 INFO L231 Difference]: Finished difference. Result has 135 places, 143 transitions, 1351 flow [2024-06-27 18:42:08,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1351, PETRI_PLACES=135, PETRI_TRANSITIONS=143} [2024-06-27 18:42:08,519 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 95 predicate places. [2024-06-27 18:42:08,519 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 143 transitions, 1351 flow [2024-06-27 18:42:08,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:08,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:08,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:08,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:42:08,520 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:08,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash 349623616, now seen corresponding path program 7 times [2024-06-27 18:42:08,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:08,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23607730] [2024-06-27 18:42:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:08,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:09,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23607730] [2024-06-27 18:42:09,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23607730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:09,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:09,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:09,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520347298] [2024-06-27 18:42:09,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:09,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:09,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:09,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:09,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:09,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 143 transitions, 1351 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:09,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:09,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:09,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:09,646 INFO L124 PetriNetUnfolderBase]: 989/1835 cut-off events. [2024-06-27 18:42:09,646 INFO L125 PetriNetUnfolderBase]: For 13471/13471 co-relation queries the response was YES. [2024-06-27 18:42:09,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8307 conditions, 1835 events. 989/1835 cut-off events. For 13471/13471 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11175 event pairs, 272 based on Foata normal form. 3/1781 useless extension candidates. Maximal degree in co-relation 8245. Up to 1474 conditions per place. [2024-06-27 18:42:09,657 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 148 selfloop transitions, 20 changer transitions 0/175 dead transitions. [2024-06-27 18:42:09,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 175 transitions, 1787 flow [2024-06-27 18:42:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:09,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 18:42:09,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 18:42:09,658 INFO L175 Difference]: Start difference. First operand has 135 places, 143 transitions, 1351 flow. Second operand 9 states and 153 transitions. [2024-06-27 18:42:09,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 175 transitions, 1787 flow [2024-06-27 18:42:09,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 175 transitions, 1701 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 18:42:09,701 INFO L231 Difference]: Finished difference. Result has 137 places, 143 transitions, 1313 flow [2024-06-27 18:42:09,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1313, PETRI_PLACES=137, PETRI_TRANSITIONS=143} [2024-06-27 18:42:09,702 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 97 predicate places. [2024-06-27 18:42:09,702 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 143 transitions, 1313 flow [2024-06-27 18:42:09,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:09,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:09,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:09,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:42:09,703 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:09,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:09,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1477102128, now seen corresponding path program 1 times [2024-06-27 18:42:09,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:09,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273355368] [2024-06-27 18:42:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:09,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:10,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:10,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273355368] [2024-06-27 18:42:10,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273355368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:10,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:10,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:10,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563830494] [2024-06-27 18:42:10,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:10,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:10,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:10,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:10,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:10,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 143 transitions, 1313 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:10,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:10,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:10,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:10,772 INFO L124 PetriNetUnfolderBase]: 997/1832 cut-off events. [2024-06-27 18:42:10,773 INFO L125 PetriNetUnfolderBase]: For 12542/12542 co-relation queries the response was YES. [2024-06-27 18:42:10,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8177 conditions, 1832 events. 997/1832 cut-off events. For 12542/12542 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11048 event pairs, 270 based on Foata normal form. 2/1781 useless extension candidates. Maximal degree in co-relation 8114. Up to 1507 conditions per place. [2024-06-27 18:42:10,783 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 148 selfloop transitions, 24 changer transitions 0/179 dead transitions. [2024-06-27 18:42:10,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 179 transitions, 1781 flow [2024-06-27 18:42:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:10,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 18:42:10,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 18:42:10,797 INFO L175 Difference]: Start difference. First operand has 137 places, 143 transitions, 1313 flow. Second operand 9 states and 153 transitions. [2024-06-27 18:42:10,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 179 transitions, 1781 flow [2024-06-27 18:42:10,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 179 transitions, 1703 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 18:42:10,836 INFO L231 Difference]: Finished difference. Result has 139 places, 147 transitions, 1343 flow [2024-06-27 18:42:10,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1343, PETRI_PLACES=139, PETRI_TRANSITIONS=147} [2024-06-27 18:42:10,836 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 99 predicate places. [2024-06-27 18:42:10,837 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 147 transitions, 1343 flow [2024-06-27 18:42:10,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:10,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:10,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:10,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:42:10,837 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:10,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1900519642, now seen corresponding path program 1 times [2024-06-27 18:42:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:10,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347083135] [2024-06-27 18:42:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:10,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:10,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347083135] [2024-06-27 18:42:10,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347083135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:10,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:42:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099824909] [2024-06-27 18:42:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:10,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:42:10,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:42:10,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:42:10,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-06-27 18:42:10,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 147 transitions, 1343 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:10,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:10,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-06-27 18:42:10,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:11,062 INFO L124 PetriNetUnfolderBase]: 405/864 cut-off events. [2024-06-27 18:42:11,062 INFO L125 PetriNetUnfolderBase]: For 5578/5605 co-relation queries the response was YES. [2024-06-27 18:42:11,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 864 events. 405/864 cut-off events. For 5578/5605 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4879 event pairs, 109 based on Foata normal form. 73/870 useless extension candidates. Maximal degree in co-relation 3390. Up to 250 conditions per place. [2024-06-27 18:42:11,068 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 57 selfloop transitions, 32 changer transitions 0/123 dead transitions. [2024-06-27 18:42:11,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 123 transitions, 1196 flow [2024-06-27 18:42:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:42:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:42:11,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-27 18:42:11,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 18:42:11,070 INFO L175 Difference]: Start difference. First operand has 139 places, 147 transitions, 1343 flow. Second operand 4 states and 99 transitions. [2024-06-27 18:42:11,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 123 transitions, 1196 flow [2024-06-27 18:42:11,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 123 transitions, 1011 flow, removed 22 selfloop flow, removed 27 redundant places. [2024-06-27 18:42:11,087 INFO L231 Difference]: Finished difference. Result has 116 places, 110 transitions, 909 flow [2024-06-27 18:42:11,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=909, PETRI_PLACES=116, PETRI_TRANSITIONS=110} [2024-06-27 18:42:11,088 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 76 predicate places. [2024-06-27 18:42:11,088 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 110 transitions, 909 flow [2024-06-27 18:42:11,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:11,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:11,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:11,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:42:11,089 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:11,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1675736745, now seen corresponding path program 1 times [2024-06-27 18:42:11,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:11,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250834371] [2024-06-27 18:42:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:11,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:11,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:11,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250834371] [2024-06-27 18:42:11,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250834371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:11,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:11,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:11,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855772205] [2024-06-27 18:42:11,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:11,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:11,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:11,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:11,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:11,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:11,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 110 transitions, 909 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:11,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:11,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:11,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:12,219 INFO L124 PetriNetUnfolderBase]: 1070/2037 cut-off events. [2024-06-27 18:42:12,220 INFO L125 PetriNetUnfolderBase]: For 20681/20681 co-relation queries the response was YES. [2024-06-27 18:42:12,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8801 conditions, 2037 events. 1070/2037 cut-off events. For 20681/20681 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12198 event pairs, 225 based on Foata normal form. 2/1913 useless extension candidates. Maximal degree in co-relation 8745. Up to 898 conditions per place. [2024-06-27 18:42:12,231 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 139 selfloop transitions, 86 changer transitions 0/233 dead transitions. [2024-06-27 18:42:12,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 233 transitions, 2290 flow [2024-06-27 18:42:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:42:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:42:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-27 18:42:12,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51010101010101 [2024-06-27 18:42:12,232 INFO L175 Difference]: Start difference. First operand has 116 places, 110 transitions, 909 flow. Second operand 11 states and 202 transitions. [2024-06-27 18:42:12,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 233 transitions, 2290 flow [2024-06-27 18:42:12,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 233 transitions, 2276 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 18:42:12,277 INFO L231 Difference]: Finished difference. Result has 132 places, 166 transitions, 1768 flow [2024-06-27 18:42:12,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1768, PETRI_PLACES=132, PETRI_TRANSITIONS=166} [2024-06-27 18:42:12,277 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 92 predicate places. [2024-06-27 18:42:12,277 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 166 transitions, 1768 flow [2024-06-27 18:42:12,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:12,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:12,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:12,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:42:12,278 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:12,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1842231081, now seen corresponding path program 2 times [2024-06-27 18:42:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:12,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499780985] [2024-06-27 18:42:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:12,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:12,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:12,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499780985] [2024-06-27 18:42:12,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499780985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:12,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:12,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267075602] [2024-06-27 18:42:12,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:12,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:12,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:13,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:13,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 166 transitions, 1768 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:13,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:13,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:13,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:13,534 INFO L124 PetriNetUnfolderBase]: 1228/2341 cut-off events. [2024-06-27 18:42:13,534 INFO L125 PetriNetUnfolderBase]: For 31981/31981 co-relation queries the response was YES. [2024-06-27 18:42:13,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11542 conditions, 2341 events. 1228/2341 cut-off events. For 31981/31981 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14493 event pairs, 217 based on Foata normal form. 2/2205 useless extension candidates. Maximal degree in co-relation 11477. Up to 1002 conditions per place. [2024-06-27 18:42:13,550 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 96 selfloop transitions, 106 changer transitions 0/210 dead transitions. [2024-06-27 18:42:13,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 210 transitions, 2510 flow [2024-06-27 18:42:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 18:42:13,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-27 18:42:13,552 INFO L175 Difference]: Start difference. First operand has 132 places, 166 transitions, 1768 flow. Second operand 9 states and 165 transitions. [2024-06-27 18:42:13,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 210 transitions, 2510 flow [2024-06-27 18:42:13,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 210 transitions, 2497 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 18:42:13,622 INFO L231 Difference]: Finished difference. Result has 140 places, 169 transitions, 2097 flow [2024-06-27 18:42:13,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2097, PETRI_PLACES=140, PETRI_TRANSITIONS=169} [2024-06-27 18:42:13,622 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 100 predicate places. [2024-06-27 18:42:13,622 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 169 transitions, 2097 flow [2024-06-27 18:42:13,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:13,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:13,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:13,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:42:13,623 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:13,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:13,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1286014817, now seen corresponding path program 3 times [2024-06-27 18:42:13,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:13,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860897829] [2024-06-27 18:42:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:13,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:14,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:14,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860897829] [2024-06-27 18:42:14,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860897829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:14,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:14,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:14,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638163345] [2024-06-27 18:42:14,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:14,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:14,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:14,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:14,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:14,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:14,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 169 transitions, 2097 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:14,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:14,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:14,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:14,886 INFO L124 PetriNetUnfolderBase]: 1455/2965 cut-off events. [2024-06-27 18:42:14,887 INFO L125 PetriNetUnfolderBase]: For 50870/50870 co-relation queries the response was YES. [2024-06-27 18:42:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13938 conditions, 2965 events. 1455/2965 cut-off events. For 50870/50870 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20440 event pairs, 442 based on Foata normal form. 36/2814 useless extension candidates. Maximal degree in co-relation 13870. Up to 1542 conditions per place. [2024-06-27 18:42:14,904 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 94 selfloop transitions, 110 changer transitions 0/212 dead transitions. [2024-06-27 18:42:14,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 212 transitions, 2706 flow [2024-06-27 18:42:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:42:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:42:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-27 18:42:14,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-27 18:42:14,906 INFO L175 Difference]: Start difference. First operand has 140 places, 169 transitions, 2097 flow. Second operand 11 states and 191 transitions. [2024-06-27 18:42:14,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 212 transitions, 2706 flow [2024-06-27 18:42:15,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 212 transitions, 2610 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:15,003 INFO L231 Difference]: Finished difference. Result has 146 places, 172 transitions, 2301 flow [2024-06-27 18:42:15,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2301, PETRI_PLACES=146, PETRI_TRANSITIONS=172} [2024-06-27 18:42:15,003 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 106 predicate places. [2024-06-27 18:42:15,003 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 172 transitions, 2301 flow [2024-06-27 18:42:15,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:15,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:15,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:15,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:42:15,004 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:15,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1286014972, now seen corresponding path program 1 times [2024-06-27 18:42:15,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:15,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588143847] [2024-06-27 18:42:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:15,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:15,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:15,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588143847] [2024-06-27 18:42:15,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588143847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:15,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:15,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:15,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396320995] [2024-06-27 18:42:15,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:15,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:15,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:15,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:15,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 172 transitions, 2301 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:15,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:15,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:15,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:16,588 INFO L124 PetriNetUnfolderBase]: 1485/2975 cut-off events. [2024-06-27 18:42:16,588 INFO L125 PetriNetUnfolderBase]: For 37617/37617 co-relation queries the response was YES. [2024-06-27 18:42:16,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14796 conditions, 2975 events. 1485/2975 cut-off events. For 37617/37617 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20400 event pairs, 465 based on Foata normal form. 2/2780 useless extension candidates. Maximal degree in co-relation 14727. Up to 2007 conditions per place. [2024-06-27 18:42:16,604 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 98 selfloop transitions, 105 changer transitions 0/211 dead transitions. [2024-06-27 18:42:16,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 211 transitions, 2973 flow [2024-06-27 18:42:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:42:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:42:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-27 18:42:16,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2024-06-27 18:42:16,605 INFO L175 Difference]: Start difference. First operand has 146 places, 172 transitions, 2301 flow. Second operand 12 states and 196 transitions. [2024-06-27 18:42:16,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 211 transitions, 2973 flow [2024-06-27 18:42:16,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 211 transitions, 2660 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-06-27 18:42:16,705 INFO L231 Difference]: Finished difference. Result has 146 places, 176 transitions, 2286 flow [2024-06-27 18:42:16,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2286, PETRI_PLACES=146, PETRI_TRANSITIONS=176} [2024-06-27 18:42:16,705 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 106 predicate places. [2024-06-27 18:42:16,705 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 176 transitions, 2286 flow [2024-06-27 18:42:16,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:16,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:16,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:16,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:42:16,706 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:16,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash -916940983, now seen corresponding path program 4 times [2024-06-27 18:42:16,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:16,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119783277] [2024-06-27 18:42:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:16,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:17,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:17,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119783277] [2024-06-27 18:42:17,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119783277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:17,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:17,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:17,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72992176] [2024-06-27 18:42:17,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:17,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:17,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:17,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:17,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 176 transitions, 2286 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:17,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:17,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:17,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:17,781 INFO L124 PetriNetUnfolderBase]: 1553/3133 cut-off events. [2024-06-27 18:42:17,781 INFO L125 PetriNetUnfolderBase]: For 35316/35316 co-relation queries the response was YES. [2024-06-27 18:42:17,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15060 conditions, 3133 events. 1553/3133 cut-off events. For 35316/35316 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22021 event pairs, 504 based on Foata normal form. 4/2934 useless extension candidates. Maximal degree in co-relation 14993. Up to 2306 conditions per place. [2024-06-27 18:42:17,803 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 138 selfloop transitions, 64 changer transitions 0/210 dead transitions. [2024-06-27 18:42:17,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 210 transitions, 2860 flow [2024-06-27 18:42:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 18:42:17,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 18:42:17,804 INFO L175 Difference]: Start difference. First operand has 146 places, 176 transitions, 2286 flow. Second operand 9 states and 153 transitions. [2024-06-27 18:42:17,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 210 transitions, 2860 flow [2024-06-27 18:42:17,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 210 transitions, 2717 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 18:42:17,904 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 2337 flow [2024-06-27 18:42:17,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2337, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2024-06-27 18:42:17,904 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 107 predicate places. [2024-06-27 18:42:17,904 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 2337 flow [2024-06-27 18:42:17,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:17,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:17,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:17,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:42:17,905 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:17,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:17,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1372702907, now seen corresponding path program 5 times [2024-06-27 18:42:17,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:17,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527350098] [2024-06-27 18:42:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:17,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:18,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:18,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527350098] [2024-06-27 18:42:18,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527350098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:18,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:18,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051081150] [2024-06-27 18:42:18,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:18,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:18,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:18,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:18,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:18,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:18,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 2337 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:18,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:18,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:18,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:19,184 INFO L124 PetriNetUnfolderBase]: 1587/3244 cut-off events. [2024-06-27 18:42:19,184 INFO L125 PetriNetUnfolderBase]: For 38027/38027 co-relation queries the response was YES. [2024-06-27 18:42:19,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15659 conditions, 3244 events. 1587/3244 cut-off events. For 38027/38027 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 23010 event pairs, 487 based on Foata normal form. 4/3044 useless extension candidates. Maximal degree in co-relation 15590. Up to 1846 conditions per place. [2024-06-27 18:42:19,201 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 140 selfloop transitions, 69 changer transitions 0/217 dead transitions. [2024-06-27 18:42:19,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 217 transitions, 2930 flow [2024-06-27 18:42:19,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:19,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 18:42:19,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:42:19,202 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 2337 flow. Second operand 9 states and 162 transitions. [2024-06-27 18:42:19,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 217 transitions, 2930 flow [2024-06-27 18:42:19,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 217 transitions, 2800 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:19,306 INFO L231 Difference]: Finished difference. Result has 150 places, 182 transitions, 2381 flow [2024-06-27 18:42:19,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2381, PETRI_PLACES=150, PETRI_TRANSITIONS=182} [2024-06-27 18:42:19,306 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 110 predicate places. [2024-06-27 18:42:19,306 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 182 transitions, 2381 flow [2024-06-27 18:42:19,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:19,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:19,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:19,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:42:19,307 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:19,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1551190199, now seen corresponding path program 6 times [2024-06-27 18:42:19,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:19,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817760650] [2024-06-27 18:42:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:19,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:19,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:19,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817760650] [2024-06-27 18:42:19,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817760650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:19,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:19,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:19,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358697127] [2024-06-27 18:42:19,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:19,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:19,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:19,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:20,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:20,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 182 transitions, 2381 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:20,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:20,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:20,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:20,612 INFO L124 PetriNetUnfolderBase]: 1749/3565 cut-off events. [2024-06-27 18:42:20,612 INFO L125 PetriNetUnfolderBase]: For 48918/48920 co-relation queries the response was YES. [2024-06-27 18:42:20,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17481 conditions, 3565 events. 1749/3565 cut-off events. For 48918/48920 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 25763 event pairs, 483 based on Foata normal form. 6/3362 useless extension candidates. Maximal degree in co-relation 17411. Up to 1900 conditions per place. [2024-06-27 18:42:20,634 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 125 selfloop transitions, 94 changer transitions 0/227 dead transitions. [2024-06-27 18:42:20,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 227 transitions, 3099 flow [2024-06-27 18:42:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 18:42:20,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216049382716049 [2024-06-27 18:42:20,635 INFO L175 Difference]: Start difference. First operand has 150 places, 182 transitions, 2381 flow. Second operand 9 states and 169 transitions. [2024-06-27 18:42:20,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 227 transitions, 3099 flow [2024-06-27 18:42:20,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 227 transitions, 2977 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:20,778 INFO L231 Difference]: Finished difference. Result has 153 places, 184 transitions, 2483 flow [2024-06-27 18:42:20,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2483, PETRI_PLACES=153, PETRI_TRANSITIONS=184} [2024-06-27 18:42:20,779 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 113 predicate places. [2024-06-27 18:42:20,779 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 184 transitions, 2483 flow [2024-06-27 18:42:20,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:20,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:20,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:20,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:42:20,779 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:20,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1820364669, now seen corresponding path program 7 times [2024-06-27 18:42:20,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:20,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714462528] [2024-06-27 18:42:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:21,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:21,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714462528] [2024-06-27 18:42:21,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714462528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:21,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:21,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:21,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652512584] [2024-06-27 18:42:21,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:21,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:21,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:21,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:21,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:21,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:21,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 184 transitions, 2483 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:21,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:21,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:21,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:22,171 INFO L124 PetriNetUnfolderBase]: 1959/4091 cut-off events. [2024-06-27 18:42:22,171 INFO L125 PetriNetUnfolderBase]: For 66549/66551 co-relation queries the response was YES. [2024-06-27 18:42:22,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19281 conditions, 4091 events. 1959/4091 cut-off events. For 66549/66551 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 31398 event pairs, 722 based on Foata normal form. 30/3868 useless extension candidates. Maximal degree in co-relation 19211. Up to 2630 conditions per place. [2024-06-27 18:42:22,195 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 133 selfloop transitions, 91 changer transitions 0/232 dead transitions. [2024-06-27 18:42:22,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 232 transitions, 3170 flow [2024-06-27 18:42:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:42:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:42:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 18:42:22,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027777777777778 [2024-06-27 18:42:22,196 INFO L175 Difference]: Start difference. First operand has 153 places, 184 transitions, 2483 flow. Second operand 10 states and 181 transitions. [2024-06-27 18:42:22,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 232 transitions, 3170 flow [2024-06-27 18:42:22,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 232 transitions, 2936 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 18:42:22,322 INFO L231 Difference]: Finished difference. Result has 156 places, 186 transitions, 2482 flow [2024-06-27 18:42:22,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2482, PETRI_PLACES=156, PETRI_TRANSITIONS=186} [2024-06-27 18:42:22,323 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 116 predicate places. [2024-06-27 18:42:22,323 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 186 transitions, 2482 flow [2024-06-27 18:42:22,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:22,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:22,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:22,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:42:22,324 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:22,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1820364824, now seen corresponding path program 2 times [2024-06-27 18:42:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:22,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783477177] [2024-06-27 18:42:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:23,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:23,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783477177] [2024-06-27 18:42:23,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783477177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:23,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:23,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:23,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844753206] [2024-06-27 18:42:23,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:23,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:23,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:23,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:23,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:23,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 186 transitions, 2482 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:23,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:23,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:23,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:23,805 INFO L124 PetriNetUnfolderBase]: 1888/3894 cut-off events. [2024-06-27 18:42:23,805 INFO L125 PetriNetUnfolderBase]: For 46610/46612 co-relation queries the response was YES. [2024-06-27 18:42:23,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18258 conditions, 3894 events. 1888/3894 cut-off events. For 46610/46612 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 29427 event pairs, 686 based on Foata normal form. 4/3648 useless extension candidates. Maximal degree in co-relation 18187. Up to 2866 conditions per place. [2024-06-27 18:42:23,826 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 132 selfloop transitions, 89 changer transitions 0/229 dead transitions. [2024-06-27 18:42:23,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 229 transitions, 3196 flow [2024-06-27 18:42:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:42:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:42:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 18:42:23,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 18:42:23,827 INFO L175 Difference]: Start difference. First operand has 156 places, 186 transitions, 2482 flow. Second operand 11 states and 187 transitions. [2024-06-27 18:42:23,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 229 transitions, 3196 flow [2024-06-27 18:42:23,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 229 transitions, 3012 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 18:42:23,980 INFO L231 Difference]: Finished difference. Result has 160 places, 190 transitions, 2540 flow [2024-06-27 18:42:23,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2540, PETRI_PLACES=160, PETRI_TRANSITIONS=190} [2024-06-27 18:42:23,980 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 120 predicate places. [2024-06-27 18:42:23,980 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 190 transitions, 2540 flow [2024-06-27 18:42:23,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-27 18:42:23,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:23,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:23,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:42:23,981 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:23,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:23,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1825871354, now seen corresponding path program 3 times [2024-06-27 18:42:23,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:23,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183501385] [2024-06-27 18:42:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:23,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:24,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:24,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183501385] [2024-06-27 18:42:24,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183501385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:24,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:24,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:24,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211623572] [2024-06-27 18:42:24,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:24,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:24,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:24,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:24,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:24,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:24,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 190 transitions, 2540 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:24,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:24,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:24,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:25,552 INFO L124 PetriNetUnfolderBase]: 1901/3919 cut-off events. [2024-06-27 18:42:25,553 INFO L125 PetriNetUnfolderBase]: For 48698/48698 co-relation queries the response was YES. [2024-06-27 18:42:25,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18464 conditions, 3919 events. 1901/3919 cut-off events. For 48698/48698 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 29706 event pairs, 627 based on Foata normal form. 2/3669 useless extension candidates. Maximal degree in co-relation 18391. Up to 2987 conditions per place. [2024-06-27 18:42:25,580 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 151 selfloop transitions, 64 changer transitions 0/223 dead transitions. [2024-06-27 18:42:25,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 223 transitions, 3137 flow [2024-06-27 18:42:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:42:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:42:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 18:42:25,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-27 18:42:25,581 INFO L175 Difference]: Start difference. First operand has 160 places, 190 transitions, 2540 flow. Second operand 10 states and 166 transitions. [2024-06-27 18:42:25,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 223 transitions, 3137 flow [2024-06-27 18:42:25,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 223 transitions, 2930 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 18:42:25,722 INFO L231 Difference]: Finished difference. Result has 162 places, 192 transitions, 2509 flow [2024-06-27 18:42:25,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2509, PETRI_PLACES=162, PETRI_TRANSITIONS=192} [2024-06-27 18:42:25,722 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 122 predicate places. [2024-06-27 18:42:25,722 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 192 transitions, 2509 flow [2024-06-27 18:42:25,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:25,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:25,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:25,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:42:25,723 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:25,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:25,724 INFO L85 PathProgramCache]: Analyzing trace with hash -491243001, now seen corresponding path program 8 times [2024-06-27 18:42:25,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:25,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690150370] [2024-06-27 18:42:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:25,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:26,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:26,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690150370] [2024-06-27 18:42:26,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690150370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:26,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:26,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:26,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922224390] [2024-06-27 18:42:26,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:26,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:26,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:26,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:26,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:26,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:26,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 192 transitions, 2509 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:26,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:26,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:26,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:27,250 INFO L124 PetriNetUnfolderBase]: 2054/4348 cut-off events. [2024-06-27 18:42:27,250 INFO L125 PetriNetUnfolderBase]: For 60447/60447 co-relation queries the response was YES. [2024-06-27 18:42:27,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19094 conditions, 4348 events. 2054/4348 cut-off events. For 60447/60447 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 34215 event pairs, 782 based on Foata normal form. 28/4096 useless extension candidates. Maximal degree in co-relation 19020. Up to 2925 conditions per place. [2024-06-27 18:42:27,284 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 164 selfloop transitions, 60 changer transitions 0/232 dead transitions. [2024-06-27 18:42:27,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 232 transitions, 3165 flow [2024-06-27 18:42:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:42:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:42:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 18:42:27,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 18:42:27,285 INFO L175 Difference]: Start difference. First operand has 162 places, 192 transitions, 2509 flow. Second operand 10 states and 171 transitions. [2024-06-27 18:42:27,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 232 transitions, 3165 flow [2024-06-27 18:42:27,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 232 transitions, 3023 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 18:42:27,419 INFO L231 Difference]: Finished difference. Result has 164 places, 194 transitions, 2538 flow [2024-06-27 18:42:27,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2538, PETRI_PLACES=164, PETRI_TRANSITIONS=194} [2024-06-27 18:42:27,420 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 124 predicate places. [2024-06-27 18:42:27,420 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 194 transitions, 2538 flow [2024-06-27 18:42:27,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:27,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:27,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:27,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:42:27,421 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:27,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:27,421 INFO L85 PathProgramCache]: Analyzing trace with hash 534249470, now seen corresponding path program 1 times [2024-06-27 18:42:27,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:27,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357874968] [2024-06-27 18:42:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:27,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:28,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:28,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357874968] [2024-06-27 18:42:28,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357874968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:28,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:28,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:28,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829260234] [2024-06-27 18:42:28,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:28,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:28,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:28,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:28,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 194 transitions, 2538 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:28,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:28,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:28,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:29,099 INFO L124 PetriNetUnfolderBase]: 2082/4378 cut-off events. [2024-06-27 18:42:29,099 INFO L125 PetriNetUnfolderBase]: For 44351/44351 co-relation queries the response was YES. [2024-06-27 18:42:29,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19382 conditions, 4378 events. 2082/4378 cut-off events. For 44351/44351 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 34626 event pairs, 946 based on Foata normal form. 2/4095 useless extension candidates. Maximal degree in co-relation 19307. Up to 3670 conditions per place. [2024-06-27 18:42:29,130 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 195 selfloop transitions, 15 changer transitions 0/218 dead transitions. [2024-06-27 18:42:29,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 218 transitions, 3076 flow [2024-06-27 18:42:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 18:42:29,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-06-27 18:42:29,132 INFO L175 Difference]: Start difference. First operand has 164 places, 194 transitions, 2538 flow. Second operand 9 states and 136 transitions. [2024-06-27 18:42:29,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 218 transitions, 3076 flow [2024-06-27 18:42:29,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 218 transitions, 2950 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 18:42:29,277 INFO L231 Difference]: Finished difference. Result has 166 places, 198 transitions, 2497 flow [2024-06-27 18:42:29,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2497, PETRI_PLACES=166, PETRI_TRANSITIONS=198} [2024-06-27 18:42:29,278 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-27 18:42:29,278 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 198 transitions, 2497 flow [2024-06-27 18:42:29,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:29,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:29,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:29,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:42:29,280 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:29,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:29,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2046568889, now seen corresponding path program 9 times [2024-06-27 18:42:29,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:29,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683184592] [2024-06-27 18:42:29,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:29,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:29,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:29,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683184592] [2024-06-27 18:42:29,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683184592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:29,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:29,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:29,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872165512] [2024-06-27 18:42:29,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:29,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:29,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:29,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:29,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:30,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:30,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 198 transitions, 2497 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:30,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:30,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:30,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:30,807 INFO L124 PetriNetUnfolderBase]: 2254/4839 cut-off events. [2024-06-27 18:42:30,807 INFO L125 PetriNetUnfolderBase]: For 55590/55590 co-relation queries the response was YES. [2024-06-27 18:42:30,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20626 conditions, 4839 events. 2254/4839 cut-off events. For 55590/55590 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 39488 event pairs, 1020 based on Foata normal form. 14/4538 useless extension candidates. Maximal degree in co-relation 20549. Up to 3650 conditions per place. [2024-06-27 18:42:30,847 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 198 selfloop transitions, 28 changer transitions 0/234 dead transitions. [2024-06-27 18:42:30,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 234 transitions, 3151 flow [2024-06-27 18:42:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:42:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:42:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 18:42:30,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 18:42:30,848 INFO L175 Difference]: Start difference. First operand has 166 places, 198 transitions, 2497 flow. Second operand 10 states and 159 transitions. [2024-06-27 18:42:30,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 234 transitions, 3151 flow [2024-06-27 18:42:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 234 transitions, 3112 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:31,021 INFO L231 Difference]: Finished difference. Result has 170 places, 200 transitions, 2569 flow [2024-06-27 18:42:31,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2458, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2569, PETRI_PLACES=170, PETRI_TRANSITIONS=200} [2024-06-27 18:42:31,021 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-27 18:42:31,021 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 200 transitions, 2569 flow [2024-06-27 18:42:31,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:31,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:31,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:31,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:42:31,022 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:31,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1464573596, now seen corresponding path program 2 times [2024-06-27 18:42:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:31,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664148636] [2024-06-27 18:42:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:31,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:31,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:31,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664148636] [2024-06-27 18:42:31,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664148636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:31,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:31,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:31,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372297743] [2024-06-27 18:42:31,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:31,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:31,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:31,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:31,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:32,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:32,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 200 transitions, 2569 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:32,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:32,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:32,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:32,844 INFO L124 PetriNetUnfolderBase]: 2271/4838 cut-off events. [2024-06-27 18:42:32,844 INFO L125 PetriNetUnfolderBase]: For 48546/48546 co-relation queries the response was YES. [2024-06-27 18:42:32,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20761 conditions, 4838 events. 2271/4838 cut-off events. For 48546/48546 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 39483 event pairs, 1050 based on Foata normal form. 2/4522 useless extension candidates. Maximal degree in co-relation 20683. Up to 4048 conditions per place. [2024-06-27 18:42:32,879 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 201 selfloop transitions, 13 changer transitions 0/222 dead transitions. [2024-06-27 18:42:32,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 222 transitions, 3093 flow [2024-06-27 18:42:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 18:42:32,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228395061728395 [2024-06-27 18:42:32,881 INFO L175 Difference]: Start difference. First operand has 170 places, 200 transitions, 2569 flow. Second operand 9 states and 137 transitions. [2024-06-27 18:42:32,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 222 transitions, 3093 flow [2024-06-27 18:42:33,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 222 transitions, 3027 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 18:42:33,027 INFO L231 Difference]: Finished difference. Result has 171 places, 201 transitions, 2551 flow [2024-06-27 18:42:33,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2551, PETRI_PLACES=171, PETRI_TRANSITIONS=201} [2024-06-27 18:42:33,028 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-27 18:42:33,028 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 201 transitions, 2551 flow [2024-06-27 18:42:33,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:33,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:33,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:33,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:42:33,028 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:33,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:33,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1380228996, now seen corresponding path program 3 times [2024-06-27 18:42:33,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:33,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923533864] [2024-06-27 18:42:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:33,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:33,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:33,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923533864] [2024-06-27 18:42:33,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923533864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:33,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:33,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956718673] [2024-06-27 18:42:33,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:33,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:33,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:33,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:33,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 201 transitions, 2551 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:33,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:33,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:33,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:34,765 INFO L124 PetriNetUnfolderBase]: 2288/4879 cut-off events. [2024-06-27 18:42:34,765 INFO L125 PetriNetUnfolderBase]: For 49983/49983 co-relation queries the response was YES. [2024-06-27 18:42:34,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20896 conditions, 4879 events. 2288/4879 cut-off events. For 49983/49983 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 39949 event pairs, 1062 based on Foata normal form. 2/4562 useless extension candidates. Maximal degree in co-relation 20817. Up to 4049 conditions per place. [2024-06-27 18:42:34,798 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 199 selfloop transitions, 20 changer transitions 0/227 dead transitions. [2024-06-27 18:42:34,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 227 transitions, 3123 flow [2024-06-27 18:42:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 18:42:34,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2024-06-27 18:42:34,799 INFO L175 Difference]: Start difference. First operand has 171 places, 201 transitions, 2551 flow. Second operand 9 states and 140 transitions. [2024-06-27 18:42:34,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 227 transitions, 3123 flow [2024-06-27 18:42:34,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 227 transitions, 3085 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 18:42:34,993 INFO L231 Difference]: Finished difference. Result has 174 places, 205 transitions, 2616 flow [2024-06-27 18:42:34,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2616, PETRI_PLACES=174, PETRI_TRANSITIONS=205} [2024-06-27 18:42:34,993 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-27 18:42:34,993 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 205 transitions, 2616 flow [2024-06-27 18:42:34,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:34,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:34,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:34,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:42:34,994 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:34,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1751701508, now seen corresponding path program 4 times [2024-06-27 18:42:34,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:34,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768490489] [2024-06-27 18:42:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:34,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:35,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:35,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768490489] [2024-06-27 18:42:35,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768490489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:35,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:35,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:35,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480503965] [2024-06-27 18:42:35,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:35,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:35,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:35,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:35,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:35,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:35,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 205 transitions, 2616 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:35,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:35,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:35,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:36,573 INFO L124 PetriNetUnfolderBase]: 2289/4880 cut-off events. [2024-06-27 18:42:36,573 INFO L125 PetriNetUnfolderBase]: For 50117/50117 co-relation queries the response was YES. [2024-06-27 18:42:36,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20877 conditions, 4880 events. 2289/4880 cut-off events. For 50117/50117 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 39793 event pairs, 1044 based on Foata normal form. 2/4587 useless extension candidates. Maximal degree in co-relation 20796. Up to 4074 conditions per place. [2024-06-27 18:42:36,612 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 209 selfloop transitions, 13 changer transitions 0/230 dead transitions. [2024-06-27 18:42:36,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 230 transitions, 3178 flow [2024-06-27 18:42:36,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 18:42:36,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 18:42:36,613 INFO L175 Difference]: Start difference. First operand has 174 places, 205 transitions, 2616 flow. Second operand 9 states and 138 transitions. [2024-06-27 18:42:36,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 230 transitions, 3178 flow [2024-06-27 18:42:36,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 230 transitions, 3121 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:36,823 INFO L231 Difference]: Finished difference. Result has 178 places, 208 transitions, 2630 flow [2024-06-27 18:42:36,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2630, PETRI_PLACES=178, PETRI_TRANSITIONS=208} [2024-06-27 18:42:36,824 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-27 18:42:36,824 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 208 transitions, 2630 flow [2024-06-27 18:42:36,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:36,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:36,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:36,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:42:36,824 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:36,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1497118144, now seen corresponding path program 4 times [2024-06-27 18:42:36,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:36,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575479813] [2024-06-27 18:42:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:36,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:37,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:37,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575479813] [2024-06-27 18:42:37,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575479813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:37,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:37,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:37,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715654829] [2024-06-27 18:42:37,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:37,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:37,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:37,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:37,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:37,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 208 transitions, 2630 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:37,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:37,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:37,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:38,517 INFO L124 PetriNetUnfolderBase]: 2302/4898 cut-off events. [2024-06-27 18:42:38,518 INFO L125 PetriNetUnfolderBase]: For 51894/51894 co-relation queries the response was YES. [2024-06-27 18:42:38,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21088 conditions, 4898 events. 2302/4898 cut-off events. For 51894/51894 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 40008 event pairs, 1041 based on Foata normal form. 2/4576 useless extension candidates. Maximal degree in co-relation 21005. Up to 4023 conditions per place. [2024-06-27 18:42:38,553 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 196 selfloop transitions, 37 changer transitions 0/241 dead transitions. [2024-06-27 18:42:38,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 241 transitions, 3273 flow [2024-06-27 18:42:38,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:42:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:42:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-27 18:42:38,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-27 18:42:38,555 INFO L175 Difference]: Start difference. First operand has 178 places, 208 transitions, 2630 flow. Second operand 11 states and 170 transitions. [2024-06-27 18:42:38,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 241 transitions, 3273 flow [2024-06-27 18:42:38,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 241 transitions, 3228 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:38,763 INFO L231 Difference]: Finished difference. Result has 183 places, 210 transitions, 2707 flow [2024-06-27 18:42:38,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2707, PETRI_PLACES=183, PETRI_TRANSITIONS=210} [2024-06-27 18:42:38,763 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 143 predicate places. [2024-06-27 18:42:38,763 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 210 transitions, 2707 flow [2024-06-27 18:42:38,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:38,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:38,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:38,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:42:38,764 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:38,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:38,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2046568734, now seen corresponding path program 5 times [2024-06-27 18:42:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:38,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097831971] [2024-06-27 18:42:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:38,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:39,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:39,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097831971] [2024-06-27 18:42:39,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097831971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:39,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:39,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:39,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480513211] [2024-06-27 18:42:39,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:39,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:39,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:39,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:39,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:39,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 210 transitions, 2707 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:39,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:39,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:39,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:40,441 INFO L124 PetriNetUnfolderBase]: 2298/4891 cut-off events. [2024-06-27 18:42:40,442 INFO L125 PetriNetUnfolderBase]: For 51148/51148 co-relation queries the response was YES. [2024-06-27 18:42:40,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20980 conditions, 4891 events. 2298/4891 cut-off events. For 51148/51148 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 39962 event pairs, 1045 based on Foata normal form. 2/4569 useless extension candidates. Maximal degree in co-relation 20896. Up to 4011 conditions per place. [2024-06-27 18:42:40,482 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 196 selfloop transitions, 36 changer transitions 0/240 dead transitions. [2024-06-27 18:42:40,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 240 transitions, 3392 flow [2024-06-27 18:42:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:42:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:42:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-27 18:42:40,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-27 18:42:40,484 INFO L175 Difference]: Start difference. First operand has 183 places, 210 transitions, 2707 flow. Second operand 11 states and 167 transitions. [2024-06-27 18:42:40,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 240 transitions, 3392 flow [2024-06-27 18:42:40,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 240 transitions, 3286 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 18:42:40,725 INFO L231 Difference]: Finished difference. Result has 184 places, 210 transitions, 2679 flow [2024-06-27 18:42:40,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2601, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2679, PETRI_PLACES=184, PETRI_TRANSITIONS=210} [2024-06-27 18:42:40,725 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 144 predicate places. [2024-06-27 18:42:40,725 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 210 transitions, 2679 flow [2024-06-27 18:42:40,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:40,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:40,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:40,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:42:40,726 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:40,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:40,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1762155204, now seen corresponding path program 6 times [2024-06-27 18:42:40,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:40,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370294560] [2024-06-27 18:42:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:40,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:41,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:41,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370294560] [2024-06-27 18:42:41,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370294560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:41,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:41,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:41,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365572390] [2024-06-27 18:42:41,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:41,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:41,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:41,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:41,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:41,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:41,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 210 transitions, 2679 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:41,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:41,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:41,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:42,340 INFO L124 PetriNetUnfolderBase]: 2315/4918 cut-off events. [2024-06-27 18:42:42,340 INFO L125 PetriNetUnfolderBase]: For 51014/51014 co-relation queries the response was YES. [2024-06-27 18:42:42,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20848 conditions, 4918 events. 2315/4918 cut-off events. For 51014/51014 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 40108 event pairs, 1059 based on Foata normal form. 2/4592 useless extension candidates. Maximal degree in co-relation 20764. Up to 4123 conditions per place. [2024-06-27 18:42:42,378 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 214 selfloop transitions, 16 changer transitions 0/238 dead transitions. [2024-06-27 18:42:42,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 238 transitions, 3296 flow [2024-06-27 18:42:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:42:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:42:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-27 18:42:42,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-27 18:42:42,379 INFO L175 Difference]: Start difference. First operand has 184 places, 210 transitions, 2679 flow. Second operand 10 states and 148 transitions. [2024-06-27 18:42:42,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 238 transitions, 3296 flow [2024-06-27 18:42:42,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 238 transitions, 2942 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-06-27 18:42:42,583 INFO L231 Difference]: Finished difference. Result has 184 places, 218 transitions, 2470 flow [2024-06-27 18:42:42,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2470, PETRI_PLACES=184, PETRI_TRANSITIONS=218} [2024-06-27 18:42:42,583 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 144 predicate places. [2024-06-27 18:42:42,583 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 218 transitions, 2470 flow [2024-06-27 18:42:42,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:42,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:42,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:42,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:42:42,584 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:42,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:42,585 INFO L85 PathProgramCache]: Analyzing trace with hash -961948927, now seen corresponding path program 10 times [2024-06-27 18:42:42,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:42,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161075881] [2024-06-27 18:42:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:42,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:43,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:43,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161075881] [2024-06-27 18:42:43,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161075881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:43,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:43,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:43,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814590211] [2024-06-27 18:42:43,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:43,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:43,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:43,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:43,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:43,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:43,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 218 transitions, 2470 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:43,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:43,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:43,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:44,208 INFO L124 PetriNetUnfolderBase]: 2296/4927 cut-off events. [2024-06-27 18:42:44,208 INFO L125 PetriNetUnfolderBase]: For 48638/48638 co-relation queries the response was YES. [2024-06-27 18:42:44,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19745 conditions, 4927 events. 2296/4927 cut-off events. For 48638/48638 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 40280 event pairs, 1007 based on Foata normal form. 14/4614 useless extension candidates. Maximal degree in co-relation 19661. Up to 3697 conditions per place. [2024-06-27 18:42:44,248 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 213 selfloop transitions, 33 changer transitions 0/254 dead transitions. [2024-06-27 18:42:44,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 254 transitions, 3147 flow [2024-06-27 18:42:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:42:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:42:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 18:42:44,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-27 18:42:44,249 INFO L175 Difference]: Start difference. First operand has 184 places, 218 transitions, 2470 flow. Second operand 10 states and 163 transitions. [2024-06-27 18:42:44,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 254 transitions, 3147 flow [2024-06-27 18:42:44,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 254 transitions, 3101 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 18:42:44,468 INFO L231 Difference]: Finished difference. Result has 189 places, 218 transitions, 2502 flow [2024-06-27 18:42:44,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2502, PETRI_PLACES=189, PETRI_TRANSITIONS=218} [2024-06-27 18:42:44,469 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 149 predicate places. [2024-06-27 18:42:44,469 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 218 transitions, 2502 flow [2024-06-27 18:42:44,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:44,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:44,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:44,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:42:44,470 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:44,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1274587605, now seen corresponding path program 1 times [2024-06-27 18:42:44,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:44,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368271205] [2024-06-27 18:42:44,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:44,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:45,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:45,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368271205] [2024-06-27 18:42:45,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368271205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:45,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:45,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:45,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228735675] [2024-06-27 18:42:45,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:45,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:45,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:45,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:45,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:45,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:45,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 218 transitions, 2502 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:45,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:45,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:45,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:46,068 INFO L124 PetriNetUnfolderBase]: 2736/6048 cut-off events. [2024-06-27 18:42:46,068 INFO L125 PetriNetUnfolderBase]: For 51502/51502 co-relation queries the response was YES. [2024-06-27 18:42:46,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23192 conditions, 6048 events. 2736/6048 cut-off events. For 51502/51502 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 52638 event pairs, 1164 based on Foata normal form. 8/5686 useless extension candidates. Maximal degree in co-relation 23107. Up to 2530 conditions per place. [2024-06-27 18:42:46,109 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 144 selfloop transitions, 112 changer transitions 0/264 dead transitions. [2024-06-27 18:42:46,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 264 transitions, 3386 flow [2024-06-27 18:42:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:42:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:42:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 18:42:46,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027777777777778 [2024-06-27 18:42:46,111 INFO L175 Difference]: Start difference. First operand has 189 places, 218 transitions, 2502 flow. Second operand 10 states and 181 transitions. [2024-06-27 18:42:46,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 264 transitions, 3386 flow [2024-06-27 18:42:46,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 264 transitions, 3273 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 18:42:46,369 INFO L231 Difference]: Finished difference. Result has 190 places, 218 transitions, 2617 flow [2024-06-27 18:42:46,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2617, PETRI_PLACES=190, PETRI_TRANSITIONS=218} [2024-06-27 18:42:46,370 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 150 predicate places. [2024-06-27 18:42:46,370 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 218 transitions, 2617 flow [2024-06-27 18:42:46,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:46,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:46,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:46,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:42:46,370 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:46,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1693382233, now seen corresponding path program 2 times [2024-06-27 18:42:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:46,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362023849] [2024-06-27 18:42:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:46,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:47,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:47,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362023849] [2024-06-27 18:42:47,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362023849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:47,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:47,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:47,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297716049] [2024-06-27 18:42:47,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:47,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:47,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:47,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:47,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 218 transitions, 2617 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:47,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:47,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:47,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:48,463 INFO L124 PetriNetUnfolderBase]: 3100/6802 cut-off events. [2024-06-27 18:42:48,463 INFO L125 PetriNetUnfolderBase]: For 66926/66926 co-relation queries the response was YES. [2024-06-27 18:42:48,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26950 conditions, 6802 events. 3100/6802 cut-off events. For 66926/66926 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 61263 event pairs, 1729 based on Foata normal form. 8/6346 useless extension candidates. Maximal degree in co-relation 26864. Up to 4377 conditions per place. [2024-06-27 18:42:48,519 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 209 selfloop transitions, 110 changer transitions 0/327 dead transitions. [2024-06-27 18:42:48,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 327 transitions, 4347 flow [2024-06-27 18:42:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:42:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:42:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-27 18:42:48,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 18:42:48,520 INFO L175 Difference]: Start difference. First operand has 190 places, 218 transitions, 2617 flow. Second operand 12 states and 207 transitions. [2024-06-27 18:42:48,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 327 transitions, 4347 flow [2024-06-27 18:42:48,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 327 transitions, 4057 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:42:48,814 INFO L231 Difference]: Finished difference. Result has 201 places, 265 transitions, 3445 flow [2024-06-27 18:42:48,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3445, PETRI_PLACES=201, PETRI_TRANSITIONS=265} [2024-06-27 18:42:48,814 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 161 predicate places. [2024-06-27 18:42:48,814 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 265 transitions, 3445 flow [2024-06-27 18:42:48,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:48,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:48,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:48,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:42:48,815 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:48,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:48,815 INFO L85 PathProgramCache]: Analyzing trace with hash -416605747, now seen corresponding path program 3 times [2024-06-27 18:42:48,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:48,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386330877] [2024-06-27 18:42:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:48,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:49,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386330877] [2024-06-27 18:42:49,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386330877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:49,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:49,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:49,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178833993] [2024-06-27 18:42:49,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:49,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:49,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:49,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:49,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:49,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 265 transitions, 3445 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:49,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:49,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:49,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:50,919 INFO L124 PetriNetUnfolderBase]: 3251/7072 cut-off events. [2024-06-27 18:42:50,919 INFO L125 PetriNetUnfolderBase]: For 78235/78237 co-relation queries the response was YES. [2024-06-27 18:42:50,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30167 conditions, 7072 events. 3251/7072 cut-off events. For 78235/78237 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 63422 event pairs, 1290 based on Foata normal form. 10/6557 useless extension candidates. Maximal degree in co-relation 30073. Up to 4489 conditions per place. [2024-06-27 18:42:50,983 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 239 selfloop transitions, 162 changer transitions 0/409 dead transitions. [2024-06-27 18:42:50,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 409 transitions, 5885 flow [2024-06-27 18:42:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:42:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:42:50,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 226 transitions. [2024-06-27 18:42:50,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829059829059829 [2024-06-27 18:42:50,984 INFO L175 Difference]: Start difference. First operand has 201 places, 265 transitions, 3445 flow. Second operand 13 states and 226 transitions. [2024-06-27 18:42:50,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 409 transitions, 5885 flow [2024-06-27 18:42:51,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 409 transitions, 5795 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 18:42:51,321 INFO L231 Difference]: Finished difference. Result has 220 places, 337 transitions, 5101 flow [2024-06-27 18:42:51,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5101, PETRI_PLACES=220, PETRI_TRANSITIONS=337} [2024-06-27 18:42:51,321 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 180 predicate places. [2024-06-27 18:42:51,321 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 337 transitions, 5101 flow [2024-06-27 18:42:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:51,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:51,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:51,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:42:51,322 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:51,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:51,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1491633279, now seen corresponding path program 4 times [2024-06-27 18:42:51,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:51,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186136443] [2024-06-27 18:42:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:51,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:52,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:52,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186136443] [2024-06-27 18:42:52,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186136443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:52,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:52,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054745980] [2024-06-27 18:42:52,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:52,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:52,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:52,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:52,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:52,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:52,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 337 transitions, 5101 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:52,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:52,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:52,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:53,572 INFO L124 PetriNetUnfolderBase]: 3417/7568 cut-off events. [2024-06-27 18:42:53,572 INFO L125 PetriNetUnfolderBase]: For 86632/86638 co-relation queries the response was YES. [2024-06-27 18:42:53,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33056 conditions, 7568 events. 3417/7568 cut-off events. For 86632/86638 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 69468 event pairs, 1408 based on Foata normal form. 14/7001 useless extension candidates. Maximal degree in co-relation 32952. Up to 4415 conditions per place. [2024-06-27 18:42:53,632 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 244 selfloop transitions, 165 changer transitions 0/417 dead transitions. [2024-06-27 18:42:53,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 417 transitions, 6562 flow [2024-06-27 18:42:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:42:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:42:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 218 transitions. [2024-06-27 18:42:53,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-27 18:42:53,633 INFO L175 Difference]: Start difference. First operand has 220 places, 337 transitions, 5101 flow. Second operand 12 states and 218 transitions. [2024-06-27 18:42:53,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 417 transitions, 6562 flow [2024-06-27 18:42:54,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 417 transitions, 6528 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 18:42:54,059 INFO L231 Difference]: Finished difference. Result has 232 places, 343 transitions, 5517 flow [2024-06-27 18:42:54,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5517, PETRI_PLACES=232, PETRI_TRANSITIONS=343} [2024-06-27 18:42:54,060 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 192 predicate places. [2024-06-27 18:42:54,060 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 343 transitions, 5517 flow [2024-06-27 18:42:54,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:54,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:54,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:54,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:42:54,061 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:54,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1235039699, now seen corresponding path program 5 times [2024-06-27 18:42:54,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:54,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596505673] [2024-06-27 18:42:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:54,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:54,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596505673] [2024-06-27 18:42:54,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596505673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:54,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:54,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708690067] [2024-06-27 18:42:54,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:54,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:54,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 343 transitions, 5517 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:54,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:54,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:54,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:56,399 INFO L124 PetriNetUnfolderBase]: 3404/7433 cut-off events. [2024-06-27 18:42:56,400 INFO L125 PetriNetUnfolderBase]: For 81594/81600 co-relation queries the response was YES. [2024-06-27 18:42:56,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33197 conditions, 7433 events. 3404/7433 cut-off events. For 81594/81600 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67803 event pairs, 1531 based on Foata normal form. 16/6886 useless extension candidates. Maximal degree in co-relation 33089. Up to 5403 conditions per place. [2024-06-27 18:42:56,467 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 236 selfloop transitions, 166 changer transitions 0/410 dead transitions. [2024-06-27 18:42:56,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 410 transitions, 6770 flow [2024-06-27 18:42:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:42:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:42:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 233 transitions. [2024-06-27 18:42:56,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623015873015873 [2024-06-27 18:42:56,469 INFO L175 Difference]: Start difference. First operand has 232 places, 343 transitions, 5517 flow. Second operand 14 states and 233 transitions. [2024-06-27 18:42:56,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 410 transitions, 6770 flow [2024-06-27 18:42:56,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 410 transitions, 6478 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:42:56,915 INFO L231 Difference]: Finished difference. Result has 240 places, 349 transitions, 5669 flow [2024-06-27 18:42:56,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=5225, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5669, PETRI_PLACES=240, PETRI_TRANSITIONS=349} [2024-06-27 18:42:56,916 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 200 predicate places. [2024-06-27 18:42:56,916 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 349 transitions, 5669 flow [2024-06-27 18:42:56,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:56,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:56,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:56,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:42:56,916 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:56,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1157856091, now seen corresponding path program 6 times [2024-06-27 18:42:56,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:56,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094437632] [2024-06-27 18:42:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:56,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:57,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:57,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094437632] [2024-06-27 18:42:57,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094437632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:57,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:57,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:42:57,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723438426] [2024-06-27 18:42:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:57,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:42:57,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:57,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:42:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:42:57,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:42:57,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 349 transitions, 5669 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:57,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:57,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:42:57,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:59,608 INFO L124 PetriNetUnfolderBase]: 3924/8619 cut-off events. [2024-06-27 18:42:59,608 INFO L125 PetriNetUnfolderBase]: For 101629/101632 co-relation queries the response was YES. [2024-06-27 18:42:59,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39062 conditions, 8619 events. 3924/8619 cut-off events. For 101629/101632 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 81085 event pairs, 1656 based on Foata normal form. 11/8013 useless extension candidates. Maximal degree in co-relation 38951. Up to 5455 conditions per place. [2024-06-27 18:42:59,695 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 205 selfloop transitions, 262 changer transitions 0/475 dead transitions. [2024-06-27 18:42:59,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 475 transitions, 8324 flow [2024-06-27 18:42:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:42:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:42:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-27 18:42:59,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2024-06-27 18:42:59,697 INFO L175 Difference]: Start difference. First operand has 240 places, 349 transitions, 5669 flow. Second operand 11 states and 203 transitions. [2024-06-27 18:42:59,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 475 transitions, 8324 flow [2024-06-27 18:43:00,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 475 transitions, 7952 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 18:43:00,257 INFO L231 Difference]: Finished difference. Result has 245 places, 408 transitions, 7135 flow [2024-06-27 18:43:00,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7135, PETRI_PLACES=245, PETRI_TRANSITIONS=408} [2024-06-27 18:43:00,258 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 205 predicate places. [2024-06-27 18:43:00,258 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 408 transitions, 7135 flow [2024-06-27 18:43:00,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:00,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:00,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:43:00,259 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:00,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1631139127, now seen corresponding path program 7 times [2024-06-27 18:43:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:00,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498871146] [2024-06-27 18:43:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:00,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:00,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498871146] [2024-06-27 18:43:00,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498871146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:00,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:00,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:43:00,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527718816] [2024-06-27 18:43:00,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:00,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:43:00,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:00,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:43:00,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:43:00,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:00,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 408 transitions, 7135 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:00,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:00,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:00,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:02,815 INFO L124 PetriNetUnfolderBase]: 4009/8846 cut-off events. [2024-06-27 18:43:02,815 INFO L125 PetriNetUnfolderBase]: For 108780/108781 co-relation queries the response was YES. [2024-06-27 18:43:02,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41046 conditions, 8846 events. 4009/8846 cut-off events. For 108780/108781 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 84002 event pairs, 1928 based on Foata normal form. 11/8210 useless extension candidates. Maximal degree in co-relation 40930. Up to 6224 conditions per place. [2024-06-27 18:43:02,894 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 193 selfloop transitions, 260 changer transitions 0/461 dead transitions. [2024-06-27 18:43:02,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 461 transitions, 8533 flow [2024-06-27 18:43:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:43:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:43:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 18:43:02,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-27 18:43:02,896 INFO L175 Difference]: Start difference. First operand has 245 places, 408 transitions, 7135 flow. Second operand 11 states and 190 transitions. [2024-06-27 18:43:02,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 461 transitions, 8533 flow [2024-06-27 18:43:03,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 461 transitions, 8249 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:43:03,592 INFO L231 Difference]: Finished difference. Result has 254 places, 412 transitions, 7450 flow [2024-06-27 18:43:03,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=6851, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7450, PETRI_PLACES=254, PETRI_TRANSITIONS=412} [2024-06-27 18:43:03,592 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 214 predicate places. [2024-06-27 18:43:03,593 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 412 transitions, 7450 flow [2024-06-27 18:43:03,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:03,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:03,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:03,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:43:03,593 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:03,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:03,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1603045429, now seen corresponding path program 8 times [2024-06-27 18:43:03,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:03,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220550258] [2024-06-27 18:43:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:03,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:04,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:04,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220550258] [2024-06-27 18:43:04,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220550258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:04,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:04,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:43:04,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166804233] [2024-06-27 18:43:04,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:04,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:43:04,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:43:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:43:04,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:04,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 412 transitions, 7450 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:04,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:04,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:04,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:06,263 INFO L124 PetriNetUnfolderBase]: 3999/8854 cut-off events. [2024-06-27 18:43:06,264 INFO L125 PetriNetUnfolderBase]: For 98498/98499 co-relation queries the response was YES. [2024-06-27 18:43:06,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40833 conditions, 8854 events. 3999/8854 cut-off events. For 98498/98499 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 84207 event pairs, 1774 based on Foata normal form. 9/8211 useless extension candidates. Maximal degree in co-relation 40714. Up to 5867 conditions per place. [2024-06-27 18:43:06,358 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 202 selfloop transitions, 260 changer transitions 0/470 dead transitions. [2024-06-27 18:43:06,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 470 transitions, 8884 flow [2024-06-27 18:43:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:43:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:43:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-27 18:43:06,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-27 18:43:06,359 INFO L175 Difference]: Start difference. First operand has 254 places, 412 transitions, 7450 flow. Second operand 11 states and 197 transitions. [2024-06-27 18:43:06,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 470 transitions, 8884 flow [2024-06-27 18:43:07,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 470 transitions, 8378 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:43:07,013 INFO L231 Difference]: Finished difference. Result has 259 places, 414 transitions, 7509 flow [2024-06-27 18:43:07,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7509, PETRI_PLACES=259, PETRI_TRANSITIONS=414} [2024-06-27 18:43:07,013 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 219 predicate places. [2024-06-27 18:43:07,014 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 414 transitions, 7509 flow [2024-06-27 18:43:07,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:07,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:07,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:07,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:43:07,014 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:07,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:07,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1032317821, now seen corresponding path program 9 times [2024-06-27 18:43:07,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:07,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933920405] [2024-06-27 18:43:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:07,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:07,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:07,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933920405] [2024-06-27 18:43:07,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933920405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:07,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:07,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:43:07,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79428382] [2024-06-27 18:43:07,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:07,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:43:07,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:43:07,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:43:07,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:07,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 414 transitions, 7509 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:07,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:07,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:07,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:09,900 INFO L124 PetriNetUnfolderBase]: 4696/10325 cut-off events. [2024-06-27 18:43:09,900 INFO L125 PetriNetUnfolderBase]: For 121353/121354 co-relation queries the response was YES. [2024-06-27 18:43:09,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47886 conditions, 10325 events. 4696/10325 cut-off events. For 121353/121354 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 101310 event pairs, 2345 based on Foata normal form. 9/9532 useless extension candidates. Maximal degree in co-relation 47765. Up to 6826 conditions per place. [2024-06-27 18:43:09,995 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 358 selfloop transitions, 193 changer transitions 0/559 dead transitions. [2024-06-27 18:43:09,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 559 transitions, 10611 flow [2024-06-27 18:43:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:43:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:43:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-27 18:43:09,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176767676767676 [2024-06-27 18:43:09,996 INFO L175 Difference]: Start difference. First operand has 259 places, 414 transitions, 7509 flow. Second operand 11 states and 205 transitions. [2024-06-27 18:43:09,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 559 transitions, 10611 flow [2024-06-27 18:43:10,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 559 transitions, 9974 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:43:10,821 INFO L231 Difference]: Finished difference. Result has 268 places, 497 transitions, 9169 flow [2024-06-27 18:43:10,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9169, PETRI_PLACES=268, PETRI_TRANSITIONS=497} [2024-06-27 18:43:10,821 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 228 predicate places. [2024-06-27 18:43:10,821 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 497 transitions, 9169 flow [2024-06-27 18:43:10,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:10,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:10,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:10,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:43:10,822 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:10,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1032433141, now seen corresponding path program 10 times [2024-06-27 18:43:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:10,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072685483] [2024-06-27 18:43:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:11,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:11,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072685483] [2024-06-27 18:43:11,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072685483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:11,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:11,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:43:11,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49955707] [2024-06-27 18:43:11,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:11,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:43:11,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:11,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:43:11,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:43:11,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:11,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 497 transitions, 9169 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:11,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:11,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:11,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:14,137 INFO L124 PetriNetUnfolderBase]: 4884/10788 cut-off events. [2024-06-27 18:43:14,138 INFO L125 PetriNetUnfolderBase]: For 143667/143668 co-relation queries the response was YES. [2024-06-27 18:43:14,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50890 conditions, 10788 events. 4884/10788 cut-off events. For 143667/143668 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 107002 event pairs, 2446 based on Foata normal form. 9/9931 useless extension candidates. Maximal degree in co-relation 50762. Up to 8228 conditions per place. [2024-06-27 18:43:14,264 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 353 selfloop transitions, 201 changer transitions 0/562 dead transitions. [2024-06-27 18:43:14,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 562 transitions, 10928 flow [2024-06-27 18:43:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:43:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:43:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 18:43:14,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-06-27 18:43:14,266 INFO L175 Difference]: Start difference. First operand has 268 places, 497 transitions, 9169 flow. Second operand 11 states and 201 transitions. [2024-06-27 18:43:14,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 562 transitions, 10928 flow [2024-06-27 18:43:15,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 562 transitions, 10803 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 18:43:15,394 INFO L231 Difference]: Finished difference. Result has 278 places, 508 transitions, 9762 flow [2024-06-27 18:43:15,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9762, PETRI_PLACES=278, PETRI_TRANSITIONS=508} [2024-06-27 18:43:15,395 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 238 predicate places. [2024-06-27 18:43:15,395 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 508 transitions, 9762 flow [2024-06-27 18:43:15,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:15,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:15,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:15,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:43:15,396 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:15,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1032437791, now seen corresponding path program 11 times [2024-06-27 18:43:15,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:15,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919852449] [2024-06-27 18:43:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:15,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:16,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:16,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919852449] [2024-06-27 18:43:16,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919852449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:16,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:16,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:43:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105216992] [2024-06-27 18:43:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:16,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:43:16,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:43:16,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:43:16,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:16,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 508 transitions, 9762 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:16,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:16,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:16,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:18,340 INFO L124 PetriNetUnfolderBase]: 4871/10780 cut-off events. [2024-06-27 18:43:18,340 INFO L125 PetriNetUnfolderBase]: For 136169/136170 co-relation queries the response was YES. [2024-06-27 18:43:18,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50550 conditions, 10780 events. 4871/10780 cut-off events. For 136169/136170 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 106976 event pairs, 2496 based on Foata normal form. 11/9919 useless extension candidates. Maximal degree in co-relation 50419. Up to 8377 conditions per place. [2024-06-27 18:43:18,479 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 345 selfloop transitions, 201 changer transitions 0/554 dead transitions. [2024-06-27 18:43:18,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 554 transitions, 11134 flow [2024-06-27 18:43:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:43:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:43:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 18:43:18,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-27 18:43:18,481 INFO L175 Difference]: Start difference. First operand has 278 places, 508 transitions, 9762 flow. Second operand 11 states and 193 transitions. [2024-06-27 18:43:18,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 554 transitions, 11134 flow [2024-06-27 18:43:19,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 554 transitions, 10745 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:43:19,424 INFO L231 Difference]: Finished difference. Result has 283 places, 509 transitions, 9801 flow [2024-06-27 18:43:19,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=9373, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9801, PETRI_PLACES=283, PETRI_TRANSITIONS=509} [2024-06-27 18:43:19,425 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 243 predicate places. [2024-06-27 18:43:19,425 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 509 transitions, 9801 flow [2024-06-27 18:43:19,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:19,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:19,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:19,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:43:19,426 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:19,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1036901791, now seen corresponding path program 12 times [2024-06-27 18:43:19,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:19,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561241742] [2024-06-27 18:43:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:19,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:20,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:20,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561241742] [2024-06-27 18:43:20,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561241742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:20,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:20,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:43:20,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119920778] [2024-06-27 18:43:20,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:20,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:43:20,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:20,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:43:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:43:20,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:20,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 509 transitions, 9801 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:20,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:20,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:20,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:22,639 INFO L124 PetriNetUnfolderBase]: 5043/11208 cut-off events. [2024-06-27 18:43:22,639 INFO L125 PetriNetUnfolderBase]: For 154134/154135 co-relation queries the response was YES. [2024-06-27 18:43:22,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52499 conditions, 11208 events. 5043/11208 cut-off events. For 154134/154135 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 112341 event pairs, 2626 based on Foata normal form. 9/10327 useless extension candidates. Maximal degree in co-relation 52366. Up to 8418 conditions per place. [2024-06-27 18:43:22,773 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 422 selfloop transitions, 130 changer transitions 0/560 dead transitions. [2024-06-27 18:43:22,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 560 transitions, 11317 flow [2024-06-27 18:43:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:43:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:43:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-27 18:43:22,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-27 18:43:22,774 INFO L175 Difference]: Start difference. First operand has 283 places, 509 transitions, 9801 flow. Second operand 11 states and 197 transitions. [2024-06-27 18:43:22,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 560 transitions, 11317 flow [2024-06-27 18:43:24,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 560 transitions, 10923 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:43:24,032 INFO L231 Difference]: Finished difference. Result has 288 places, 511 transitions, 9751 flow [2024-06-27 18:43:24,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=9407, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9751, PETRI_PLACES=288, PETRI_TRANSITIONS=511} [2024-06-27 18:43:24,033 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 248 predicate places. [2024-06-27 18:43:24,033 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 511 transitions, 9751 flow [2024-06-27 18:43:24,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:24,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:24,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:24,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:43:24,034 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:24,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:24,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1203140221, now seen corresponding path program 13 times [2024-06-27 18:43:24,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:24,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363437184] [2024-06-27 18:43:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:24,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:24,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:24,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363437184] [2024-06-27 18:43:24,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363437184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:24,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:24,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:43:24,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116889517] [2024-06-27 18:43:24,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:24,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:43:24,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:24,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:43:24,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:43:24,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:24,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 511 transitions, 9751 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:24,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:24,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:24,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:27,664 INFO L124 PetriNetUnfolderBase]: 5152/11462 cut-off events. [2024-06-27 18:43:27,665 INFO L125 PetriNetUnfolderBase]: For 159635/159642 co-relation queries the response was YES. [2024-06-27 18:43:27,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53542 conditions, 11462 events. 5152/11462 cut-off events. For 159635/159642 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 115496 event pairs, 2757 based on Foata normal form. 17/10561 useless extension candidates. Maximal degree in co-relation 53406. Up to 9033 conditions per place. [2024-06-27 18:43:27,790 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 426 selfloop transitions, 134 changer transitions 0/568 dead transitions. [2024-06-27 18:43:27,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 568 transitions, 11448 flow [2024-06-27 18:43:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:43:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:43:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 217 transitions. [2024-06-27 18:43:27,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636752136752137 [2024-06-27 18:43:27,791 INFO L175 Difference]: Start difference. First operand has 288 places, 511 transitions, 9751 flow. Second operand 13 states and 217 transitions. [2024-06-27 18:43:27,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 568 transitions, 11448 flow [2024-06-27 18:43:28,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 568 transitions, 11322 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 18:43:28,945 INFO L231 Difference]: Finished difference. Result has 300 places, 526 transitions, 10310 flow [2024-06-27 18:43:28,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=9632, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10310, PETRI_PLACES=300, PETRI_TRANSITIONS=526} [2024-06-27 18:43:28,946 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 260 predicate places. [2024-06-27 18:43:28,946 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 526 transitions, 10310 flow [2024-06-27 18:43:28,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:28,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:28,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:28,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:43:28,946 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:28,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:28,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1258437649, now seen corresponding path program 14 times [2024-06-27 18:43:28,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:28,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564777434] [2024-06-27 18:43:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:28,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:29,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564777434] [2024-06-27 18:43:29,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564777434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:29,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:29,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:43:29,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121125393] [2024-06-27 18:43:29,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:29,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:43:29,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:43:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:43:29,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:29,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 526 transitions, 10310 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:29,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:29,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:29,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:32,439 INFO L124 PetriNetUnfolderBase]: 5266/11798 cut-off events. [2024-06-27 18:43:32,439 INFO L125 PetriNetUnfolderBase]: For 148969/148976 co-relation queries the response was YES. [2024-06-27 18:43:32,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54516 conditions, 11798 events. 5266/11798 cut-off events. For 148969/148976 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 120083 event pairs, 2807 based on Foata normal form. 15/10873 useless extension candidates. Maximal degree in co-relation 54376. Up to 8835 conditions per place. [2024-06-27 18:43:32,588 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 433 selfloop transitions, 132 changer transitions 0/573 dead transitions. [2024-06-27 18:43:32,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 573 transitions, 11700 flow [2024-06-27 18:43:32,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:43:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:43:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 208 transitions. [2024-06-27 18:43:32,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 18:43:32,589 INFO L175 Difference]: Start difference. First operand has 300 places, 526 transitions, 10310 flow. Second operand 12 states and 208 transitions. [2024-06-27 18:43:32,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 573 transitions, 11700 flow [2024-06-27 18:43:33,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 573 transitions, 11448 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 18:43:33,770 INFO L231 Difference]: Finished difference. Result has 306 places, 527 transitions, 10358 flow [2024-06-27 18:43:33,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=10058, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10358, PETRI_PLACES=306, PETRI_TRANSITIONS=527} [2024-06-27 18:43:33,770 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 266 predicate places. [2024-06-27 18:43:33,770 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 527 transitions, 10358 flow [2024-06-27 18:43:33,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:33,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:33,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:33,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:43:33,771 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:33,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1035717149, now seen corresponding path program 15 times [2024-06-27 18:43:33,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:33,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509604122] [2024-06-27 18:43:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:33,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:34,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:34,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509604122] [2024-06-27 18:43:34,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509604122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:34,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:34,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:43:34,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381942690] [2024-06-27 18:43:34,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:34,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:43:34,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:34,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:43:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:43:34,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:34,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 527 transitions, 10358 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:34,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:34,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:34,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:37,150 INFO L124 PetriNetUnfolderBase]: 5253/11713 cut-off events. [2024-06-27 18:43:37,151 INFO L125 PetriNetUnfolderBase]: For 136456/136457 co-relation queries the response was YES. [2024-06-27 18:43:37,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53817 conditions, 11713 events. 5253/11713 cut-off events. For 136456/136457 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 118972 event pairs, 2802 based on Foata normal form. 11/10778 useless extension candidates. Maximal degree in co-relation 53675. Up to 9264 conditions per place. [2024-06-27 18:43:37,316 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 424 selfloop transitions, 139 changer transitions 0/571 dead transitions. [2024-06-27 18:43:37,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 571 transitions, 11745 flow [2024-06-27 18:43:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:43:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:43:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-27 18:43:37,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2024-06-27 18:43:37,317 INFO L175 Difference]: Start difference. First operand has 306 places, 527 transitions, 10358 flow. Second operand 12 states and 203 transitions. [2024-06-27 18:43:37,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 571 transitions, 11745 flow [2024-06-27 18:43:38,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 571 transitions, 11502 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:43:38,927 INFO L231 Difference]: Finished difference. Result has 311 places, 530 transitions, 10465 flow [2024-06-27 18:43:38,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=10115, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10465, PETRI_PLACES=311, PETRI_TRANSITIONS=530} [2024-06-27 18:43:38,928 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 271 predicate places. [2024-06-27 18:43:38,928 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 530 transitions, 10465 flow [2024-06-27 18:43:38,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:38,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:38,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:38,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:43:38,928 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:38,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:38,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2024373941, now seen corresponding path program 1 times [2024-06-27 18:43:38,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:38,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382854515] [2024-06-27 18:43:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:38,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:39,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:39,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382854515] [2024-06-27 18:43:39,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382854515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:39,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:39,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:43:39,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546682946] [2024-06-27 18:43:39,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:39,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:43:39,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:39,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:43:39,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:43:39,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:39,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 530 transitions, 10465 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:39,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:39,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:39,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:43,002 INFO L124 PetriNetUnfolderBase]: 5277/11862 cut-off events. [2024-06-27 18:43:43,002 INFO L125 PetriNetUnfolderBase]: For 122241/122248 co-relation queries the response was YES. [2024-06-27 18:43:43,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53998 conditions, 11862 events. 5277/11862 cut-off events. For 122241/122248 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 121121 event pairs, 2845 based on Foata normal form. 15/10934 useless extension candidates. Maximal degree in co-relation 53853. Up to 8699 conditions per place. [2024-06-27 18:43:43,131 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 440 selfloop transitions, 132 changer transitions 0/580 dead transitions. [2024-06-27 18:43:43,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 580 transitions, 11896 flow [2024-06-27 18:43:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:43:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:43:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 232 transitions. [2024-06-27 18:43:43,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 18:43:43,132 INFO L175 Difference]: Start difference. First operand has 311 places, 530 transitions, 10465 flow. Second operand 14 states and 232 transitions. [2024-06-27 18:43:43,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 580 transitions, 11896 flow [2024-06-27 18:43:44,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 580 transitions, 11619 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 18:43:44,338 INFO L231 Difference]: Finished difference. Result has 317 places, 530 transitions, 10456 flow [2024-06-27 18:43:44,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=10188, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10456, PETRI_PLACES=317, PETRI_TRANSITIONS=530} [2024-06-27 18:43:44,338 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 277 predicate places. [2024-06-27 18:43:44,339 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 530 transitions, 10456 flow [2024-06-27 18:43:44,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:44,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:44,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:44,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:43:44,339 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:44,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:44,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1216375185, now seen corresponding path program 16 times [2024-06-27 18:43:44,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:44,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097818130] [2024-06-27 18:43:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:44,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:45,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:45,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097818130] [2024-06-27 18:43:45,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097818130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:45,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:45,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:43:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173757263] [2024-06-27 18:43:45,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:45,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:43:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:43:45,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:43:45,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:45,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 530 transitions, 10456 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:45,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:45,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:45,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:48,155 INFO L124 PetriNetUnfolderBase]: 5505/12370 cut-off events. [2024-06-27 18:43:48,155 INFO L125 PetriNetUnfolderBase]: For 129058/129062 co-relation queries the response was YES. [2024-06-27 18:43:48,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55878 conditions, 12370 events. 5505/12370 cut-off events. For 129058/129062 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 127132 event pairs, 2796 based on Foata normal form. 14/11404 useless extension candidates. Maximal degree in co-relation 55732. Up to 8598 conditions per place. [2024-06-27 18:43:48,287 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 208 selfloop transitions, 363 changer transitions 0/579 dead transitions. [2024-06-27 18:43:48,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 579 transitions, 12126 flow [2024-06-27 18:43:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:43:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:43:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 18:43:48,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-27 18:43:48,288 INFO L175 Difference]: Start difference. First operand has 317 places, 530 transitions, 10456 flow. Second operand 11 states and 184 transitions. [2024-06-27 18:43:48,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 579 transitions, 12126 flow [2024-06-27 18:43:49,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 579 transitions, 11968 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 18:43:49,505 INFO L231 Difference]: Finished difference. Result has 321 places, 540 transitions, 11230 flow [2024-06-27 18:43:49,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=10298, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11230, PETRI_PLACES=321, PETRI_TRANSITIONS=540} [2024-06-27 18:43:49,505 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 281 predicate places. [2024-06-27 18:43:49,506 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 540 transitions, 11230 flow [2024-06-27 18:43:49,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:49,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:49,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:49,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:43:49,506 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:49,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1639716977, now seen corresponding path program 17 times [2024-06-27 18:43:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:49,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446143533] [2024-06-27 18:43:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:50,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446143533] [2024-06-27 18:43:50,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446143533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:50,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:50,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:43:50,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033181833] [2024-06-27 18:43:50,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:50,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:43:50,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:43:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:43:50,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:50,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 540 transitions, 11230 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:50,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:50,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:50,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:53,634 INFO L124 PetriNetUnfolderBase]: 5582/12596 cut-off events. [2024-06-27 18:43:53,634 INFO L125 PetriNetUnfolderBase]: For 131964/131968 co-relation queries the response was YES. [2024-06-27 18:43:53,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57360 conditions, 12596 events. 5582/12596 cut-off events. For 131964/131968 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 129842 event pairs, 3473 based on Foata normal form. 9/11632 useless extension candidates. Maximal degree in co-relation 57213. Up to 8143 conditions per place. [2024-06-27 18:43:53,934 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 324 selfloop transitions, 272 changer transitions 0/604 dead transitions. [2024-06-27 18:43:53,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 604 transitions, 13083 flow [2024-06-27 18:43:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:43:53,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:43:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 215 transitions. [2024-06-27 18:43:53,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594017094017094 [2024-06-27 18:43:53,935 INFO L175 Difference]: Start difference. First operand has 321 places, 540 transitions, 11230 flow. Second operand 13 states and 215 transitions. [2024-06-27 18:43:53,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 604 transitions, 13083 flow [2024-06-27 18:43:55,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 604 transitions, 12645 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 18:43:55,183 INFO L231 Difference]: Finished difference. Result has 329 places, 547 transitions, 11551 flow [2024-06-27 18:43:55,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=10800, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11551, PETRI_PLACES=329, PETRI_TRANSITIONS=547} [2024-06-27 18:43:55,184 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 289 predicate places. [2024-06-27 18:43:55,184 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 547 transitions, 11551 flow [2024-06-27 18:43:55,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:55,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:55,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:55,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:43:55,184 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:55,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:55,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1475539575, now seen corresponding path program 18 times [2024-06-27 18:43:55,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:55,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359689333] [2024-06-27 18:43:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:55,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:55,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359689333] [2024-06-27 18:43:55,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359689333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:55,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:55,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:43:55,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953791462] [2024-06-27 18:43:55,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:55,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:43:55,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:43:55,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:43:56,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:43:56,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 547 transitions, 11551 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:56,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:56,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:43:56,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:59,318 INFO L124 PetriNetUnfolderBase]: 5815/13000 cut-off events. [2024-06-27 18:43:59,318 INFO L125 PetriNetUnfolderBase]: For 141593/141600 co-relation queries the response was YES. [2024-06-27 18:43:59,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59466 conditions, 13000 events. 5815/13000 cut-off events. For 141593/141600 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 134614 event pairs, 3182 based on Foata normal form. 17/11995 useless extension candidates. Maximal degree in co-relation 59316. Up to 10036 conditions per place. [2024-06-27 18:43:59,461 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 409 selfloop transitions, 176 changer transitions 0/593 dead transitions. [2024-06-27 18:43:59,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 593 transitions, 13185 flow [2024-06-27 18:43:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:43:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:43:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 18:43:59,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 18:43:59,462 INFO L175 Difference]: Start difference. First operand has 329 places, 547 transitions, 11551 flow. Second operand 10 states and 170 transitions. [2024-06-27 18:43:59,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 593 transitions, 13185 flow [2024-06-27 18:44:00,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 593 transitions, 12833 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:44:00,834 INFO L231 Difference]: Finished difference. Result has 332 places, 559 transitions, 11862 flow [2024-06-27 18:44:00,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=11207, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11862, PETRI_PLACES=332, PETRI_TRANSITIONS=559} [2024-06-27 18:44:00,834 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 292 predicate places. [2024-06-27 18:44:00,834 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 559 transitions, 11862 flow [2024-06-27 18:44:00,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:00,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:00,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:00,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:44:00,835 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:00,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:00,835 INFO L85 PathProgramCache]: Analyzing trace with hash 32200441, now seen corresponding path program 19 times [2024-06-27 18:44:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:00,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760901868] [2024-06-27 18:44:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:00,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:01,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:01,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760901868] [2024-06-27 18:44:01,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760901868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:01,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:01,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:44:01,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411423449] [2024-06-27 18:44:01,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:01,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:44:01,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:44:01,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:44:01,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:44:01,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 559 transitions, 11862 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:01,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:01,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:44:01,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:04,821 INFO L124 PetriNetUnfolderBase]: 5802/12974 cut-off events. [2024-06-27 18:44:04,821 INFO L125 PetriNetUnfolderBase]: For 123726/123733 co-relation queries the response was YES. [2024-06-27 18:44:04,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58817 conditions, 12974 events. 5802/12974 cut-off events. For 123726/123733 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 134367 event pairs, 3160 based on Foata normal form. 17/11969 useless extension candidates. Maximal degree in co-relation 58665. Up to 9959 conditions per place. [2024-06-27 18:44:04,977 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 385 selfloop transitions, 200 changer transitions 0/593 dead transitions. [2024-06-27 18:44:04,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 593 transitions, 13230 flow [2024-06-27 18:44:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:44:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:44:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 18:44:04,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 18:44:04,979 INFO L175 Difference]: Start difference. First operand has 332 places, 559 transitions, 11862 flow. Second operand 10 states and 171 transitions. [2024-06-27 18:44:04,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 593 transitions, 13230 flow [2024-06-27 18:44:06,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 593 transitions, 12821 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 18:44:06,362 INFO L231 Difference]: Finished difference. Result has 334 places, 559 transitions, 11867 flow [2024-06-27 18:44:06,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=11453, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11867, PETRI_PLACES=334, PETRI_TRANSITIONS=559} [2024-06-27 18:44:06,363 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 294 predicate places. [2024-06-27 18:44:06,363 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 559 transitions, 11867 flow [2024-06-27 18:44:06,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:06,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:06,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:06,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:44:06,363 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:06,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:06,364 INFO L85 PathProgramCache]: Analyzing trace with hash 596615629, now seen corresponding path program 20 times [2024-06-27 18:44:06,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:06,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979972975] [2024-06-27 18:44:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:06,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:07,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:07,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979972975] [2024-06-27 18:44:07,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979972975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:07,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:07,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:44:07,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752754936] [2024-06-27 18:44:07,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:07,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:44:07,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:44:07,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:44:07,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:44:07,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 559 transitions, 11867 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:07,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:07,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:44:07,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:10,821 INFO L124 PetriNetUnfolderBase]: 6595/14745 cut-off events. [2024-06-27 18:44:10,821 INFO L125 PetriNetUnfolderBase]: For 137857/137861 co-relation queries the response was YES. [2024-06-27 18:44:10,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65219 conditions, 14745 events. 6595/14745 cut-off events. For 137857/137861 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 156483 event pairs, 4303 based on Foata normal form. 9/13705 useless extension candidates. Maximal degree in co-relation 65066. Up to 8471 conditions per place. [2024-06-27 18:44:11,018 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 353 selfloop transitions, 262 changer transitions 0/623 dead transitions. [2024-06-27 18:44:11,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 623 transitions, 13830 flow [2024-06-27 18:44:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:44:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:44:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 18:44:11,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-27 18:44:11,025 INFO L175 Difference]: Start difference. First operand has 334 places, 559 transitions, 11867 flow. Second operand 10 states and 186 transitions. [2024-06-27 18:44:11,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 623 transitions, 13830 flow [2024-06-27 18:44:13,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 623 transitions, 13088 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 18:44:13,098 INFO L231 Difference]: Finished difference. Result has 337 places, 566 transitions, 11935 flow [2024-06-27 18:44:13,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=11125, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11935, PETRI_PLACES=337, PETRI_TRANSITIONS=566} [2024-06-27 18:44:13,098 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 297 predicate places. [2024-06-27 18:44:13,098 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 566 transitions, 11935 flow [2024-06-27 18:44:13,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:13,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:13,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:13,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 18:44:13,099 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:13,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:13,099 INFO L85 PathProgramCache]: Analyzing trace with hash 596735599, now seen corresponding path program 21 times [2024-06-27 18:44:13,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:13,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764288356] [2024-06-27 18:44:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:13,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:13,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:13,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764288356] [2024-06-27 18:44:13,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764288356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:13,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:13,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:44:13,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388763329] [2024-06-27 18:44:13,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:13,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:44:13,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:13,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:44:13,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:44:13,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:44:13,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 566 transitions, 11935 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:13,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:13,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:44:13,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:17,641 INFO L124 PetriNetUnfolderBase]: 6666/15144 cut-off events. [2024-06-27 18:44:17,641 INFO L125 PetriNetUnfolderBase]: For 142846/142847 co-relation queries the response was YES. [2024-06-27 18:44:17,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66299 conditions, 15144 events. 6666/15144 cut-off events. For 142846/142847 co-relation queries the response was YES. Maximal size of possible extension queue 1089. Compared 162722 event pairs, 3911 based on Foata normal form. 11/14002 useless extension candidates. Maximal degree in co-relation 66143. Up to 11303 conditions per place. [2024-06-27 18:44:17,996 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 316 selfloop transitions, 291 changer transitions 0/615 dead transitions. [2024-06-27 18:44:17,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 615 transitions, 13463 flow [2024-06-27 18:44:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:44:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:44:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-27 18:44:17,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47685185185185186 [2024-06-27 18:44:17,997 INFO L175 Difference]: Start difference. First operand has 337 places, 566 transitions, 11935 flow. Second operand 12 states and 206 transitions. [2024-06-27 18:44:17,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 615 transitions, 13463 flow [2024-06-27 18:44:19,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 615 transitions, 13218 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 18:44:19,651 INFO L231 Difference]: Finished difference. Result has 344 places, 567 transitions, 12317 flow [2024-06-27 18:44:19,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=11690, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12317, PETRI_PLACES=344, PETRI_TRANSITIONS=567} [2024-06-27 18:44:19,651 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 304 predicate places. [2024-06-27 18:44:19,651 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 567 transitions, 12317 flow [2024-06-27 18:44:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:19,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:19,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:19,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 18:44:19,652 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:19,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:19,652 INFO L85 PathProgramCache]: Analyzing trace with hash 596730949, now seen corresponding path program 22 times [2024-06-27 18:44:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:19,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119019293] [2024-06-27 18:44:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:19,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:20,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119019293] [2024-06-27 18:44:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119019293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:20,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:20,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:44:20,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028021617] [2024-06-27 18:44:20,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:20,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:44:20,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:44:20,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:44:20,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:44:20,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 567 transitions, 12317 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:20,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:20,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:44:20,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:24,415 INFO L124 PetriNetUnfolderBase]: 6852/15544 cut-off events. [2024-06-27 18:44:24,415 INFO L125 PetriNetUnfolderBase]: For 145273/145274 co-relation queries the response was YES. [2024-06-27 18:44:24,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68744 conditions, 15544 events. 6852/15544 cut-off events. For 145273/145274 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 167593 event pairs, 3850 based on Foata normal form. 9/14359 useless extension candidates. Maximal degree in co-relation 68587. Up to 11467 conditions per place. [2024-06-27 18:44:24,769 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 295 selfloop transitions, 326 changer transitions 0/629 dead transitions. [2024-06-27 18:44:24,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 629 transitions, 14239 flow [2024-06-27 18:44:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:44:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:44:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 18:44:24,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-27 18:44:24,770 INFO L175 Difference]: Start difference. First operand has 344 places, 567 transitions, 12317 flow. Second operand 10 states and 186 transitions. [2024-06-27 18:44:24,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 629 transitions, 14239 flow [2024-06-27 18:44:26,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 629 transitions, 13640 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-27 18:44:26,724 INFO L231 Difference]: Finished difference. Result has 344 places, 578 transitions, 12640 flow [2024-06-27 18:44:26,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=11738, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12640, PETRI_PLACES=344, PETRI_TRANSITIONS=578} [2024-06-27 18:44:26,725 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 304 predicate places. [2024-06-27 18:44:26,725 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 578 transitions, 12640 flow [2024-06-27 18:44:26,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:26,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:26,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:26,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 18:44:26,725 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:26,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash 767433379, now seen corresponding path program 23 times [2024-06-27 18:44:26,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:26,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17484335] [2024-06-27 18:44:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:26,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:27,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:27,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17484335] [2024-06-27 18:44:27,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17484335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:27,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:27,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:44:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153427461] [2024-06-27 18:44:27,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:27,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:44:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:44:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:44:27,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-06-27 18:44:27,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 578 transitions, 12640 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:27,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:27,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-06-27 18:44:27,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand