./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe023_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/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe023_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:26:05,004 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:26:05,054 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:26:05,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:26:05,062 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:26:05,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:26:05,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:26:05,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:26:05,082 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:26:05,085 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:26:05,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:26:05,085 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:26:05,086 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:26:05,087 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:26:05,087 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:26:05,087 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:26:05,088 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:26:05,088 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:26:05,088 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:26:05,088 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:26:05,088 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:26:05,089 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:26:05,089 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:26:05,089 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:26:05,089 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:26:05,090 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:26:05,090 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:26:05,090 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:26:05,091 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:26:05,091 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:26:05,092 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:26:05,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:26:05,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:26:05,092 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:26:05,093 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:26:05,093 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:26:05,093 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:26:05,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:26:05,093 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:26:05,094 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:26:05,094 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:26:05,094 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:26:05,094 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:26:05,095 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:26:05,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:26:05,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:26:05,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:26:05,308 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:26:05,309 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:26:05,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 21:26:05,430 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:26:05,430 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:26:05,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 21:26:06,446 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:26:06,687 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:26:06,690 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 21:26:06,708 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09587a392/427f36b1a29b42a3ba33372422d10ed2/FLAGf05d7051b [2024-06-27 21:26:06,720 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09587a392/427f36b1a29b42a3ba33372422d10ed2 [2024-06-27 21:26:06,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:26:06,722 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:26:06,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:26:06,724 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:26:06,728 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:26:06,728 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:05" (1/2) ... [2024-06-27 21:26:06,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd01b74 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:06, skipping insertion in model container [2024-06-27 21:26:06,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:05" (1/2) ... [2024-06-27 21:26:06,731 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e1a6993 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:06, skipping insertion in model container [2024-06-27 21:26:06,731 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:26:06" (2/2) ... [2024-06-27 21:26:06,732 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd01b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:06, skipping insertion in model container [2024-06-27 21:26:06,732 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:26:06" (2/2) ... [2024-06-27 21:26:06,732 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:26:06,807 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:26:06,809 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-27 21:26:06,809 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-27 21:26:06,809 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] (((((((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-27 21:26:06,809 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:26:06,809 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-27 21:26:06,844 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:26:07,170 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:26:07,179 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:26:07,387 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:26:07,456 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:26:07,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07 WrapperNode [2024-06-27 21:26:07,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:26:07,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:26:07,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:26:07,459 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:26:07,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,522 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-27 21:26:07,522 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:26:07,523 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:26:07,523 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:26:07,523 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:26:07,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,545 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,562 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 21:26:07,567 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,568 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,583 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,595 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:26:07,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:26:07,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:26:07,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:26:07,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (1/1) ... [2024-06-27 21:26:07,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:26:07,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:26:07,625 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 21:26:07,642 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 21:26:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:26:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:26:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:26:07,655 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:26:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:26:07,656 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:26:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:26:07,656 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:26:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:26:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:26:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:26:07,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:26:07,657 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 21:26:07,790 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:26:07,792 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:26:08,135 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:26:08,135 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:26:08,302 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:26:08,303 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:26:08,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:26:08 BoogieIcfgContainer [2024-06-27 21:26:08,303 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:26:08,305 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:26:08,306 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:26:08,308 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:26:08,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:05" (1/4) ... [2024-06-27 21:26:08,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152917e6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:26:08, skipping insertion in model container [2024-06-27 21:26:08,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:26:06" (2/4) ... [2024-06-27 21:26:08,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152917e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:26:08, skipping insertion in model container [2024-06-27 21:26:08,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:07" (3/4) ... [2024-06-27 21:26:08,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152917e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:26:08, skipping insertion in model container [2024-06-27 21:26:08,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:26:08" (4/4) ... [2024-06-27 21:26:08,311 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 21:26:08,324 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:26:08,324 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:26:08,324 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:26:08,371 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:26:08,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:26:08,429 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 21:26:08,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:26:08,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:26:08,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:26:08,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 21:26:08,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:26:08,454 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;@61512d9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:26:08,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:26:08,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:26:08,457 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 21:26:08,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:26:08,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:08,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:26:08,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:08,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:08,462 INFO L85 PathProgramCache]: Analyzing trace with hash 448401460, now seen corresponding path program 1 times [2024-06-27 21:26:08,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:08,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483432744] [2024-06-27 21:26:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:08,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:09,286 INFO 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 21:26:09,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:09,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483432744] [2024-06-27 21:26:09,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483432744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:09,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:09,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:26:09,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871692329] [2024-06-27 21:26:09,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:09,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:26:09,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:26:09,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:26:09,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:09,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 21:26:09,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:09,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:09,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:09,741 INFO L124 PetriNetUnfolderBase]: 1656/2483 cut-off events. [2024-06-27 21:26:09,741 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-27 21:26:09,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5066 conditions, 2483 events. 1656/2483 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11929 event pairs, 955 based on Foata normal form. 3/2436 useless extension candidates. Maximal degree in co-relation 5054. Up to 2464 conditions per place. [2024-06-27 21:26:09,755 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 21:26:09,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 181 flow [2024-06-27 21:26:09,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:26:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:26:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 21:26:09,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 21:26:09,765 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-27 21:26:09,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 181 flow [2024-06-27 21:26:09,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:09,769 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 21:26:09,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 21:26:09,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 21:26:09,773 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 21:26:09,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 21:26:09,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:09,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:09,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:26:09,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:09,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:09,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1417181037, now seen corresponding path program 1 times [2024-06-27 21:26:09,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:09,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618705022] [2024-06-27 21:26:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:09,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:10,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:10,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618705022] [2024-06-27 21:26:10,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618705022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:10,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:10,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:26:10,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136785029] [2024-06-27 21:26:10,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:10,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:26:10,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:26:10,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:26:10,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:10,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 21:26:10,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:10,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:10,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:10,496 INFO L124 PetriNetUnfolderBase]: 1644/2465 cut-off events. [2024-06-27 21:26:10,512 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2024-06-27 21:26:10,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5664 conditions, 2465 events. 1644/2465 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11400 event pairs, 941 based on Foata normal form. 6/2469 useless extension candidates. Maximal degree in co-relation 5652. Up to 2422 conditions per place. [2024-06-27 21:26:10,531 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 44 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-27 21:26:10,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 260 flow [2024-06-27 21:26:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:26:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:26:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-27 21:26:10,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-27 21:26:10,532 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 91 transitions. [2024-06-27 21:26:10,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 260 flow [2024-06-27 21:26:10,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:26:10,534 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-27 21:26:10,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-27 21:26:10,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-27 21:26:10,535 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-27 21:26:10,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 21:26:10,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:10,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:10,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:26:10,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:10,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash 406366796, now seen corresponding path program 1 times [2024-06-27 21:26:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:10,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996856352] [2024-06-27 21:26:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:10,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:11,758 INFO 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 21:26:11,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:11,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996856352] [2024-06-27 21:26:11,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996856352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:11,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:11,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:26:11,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702168761] [2024-06-27 21:26:11,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:11,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:26:11,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:11,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:26:11,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:26:11,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:11,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:26:11,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:11,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:11,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:12,210 INFO L124 PetriNetUnfolderBase]: 1632/2447 cut-off events. [2024-06-27 21:26:12,210 INFO L125 PetriNetUnfolderBase]: For 1179/1187 co-relation queries the response was YES. [2024-06-27 21:26:12,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6246 conditions, 2447 events. 1632/2447 cut-off events. For 1179/1187 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11281 event pairs, 691 based on Foata normal form. 12/2457 useless extension candidates. Maximal degree in co-relation 6231. Up to 2374 conditions per place. [2024-06-27 21:26:12,220 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-06-27 21:26:12,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 67 transitions, 346 flow [2024-06-27 21:26:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:26:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:26:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-27 21:26:12,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-27 21:26:12,222 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 112 transitions. [2024-06-27 21:26:12,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 67 transitions, 346 flow [2024-06-27 21:26:12,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 344 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 21:26:12,224 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 198 flow [2024-06-27 21:26:12,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 21:26:12,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-27 21:26:12,225 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 198 flow [2024-06-27 21:26:12,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:26:12,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:12,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:12,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:26:12,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:12,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:12,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1279329996, now seen corresponding path program 1 times [2024-06-27 21:26:12,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:12,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408324344] [2024-06-27 21:26:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:12,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:12,686 INFO 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 21:26:12,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:12,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408324344] [2024-06-27 21:26:12,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408324344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:12,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:12,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:26:12,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838659099] [2024-06-27 21:26:12,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:12,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:26:12,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:12,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:26:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:26:12,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:12,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 21:26:12,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:12,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:12,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:13,079 INFO L124 PetriNetUnfolderBase]: 1637/2454 cut-off events. [2024-06-27 21:26:13,080 INFO L125 PetriNetUnfolderBase]: For 2152/2160 co-relation queries the response was YES. [2024-06-27 21:26:13,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6883 conditions, 2454 events. 1637/2454 cut-off events. For 2152/2160 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11187 event pairs, 881 based on Foata normal form. 10/2462 useless extension candidates. Maximal degree in co-relation 6864. Up to 2426 conditions per place. [2024-06-27 21:26:13,092 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-27 21:26:13,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 356 flow [2024-06-27 21:26:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:26:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:26:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 21:26:13,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-27 21:26:13,094 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 198 flow. Second operand 5 states and 89 transitions. [2024-06-27 21:26:13,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 356 flow [2024-06-27 21:26:13,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 334 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:13,096 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 216 flow [2024-06-27 21:26:13,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 21:26:13,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-27 21:26:13,097 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 216 flow [2024-06-27 21:26:13,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 21:26:13,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:13,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:13,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:26:13,098 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:13,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:13,099 INFO L85 PathProgramCache]: Analyzing trace with hash -323507925, now seen corresponding path program 1 times [2024-06-27 21:26:13,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:13,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011196562] [2024-06-27 21:26:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:13,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:14,506 INFO 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 21:26:14,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:14,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011196562] [2024-06-27 21:26:14,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011196562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:14,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:14,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:14,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592634595] [2024-06-27 21:26:14,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:14,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:14,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:14,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:14,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:14,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:14,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 216 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 21:26:14,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:14,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:14,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:15,083 INFO L124 PetriNetUnfolderBase]: 1628/2439 cut-off events. [2024-06-27 21:26:15,084 INFO L125 PetriNetUnfolderBase]: For 3035/3043 co-relation queries the response was YES. [2024-06-27 21:26:15,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7377 conditions, 2439 events. 1628/2439 cut-off events. For 3035/3043 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11125 event pairs, 541 based on Foata normal form. 12/2449 useless extension candidates. Maximal degree in co-relation 7357. Up to 2336 conditions per place. [2024-06-27 21:26:15,095 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-27 21:26:15,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 434 flow [2024-06-27 21:26:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 21:26:15,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-27 21:26:15,097 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 216 flow. Second operand 6 states and 128 transitions. [2024-06-27 21:26:15,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 434 flow [2024-06-27 21:26:15,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 418 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:15,100 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 241 flow [2024-06-27 21:26:15,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-27 21:26:15,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-27 21:26:15,101 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 241 flow [2024-06-27 21:26:15,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 21:26:15,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:15,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:15,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:26:15,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:15,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1037593549, now seen corresponding path program 1 times [2024-06-27 21:26:15,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:15,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987085673] [2024-06-27 21:26:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:15,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:15,596 INFO 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 21:26:15,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:15,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987085673] [2024-06-27 21:26:15,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987085673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:15,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:15,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:26:15,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125327560] [2024-06-27 21:26:15,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:15,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:26:15,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:15,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:26:15,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:26:15,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:15,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 21:26:15,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:15,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:15,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:16,051 INFO L124 PetriNetUnfolderBase]: 1897/2823 cut-off events. [2024-06-27 21:26:16,052 INFO L125 PetriNetUnfolderBase]: For 4920/4920 co-relation queries the response was YES. [2024-06-27 21:26:16,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8911 conditions, 2823 events. 1897/2823 cut-off events. For 4920/4920 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12945 event pairs, 1022 based on Foata normal form. 2/2824 useless extension candidates. Maximal degree in co-relation 8890. Up to 2793 conditions per place. [2024-06-27 21:26:16,070 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-27 21:26:16,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 460 flow [2024-06-27 21:26:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-27 21:26:16,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:26:16,072 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 241 flow. Second operand 6 states and 96 transitions. [2024-06-27 21:26:16,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 460 flow [2024-06-27 21:26:16,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 425 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:16,077 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 301 flow [2024-06-27 21:26:16,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=301, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-27 21:26:16,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-27 21:26:16,079 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 301 flow [2024-06-27 21:26:16,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 21:26:16,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:16,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:16,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:26:16,080 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:16,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:16,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1068846827, now seen corresponding path program 1 times [2024-06-27 21:26:16,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:16,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669082368] [2024-06-27 21:26:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:16,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:16,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:16,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669082368] [2024-06-27 21:26:16,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669082368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:16,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:16,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:26:16,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780628991] [2024-06-27 21:26:16,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:16,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:26:16,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:16,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:26:16,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:26:16,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:16,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 21:26:16,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:16,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:16,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:17,070 INFO L124 PetriNetUnfolderBase]: 1827/2735 cut-off events. [2024-06-27 21:26:17,071 INFO L125 PetriNetUnfolderBase]: For 6677/6727 co-relation queries the response was YES. [2024-06-27 21:26:17,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9337 conditions, 2735 events. 1827/2735 cut-off events. For 6677/6727 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12555 event pairs, 801 based on Foata normal form. 15/2738 useless extension candidates. Maximal degree in co-relation 9312. Up to 2659 conditions per place. [2024-06-27 21:26:17,086 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 16 changer transitions 0/82 dead transitions. [2024-06-27 21:26:17,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 527 flow [2024-06-27 21:26:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:17,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:26:17,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:26:17,089 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 301 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:26:17,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 527 flow [2024-06-27 21:26:17,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 521 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 21:26:17,095 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 376 flow [2024-06-27 21:26:17,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-06-27 21:26:17,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-27 21:26:17,098 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 376 flow [2024-06-27 21:26:17,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 21:26:17,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:17,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:17,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:26:17,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:17,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:17,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1075513067, now seen corresponding path program 2 times [2024-06-27 21:26:17,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:17,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36154106] [2024-06-27 21:26:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:17,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:17,583 INFO 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 21:26:17,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:17,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36154106] [2024-06-27 21:26:17,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36154106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:17,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:17,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:26:17,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480051447] [2024-06-27 21:26:17,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:17,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:26:17,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:17,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:26:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:26:17,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:17,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 21:26:17,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:17,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:17,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:18,033 INFO L124 PetriNetUnfolderBase]: 1871/2801 cut-off events. [2024-06-27 21:26:18,034 INFO L125 PetriNetUnfolderBase]: For 9213/9264 co-relation queries the response was YES. [2024-06-27 21:26:18,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10525 conditions, 2801 events. 1871/2801 cut-off events. For 9213/9264 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12924 event pairs, 782 based on Foata normal form. 18/2804 useless extension candidates. Maximal degree in co-relation 10496. Up to 2677 conditions per place. [2024-06-27 21:26:18,047 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 60 selfloop transitions, 23 changer transitions 0/90 dead transitions. [2024-06-27 21:26:18,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 90 transitions, 676 flow [2024-06-27 21:26:18,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 21:26:18,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:26:18,050 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 376 flow. Second operand 6 states and 108 transitions. [2024-06-27 21:26:18,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 90 transitions, 676 flow [2024-06-27 21:26:18,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 90 transitions, 653 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 21:26:18,055 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 488 flow [2024-06-27 21:26:18,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=488, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-27 21:26:18,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-27 21:26:18,056 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 488 flow [2024-06-27 21:26:18,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 21:26:18,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:18,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:18,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:26:18,057 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:18,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1075521995, now seen corresponding path program 1 times [2024-06-27 21:26:18,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:18,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330451379] [2024-06-27 21:26:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:18,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:18,700 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 21:26:18,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:18,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330451379] [2024-06-27 21:26:18,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330451379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:18,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:18,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:18,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142891106] [2024-06-27 21:26:18,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:18,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:18,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:18,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:18,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:18,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 488 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:26:18,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:18,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:18,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:19,248 INFO L124 PetriNetUnfolderBase]: 1960/2920 cut-off events. [2024-06-27 21:26:19,248 INFO L125 PetriNetUnfolderBase]: For 12046/12052 co-relation queries the response was YES. [2024-06-27 21:26:19,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11368 conditions, 2920 events. 1960/2920 cut-off events. For 12046/12052 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13404 event pairs, 737 based on Foata normal form. 10/2927 useless extension candidates. Maximal degree in co-relation 11336. Up to 2720 conditions per place. [2024-06-27 21:26:19,263 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 87 selfloop transitions, 26 changer transitions 0/116 dead transitions. [2024-06-27 21:26:19,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 116 transitions, 978 flow [2024-06-27 21:26:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:26:19,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 21:26:19,265 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 488 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:26:19,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 116 transitions, 978 flow [2024-06-27 21:26:19,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 116 transitions, 920 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:19,276 INFO L231 Difference]: Finished difference. Result has 77 places, 89 transitions, 675 flow [2024-06-27 21:26:19,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=77, PETRI_TRANSITIONS=89} [2024-06-27 21:26:19,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-27 21:26:19,277 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 89 transitions, 675 flow [2024-06-27 21:26:19,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:26:19,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:19,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:19,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:26:19,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:19,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:19,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1490896171, now seen corresponding path program 1 times [2024-06-27 21:26:19,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:19,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727604897] [2024-06-27 21:26:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:19,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:20,057 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 21:26:20,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:20,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727604897] [2024-06-27 21:26:20,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727604897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:20,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:20,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675540516] [2024-06-27 21:26:20,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:20,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:20,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:20,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 89 transitions, 675 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:26:20,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:20,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:20,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:20,629 INFO L124 PetriNetUnfolderBase]: 1962/2935 cut-off events. [2024-06-27 21:26:20,630 INFO L125 PetriNetUnfolderBase]: For 15060/15165 co-relation queries the response was YES. [2024-06-27 21:26:20,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12671 conditions, 2935 events. 1962/2935 cut-off events. For 15060/15165 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13766 event pairs, 680 based on Foata normal form. 2/2893 useless extension candidates. Maximal degree in co-relation 12635. Up to 2799 conditions per place. [2024-06-27 21:26:20,645 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-27 21:26:20,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 132 transitions, 1170 flow [2024-06-27 21:26:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:26:20,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:26:20,647 INFO L175 Difference]: Start difference. First operand has 77 places, 89 transitions, 675 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:26:20,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 132 transitions, 1170 flow [2024-06-27 21:26:20,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 132 transitions, 1150 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 21:26:20,659 INFO L231 Difference]: Finished difference. Result has 84 places, 109 transitions, 967 flow [2024-06-27 21:26:20,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=967, PETRI_PLACES=84, PETRI_TRANSITIONS=109} [2024-06-27 21:26:20,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-27 21:26:20,660 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 109 transitions, 967 flow [2024-06-27 21:26:20,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:26:20,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:20,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:20,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:26:20,661 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:20,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:20,661 INFO L85 PathProgramCache]: Analyzing trace with hash 687397127, now seen corresponding path program 2 times [2024-06-27 21:26:20,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:20,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92454390] [2024-06-27 21:26:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:20,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:21,459 INFO 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 21:26:21,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:21,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92454390] [2024-06-27 21:26:21,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92454390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:21,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:21,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:21,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052160831] [2024-06-27 21:26:21,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:21,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:21,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:21,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:21,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:21,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:21,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 109 transitions, 967 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:26:21,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:21,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:21,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:22,052 INFO L124 PetriNetUnfolderBase]: 1955/2926 cut-off events. [2024-06-27 21:26:22,053 INFO L125 PetriNetUnfolderBase]: For 17970/18061 co-relation queries the response was YES. [2024-06-27 21:26:22,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13078 conditions, 2926 events. 1955/2926 cut-off events. For 17970/18061 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13679 event pairs, 682 based on Foata normal form. 2/2887 useless extension candidates. Maximal degree in co-relation 13038. Up to 2759 conditions per place. [2024-06-27 21:26:22,069 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 74 selfloop transitions, 43 changer transitions 0/128 dead transitions. [2024-06-27 21:26:22,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 128 transitions, 1270 flow [2024-06-27 21:26:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:26:22,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:26:22,071 INFO L175 Difference]: Start difference. First operand has 84 places, 109 transitions, 967 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:26:22,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 128 transitions, 1270 flow [2024-06-27 21:26:22,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 1194 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:22,087 INFO L231 Difference]: Finished difference. Result has 86 places, 110 transitions, 1024 flow [2024-06-27 21:26:22,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1024, PETRI_PLACES=86, PETRI_TRANSITIONS=110} [2024-06-27 21:26:22,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-27 21:26:22,088 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 110 transitions, 1024 flow [2024-06-27 21:26:22,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:26:22,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:22,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:22,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:26:22,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:22,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:22,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1225485404, now seen corresponding path program 1 times [2024-06-27 21:26:22,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:22,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760406958] [2024-06-27 21:26:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:22,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:22,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:22,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760406958] [2024-06-27 21:26:22,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760406958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:22,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:22,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:22,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614221197] [2024-06-27 21:26:22,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:22,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:22,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:22,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:22,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:22,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:22,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 110 transitions, 1024 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:26:22,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:22,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:22,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:23,223 INFO L124 PetriNetUnfolderBase]: 2056/3062 cut-off events. [2024-06-27 21:26:23,223 INFO L125 PetriNetUnfolderBase]: For 20564/20575 co-relation queries the response was YES. [2024-06-27 21:26:23,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13791 conditions, 3062 events. 2056/3062 cut-off events. For 20564/20575 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14075 event pairs, 777 based on Foata normal form. 12/3071 useless extension candidates. Maximal degree in co-relation 13750. Up to 2929 conditions per place. [2024-06-27 21:26:23,242 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 116 selfloop transitions, 22 changer transitions 0/141 dead transitions. [2024-06-27 21:26:23,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 141 transitions, 1425 flow [2024-06-27 21:26:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:26:23,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-27 21:26:23,244 INFO L175 Difference]: Start difference. First operand has 86 places, 110 transitions, 1024 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:26:23,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 141 transitions, 1425 flow [2024-06-27 21:26:23,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 141 transitions, 1357 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:23,265 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 1074 flow [2024-06-27 21:26:23,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1074, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2024-06-27 21:26:23,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-27 21:26:23,266 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 1074 flow [2024-06-27 21:26:23,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:26:23,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:23,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:23,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:26:23,267 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:23,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1018831964, now seen corresponding path program 2 times [2024-06-27 21:26:23,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:23,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922981799] [2024-06-27 21:26:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:23,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:23,815 INFO 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 21:26:23,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:23,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922981799] [2024-06-27 21:26:23,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922981799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:23,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:23,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:23,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115070891] [2024-06-27 21:26:23,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:23,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:23,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:23,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:23,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:23,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 1074 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:26:23,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:23,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:23,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:24,367 INFO L124 PetriNetUnfolderBase]: 2094/3119 cut-off events. [2024-06-27 21:26:24,367 INFO L125 PetriNetUnfolderBase]: For 21443/21454 co-relation queries the response was YES. [2024-06-27 21:26:24,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14214 conditions, 3119 events. 2094/3119 cut-off events. For 21443/21454 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14379 event pairs, 789 based on Foata normal form. 12/3126 useless extension candidates. Maximal degree in co-relation 14170. Up to 2778 conditions per place. [2024-06-27 21:26:24,387 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 107 selfloop transitions, 42 changer transitions 0/152 dead transitions. [2024-06-27 21:26:24,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 152 transitions, 1625 flow [2024-06-27 21:26:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:26:24,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-27 21:26:24,389 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 1074 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:26:24,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 152 transitions, 1625 flow [2024-06-27 21:26:24,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 152 transitions, 1585 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:24,411 INFO L231 Difference]: Finished difference. Result has 96 places, 126 transitions, 1233 flow [2024-06-27 21:26:24,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1233, PETRI_PLACES=96, PETRI_TRANSITIONS=126} [2024-06-27 21:26:24,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-27 21:26:24,412 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 126 transitions, 1233 flow [2024-06-27 21:26:24,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:26:24,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:24,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:24,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:26:24,412 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:24,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1018565054, now seen corresponding path program 3 times [2024-06-27 21:26:24,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:24,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192804983] [2024-06-27 21:26:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:24,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:24,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:24,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192804983] [2024-06-27 21:26:24,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192804983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:24,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:24,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:24,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930273203] [2024-06-27 21:26:24,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:24,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:24,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:25,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:25,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 126 transitions, 1233 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:26:25,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:25,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:25,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:25,541 INFO L124 PetriNetUnfolderBase]: 2071/3086 cut-off events. [2024-06-27 21:26:25,541 INFO L125 PetriNetUnfolderBase]: For 25097/25108 co-relation queries the response was YES. [2024-06-27 21:26:25,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14768 conditions, 3086 events. 2071/3086 cut-off events. For 25097/25108 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14235 event pairs, 780 based on Foata normal form. 16/3097 useless extension candidates. Maximal degree in co-relation 14722. Up to 2763 conditions per place. [2024-06-27 21:26:25,558 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 102 selfloop transitions, 45 changer transitions 0/150 dead transitions. [2024-06-27 21:26:25,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 150 transitions, 1649 flow [2024-06-27 21:26:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:26:25,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-27 21:26:25,560 INFO L175 Difference]: Start difference. First operand has 96 places, 126 transitions, 1233 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:26:25,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 150 transitions, 1649 flow [2024-06-27 21:26:25,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 150 transitions, 1568 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:25,588 INFO L231 Difference]: Finished difference. Result has 100 places, 126 transitions, 1254 flow [2024-06-27 21:26:25,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1254, PETRI_PLACES=100, PETRI_TRANSITIONS=126} [2024-06-27 21:26:25,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-27 21:26:25,589 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 126 transitions, 1254 flow [2024-06-27 21:26:25,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:26:25,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:25,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:25,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:26:25,590 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:25,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:25,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1018555134, now seen corresponding path program 1 times [2024-06-27 21:26:25,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:25,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146675642] [2024-06-27 21:26:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:25,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:26,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:26,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146675642] [2024-06-27 21:26:26,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146675642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:26,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:26,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:26,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562588429] [2024-06-27 21:26:26,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:26,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:26,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:26,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:26,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:26,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:26,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 126 transitions, 1254 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:26:26,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:26,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:26,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:27,022 INFO L124 PetriNetUnfolderBase]: 2063/3071 cut-off events. [2024-06-27 21:26:27,022 INFO L125 PetriNetUnfolderBase]: For 27815/27815 co-relation queries the response was YES. [2024-06-27 21:26:27,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14936 conditions, 3071 events. 2063/3071 cut-off events. For 27815/27815 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14201 event pairs, 785 based on Foata normal form. 4/3074 useless extension candidates. Maximal degree in co-relation 14889. Up to 3009 conditions per place. [2024-06-27 21:26:27,041 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 135 selfloop transitions, 16 changer transitions 0/154 dead transitions. [2024-06-27 21:26:27,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 154 transitions, 1660 flow [2024-06-27 21:26:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:26:27,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:26:27,043 INFO L175 Difference]: Start difference. First operand has 100 places, 126 transitions, 1254 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:26:27,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 154 transitions, 1660 flow [2024-06-27 21:26:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1593 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:27,081 INFO L231 Difference]: Finished difference. Result has 105 places, 130 transitions, 1270 flow [2024-06-27 21:26:27,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1270, PETRI_PLACES=105, PETRI_TRANSITIONS=130} [2024-06-27 21:26:27,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-27 21:26:27,082 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 130 transitions, 1270 flow [2024-06-27 21:26:27,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:26:27,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:27,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:27,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:26:27,082 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:27,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 659890954, now seen corresponding path program 1 times [2024-06-27 21:26:27,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:27,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405464556] [2024-06-27 21:26:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:27,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:28,153 INFO 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 21:26:28,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:28,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405464556] [2024-06-27 21:26:28,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405464556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:28,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:28,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:28,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736113148] [2024-06-27 21:26:28,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:28,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:28,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:28,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:28,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:28,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:28,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 130 transitions, 1270 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:28,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:28,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:28,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:28,887 INFO L124 PetriNetUnfolderBase]: 2067/3101 cut-off events. [2024-06-27 21:26:28,887 INFO L125 PetriNetUnfolderBase]: For 34364/34403 co-relation queries the response was YES. [2024-06-27 21:26:28,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15698 conditions, 3101 events. 2067/3101 cut-off events. For 34364/34403 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14609 event pairs, 596 based on Foata normal form. 19/3038 useless extension candidates. Maximal degree in co-relation 15649. Up to 2844 conditions per place. [2024-06-27 21:26:28,906 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 113 selfloop transitions, 41 changer transitions 0/174 dead transitions. [2024-06-27 21:26:28,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 174 transitions, 1846 flow [2024-06-27 21:26:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:26:28,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 21:26:28,908 INFO L175 Difference]: Start difference. First operand has 105 places, 130 transitions, 1270 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:26:28,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 174 transitions, 1846 flow [2024-06-27 21:26:28,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 174 transitions, 1807 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:28,945 INFO L231 Difference]: Finished difference. Result has 111 places, 148 transitions, 1554 flow [2024-06-27 21:26:28,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1554, PETRI_PLACES=111, PETRI_TRANSITIONS=148} [2024-06-27 21:26:28,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-27 21:26:28,946 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 148 transitions, 1554 flow [2024-06-27 21:26:28,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:28,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:28,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:28,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:26:28,947 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:28,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2133130196, now seen corresponding path program 2 times [2024-06-27 21:26:28,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:28,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663793685] [2024-06-27 21:26:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:28,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:29,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663793685] [2024-06-27 21:26:29,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663793685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:29,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:29,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:29,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912357235] [2024-06-27 21:26:29,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:29,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:29,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:29,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:29,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 148 transitions, 1554 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:29,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:29,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:29,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:30,448 INFO L124 PetriNetUnfolderBase]: 2134/3204 cut-off events. [2024-06-27 21:26:30,448 INFO L125 PetriNetUnfolderBase]: For 40567/40646 co-relation queries the response was YES. [2024-06-27 21:26:30,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16991 conditions, 3204 events. 2134/3204 cut-off events. For 40567/40646 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15306 event pairs, 681 based on Foata normal form. 41/3165 useless extension candidates. Maximal degree in co-relation 16938. Up to 2906 conditions per place. [2024-06-27 21:26:30,469 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 117 selfloop transitions, 54 changer transitions 0/191 dead transitions. [2024-06-27 21:26:30,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 191 transitions, 2095 flow [2024-06-27 21:26:30,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:26:30,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 21:26:30,470 INFO L175 Difference]: Start difference. First operand has 111 places, 148 transitions, 1554 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:26:30,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 191 transitions, 2095 flow [2024-06-27 21:26:30,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 191 transitions, 2022 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 21:26:30,514 INFO L231 Difference]: Finished difference. Result has 118 places, 162 transitions, 1748 flow [2024-06-27 21:26:30,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1748, PETRI_PLACES=118, PETRI_TRANSITIONS=162} [2024-06-27 21:26:30,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-27 21:26:30,515 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 162 transitions, 1748 flow [2024-06-27 21:26:30,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:30,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:30,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:30,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:26:30,516 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:30,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1425429526, now seen corresponding path program 3 times [2024-06-27 21:26:30,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:30,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726523985] [2024-06-27 21:26:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:30,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:31,290 INFO 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 21:26:31,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:31,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726523985] [2024-06-27 21:26:31,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726523985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:31,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:31,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:31,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608666145] [2024-06-27 21:26:31,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:31,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:31,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:31,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:31,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:31,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:31,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 162 transitions, 1748 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:31,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:31,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:31,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:32,047 INFO L124 PetriNetUnfolderBase]: 2192/3296 cut-off events. [2024-06-27 21:26:32,047 INFO L125 PetriNetUnfolderBase]: For 46856/46986 co-relation queries the response was YES. [2024-06-27 21:26:32,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18102 conditions, 3296 events. 2192/3296 cut-off events. For 46856/46986 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15861 event pairs, 596 based on Foata normal form. 83/3293 useless extension candidates. Maximal degree in co-relation 18046. Up to 2963 conditions per place. [2024-06-27 21:26:32,067 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 126 selfloop transitions, 62 changer transitions 0/208 dead transitions. [2024-06-27 21:26:32,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 208 transitions, 2376 flow [2024-06-27 21:26:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:26:32,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:26:32,069 INFO L175 Difference]: Start difference. First operand has 118 places, 162 transitions, 1748 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:26:32,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 208 transitions, 2376 flow [2024-06-27 21:26:32,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 208 transitions, 2228 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:32,113 INFO L231 Difference]: Finished difference. Result has 122 places, 178 transitions, 1928 flow [2024-06-27 21:26:32,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1928, PETRI_PLACES=122, PETRI_TRANSITIONS=178} [2024-06-27 21:26:32,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-27 21:26:32,114 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 178 transitions, 1928 flow [2024-06-27 21:26:32,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:32,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:32,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:32,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:26:32,115 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:32,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1425549496, now seen corresponding path program 4 times [2024-06-27 21:26:32,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:32,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139493329] [2024-06-27 21:26:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:32,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:32,986 INFO 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 21:26:32,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:32,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139493329] [2024-06-27 21:26:32,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139493329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:32,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:32,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:32,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496945744] [2024-06-27 21:26:32,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:32,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:32,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:32,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:32,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:33,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:33,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 178 transitions, 1928 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:33,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:33,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:33,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:33,779 INFO L124 PetriNetUnfolderBase]: 2230/3356 cut-off events. [2024-06-27 21:26:33,779 INFO L125 PetriNetUnfolderBase]: For 53205/53364 co-relation queries the response was YES. [2024-06-27 21:26:33,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19134 conditions, 3356 events. 2230/3356 cut-off events. For 53205/53364 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16232 event pairs, 605 based on Foata normal form. 103/3370 useless extension candidates. Maximal degree in co-relation 19076. Up to 2909 conditions per place. [2024-06-27 21:26:33,805 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 115 selfloop transitions, 77 changer transitions 0/212 dead transitions. [2024-06-27 21:26:33,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 212 transitions, 2459 flow [2024-06-27 21:26:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:26:33,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:26:33,807 INFO L175 Difference]: Start difference. First operand has 122 places, 178 transitions, 1928 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:26:33,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 212 transitions, 2459 flow [2024-06-27 21:26:33,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 212 transitions, 2387 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:33,863 INFO L231 Difference]: Finished difference. Result has 127 places, 181 transitions, 2067 flow [2024-06-27 21:26:33,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1856, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2067, PETRI_PLACES=127, PETRI_TRANSITIONS=181} [2024-06-27 21:26:33,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-27 21:26:33,864 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 181 transitions, 2067 flow [2024-06-27 21:26:33,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:33,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:33,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:33,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:26:33,864 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:33,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:33,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1458617692, now seen corresponding path program 1 times [2024-06-27 21:26:33,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:33,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056297453] [2024-06-27 21:26:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:33,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:34,482 INFO 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 21:26:34,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:34,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056297453] [2024-06-27 21:26:34,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056297453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:34,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:34,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:34,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387989841] [2024-06-27 21:26:34,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:34,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:34,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:34,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:34,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 181 transitions, 2067 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:26:34,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:34,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:34,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:35,237 INFO L124 PetriNetUnfolderBase]: 2460/3652 cut-off events. [2024-06-27 21:26:35,238 INFO L125 PetriNetUnfolderBase]: For 53485/53487 co-relation queries the response was YES. [2024-06-27 21:26:35,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20772 conditions, 3652 events. 2460/3652 cut-off events. For 53485/53487 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17368 event pairs, 882 based on Foata normal form. 4/3655 useless extension candidates. Maximal degree in co-relation 20713. Up to 3506 conditions per place. [2024-06-27 21:26:35,257 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 181 selfloop transitions, 34 changer transitions 0/218 dead transitions. [2024-06-27 21:26:35,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 218 transitions, 2686 flow [2024-06-27 21:26:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:26:35,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:26:35,259 INFO L175 Difference]: Start difference. First operand has 127 places, 181 transitions, 2067 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:26:35,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 218 transitions, 2686 flow [2024-06-27 21:26:35,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 218 transitions, 2505 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:35,317 INFO L231 Difference]: Finished difference. Result has 130 places, 191 transitions, 2085 flow [2024-06-27 21:26:35,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2085, PETRI_PLACES=130, PETRI_TRANSITIONS=191} [2024-06-27 21:26:35,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-27 21:26:35,318 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 191 transitions, 2085 flow [2024-06-27 21:26:35,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:26:35,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:35,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:35,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:26:35,319 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:35,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash 660011110, now seen corresponding path program 2 times [2024-06-27 21:26:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527669961] [2024-06-27 21:26:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:35,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:36,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:36,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527669961] [2024-06-27 21:26:36,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527669961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:36,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:36,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:36,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201586814] [2024-06-27 21:26:36,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:36,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:36,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:36,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:36,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:36,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:36,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 191 transitions, 2085 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:26:36,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:36,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:36,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:36,790 INFO L124 PetriNetUnfolderBase]: 2452/3640 cut-off events. [2024-06-27 21:26:36,790 INFO L125 PetriNetUnfolderBase]: For 56401/56403 co-relation queries the response was YES. [2024-06-27 21:26:36,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20645 conditions, 3640 events. 2452/3640 cut-off events. For 56401/56403 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17294 event pairs, 884 based on Foata normal form. 4/3643 useless extension candidates. Maximal degree in co-relation 20584. Up to 3435 conditions per place. [2024-06-27 21:26:36,814 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 166 selfloop transitions, 44 changer transitions 0/213 dead transitions. [2024-06-27 21:26:36,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 213 transitions, 2581 flow [2024-06-27 21:26:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:26:36,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-27 21:26:36,816 INFO L175 Difference]: Start difference. First operand has 130 places, 191 transitions, 2085 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:26:36,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 213 transitions, 2581 flow [2024-06-27 21:26:36,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 213 transitions, 2531 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:36,884 INFO L231 Difference]: Finished difference. Result has 134 places, 191 transitions, 2143 flow [2024-06-27 21:26:36,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2143, PETRI_PLACES=134, PETRI_TRANSITIONS=191} [2024-06-27 21:26:36,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-27 21:26:36,885 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 191 transitions, 2143 flow [2024-06-27 21:26:36,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:26:36,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:36,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:36,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:26:36,886 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:36,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:36,886 INFO L85 PathProgramCache]: Analyzing trace with hash -165524402, now seen corresponding path program 5 times [2024-06-27 21:26:36,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:36,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187176543] [2024-06-27 21:26:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:36,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:37,749 INFO 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 21:26:37,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:37,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187176543] [2024-06-27 21:26:37,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187176543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:37,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:37,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334371418] [2024-06-27 21:26:37,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:37,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:37,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:37,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:37,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:37,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 191 transitions, 2143 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:37,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:37,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:37,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:38,597 INFO L124 PetriNetUnfolderBase]: 2277/3426 cut-off events. [2024-06-27 21:26:38,598 INFO L125 PetriNetUnfolderBase]: For 71020/71178 co-relation queries the response was YES. [2024-06-27 21:26:38,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20626 conditions, 3426 events. 2277/3426 cut-off events. For 71020/71178 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16571 event pairs, 619 based on Foata normal form. 103/3438 useless extension candidates. Maximal degree in co-relation 20564. Up to 2892 conditions per place. [2024-06-27 21:26:38,619 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 103 selfloop transitions, 89 changer transitions 0/218 dead transitions. [2024-06-27 21:26:38,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 218 transitions, 2651 flow [2024-06-27 21:26:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:26:38,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:26:38,620 INFO L175 Difference]: Start difference. First operand has 134 places, 191 transitions, 2143 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:26:38,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 218 transitions, 2651 flow [2024-06-27 21:26:38,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 218 transitions, 2512 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:38,693 INFO L231 Difference]: Finished difference. Result has 134 places, 194 transitions, 2252 flow [2024-06-27 21:26:38,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2252, PETRI_PLACES=134, PETRI_TRANSITIONS=194} [2024-06-27 21:26:38,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-27 21:26:38,694 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 194 transitions, 2252 flow [2024-06-27 21:26:38,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:38,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:38,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:38,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:26:38,694 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:38,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:38,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1519025398, now seen corresponding path program 6 times [2024-06-27 21:26:38,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:38,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831555676] [2024-06-27 21:26:38,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:38,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:39,668 INFO 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 21:26:39,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:39,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831555676] [2024-06-27 21:26:39,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831555676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:39,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:39,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:39,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138632915] [2024-06-27 21:26:39,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:39,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:39,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:39,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:39,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:26:39,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 194 transitions, 2252 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:39,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:39,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:26:39,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:40,531 INFO L124 PetriNetUnfolderBase]: 2275/3428 cut-off events. [2024-06-27 21:26:40,532 INFO L125 PetriNetUnfolderBase]: For 68073/68234 co-relation queries the response was YES. [2024-06-27 21:26:40,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20771 conditions, 3428 events. 2275/3428 cut-off events. For 68073/68234 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16612 event pairs, 629 based on Foata normal form. 105/3431 useless extension candidates. Maximal degree in co-relation 20709. Up to 2833 conditions per place. [2024-06-27 21:26:40,557 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 103 selfloop transitions, 91 changer transitions 0/220 dead transitions. [2024-06-27 21:26:40,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 220 transitions, 2768 flow [2024-06-27 21:26:40,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:26:40,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:26:40,559 INFO L175 Difference]: Start difference. First operand has 134 places, 194 transitions, 2252 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:26:40,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 220 transitions, 2768 flow [2024-06-27 21:26:40,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 220 transitions, 2554 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:40,624 INFO L231 Difference]: Finished difference. Result has 136 places, 197 transitions, 2287 flow [2024-06-27 21:26:40,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2287, PETRI_PLACES=136, PETRI_TRANSITIONS=197} [2024-06-27 21:26:40,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-27 21:26:40,624 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 197 transitions, 2287 flow [2024-06-27 21:26:40,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:26:40,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:40,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:40,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:26:40,625 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:40,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:40,626 INFO L85 PathProgramCache]: Analyzing trace with hash -868140447, now seen corresponding path program 1 times [2024-06-27 21:26:40,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:40,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461205863] [2024-06-27 21:26:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:40,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:41,596 INFO 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 21:26:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461205863] [2024-06-27 21:26:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461205863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:41,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:41,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:41,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265554782] [2024-06-27 21:26:41,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:41,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:41,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:41,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:41,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:41,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 197 transitions, 2287 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:41,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:41,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:41,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:42,384 INFO L124 PetriNetUnfolderBase]: 2490/3694 cut-off events. [2024-06-27 21:26:42,384 INFO L125 PetriNetUnfolderBase]: For 58688/58690 co-relation queries the response was YES. [2024-06-27 21:26:42,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21422 conditions, 3694 events. 2490/3694 cut-off events. For 58688/58690 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17476 event pairs, 567 based on Foata normal form. 6/3699 useless extension candidates. Maximal degree in co-relation 21359. Up to 3439 conditions per place. [2024-06-27 21:26:42,410 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 205 selfloop transitions, 48 changer transitions 0/256 dead transitions. [2024-06-27 21:26:42,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 256 transitions, 3163 flow [2024-06-27 21:26:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:26:42,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 21:26:42,412 INFO L175 Difference]: Start difference. First operand has 136 places, 197 transitions, 2287 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:26:42,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 256 transitions, 3163 flow [2024-06-27 21:26:42,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 256 transitions, 2910 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:42,480 INFO L231 Difference]: Finished difference. Result has 144 places, 222 transitions, 2492 flow [2024-06-27 21:26:42,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2492, PETRI_PLACES=144, PETRI_TRANSITIONS=222} [2024-06-27 21:26:42,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-27 21:26:42,481 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 222 transitions, 2492 flow [2024-06-27 21:26:42,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:42,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:42,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:42,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:26:42,482 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:42,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash -240772195, now seen corresponding path program 2 times [2024-06-27 21:26:42,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:42,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671527777] [2024-06-27 21:26:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:43,315 INFO 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 21:26:43,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:43,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671527777] [2024-06-27 21:26:43,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671527777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:43,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:43,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:43,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488549254] [2024-06-27 21:26:43,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:43,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:43,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:43,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:43,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 222 transitions, 2492 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:43,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:43,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:43,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:44,218 INFO L124 PetriNetUnfolderBase]: 2576/3820 cut-off events. [2024-06-27 21:26:44,218 INFO L125 PetriNetUnfolderBase]: For 64666/64666 co-relation queries the response was YES. [2024-06-27 21:26:44,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22604 conditions, 3820 events. 2576/3820 cut-off events. For 64666/64666 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18125 event pairs, 570 based on Foata normal form. 4/3823 useless extension candidates. Maximal degree in co-relation 22536. Up to 3352 conditions per place. [2024-06-27 21:26:44,249 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 207 selfloop transitions, 66 changer transitions 0/276 dead transitions. [2024-06-27 21:26:44,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 276 transitions, 3464 flow [2024-06-27 21:26:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:26:44,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:26:44,250 INFO L175 Difference]: Start difference. First operand has 144 places, 222 transitions, 2492 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:26:44,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 276 transitions, 3464 flow [2024-06-27 21:26:44,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 276 transitions, 3415 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 21:26:44,338 INFO L231 Difference]: Finished difference. Result has 153 places, 235 transitions, 2765 flow [2024-06-27 21:26:44,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2765, PETRI_PLACES=153, PETRI_TRANSITIONS=235} [2024-06-27 21:26:44,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-27 21:26:44,339 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 235 transitions, 2765 flow [2024-06-27 21:26:44,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:44,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:44,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:44,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:26:44,340 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:44,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:44,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1242368323, now seen corresponding path program 3 times [2024-06-27 21:26:44,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:44,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95027447] [2024-06-27 21:26:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:44,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:45,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:45,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95027447] [2024-06-27 21:26:45,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95027447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:45,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:45,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:45,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319288769] [2024-06-27 21:26:45,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:45,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:45,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:45,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:45,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 235 transitions, 2765 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:45,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:45,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:45,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:46,237 INFO L124 PetriNetUnfolderBase]: 2566/3806 cut-off events. [2024-06-27 21:26:46,238 INFO L125 PetriNetUnfolderBase]: For 71599/71599 co-relation queries the response was YES. [2024-06-27 21:26:46,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23429 conditions, 3806 events. 2566/3806 cut-off events. For 71599/71599 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18050 event pairs, 563 based on Foata normal form. 4/3809 useless extension candidates. Maximal degree in co-relation 23357. Up to 3344 conditions per place. [2024-06-27 21:26:46,265 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 201 selfloop transitions, 73 changer transitions 0/277 dead transitions. [2024-06-27 21:26:46,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 277 transitions, 3561 flow [2024-06-27 21:26:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:26:46,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 21:26:46,267 INFO L175 Difference]: Start difference. First operand has 153 places, 235 transitions, 2765 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:26:46,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 277 transitions, 3561 flow [2024-06-27 21:26:46,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 277 transitions, 3450 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:46,357 INFO L231 Difference]: Finished difference. Result has 159 places, 239 transitions, 2881 flow [2024-06-27 21:26:46,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2664, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2881, PETRI_PLACES=159, PETRI_TRANSITIONS=239} [2024-06-27 21:26:46,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-27 21:26:46,358 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 239 transitions, 2881 flow [2024-06-27 21:26:46,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:46,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:46,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:46,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:26:46,359 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:46,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash 404258811, now seen corresponding path program 4 times [2024-06-27 21:26:46,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:46,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226312828] [2024-06-27 21:26:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:46,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:47,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:47,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226312828] [2024-06-27 21:26:47,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226312828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:47,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:47,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:47,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202695245] [2024-06-27 21:26:47,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:47,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:47,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:47,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:47,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:47,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 239 transitions, 2881 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:47,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:47,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:47,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:47,983 INFO L124 PetriNetUnfolderBase]: 2570/3810 cut-off events. [2024-06-27 21:26:47,983 INFO L125 PetriNetUnfolderBase]: For 75488/75492 co-relation queries the response was YES. [2024-06-27 21:26:48,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23864 conditions, 3810 events. 2570/3810 cut-off events. For 75488/75492 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18102 event pairs, 571 based on Foata normal form. 8/3817 useless extension candidates. Maximal degree in co-relation 23789. Up to 3548 conditions per place. [2024-06-27 21:26:48,014 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 221 selfloop transitions, 54 changer transitions 0/278 dead transitions. [2024-06-27 21:26:48,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 278 transitions, 3588 flow [2024-06-27 21:26:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:26:48,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 21:26:48,015 INFO L175 Difference]: Start difference. First operand has 159 places, 239 transitions, 2881 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:26:48,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 278 transitions, 3588 flow [2024-06-27 21:26:48,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 278 transitions, 3472 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:48,143 INFO L231 Difference]: Finished difference. Result has 164 places, 244 transitions, 2954 flow [2024-06-27 21:26:48,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2954, PETRI_PLACES=164, PETRI_TRANSITIONS=244} [2024-06-27 21:26:48,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-27 21:26:48,144 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 244 transitions, 2954 flow [2024-06-27 21:26:48,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:48,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:48,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:48,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:26:48,144 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:48,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash -353488069, now seen corresponding path program 1 times [2024-06-27 21:26:48,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:48,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466493024] [2024-06-27 21:26:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:48,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:48,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466493024] [2024-06-27 21:26:48,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466493024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:48,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:48,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:48,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108131759] [2024-06-27 21:26:48,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:48,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:48,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:48,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:48,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:48,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 244 transitions, 2954 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:48,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:48,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:48,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:49,733 INFO L124 PetriNetUnfolderBase]: 2626/3899 cut-off events. [2024-06-27 21:26:49,733 INFO L125 PetriNetUnfolderBase]: For 82681/82685 co-relation queries the response was YES. [2024-06-27 21:26:49,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24483 conditions, 3899 events. 2626/3899 cut-off events. For 82681/82685 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18703 event pairs, 781 based on Foata normal form. 12/3909 useless extension candidates. Maximal degree in co-relation 24406. Up to 3704 conditions per place. [2024-06-27 21:26:49,769 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 251 selfloop transitions, 35 changer transitions 0/289 dead transitions. [2024-06-27 21:26:49,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 289 transitions, 3733 flow [2024-06-27 21:26:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:26:49,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-27 21:26:49,771 INFO L175 Difference]: Start difference. First operand has 164 places, 244 transitions, 2954 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:26:49,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 289 transitions, 3733 flow [2024-06-27 21:26:49,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 289 transitions, 3600 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:49,897 INFO L231 Difference]: Finished difference. Result has 170 places, 252 transitions, 3004 flow [2024-06-27 21:26:49,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3004, PETRI_PLACES=170, PETRI_TRANSITIONS=252} [2024-06-27 21:26:49,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-27 21:26:49,898 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 252 transitions, 3004 flow [2024-06-27 21:26:49,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:49,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:49,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:49,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:26:49,899 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:49,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:49,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1995938061, now seen corresponding path program 5 times [2024-06-27 21:26:49,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:49,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131346676] [2024-06-27 21:26:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:49,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:50,826 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 21:26:50,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:50,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131346676] [2024-06-27 21:26:50,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131346676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:50,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:50,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:50,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817856453] [2024-06-27 21:26:50,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:50,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:50,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:50,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:50,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:50,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:50,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 252 transitions, 3004 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:26:50,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:50,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:50,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:51,743 INFO L124 PetriNetUnfolderBase]: 2676/3969 cut-off events. [2024-06-27 21:26:51,744 INFO L125 PetriNetUnfolderBase]: For 87237/87237 co-relation queries the response was YES. [2024-06-27 21:26:51,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25182 conditions, 3969 events. 2676/3969 cut-off events. For 87237/87237 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18947 event pairs, 621 based on Foata normal form. 4/3967 useless extension candidates. Maximal degree in co-relation 25102. Up to 3699 conditions per place. [2024-06-27 21:26:51,778 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 236 selfloop transitions, 60 changer transitions 0/299 dead transitions. [2024-06-27 21:26:51,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 299 transitions, 3878 flow [2024-06-27 21:26:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:51,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:51,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:26:51,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 21:26:51,782 INFO L175 Difference]: Start difference. First operand has 170 places, 252 transitions, 3004 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:26:51,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 299 transitions, 3878 flow [2024-06-27 21:26:51,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 299 transitions, 3798 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:51,910 INFO L231 Difference]: Finished difference. Result has 175 places, 270 transitions, 3281 flow [2024-06-27 21:26:51,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2932, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3281, PETRI_PLACES=175, PETRI_TRANSITIONS=270} [2024-06-27 21:26:51,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-27 21:26:51,911 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 270 transitions, 3281 flow [2024-06-27 21:26:51,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:26:51,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:51,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:51,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:26:51,912 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:51,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash -17601647, now seen corresponding path program 6 times [2024-06-27 21:26:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:51,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425144686] [2024-06-27 21:26:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:52,740 INFO 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 21:26:52,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:52,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425144686] [2024-06-27 21:26:52,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425144686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:52,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:52,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:52,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348269441] [2024-06-27 21:26:52,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:52,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:52,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:52,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:52,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:52,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:52,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 270 transitions, 3281 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:52,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:52,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:52,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:53,628 INFO L124 PetriNetUnfolderBase]: 2730/4048 cut-off events. [2024-06-27 21:26:53,629 INFO L125 PetriNetUnfolderBase]: For 97049/97049 co-relation queries the response was YES. [2024-06-27 21:26:53,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26486 conditions, 4048 events. 2730/4048 cut-off events. For 97049/97049 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19362 event pairs, 589 based on Foata normal form. 4/4051 useless extension candidates. Maximal degree in co-relation 26404. Up to 3391 conditions per place. [2024-06-27 21:26:53,666 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 111 changer transitions 0/311 dead transitions. [2024-06-27 21:26:53,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 311 transitions, 4217 flow [2024-06-27 21:26:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:53,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:53,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:26:53,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 21:26:53,668 INFO L175 Difference]: Start difference. First operand has 175 places, 270 transitions, 3281 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:26:53,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 311 transitions, 4217 flow [2024-06-27 21:26:53,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 311 transitions, 4179 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-27 21:26:53,833 INFO L231 Difference]: Finished difference. Result has 183 places, 279 transitions, 3651 flow [2024-06-27 21:26:53,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3243, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3651, PETRI_PLACES=183, PETRI_TRANSITIONS=279} [2024-06-27 21:26:53,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 21:26:53,834 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 279 transitions, 3651 flow [2024-06-27 21:26:53,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:53,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:53,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:53,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:26:53,835 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:53,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:53,835 INFO L85 PathProgramCache]: Analyzing trace with hash -875968359, now seen corresponding path program 7 times [2024-06-27 21:26:53,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:53,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376396007] [2024-06-27 21:26:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:53,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:54,681 INFO 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 21:26:54,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:54,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376396007] [2024-06-27 21:26:54,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376396007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:54,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:54,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:54,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464381869] [2024-06-27 21:26:54,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:54,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:54,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:54,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:54,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:54,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:54,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 279 transitions, 3651 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:54,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:54,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:54,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:55,645 INFO L124 PetriNetUnfolderBase]: 2720/4034 cut-off events. [2024-06-27 21:26:55,645 INFO L125 PetriNetUnfolderBase]: For 105835/105835 co-relation queries the response was YES. [2024-06-27 21:26:55,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27573 conditions, 4034 events. 2720/4034 cut-off events. For 105835/105835 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19260 event pairs, 599 based on Foata normal form. 4/4037 useless extension candidates. Maximal degree in co-relation 27487. Up to 3383 conditions per place. [2024-06-27 21:26:55,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 200 selfloop transitions, 105 changer transitions 0/308 dead transitions. [2024-06-27 21:26:55,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 308 transitions, 4355 flow [2024-06-27 21:26:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:26:55,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 21:26:55,684 INFO L175 Difference]: Start difference. First operand has 183 places, 279 transitions, 3651 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:26:55,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 308 transitions, 4355 flow [2024-06-27 21:26:55,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 308 transitions, 4238 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:55,898 INFO L231 Difference]: Finished difference. Result has 187 places, 279 transitions, 3756 flow [2024-06-27 21:26:55,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3756, PETRI_PLACES=187, PETRI_TRANSITIONS=279} [2024-06-27 21:26:55,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-27 21:26:55,899 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 279 transitions, 3756 flow [2024-06-27 21:26:55,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:55,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:55,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:55,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:26:55,900 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:55,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash -12029521, now seen corresponding path program 2 times [2024-06-27 21:26:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:55,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957246316] [2024-06-27 21:26:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:55,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:56,627 INFO 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 21:26:56,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:56,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957246316] [2024-06-27 21:26:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957246316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:56,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:56,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556520987] [2024-06-27 21:26:56,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:56,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:56,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:56,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:56,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:56,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 279 transitions, 3756 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:56,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:56,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:56,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:57,528 INFO L124 PetriNetUnfolderBase]: 2776/4122 cut-off events. [2024-06-27 21:26:57,528 INFO L125 PetriNetUnfolderBase]: For 105695/105699 co-relation queries the response was YES. [2024-06-27 21:26:57,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27918 conditions, 4122 events. 2776/4122 cut-off events. For 105695/105699 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 19981 event pairs, 789 based on Foata normal form. 12/4131 useless extension candidates. Maximal degree in co-relation 27831. Up to 3816 conditions per place. [2024-06-27 21:26:57,565 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 268 selfloop transitions, 46 changer transitions 0/317 dead transitions. [2024-06-27 21:26:57,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 317 transitions, 4549 flow [2024-06-27 21:26:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:26:57,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 21:26:57,567 INFO L175 Difference]: Start difference. First operand has 187 places, 279 transitions, 3756 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:26:57,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 317 transitions, 4549 flow [2024-06-27 21:26:57,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 317 transitions, 4247 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 21:26:57,722 INFO L231 Difference]: Finished difference. Result has 189 places, 284 transitions, 3625 flow [2024-06-27 21:26:57,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3625, PETRI_PLACES=189, PETRI_TRANSITIONS=284} [2024-06-27 21:26:57,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-27 21:26:57,723 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 284 transitions, 3625 flow [2024-06-27 21:26:57,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:26:57,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:57,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:57,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:26:57,723 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:57,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:57,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1939048475, now seen corresponding path program 8 times [2024-06-27 21:26:57,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:57,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750768112] [2024-06-27 21:26:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:57,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:58,616 INFO 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 21:26:58,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:58,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750768112] [2024-06-27 21:26:58,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750768112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:58,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:58,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:58,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67262659] [2024-06-27 21:26:58,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:58,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:58,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:58,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:58,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:58,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:58,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 284 transitions, 3625 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:26:58,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:58,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:58,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:59,509 INFO L124 PetriNetUnfolderBase]: 2862/4248 cut-off events. [2024-06-27 21:26:59,509 INFO L125 PetriNetUnfolderBase]: For 109429/109429 co-relation queries the response was YES. [2024-06-27 21:26:59,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28506 conditions, 4248 events. 2862/4248 cut-off events. For 109429/109429 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20619 event pairs, 596 based on Foata normal form. 4/4247 useless extension candidates. Maximal degree in co-relation 28419. Up to 3127 conditions per place. [2024-06-27 21:26:59,548 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 216 selfloop transitions, 116 changer transitions 0/335 dead transitions. [2024-06-27 21:26:59,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 335 transitions, 4903 flow [2024-06-27 21:26:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:26:59,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:26:59,550 INFO L175 Difference]: Start difference. First operand has 189 places, 284 transitions, 3625 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:26:59,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 335 transitions, 4903 flow [2024-06-27 21:26:59,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 335 transitions, 4778 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:59,717 INFO L231 Difference]: Finished difference. Result has 193 places, 299 transitions, 3971 flow [2024-06-27 21:26:59,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3971, PETRI_PLACES=193, PETRI_TRANSITIONS=299} [2024-06-27 21:26:59,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-27 21:26:59,718 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 299 transitions, 3971 flow [2024-06-27 21:26:59,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:26:59,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:59,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:59,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:26:59,718 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:59,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:59,719 INFO L85 PathProgramCache]: Analyzing trace with hash 154854245, now seen corresponding path program 9 times [2024-06-27 21:26:59,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:59,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3404457] [2024-06-27 21:26:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:59,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:00,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:00,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3404457] [2024-06-27 21:27:00,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3404457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:00,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:00,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:00,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040690072] [2024-06-27 21:27:00,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:00,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:00,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:00,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:00,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:00,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:00,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 299 transitions, 3971 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:27:00,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:00,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:00,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:01,565 INFO L124 PetriNetUnfolderBase]: 2852/4234 cut-off events. [2024-06-27 21:27:01,565 INFO L125 PetriNetUnfolderBase]: For 110680/110680 co-relation queries the response was YES. [2024-06-27 21:27:01,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28962 conditions, 4234 events. 2852/4234 cut-off events. For 110680/110680 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20547 event pairs, 597 based on Foata normal form. 4/4233 useless extension candidates. Maximal degree in co-relation 28873. Up to 3419 conditions per place. [2024-06-27 21:27:01,604 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 211 selfloop transitions, 117 changer transitions 0/331 dead transitions. [2024-06-27 21:27:01,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 331 transitions, 4865 flow [2024-06-27 21:27:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:27:01,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:27:01,609 INFO L175 Difference]: Start difference. First operand has 193 places, 299 transitions, 3971 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:27:01,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 331 transitions, 4865 flow [2024-06-27 21:27:01,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 331 transitions, 4735 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-27 21:27:01,796 INFO L231 Difference]: Finished difference. Result has 200 places, 301 transitions, 4136 flow [2024-06-27 21:27:01,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4136, PETRI_PLACES=200, PETRI_TRANSITIONS=301} [2024-06-27 21:27:01,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-27 21:27:01,797 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 301 transitions, 4136 flow [2024-06-27 21:27:01,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:27:01,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:01,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:01,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:27:01,797 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:01,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash 155069571, now seen corresponding path program 3 times [2024-06-27 21:27:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:01,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292986169] [2024-06-27 21:27:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:02,497 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 21:27:02,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:02,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292986169] [2024-06-27 21:27:02,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292986169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:02,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:02,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:02,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787978664] [2024-06-27 21:27:02,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:02,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:02,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:02,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:02,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:02,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:02,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 301 transitions, 4136 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:27:02,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:02,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:02,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:03,409 INFO L124 PetriNetUnfolderBase]: 2886/4286 cut-off events. [2024-06-27 21:27:03,409 INFO L125 PetriNetUnfolderBase]: For 114785/114789 co-relation queries the response was YES. [2024-06-27 21:27:03,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29452 conditions, 4286 events. 2886/4286 cut-off events. For 114785/114789 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21070 event pairs, 674 based on Foata normal form. 12/4295 useless extension candidates. Maximal degree in co-relation 29360. Up to 3748 conditions per place. [2024-06-27 21:27:03,452 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 77 changer transitions 0/330 dead transitions. [2024-06-27 21:27:03,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 330 transitions, 4910 flow [2024-06-27 21:27:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:27:03,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 21:27:03,454 INFO L175 Difference]: Start difference. First operand has 200 places, 301 transitions, 4136 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:27:03,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 330 transitions, 4910 flow [2024-06-27 21:27:03,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 330 transitions, 4657 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:03,647 INFO L231 Difference]: Finished difference. Result has 202 places, 303 transitions, 4083 flow [2024-06-27 21:27:03,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3883, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4083, PETRI_PLACES=202, PETRI_TRANSITIONS=303} [2024-06-27 21:27:03,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-27 21:27:03,648 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 303 transitions, 4083 flow [2024-06-27 21:27:03,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:27:03,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:03,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:03,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:27:03,649 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:03,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:03,649 INFO L85 PathProgramCache]: Analyzing trace with hash 411562145, now seen corresponding path program 10 times [2024-06-27 21:27:03,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:03,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505223382] [2024-06-27 21:27:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:03,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:04,450 INFO 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 21:27:04,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:04,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505223382] [2024-06-27 21:27:04,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505223382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:04,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:04,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873936983] [2024-06-27 21:27:04,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:04,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:04,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:04,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:04,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:04,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 303 transitions, 4083 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:27:04,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:04,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:04,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:05,516 INFO L124 PetriNetUnfolderBase]: 2866/4260 cut-off events. [2024-06-27 21:27:05,516 INFO L125 PetriNetUnfolderBase]: For 119015/119015 co-relation queries the response was YES. [2024-06-27 21:27:05,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29200 conditions, 4260 events. 2866/4260 cut-off events. For 119015/119015 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20730 event pairs, 560 based on Foata normal form. 8/4263 useless extension candidates. Maximal degree in co-relation 29108. Up to 3165 conditions per place. [2024-06-27 21:27:05,599 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 203 selfloop transitions, 129 changer transitions 0/335 dead transitions. [2024-06-27 21:27:05,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 335 transitions, 4970 flow [2024-06-27 21:27:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:27:05,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 21:27:05,603 INFO L175 Difference]: Start difference. First operand has 202 places, 303 transitions, 4083 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:27:05,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 335 transitions, 4970 flow [2024-06-27 21:27:05,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 335 transitions, 4764 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:05,846 INFO L231 Difference]: Finished difference. Result has 204 places, 304 transitions, 4158 flow [2024-06-27 21:27:05,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4158, PETRI_PLACES=204, PETRI_TRANSITIONS=304} [2024-06-27 21:27:05,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 21:27:05,847 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 304 transitions, 4158 flow [2024-06-27 21:27:05,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:27:05,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:05,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:05,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:27:05,848 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:05,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash 420766851, now seen corresponding path program 4 times [2024-06-27 21:27:05,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:05,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940321715] [2024-06-27 21:27:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:06,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:06,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940321715] [2024-06-27 21:27:06,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940321715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:06,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:06,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:06,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966612452] [2024-06-27 21:27:06,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:06,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:06,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:06,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:06,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:06,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:06,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 304 transitions, 4158 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:27:06,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:06,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:06,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:07,422 INFO L124 PetriNetUnfolderBase]: 2900/4312 cut-off events. [2024-06-27 21:27:07,423 INFO L125 PetriNetUnfolderBase]: For 124762/124766 co-relation queries the response was YES. [2024-06-27 21:27:07,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29802 conditions, 4312 events. 2900/4312 cut-off events. For 124762/124766 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21239 event pairs, 715 based on Foata normal form. 12/4321 useless extension candidates. Maximal degree in co-relation 29709. Up to 3866 conditions per place. [2024-06-27 21:27:07,466 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 69 changer transitions 0/333 dead transitions. [2024-06-27 21:27:07,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 333 transitions, 4942 flow [2024-06-27 21:27:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:27:07,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 21:27:07,468 INFO L175 Difference]: Start difference. First operand has 204 places, 304 transitions, 4158 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:27:07,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 333 transitions, 4942 flow [2024-06-27 21:27:07,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 333 transitions, 4794 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:07,681 INFO L231 Difference]: Finished difference. Result has 208 places, 306 transitions, 4189 flow [2024-06-27 21:27:07,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4189, PETRI_PLACES=208, PETRI_TRANSITIONS=306} [2024-06-27 21:27:07,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-27 21:27:07,682 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 306 transitions, 4189 flow [2024-06-27 21:27:07,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:27:07,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:07,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:07,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:27:07,683 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:07,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash 421093281, now seen corresponding path program 5 times [2024-06-27 21:27:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:07,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616422544] [2024-06-27 21:27:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:08,321 INFO 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 21:27:08,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:08,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616422544] [2024-06-27 21:27:08,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616422544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:08,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:08,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:08,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002352261] [2024-06-27 21:27:08,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:08,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:08,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 306 transitions, 4189 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:27:08,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:08,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:08,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:09,217 INFO L124 PetriNetUnfolderBase]: 2884/4288 cut-off events. [2024-06-27 21:27:09,217 INFO L125 PetriNetUnfolderBase]: For 129258/129262 co-relation queries the response was YES. [2024-06-27 21:27:09,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29744 conditions, 4288 events. 2884/4288 cut-off events. For 129258/129262 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21146 event pairs, 652 based on Foata normal form. 12/4297 useless extension candidates. Maximal degree in co-relation 29650. Up to 3640 conditions per place. [2024-06-27 21:27:09,258 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 257 selfloop transitions, 76 changer transitions 0/336 dead transitions. [2024-06-27 21:27:09,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 336 transitions, 4985 flow [2024-06-27 21:27:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:27:09,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 21:27:09,260 INFO L175 Difference]: Start difference. First operand has 208 places, 306 transitions, 4189 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:27:09,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 336 transitions, 4985 flow [2024-06-27 21:27:09,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 336 transitions, 4824 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:09,453 INFO L231 Difference]: Finished difference. Result has 210 places, 308 transitions, 4225 flow [2024-06-27 21:27:09,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4028, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4225, PETRI_PLACES=210, PETRI_TRANSITIONS=308} [2024-06-27 21:27:09,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-27 21:27:09,453 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 308 transitions, 4225 flow [2024-06-27 21:27:09,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 21:27:09,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:09,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:09,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:27:09,454 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:09,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1145350193, now seen corresponding path program 1 times [2024-06-27 21:27:09,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:09,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250920782] [2024-06-27 21:27:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:09,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:10,731 INFO 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 21:27:10,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:10,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250920782] [2024-06-27 21:27:10,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250920782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:10,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:10,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504195262] [2024-06-27 21:27:10,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:10,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:10,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:10,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:27:10,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 308 transitions, 4225 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:10,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:10,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:27:10,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:11,912 INFO L124 PetriNetUnfolderBase]: 2748/4131 cut-off events. [2024-06-27 21:27:11,912 INFO L125 PetriNetUnfolderBase]: For 144140/144192 co-relation queries the response was YES. [2024-06-27 21:27:11,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29680 conditions, 4131 events. 2748/4131 cut-off events. For 144140/144192 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20607 event pairs, 565 based on Foata normal form. 5/4032 useless extension candidates. Maximal degree in co-relation 29585. Up to 3656 conditions per place. [2024-06-27 21:27:11,946 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 195 selfloop transitions, 84 changer transitions 0/344 dead transitions. [2024-06-27 21:27:11,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 344 transitions, 4930 flow [2024-06-27 21:27:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:27:11,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:27:11,949 INFO L175 Difference]: Start difference. First operand has 210 places, 308 transitions, 4225 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:27:11,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 344 transitions, 4930 flow [2024-06-27 21:27:12,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 344 transitions, 4751 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:12,140 INFO L231 Difference]: Finished difference. Result has 213 places, 310 transitions, 4268 flow [2024-06-27 21:27:12,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4268, PETRI_PLACES=213, PETRI_TRANSITIONS=310} [2024-06-27 21:27:12,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-27 21:27:12,141 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 310 transitions, 4268 flow [2024-06-27 21:27:12,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:12,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:12,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:12,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:27:12,142 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:12,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:12,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1819219821, now seen corresponding path program 2 times [2024-06-27 21:27:12,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848950488] [2024-06-27 21:27:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:12,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:13,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:13,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848950488] [2024-06-27 21:27:13,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848950488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:13,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:13,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:13,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096310096] [2024-06-27 21:27:13,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:13,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:13,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:13,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:13,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:13,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:27:13,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 310 transitions, 4268 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:27:13,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:13,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:27:13,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:14,233 INFO L124 PetriNetUnfolderBase]: 2794/4210 cut-off events. [2024-06-27 21:27:14,234 INFO L125 PetriNetUnfolderBase]: For 156182/156222 co-relation queries the response was YES. [2024-06-27 21:27:14,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30286 conditions, 4210 events. 2794/4210 cut-off events. For 156182/156222 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21275 event pairs, 707 based on Foata normal form. 10/4096 useless extension candidates. Maximal degree in co-relation 30190. Up to 3755 conditions per place. [2024-06-27 21:27:14,273 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 213 selfloop transitions, 71 changer transitions 0/349 dead transitions. [2024-06-27 21:27:14,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 349 transitions, 4998 flow [2024-06-27 21:27:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:27:14,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 21:27:14,274 INFO L175 Difference]: Start difference. First operand has 213 places, 310 transitions, 4268 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:27:14,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 349 transitions, 4998 flow [2024-06-27 21:27:14,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 349 transitions, 4804 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:14,492 INFO L231 Difference]: Finished difference. Result has 216 places, 314 transitions, 4289 flow [2024-06-27 21:27:14,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4074, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4289, PETRI_PLACES=216, PETRI_TRANSITIONS=314} [2024-06-27 21:27:14,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-27 21:27:14,493 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 314 transitions, 4289 flow [2024-06-27 21:27:14,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:27:14,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:14,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:14,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:27:14,494 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:14,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:14,494 INFO L85 PathProgramCache]: Analyzing trace with hash 585986643, now seen corresponding path program 3 times [2024-06-27 21:27:14,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:14,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224636207] [2024-06-27 21:27:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:14,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:15,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:15,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224636207] [2024-06-27 21:27:15,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224636207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:15,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:15,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:15,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902182080] [2024-06-27 21:27:15,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:15,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:15,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:15,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:27:15,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 314 transitions, 4289 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:27:15,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:15,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:27:15,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:16,455 INFO L124 PetriNetUnfolderBase]: 2812/4255 cut-off events. [2024-06-27 21:27:16,456 INFO L125 PetriNetUnfolderBase]: For 165442/165508 co-relation queries the response was YES. [2024-06-27 21:27:16,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31228 conditions, 4255 events. 2812/4255 cut-off events. For 165442/165508 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21727 event pairs, 709 based on Foata normal form. 11/4139 useless extension candidates. Maximal degree in co-relation 31130. Up to 3755 conditions per place. [2024-06-27 21:27:16,499 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 86 changer transitions 0/352 dead transitions. [2024-06-27 21:27:16,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 352 transitions, 5025 flow [2024-06-27 21:27:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:27:16,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 21:27:16,501 INFO L175 Difference]: Start difference. First operand has 216 places, 314 transitions, 4289 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:27:16,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 352 transitions, 5025 flow [2024-06-27 21:27:16,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 352 transitions, 4856 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:16,836 INFO L231 Difference]: Finished difference. Result has 219 places, 318 transitions, 4368 flow [2024-06-27 21:27:16,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4120, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4368, PETRI_PLACES=219, PETRI_TRANSITIONS=318} [2024-06-27 21:27:16,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-27 21:27:16,837 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 318 transitions, 4368 flow [2024-06-27 21:27:16,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:27:16,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:16,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:16,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:27:16,838 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:16,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2112086607, now seen corresponding path program 4 times [2024-06-27 21:27:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:16,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957232878] [2024-06-27 21:27:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:16,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:17,912 INFO 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 21:27:17,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:17,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957232878] [2024-06-27 21:27:17,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957232878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:17,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:17,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:17,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437822172] [2024-06-27 21:27:17,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:17,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:17,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:17,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:18,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:27:18,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 318 transitions, 4368 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:18,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:18,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:27:18,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:19,029 INFO L124 PetriNetUnfolderBase]: 2882/4359 cut-off events. [2024-06-27 21:27:19,029 INFO L125 PetriNetUnfolderBase]: For 178349/178479 co-relation queries the response was YES. [2024-06-27 21:27:19,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31949 conditions, 4359 events. 2882/4359 cut-off events. For 178349/178479 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22405 event pairs, 612 based on Foata normal form. 35/4262 useless extension candidates. Maximal degree in co-relation 31850. Up to 3815 conditions per place. [2024-06-27 21:27:19,080 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 218 selfloop transitions, 78 changer transitions 0/361 dead transitions. [2024-06-27 21:27:19,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 361 transitions, 5158 flow [2024-06-27 21:27:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:27:19,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 21:27:19,082 INFO L175 Difference]: Start difference. First operand has 219 places, 318 transitions, 4368 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:27:19,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 361 transitions, 5158 flow [2024-06-27 21:27:19,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 361 transitions, 4958 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:19,373 INFO L231 Difference]: Finished difference. Result has 222 places, 327 transitions, 4453 flow [2024-06-27 21:27:19,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4453, PETRI_PLACES=222, PETRI_TRANSITIONS=327} [2024-06-27 21:27:19,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 21:27:19,374 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 327 transitions, 4453 flow [2024-06-27 21:27:19,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:19,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:19,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:19,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:27:19,375 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:19,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:19,375 INFO L85 PathProgramCache]: Analyzing trace with hash 706192661, now seen corresponding path program 1 times [2024-06-27 21:27:19,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:19,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608242042] [2024-06-27 21:27:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:19,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:20,336 INFO 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 21:27:20,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:20,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608242042] [2024-06-27 21:27:20,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608242042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:20,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:20,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:20,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674453236] [2024-06-27 21:27:20,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:20,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:20,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:20,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:20,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:20,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:20,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 327 transitions, 4453 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:20,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:20,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:20,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:21,584 INFO L124 PetriNetUnfolderBase]: 3115/4661 cut-off events. [2024-06-27 21:27:21,584 INFO L125 PetriNetUnfolderBase]: For 174427/174429 co-relation queries the response was YES. [2024-06-27 21:27:21,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33517 conditions, 4661 events. 3115/4661 cut-off events. For 174427/174429 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23712 event pairs, 807 based on Foata normal form. 6/4666 useless extension candidates. Maximal degree in co-relation 33416. Up to 4339 conditions per place. [2024-06-27 21:27:21,627 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 301 selfloop transitions, 65 changer transitions 0/369 dead transitions. [2024-06-27 21:27:21,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 369 transitions, 5364 flow [2024-06-27 21:27:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:27:21,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:27:21,629 INFO L175 Difference]: Start difference. First operand has 222 places, 327 transitions, 4453 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:27:21,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 369 transitions, 5364 flow [2024-06-27 21:27:21,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 369 transitions, 5162 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:21,945 INFO L231 Difference]: Finished difference. Result has 225 places, 330 transitions, 4440 flow [2024-06-27 21:27:21,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4251, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4440, PETRI_PLACES=225, PETRI_TRANSITIONS=330} [2024-06-27 21:27:21,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 21:27:21,946 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 330 transitions, 4440 flow [2024-06-27 21:27:21,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:21,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:21,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:21,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:27:21,947 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:21,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:21,947 INFO L85 PathProgramCache]: Analyzing trace with hash -146050993, now seen corresponding path program 5 times [2024-06-27 21:27:21,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:21,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647987254] [2024-06-27 21:27:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:21,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:23,154 INFO 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 21:27:23,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:23,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647987254] [2024-06-27 21:27:23,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647987254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:23,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:23,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:23,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287468234] [2024-06-27 21:27:23,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:23,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:23,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:23,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:23,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:23,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:27:23,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 330 transitions, 4440 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:27:23,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:23,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:27:23,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:24,349 INFO L124 PetriNetUnfolderBase]: 2968/4503 cut-off events. [2024-06-27 21:27:24,349 INFO L125 PetriNetUnfolderBase]: For 192782/192944 co-relation queries the response was YES. [2024-06-27 21:27:24,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33177 conditions, 4503 events. 2968/4503 cut-off events. For 192782/192944 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23437 event pairs, 570 based on Foata normal form. 51/4422 useless extension candidates. Maximal degree in co-relation 33076. Up to 3986 conditions per place. [2024-06-27 21:27:24,399 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 232 selfloop transitions, 79 changer transitions 0/377 dead transitions. [2024-06-27 21:27:24,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 377 transitions, 5302 flow [2024-06-27 21:27:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:27:24,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:27:24,401 INFO L175 Difference]: Start difference. First operand has 225 places, 330 transitions, 4440 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:27:24,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 377 transitions, 5302 flow [2024-06-27 21:27:24,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 377 transitions, 5150 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:24,744 INFO L231 Difference]: Finished difference. Result has 227 places, 342 transitions, 4617 flow [2024-06-27 21:27:24,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4617, PETRI_PLACES=227, PETRI_TRANSITIONS=342} [2024-06-27 21:27:24,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-27 21:27:24,745 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 342 transitions, 4617 flow [2024-06-27 21:27:24,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:27:24,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:24,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:24,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:27:24,746 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:24,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:24,746 INFO L85 PathProgramCache]: Analyzing trace with hash -256750443, now seen corresponding path program 2 times [2024-06-27 21:27:24,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:24,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415005568] [2024-06-27 21:27:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:24,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:25,798 INFO 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 21:27:25,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:25,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415005568] [2024-06-27 21:27:25,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415005568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:25,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:25,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:25,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895712083] [2024-06-27 21:27:25,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:25,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:25,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:25,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:25,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:25,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 342 transitions, 4617 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:27:25,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:25,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:25,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:26,886 INFO L124 PetriNetUnfolderBase]: 3278/4906 cut-off events. [2024-06-27 21:27:26,886 INFO L125 PetriNetUnfolderBase]: For 192150/192152 co-relation queries the response was YES. [2024-06-27 21:27:26,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35452 conditions, 4906 events. 3278/4906 cut-off events. For 192150/192152 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25231 event pairs, 705 based on Foata normal form. 6/4911 useless extension candidates. Maximal degree in co-relation 35349. Up to 4581 conditions per place. [2024-06-27 21:27:26,937 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 314 selfloop transitions, 69 changer transitions 0/386 dead transitions. [2024-06-27 21:27:26,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 386 transitions, 5581 flow [2024-06-27 21:27:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 21:27:26,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-27 21:27:26,938 INFO L175 Difference]: Start difference. First operand has 227 places, 342 transitions, 4617 flow. Second operand 10 states and 167 transitions. [2024-06-27 21:27:26,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 386 transitions, 5581 flow [2024-06-27 21:27:27,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 386 transitions, 5402 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:27,297 INFO L231 Difference]: Finished difference. Result has 231 places, 348 transitions, 4671 flow [2024-06-27 21:27:27,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4438, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4671, PETRI_PLACES=231, PETRI_TRANSITIONS=348} [2024-06-27 21:27:27,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-27 21:27:27,300 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 348 transitions, 4671 flow [2024-06-27 21:27:27,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:27:27,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:27,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:27,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:27:27,300 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:27,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash -141464233, now seen corresponding path program 6 times [2024-06-27 21:27:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342362789] [2024-06-27 21:27:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:27,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:28,592 INFO 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 21:27:28,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:28,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342362789] [2024-06-27 21:27:28,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342362789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:28,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:28,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:28,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27530972] [2024-06-27 21:27:28,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:28,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:28,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:28,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:28,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:28,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:27:28,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 348 transitions, 4671 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:28,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:28,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:27:28,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:29,832 INFO L124 PetriNetUnfolderBase]: 3051/4633 cut-off events. [2024-06-27 21:27:29,833 INFO L125 PetriNetUnfolderBase]: For 214140/214370 co-relation queries the response was YES. [2024-06-27 21:27:29,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34777 conditions, 4633 events. 3051/4633 cut-off events. For 214140/214370 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24400 event pairs, 921 based on Foata normal form. 53/4553 useless extension candidates. Maximal degree in co-relation 34673. Up to 4147 conditions per place. [2024-06-27 21:27:29,882 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 266 selfloop transitions, 79 changer transitions 0/413 dead transitions. [2024-06-27 21:27:29,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 413 transitions, 5945 flow [2024-06-27 21:27:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:27:29,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-27 21:27:29,886 INFO L175 Difference]: Start difference. First operand has 231 places, 348 transitions, 4671 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:27:29,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 413 transitions, 5945 flow [2024-06-27 21:27:30,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 413 transitions, 5827 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:30,214 INFO L231 Difference]: Finished difference. Result has 238 places, 375 transitions, 5268 flow [2024-06-27 21:27:30,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4559, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5268, PETRI_PLACES=238, PETRI_TRANSITIONS=375} [2024-06-27 21:27:30,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-27 21:27:30,215 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 375 transitions, 5268 flow [2024-06-27 21:27:30,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:30,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:30,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:30,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:27:30,216 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:30,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1572127265, now seen corresponding path program 3 times [2024-06-27 21:27:30,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:30,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324819137] [2024-06-27 21:27:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:30,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:31,424 INFO 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 21:27:31,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:31,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324819137] [2024-06-27 21:27:31,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324819137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:31,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:31,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:31,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147326822] [2024-06-27 21:27:31,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:31,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:31,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:31,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:31,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:31,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 375 transitions, 5268 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:31,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:31,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:31,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:32,711 INFO L124 PetriNetUnfolderBase]: 3365/5032 cut-off events. [2024-06-27 21:27:32,711 INFO L125 PetriNetUnfolderBase]: For 214627/214627 co-relation queries the response was YES. [2024-06-27 21:27:32,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37554 conditions, 5032 events. 3365/5032 cut-off events. For 214627/214627 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 25956 event pairs, 674 based on Foata normal form. 4/5035 useless extension candidates. Maximal degree in co-relation 37447. Up to 4503 conditions per place. [2024-06-27 21:27:32,765 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 319 selfloop transitions, 96 changer transitions 0/418 dead transitions. [2024-06-27 21:27:32,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 418 transitions, 6306 flow [2024-06-27 21:27:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:27:32,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:27:32,767 INFO L175 Difference]: Start difference. First operand has 238 places, 375 transitions, 5268 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:27:32,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 418 transitions, 6306 flow [2024-06-27 21:27:33,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 418 transitions, 6150 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:33,195 INFO L231 Difference]: Finished difference. Result has 242 places, 378 transitions, 5374 flow [2024-06-27 21:27:33,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5113, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5374, PETRI_PLACES=242, PETRI_TRANSITIONS=378} [2024-06-27 21:27:33,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-27 21:27:33,196 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 378 transitions, 5374 flow [2024-06-27 21:27:33,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:33,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:33,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:33,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:27:33,196 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:33,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:33,197 INFO L85 PathProgramCache]: Analyzing trace with hash -141279783, now seen corresponding path program 4 times [2024-06-27 21:27:33,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:33,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711933725] [2024-06-27 21:27:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:33,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:34,112 INFO 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 21:27:34,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:34,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711933725] [2024-06-27 21:27:34,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711933725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:34,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:34,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:34,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136459994] [2024-06-27 21:27:34,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:34,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:34,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:34,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:34,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:34,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:34,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 378 transitions, 5374 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:34,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:34,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:34,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:35,443 INFO L124 PetriNetUnfolderBase]: 3387/5064 cut-off events. [2024-06-27 21:27:35,444 INFO L125 PetriNetUnfolderBase]: For 223917/223917 co-relation queries the response was YES. [2024-06-27 21:27:35,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38012 conditions, 5064 events. 3387/5064 cut-off events. For 223917/223917 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26142 event pairs, 635 based on Foata normal form. 4/5067 useless extension candidates. Maximal degree in co-relation 37904. Up to 3921 conditions per place. [2024-06-27 21:27:35,514 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 249 selfloop transitions, 168 changer transitions 0/420 dead transitions. [2024-06-27 21:27:35,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 420 transitions, 6577 flow [2024-06-27 21:27:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:27:35,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:27:35,515 INFO L175 Difference]: Start difference. First operand has 242 places, 378 transitions, 5374 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:27:35,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 420 transitions, 6577 flow [2024-06-27 21:27:36,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 420 transitions, 6349 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:36,015 INFO L231 Difference]: Finished difference. Result has 243 places, 381 transitions, 5553 flow [2024-06-27 21:27:36,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5553, PETRI_PLACES=243, PETRI_TRANSITIONS=381} [2024-06-27 21:27:36,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-27 21:27:36,017 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 381 transitions, 5553 flow [2024-06-27 21:27:36,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:36,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:36,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:36,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:27:36,018 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:36,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash -141286293, now seen corresponding path program 5 times [2024-06-27 21:27:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:36,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863657633] [2024-06-27 21:27:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:36,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:37,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:37,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863657633] [2024-06-27 21:27:37,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863657633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:37,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:37,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:37,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177092011] [2024-06-27 21:27:37,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:37,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:37,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:37,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:37,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:37,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 381 transitions, 5553 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:37,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:37,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:37,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:38,666 INFO L124 PetriNetUnfolderBase]: 3409/5096 cut-off events. [2024-06-27 21:27:38,667 INFO L125 PetriNetUnfolderBase]: For 233591/233591 co-relation queries the response was YES. [2024-06-27 21:27:38,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38877 conditions, 5096 events. 3409/5096 cut-off events. For 233591/233591 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26298 event pairs, 669 based on Foata normal form. 4/5099 useless extension candidates. Maximal degree in co-relation 38768. Up to 4567 conditions per place. [2024-06-27 21:27:38,723 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 318 selfloop transitions, 104 changer transitions 0/425 dead transitions. [2024-06-27 21:27:38,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 425 transitions, 6620 flow [2024-06-27 21:27:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:27:38,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:27:38,725 INFO L175 Difference]: Start difference. First operand has 243 places, 381 transitions, 5553 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:27:38,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 425 transitions, 6620 flow [2024-06-27 21:27:39,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 425 transitions, 6085 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:39,205 INFO L231 Difference]: Finished difference. Result has 245 places, 384 transitions, 5307 flow [2024-06-27 21:27:39,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5307, PETRI_PLACES=245, PETRI_TRANSITIONS=384} [2024-06-27 21:27:39,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-27 21:27:39,206 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 384 transitions, 5307 flow [2024-06-27 21:27:39,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:39,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:39,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:39,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:27:39,206 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:39,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:39,207 INFO L85 PathProgramCache]: Analyzing trace with hash 730184955, now seen corresponding path program 1 times [2024-06-27 21:27:39,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:39,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412621063] [2024-06-27 21:27:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:39,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:39,812 INFO 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 21:27:39,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:39,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412621063] [2024-06-27 21:27:39,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412621063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:39,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:39,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:39,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108451322] [2024-06-27 21:27:39,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:39,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:39,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:39,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:39,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 384 transitions, 5307 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:27:39,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:39,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:39,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:40,993 INFO L124 PetriNetUnfolderBase]: 3458/5173 cut-off events. [2024-06-27 21:27:40,994 INFO L125 PetriNetUnfolderBase]: For 238574/238578 co-relation queries the response was YES. [2024-06-27 21:27:41,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38799 conditions, 5173 events. 3458/5173 cut-off events. For 238574/238578 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27032 event pairs, 964 based on Foata normal form. 8/5178 useless extension candidates. Maximal degree in co-relation 38690. Up to 4975 conditions per place. [2024-06-27 21:27:41,149 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 369 selfloop transitions, 58 changer transitions 0/430 dead transitions. [2024-06-27 21:27:41,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 430 transitions, 6750 flow [2024-06-27 21:27:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:27:41,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 21:27:41,151 INFO L175 Difference]: Start difference. First operand has 245 places, 384 transitions, 5307 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:27:41,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 430 transitions, 6750 flow [2024-06-27 21:27:41,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 430 transitions, 6496 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:41,601 INFO L231 Difference]: Finished difference. Result has 248 places, 406 transitions, 5582 flow [2024-06-27 21:27:41,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5582, PETRI_PLACES=248, PETRI_TRANSITIONS=406} [2024-06-27 21:27:41,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-27 21:27:41,602 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 406 transitions, 5582 flow [2024-06-27 21:27:41,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:27:41,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:41,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:41,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:27:41,602 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:41,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:41,603 INFO L85 PathProgramCache]: Analyzing trace with hash 654821189, now seen corresponding path program 7 times [2024-06-27 21:27:41,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:41,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629616853] [2024-06-27 21:27:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:41,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:42,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629616853] [2024-06-27 21:27:42,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629616853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:42,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:42,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:42,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607725771] [2024-06-27 21:27:42,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:42,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:42,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:43,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:27:43,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 406 transitions, 5582 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:43,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:43,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:27:43,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:44,329 INFO L124 PetriNetUnfolderBase]: 3214/4872 cut-off events. [2024-06-27 21:27:44,329 INFO L125 PetriNetUnfolderBase]: For 270884/271155 co-relation queries the response was YES. [2024-06-27 21:27:44,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38191 conditions, 4872 events. 3214/4872 cut-off events. For 270884/271155 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25632 event pairs, 612 based on Foata normal form. 48/4775 useless extension candidates. Maximal degree in co-relation 38078. Up to 4287 conditions per place. [2024-06-27 21:27:44,385 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 107 changer transitions 0/443 dead transitions. [2024-06-27 21:27:44,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 443 transitions, 6537 flow [2024-06-27 21:27:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:27:44,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:27:44,387 INFO L175 Difference]: Start difference. First operand has 248 places, 406 transitions, 5582 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:27:44,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 443 transitions, 6537 flow [2024-06-27 21:27:44,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 443 transitions, 6491 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 21:27:44,817 INFO L231 Difference]: Finished difference. Result has 256 places, 412 transitions, 5866 flow [2024-06-27 21:27:44,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5536, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5866, PETRI_PLACES=256, PETRI_TRANSITIONS=412} [2024-06-27 21:27:44,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-27 21:27:44,818 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 412 transitions, 5866 flow [2024-06-27 21:27:44,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:44,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:44,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:44,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:27:44,819 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:44,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1502772439, now seen corresponding path program 8 times [2024-06-27 21:27:44,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:44,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047025684] [2024-06-27 21:27:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:44,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:45,848 INFO 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 21:27:45,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:45,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047025684] [2024-06-27 21:27:45,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047025684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:45,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:45,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:45,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982663261] [2024-06-27 21:27:45,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:45,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:45,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:45,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:45,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:45,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:27:45,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 412 transitions, 5866 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:45,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:45,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:27:45,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:47,136 INFO L124 PetriNetUnfolderBase]: 3230/4897 cut-off events. [2024-06-27 21:27:47,136 INFO L125 PetriNetUnfolderBase]: For 288359/288646 co-relation queries the response was YES. [2024-06-27 21:27:47,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39034 conditions, 4897 events. 3230/4897 cut-off events. For 288359/288646 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25811 event pairs, 651 based on Foata normal form. 128/4876 useless extension candidates. Maximal degree in co-relation 38918. Up to 4161 conditions per place. [2024-06-27 21:27:47,185 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 259 selfloop transitions, 111 changer transitions 0/443 dead transitions. [2024-06-27 21:27:47,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 443 transitions, 6778 flow [2024-06-27 21:27:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:27:47,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 21:27:47,186 INFO L175 Difference]: Start difference. First operand has 256 places, 412 transitions, 5866 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:27:47,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 443 transitions, 6778 flow [2024-06-27 21:27:47,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 443 transitions, 6567 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:47,676 INFO L231 Difference]: Finished difference. Result has 258 places, 414 transitions, 5972 flow [2024-06-27 21:27:47,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5655, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5972, PETRI_PLACES=258, PETRI_TRANSITIONS=414} [2024-06-27 21:27:47,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-27 21:27:47,676 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 414 transitions, 5972 flow [2024-06-27 21:27:47,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:47,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:47,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:47,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:27:47,677 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:47,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:47,677 INFO L85 PathProgramCache]: Analyzing trace with hash -660519203, now seen corresponding path program 6 times [2024-06-27 21:27:47,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:47,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447210130] [2024-06-27 21:27:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:47,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:48,899 INFO 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 21:27:48,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:48,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447210130] [2024-06-27 21:27:48,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447210130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:48,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:48,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495806667] [2024-06-27 21:27:48,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:48,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:49,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:49,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 414 transitions, 5972 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:49,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:49,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:49,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:50,453 INFO L124 PetriNetUnfolderBase]: 3568/5349 cut-off events. [2024-06-27 21:27:50,453 INFO L125 PetriNetUnfolderBase]: For 283248/283250 co-relation queries the response was YES. [2024-06-27 21:27:50,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41679 conditions, 5349 events. 3568/5349 cut-off events. For 283248/283250 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28155 event pairs, 912 based on Foata normal form. 6/5354 useless extension candidates. Maximal degree in co-relation 41562. Up to 4806 conditions per place. [2024-06-27 21:27:50,518 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 345 selfloop transitions, 104 changer transitions 0/452 dead transitions. [2024-06-27 21:27:50,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 452 transitions, 7064 flow [2024-06-27 21:27:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:27:50,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-27 21:27:50,537 INFO L175 Difference]: Start difference. First operand has 258 places, 414 transitions, 5972 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:27:50,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 452 transitions, 7064 flow [2024-06-27 21:27:51,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 452 transitions, 6789 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:51,194 INFO L231 Difference]: Finished difference. Result has 261 places, 417 transitions, 5993 flow [2024-06-27 21:27:51,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5697, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5993, PETRI_PLACES=261, PETRI_TRANSITIONS=417} [2024-06-27 21:27:51,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-27 21:27:51,195 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 417 transitions, 5993 flow [2024-06-27 21:27:51,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:51,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:51,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:51,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:27:51,196 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:51,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:51,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1384446369, now seen corresponding path program 7 times [2024-06-27 21:27:51,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:51,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232011285] [2024-06-27 21:27:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:52,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:52,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232011285] [2024-06-27 21:27:52,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232011285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:52,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:52,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:52,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986635845] [2024-06-27 21:27:52,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:52,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:52,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:52,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:52,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 417 transitions, 5993 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:52,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:52,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:52,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:53,724 INFO L124 PetriNetUnfolderBase]: 3590/5369 cut-off events. [2024-06-27 21:27:53,724 INFO L125 PetriNetUnfolderBase]: For 256919/256919 co-relation queries the response was YES. [2024-06-27 21:27:53,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40844 conditions, 5369 events. 3590/5369 cut-off events. For 256919/256919 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28042 event pairs, 672 based on Foata normal form. 4/5372 useless extension candidates. Maximal degree in co-relation 40726. Up to 4616 conditions per place. [2024-06-27 21:27:53,786 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 323 selfloop transitions, 130 changer transitions 0/456 dead transitions. [2024-06-27 21:27:53,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 456 transitions, 7109 flow [2024-06-27 21:27:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:27:53,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 21:27:53,788 INFO L175 Difference]: Start difference. First operand has 261 places, 417 transitions, 5993 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:27:53,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 456 transitions, 7109 flow [2024-06-27 21:27:54,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 456 transitions, 6851 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:54,437 INFO L231 Difference]: Finished difference. Result has 263 places, 420 transitions, 6079 flow [2024-06-27 21:27:54,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5747, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6079, PETRI_PLACES=263, PETRI_TRANSITIONS=420} [2024-06-27 21:27:54,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 21:27:54,437 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 420 transitions, 6079 flow [2024-06-27 21:27:54,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:54,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:54,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:54,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:27:54,438 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:54,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:54,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1384624309, now seen corresponding path program 9 times [2024-06-27 21:27:54,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:54,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405142430] [2024-06-27 21:27:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:54,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:55,382 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 21:27:55,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405142430] [2024-06-27 21:27:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405142430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:55,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:55,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:55,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319449871] [2024-06-27 21:27:55,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:55,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:55,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:55,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:55,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:27:55,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 420 transitions, 6079 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:55,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:55,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:27:55,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:56,730 INFO L124 PetriNetUnfolderBase]: 3281/4979 cut-off events. [2024-06-27 21:27:56,730 INFO L125 PetriNetUnfolderBase]: For 263559/263849 co-relation queries the response was YES. [2024-06-27 21:27:56,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39021 conditions, 4979 events. 3281/4979 cut-off events. For 263559/263849 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26349 event pairs, 569 based on Foata normal form. 61/4893 useless extension candidates. Maximal degree in co-relation 38902. Up to 4171 conditions per place. [2024-06-27 21:27:56,790 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 225 selfloop transitions, 151 changer transitions 0/451 dead transitions. [2024-06-27 21:27:56,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 451 transitions, 7001 flow [2024-06-27 21:27:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:27:56,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 21:27:56,792 INFO L175 Difference]: Start difference. First operand has 263 places, 420 transitions, 6079 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:27:56,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 451 transitions, 7001 flow [2024-06-27 21:27:57,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 451 transitions, 6703 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:57,525 INFO L231 Difference]: Finished difference. Result has 264 places, 422 transitions, 6157 flow [2024-06-27 21:27:57,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5781, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6157, PETRI_PLACES=264, PETRI_TRANSITIONS=422} [2024-06-27 21:27:57,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-27 21:27:57,526 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 422 transitions, 6157 flow [2024-06-27 21:27:57,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:57,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:57,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:57,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:27:57,526 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:57,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:57,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1384619349, now seen corresponding path program 8 times [2024-06-27 21:27:57,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:57,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323899693] [2024-06-27 21:27:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:57,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:58,739 INFO 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 21:27:58,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:58,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323899693] [2024-06-27 21:27:58,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323899693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:58,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:58,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:58,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580578874] [2024-06-27 21:27:58,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:58,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:58,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:58,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:58,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:58,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:58,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 422 transitions, 6157 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:58,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:58,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:58,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:00,186 INFO L124 PetriNetUnfolderBase]: 3637/5440 cut-off events. [2024-06-27 21:28:00,187 INFO L125 PetriNetUnfolderBase]: For 251588/251588 co-relation queries the response was YES. [2024-06-27 21:28:00,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41317 conditions, 5440 events. 3637/5440 cut-off events. For 251588/251588 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28461 event pairs, 691 based on Foata normal form. 4/5443 useless extension candidates. Maximal degree in co-relation 41197. Up to 4687 conditions per place. [2024-06-27 21:28:00,246 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 336 selfloop transitions, 121 changer transitions 0/460 dead transitions. [2024-06-27 21:28:00,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 460 transitions, 7263 flow [2024-06-27 21:28:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:28:00,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 21:28:00,248 INFO L175 Difference]: Start difference. First operand has 264 places, 422 transitions, 6157 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:28:00,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 460 transitions, 7263 flow [2024-06-27 21:28:00,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 460 transitions, 6911 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:00,776 INFO L231 Difference]: Finished difference. Result has 267 places, 425 transitions, 6119 flow [2024-06-27 21:28:00,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5805, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6119, PETRI_PLACES=267, PETRI_TRANSITIONS=425} [2024-06-27 21:28:00,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-27 21:28:00,777 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 425 transitions, 6119 flow [2024-06-27 21:28:00,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:00,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:00,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:00,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:28:00,778 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:00,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:00,778 INFO L85 PathProgramCache]: Analyzing trace with hash 59785463, now seen corresponding path program 2 times [2024-06-27 21:28:00,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:00,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813709754] [2024-06-27 21:28:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:01,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:01,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813709754] [2024-06-27 21:28:01,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813709754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:01,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:01,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095160760] [2024-06-27 21:28:01,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:01,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:01,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 425 transitions, 6119 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:01,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:01,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:01,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:02,758 INFO L124 PetriNetUnfolderBase]: 3667/5484 cut-off events. [2024-06-27 21:28:02,759 INFO L125 PetriNetUnfolderBase]: For 249229/249231 co-relation queries the response was YES. [2024-06-27 21:28:02,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41272 conditions, 5484 events. 3667/5484 cut-off events. For 249229/249231 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28811 event pairs, 1196 based on Foata normal form. 6/5489 useless extension candidates. Maximal degree in co-relation 41151. Up to 5268 conditions per place. [2024-06-27 21:28:02,820 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 384 selfloop transitions, 69 changer transitions 0/456 dead transitions. [2024-06-27 21:28:02,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 456 transitions, 7330 flow [2024-06-27 21:28:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 21:28:02,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-27 21:28:02,822 INFO L175 Difference]: Start difference. First operand has 267 places, 425 transitions, 6119 flow. Second operand 7 states and 117 transitions. [2024-06-27 21:28:02,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 456 transitions, 7330 flow [2024-06-27 21:28:03,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 456 transitions, 7048 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 21:28:03,335 INFO L231 Difference]: Finished difference. Result has 268 places, 435 transitions, 6170 flow [2024-06-27 21:28:03,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6170, PETRI_PLACES=268, PETRI_TRANSITIONS=435} [2024-06-27 21:28:03,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 21:28:03,335 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 435 transitions, 6170 flow [2024-06-27 21:28:03,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:03,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:03,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:03,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:28:03,336 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:03,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:03,336 INFO L85 PathProgramCache]: Analyzing trace with hash 505510697, now seen corresponding path program 10 times [2024-06-27 21:28:03,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:03,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220498065] [2024-06-27 21:28:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:03,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:04,687 INFO 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 21:28:04,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:04,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220498065] [2024-06-27 21:28:04,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220498065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:04,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:04,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:04,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048401136] [2024-06-27 21:28:04,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:04,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:04,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:04,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:04,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:04,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:28:04,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 435 transitions, 6170 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:28:04,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:04,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:28:04,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:05,911 INFO L124 PetriNetUnfolderBase]: 3334/5052 cut-off events. [2024-06-27 21:28:05,911 INFO L125 PetriNetUnfolderBase]: For 255710/256008 co-relation queries the response was YES. [2024-06-27 21:28:05,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38590 conditions, 5052 events. 3334/5052 cut-off events. For 255710/256008 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 26747 event pairs, 588 based on Foata normal form. 61/4958 useless extension candidates. Maximal degree in co-relation 38467. Up to 4196 conditions per place. [2024-06-27 21:28:05,976 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 232 selfloop transitions, 157 changer transitions 0/465 dead transitions. [2024-06-27 21:28:05,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 465 transitions, 7118 flow [2024-06-27 21:28:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:05,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:28:05,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 21:28:05,978 INFO L175 Difference]: Start difference. First operand has 268 places, 435 transitions, 6170 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:28:05,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 465 transitions, 7118 flow [2024-06-27 21:28:06,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 465 transitions, 6996 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:06,532 INFO L231 Difference]: Finished difference. Result has 272 places, 437 transitions, 6432 flow [2024-06-27 21:28:06,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6048, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6432, PETRI_PLACES=272, PETRI_TRANSITIONS=437} [2024-06-27 21:28:06,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-27 21:28:06,533 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 437 transitions, 6432 flow [2024-06-27 21:28:06,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:28:06,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:06,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:06,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:28:06,534 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:06,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:06,534 INFO L85 PathProgramCache]: Analyzing trace with hash -126474035, now seen corresponding path program 9 times [2024-06-27 21:28:06,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:06,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106269924] [2024-06-27 21:28:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:06,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:07,831 INFO 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 21:28:07,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:07,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106269924] [2024-06-27 21:28:07,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106269924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:07,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:07,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:07,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999789951] [2024-06-27 21:28:07,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:07,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:07,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:07,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:07,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 437 transitions, 6432 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:07,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:07,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:07,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:09,122 INFO L124 PetriNetUnfolderBase]: 3676/5499 cut-off events. [2024-06-27 21:28:09,123 INFO L125 PetriNetUnfolderBase]: For 247041/247041 co-relation queries the response was YES. [2024-06-27 21:28:09,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41191 conditions, 5499 events. 3676/5499 cut-off events. For 247041/247041 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 28745 event pairs, 679 based on Foata normal form. 4/5495 useless extension candidates. Maximal degree in co-relation 41068. Up to 4224 conditions per place. [2024-06-27 21:28:09,190 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 302 selfloop transitions, 172 changer transitions 0/477 dead transitions. [2024-06-27 21:28:09,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 477 transitions, 7748 flow [2024-06-27 21:28:09,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:09,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:28:09,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 21:28:09,191 INFO L175 Difference]: Start difference. First operand has 272 places, 437 transitions, 6432 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:28:09,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 477 transitions, 7748 flow [2024-06-27 21:28:09,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 477 transitions, 7384 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:09,664 INFO L231 Difference]: Finished difference. Result has 275 places, 440 transitions, 6474 flow [2024-06-27 21:28:09,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6474, PETRI_PLACES=275, PETRI_TRANSITIONS=440} [2024-06-27 21:28:09,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-27 21:28:09,665 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 440 transitions, 6474 flow [2024-06-27 21:28:09,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:09,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:09,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:09,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:28:09,669 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:09,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:09,669 INFO L85 PathProgramCache]: Analyzing trace with hash 505688637, now seen corresponding path program 10 times [2024-06-27 21:28:09,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:09,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754309368] [2024-06-27 21:28:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:09,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:10,843 INFO 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 21:28:10,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:10,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754309368] [2024-06-27 21:28:10,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754309368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:10,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:10,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:10,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985109042] [2024-06-27 21:28:10,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:10,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:11,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:11,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 440 transitions, 6474 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:11,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:11,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:11,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:12,419 INFO L124 PetriNetUnfolderBase]: 3698/5531 cut-off events. [2024-06-27 21:28:12,420 INFO L125 PetriNetUnfolderBase]: For 255151/255151 co-relation queries the response was YES. [2024-06-27 21:28:12,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41726 conditions, 5531 events. 3698/5531 cut-off events. For 255151/255151 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29020 event pairs, 692 based on Foata normal form. 4/5527 useless extension candidates. Maximal degree in co-relation 41602. Up to 4643 conditions per place. [2024-06-27 21:28:12,474 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 346 selfloop transitions, 130 changer transitions 0/479 dead transitions. [2024-06-27 21:28:12,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 479 transitions, 7634 flow [2024-06-27 21:28:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:28:12,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 21:28:12,476 INFO L175 Difference]: Start difference. First operand has 275 places, 440 transitions, 6474 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:28:12,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 479 transitions, 7634 flow [2024-06-27 21:28:12,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 479 transitions, 7338 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:12,896 INFO L231 Difference]: Finished difference. Result has 278 places, 443 transitions, 6512 flow [2024-06-27 21:28:12,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6181, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6512, PETRI_PLACES=278, PETRI_TRANSITIONS=443} [2024-06-27 21:28:12,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 21:28:12,897 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 443 transitions, 6512 flow [2024-06-27 21:28:12,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:12,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:12,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:12,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:28:12,898 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:12,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash 505515657, now seen corresponding path program 11 times [2024-06-27 21:28:12,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:12,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015465868] [2024-06-27 21:28:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:12,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:14,046 INFO 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 21:28:14,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:14,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015465868] [2024-06-27 21:28:14,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015465868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:14,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:14,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:14,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253693162] [2024-06-27 21:28:14,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:14,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:14,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:14,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:14,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 443 transitions, 6512 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:14,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:14,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:14,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:15,575 INFO L124 PetriNetUnfolderBase]: 3688/5517 cut-off events. [2024-06-27 21:28:15,575 INFO L125 PetriNetUnfolderBase]: For 260929/260929 co-relation queries the response was YES. [2024-06-27 21:28:15,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41501 conditions, 5517 events. 3688/5517 cut-off events. For 260929/260929 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28910 event pairs, 717 based on Foata normal form. 4/5513 useless extension candidates. Maximal degree in co-relation 41376. Up to 4235 conditions per place. [2024-06-27 21:28:15,638 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 310 selfloop transitions, 164 changer transitions 0/477 dead transitions. [2024-06-27 21:28:15,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 477 transitions, 7598 flow [2024-06-27 21:28:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:28:15,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 21:28:15,639 INFO L175 Difference]: Start difference. First operand has 278 places, 443 transitions, 6512 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:28:15,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 477 transitions, 7598 flow [2024-06-27 21:28:16,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 477 transitions, 7274 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:28:16,161 INFO L231 Difference]: Finished difference. Result has 280 places, 443 transitions, 6524 flow [2024-06-27 21:28:16,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6524, PETRI_PLACES=280, PETRI_TRANSITIONS=443} [2024-06-27 21:28:16,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-27 21:28:16,162 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 443 transitions, 6524 flow [2024-06-27 21:28:16,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:16,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:16,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:16,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:28:16,163 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:16,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash 443570423, now seen corresponding path program 3 times [2024-06-27 21:28:16,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:16,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027677193] [2024-06-27 21:28:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:16,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:16,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:16,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027677193] [2024-06-27 21:28:16,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027677193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:16,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:16,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:16,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439587788] [2024-06-27 21:28:16,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:16,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:16,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:16,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:16,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:16,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:16,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 443 transitions, 6524 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:16,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:16,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:16,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:18,003 INFO L124 PetriNetUnfolderBase]: 3708/5543 cut-off events. [2024-06-27 21:28:18,003 INFO L125 PetriNetUnfolderBase]: For 270044/270046 co-relation queries the response was YES. [2024-06-27 21:28:18,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41909 conditions, 5543 events. 3708/5543 cut-off events. For 270044/270046 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29188 event pairs, 1205 based on Foata normal form. 6/5548 useless extension candidates. Maximal degree in co-relation 41783. Up to 5315 conditions per place. [2024-06-27 21:28:18,066 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 396 selfloop transitions, 68 changer transitions 0/467 dead transitions. [2024-06-27 21:28:18,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 467 transitions, 7676 flow [2024-06-27 21:28:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:28:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:28:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 21:28:18,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:28:18,068 INFO L175 Difference]: Start difference. First operand has 280 places, 443 transitions, 6524 flow. Second operand 6 states and 105 transitions. [2024-06-27 21:28:18,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 467 transitions, 7676 flow [2024-06-27 21:28:18,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 467 transitions, 7153 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 21:28:18,633 INFO L231 Difference]: Finished difference. Result has 277 places, 448 transitions, 6231 flow [2024-06-27 21:28:18,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6005, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6231, PETRI_PLACES=277, PETRI_TRANSITIONS=448} [2024-06-27 21:28:18,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-27 21:28:18,634 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 448 transitions, 6231 flow [2024-06-27 21:28:18,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:18,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:18,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:18,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:28:18,634 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:18,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2109064589, now seen corresponding path program 4 times [2024-06-27 21:28:18,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:18,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352605330] [2024-06-27 21:28:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:18,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:19,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:19,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352605330] [2024-06-27 21:28:19,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352605330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:19,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:19,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:19,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218690945] [2024-06-27 21:28:19,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:19,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:19,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:19,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:19,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:19,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 448 transitions, 6231 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:19,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:19,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:19,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:20,502 INFO L124 PetriNetUnfolderBase]: 3696/5527 cut-off events. [2024-06-27 21:28:20,503 INFO L125 PetriNetUnfolderBase]: For 261866/261868 co-relation queries the response was YES. [2024-06-27 21:28:20,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40473 conditions, 5527 events. 3696/5527 cut-off events. For 261866/261868 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 29133 event pairs, 1203 based on Foata normal form. 6/5532 useless extension candidates. Maximal degree in co-relation 40346. Up to 5363 conditions per place. [2024-06-27 21:28:20,568 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 405 selfloop transitions, 55 changer transitions 0/463 dead transitions. [2024-06-27 21:28:20,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 463 transitions, 7206 flow [2024-06-27 21:28:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:28:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:28:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-27 21:28:20,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-27 21:28:20,569 INFO L175 Difference]: Start difference. First operand has 277 places, 448 transitions, 6231 flow. Second operand 5 states and 91 transitions. [2024-06-27 21:28:20,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 463 transitions, 7206 flow [2024-06-27 21:28:21,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 463 transitions, 7058 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:21,085 INFO L231 Difference]: Finished difference. Result has 278 places, 448 transitions, 6244 flow [2024-06-27 21:28:21,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6244, PETRI_PLACES=278, PETRI_TRANSITIONS=448} [2024-06-27 21:28:21,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 21:28:21,086 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 448 transitions, 6244 flow [2024-06-27 21:28:21,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:21,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:21,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:21,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:28:21,087 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:21,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:21,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1976531925, now seen corresponding path program 1 times [2024-06-27 21:28:21,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:21,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380287965] [2024-06-27 21:28:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:21,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:21,627 INFO 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 21:28:21,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:21,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380287965] [2024-06-27 21:28:21,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380287965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:21,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:21,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:21,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229686116] [2024-06-27 21:28:21,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:21,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:21,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:21,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:21,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:21,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 448 transitions, 6244 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:21,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:21,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:21,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:22,858 INFO L124 PetriNetUnfolderBase]: 3727/5584 cut-off events. [2024-06-27 21:28:22,859 INFO L125 PetriNetUnfolderBase]: For 263758/263758 co-relation queries the response was YES. [2024-06-27 21:28:22,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40782 conditions, 5584 events. 3727/5584 cut-off events. For 263758/263758 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29644 event pairs, 1487 based on Foata normal form. 3/5586 useless extension candidates. Maximal degree in co-relation 40655. Up to 5468 conditions per place. [2024-06-27 21:28:22,923 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 448 selfloop transitions, 24 changer transitions 0/475 dead transitions. [2024-06-27 21:28:22,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 475 transitions, 7466 flow [2024-06-27 21:28:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:28:22,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-27 21:28:22,924 INFO L175 Difference]: Start difference. First operand has 278 places, 448 transitions, 6244 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:28:22,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 475 transitions, 7466 flow [2024-06-27 21:28:23,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 475 transitions, 7356 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:23,451 INFO L231 Difference]: Finished difference. Result has 281 places, 454 transitions, 6254 flow [2024-06-27 21:28:23,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6134, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6254, PETRI_PLACES=281, PETRI_TRANSITIONS=454} [2024-06-27 21:28:23,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 21:28:23,451 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 454 transitions, 6254 flow [2024-06-27 21:28:23,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:23,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:23,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:23,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:28:23,452 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:23,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:23,452 INFO L85 PathProgramCache]: Analyzing trace with hash 266653981, now seen corresponding path program 2 times [2024-06-27 21:28:23,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:23,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211438645] [2024-06-27 21:28:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:23,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:23,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:23,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211438645] [2024-06-27 21:28:23,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211438645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:23,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:23,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:23,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500408258] [2024-06-27 21:28:23,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:23,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:23,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:23,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:23,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:24,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:24,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 454 transitions, 6254 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:24,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:24,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:24,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:25,320 INFO L124 PetriNetUnfolderBase]: 3757/5626 cut-off events. [2024-06-27 21:28:25,320 INFO L125 PetriNetUnfolderBase]: For 274879/274879 co-relation queries the response was YES. [2024-06-27 21:28:25,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41488 conditions, 5626 events. 3757/5626 cut-off events. For 274879/274879 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29903 event pairs, 1489 based on Foata normal form. 3/5628 useless extension candidates. Maximal degree in co-relation 41360. Up to 5526 conditions per place. [2024-06-27 21:28:25,388 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 24 changer transitions 0/479 dead transitions. [2024-06-27 21:28:25,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 479 transitions, 7376 flow [2024-06-27 21:28:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:28:25,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-27 21:28:25,390 INFO L175 Difference]: Start difference. First operand has 281 places, 454 transitions, 6254 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:28:25,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 479 transitions, 7376 flow [2024-06-27 21:28:26,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 479 transitions, 7325 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 21:28:26,055 INFO L231 Difference]: Finished difference. Result has 285 places, 462 transitions, 6345 flow [2024-06-27 21:28:26,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6210, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6345, PETRI_PLACES=285, PETRI_TRANSITIONS=462} [2024-06-27 21:28:26,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-27 21:28:26,056 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 462 transitions, 6345 flow [2024-06-27 21:28:26,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:26,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:26,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:26,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:28:26,057 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:26,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:26,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2109288285, now seen corresponding path program 1 times [2024-06-27 21:28:26,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:26,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770418289] [2024-06-27 21:28:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:26,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:26,768 INFO 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 21:28:26,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770418289] [2024-06-27 21:28:26,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770418289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:26,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:26,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:26,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452089886] [2024-06-27 21:28:26,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:26,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:26,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:26,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:26,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:26,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:26,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 462 transitions, 6345 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:26,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:26,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:26,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:28,088 INFO L124 PetriNetUnfolderBase]: 3751/5618 cut-off events. [2024-06-27 21:28:28,088 INFO L125 PetriNetUnfolderBase]: For 281718/281718 co-relation queries the response was YES. [2024-06-27 21:28:28,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41576 conditions, 5618 events. 3751/5618 cut-off events. For 281718/281718 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29799 event pairs, 1478 based on Foata normal form. 2/5619 useless extension candidates. Maximal degree in co-relation 41446. Up to 5517 conditions per place. [2024-06-27 21:28:28,144 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 449 selfloop transitions, 25 changer transitions 0/477 dead transitions. [2024-06-27 21:28:28,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 477 transitions, 7389 flow [2024-06-27 21:28:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:28:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:28:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-27 21:28:28,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-27 21:28:28,147 INFO L175 Difference]: Start difference. First operand has 285 places, 462 transitions, 6345 flow. Second operand 5 states and 87 transitions. [2024-06-27 21:28:28,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 477 transitions, 7389 flow [2024-06-27 21:28:28,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 477 transitions, 7322 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:28,785 INFO L231 Difference]: Finished difference. Result has 286 places, 465 transitions, 6408 flow [2024-06-27 21:28:28,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6278, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6408, PETRI_PLACES=286, PETRI_TRANSITIONS=465} [2024-06-27 21:28:28,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-27 21:28:28,786 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 465 transitions, 6408 flow [2024-06-27 21:28:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:28,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:28,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:28,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:28:28,787 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:28,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2109294981, now seen corresponding path program 3 times [2024-06-27 21:28:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:28,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511885777] [2024-06-27 21:28:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:28,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:29,239 INFO 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 21:28:29,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:29,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511885777] [2024-06-27 21:28:29,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511885777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:29,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:29,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:29,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530640493] [2024-06-27 21:28:29,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:29,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:29,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:29,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:29,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 465 transitions, 6408 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:29,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:29,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:29,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:30,427 INFO L124 PetriNetUnfolderBase]: 3742/5606 cut-off events. [2024-06-27 21:28:30,427 INFO L125 PetriNetUnfolderBase]: For 287906/287906 co-relation queries the response was YES. [2024-06-27 21:28:30,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41810 conditions, 5606 events. 3742/5606 cut-off events. For 287906/287906 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29751 event pairs, 1486 based on Foata normal form. 3/5608 useless extension candidates. Maximal degree in co-relation 41679. Up to 5506 conditions per place. [2024-06-27 21:28:30,495 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 458 selfloop transitions, 22 changer transitions 0/483 dead transitions. [2024-06-27 21:28:30,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 483 transitions, 7467 flow [2024-06-27 21:28:30,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:28:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:28:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 21:28:30,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:28:30,496 INFO L175 Difference]: Start difference. First operand has 286 places, 465 transitions, 6408 flow. Second operand 6 states and 102 transitions. [2024-06-27 21:28:30,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 483 transitions, 7467 flow [2024-06-27 21:28:31,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 483 transitions, 7385 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 21:28:31,097 INFO L231 Difference]: Finished difference. Result has 289 places, 465 transitions, 6381 flow [2024-06-27 21:28:31,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6326, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6381, PETRI_PLACES=289, PETRI_TRANSITIONS=465} [2024-06-27 21:28:31,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-27 21:28:31,097 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 465 transitions, 6381 flow [2024-06-27 21:28:31,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 21:28:31,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:31,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:31,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:28:31,098 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:31,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:31,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2109048717, now seen corresponding path program 1 times [2024-06-27 21:28:31,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:31,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199410177] [2024-06-27 21:28:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:31,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:31,978 INFO 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 21:28:31,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:31,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199410177] [2024-06-27 21:28:31,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199410177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:31,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:31,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:31,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107287994] [2024-06-27 21:28:31,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:31,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:32,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:32,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 465 transitions, 6381 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:32,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:32,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:32,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:33,210 INFO L124 PetriNetUnfolderBase]: 3737/5599 cut-off events. [2024-06-27 21:28:33,210 INFO L125 PetriNetUnfolderBase]: For 294158/294158 co-relation queries the response was YES. [2024-06-27 21:28:33,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41803 conditions, 5599 events. 3737/5599 cut-off events. For 294158/294158 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29642 event pairs, 1480 based on Foata normal form. 2/5600 useless extension candidates. Maximal degree in co-relation 41671. Up to 5527 conditions per place. [2024-06-27 21:28:33,284 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 461 selfloop transitions, 12 changer transitions 0/476 dead transitions. [2024-06-27 21:28:33,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 476 transitions, 7383 flow [2024-06-27 21:28:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:28:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:28:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-27 21:28:33,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-27 21:28:33,286 INFO L175 Difference]: Start difference. First operand has 289 places, 465 transitions, 6381 flow. Second operand 5 states and 81 transitions. [2024-06-27 21:28:33,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 476 transitions, 7383 flow [2024-06-27 21:28:33,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 476 transitions, 7328 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:33,937 INFO L231 Difference]: Finished difference. Result has 289 places, 467 transitions, 6387 flow [2024-06-27 21:28:33,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6326, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6387, PETRI_PLACES=289, PETRI_TRANSITIONS=467} [2024-06-27 21:28:33,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-27 21:28:33,937 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 467 transitions, 6387 flow [2024-06-27 21:28:33,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:33,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:33,938 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 21:28:33,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:28:33,938 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:33,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:33,938 INFO L85 PathProgramCache]: Analyzing trace with hash -75225924, now seen corresponding path program 1 times [2024-06-27 21:28:33,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:33,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672000358] [2024-06-27 21:28:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:33,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:35,050 INFO 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 21:28:35,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672000358] [2024-06-27 21:28:35,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672000358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:35,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:35,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:28:35,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614544421] [2024-06-27 21:28:35,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:35,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:28:35,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:35,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:28:35,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:28:35,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:35,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 467 transitions, 6387 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:35,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:35,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:35,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:36,552 INFO L124 PetriNetUnfolderBase]: 3754/5616 cut-off events. [2024-06-27 21:28:36,553 INFO L125 PetriNetUnfolderBase]: For 303353/303355 co-relation queries the response was YES. [2024-06-27 21:28:36,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42208 conditions, 5616 events. 3754/5616 cut-off events. For 303353/303355 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29676 event pairs, 877 based on Foata normal form. 6/5621 useless extension candidates. Maximal degree in co-relation 42075. Up to 5282 conditions per place. [2024-06-27 21:28:36,632 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 453 selfloop transitions, 63 changer transitions 0/519 dead transitions. [2024-06-27 21:28:36,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 519 transitions, 7696 flow [2024-06-27 21:28:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 21:28:36,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-27 21:28:36,633 INFO L175 Difference]: Start difference. First operand has 289 places, 467 transitions, 6387 flow. Second operand 10 states and 163 transitions. [2024-06-27 21:28:36,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 519 transitions, 7696 flow [2024-06-27 21:28:37,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 519 transitions, 7651 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:28:37,489 INFO L231 Difference]: Finished difference. Result has 298 places, 477 transitions, 6635 flow [2024-06-27 21:28:37,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6342, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6635, PETRI_PLACES=298, PETRI_TRANSITIONS=477} [2024-06-27 21:28:37,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-27 21:28:37,490 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 477 transitions, 6635 flow [2024-06-27 21:28:37,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:37,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:37,490 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 21:28:37,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:28:37,490 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:37,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash 985721796, now seen corresponding path program 2 times [2024-06-27 21:28:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:37,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504663306] [2024-06-27 21:28:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:37,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:38,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:38,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504663306] [2024-06-27 21:28:38,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504663306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:38,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:38,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:38,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530872063] [2024-06-27 21:28:38,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:38,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:38,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:38,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:38,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 477 transitions, 6635 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:38,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:38,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:38,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:40,261 INFO L124 PetriNetUnfolderBase]: 3771/5651 cut-off events. [2024-06-27 21:28:40,261 INFO L125 PetriNetUnfolderBase]: For 315415/315417 co-relation queries the response was YES. [2024-06-27 21:28:40,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43109 conditions, 5651 events. 3771/5651 cut-off events. For 315415/315417 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29951 event pairs, 897 based on Foata normal form. 6/5656 useless extension candidates. Maximal degree in co-relation 42973. Up to 5308 conditions per place. [2024-06-27 21:28:40,338 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 442 selfloop transitions, 75 changer transitions 0/520 dead transitions. [2024-06-27 21:28:40,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 520 transitions, 7853 flow [2024-06-27 21:28:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:28:40,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:28:40,340 INFO L175 Difference]: Start difference. First operand has 298 places, 477 transitions, 6635 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:28:40,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 520 transitions, 7853 flow [2024-06-27 21:28:41,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 520 transitions, 7757 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:41,162 INFO L231 Difference]: Finished difference. Result has 304 places, 479 transitions, 6734 flow [2024-06-27 21:28:41,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6539, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6734, PETRI_PLACES=304, PETRI_TRANSITIONS=479} [2024-06-27 21:28:41,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-27 21:28:41,163 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 479 transitions, 6734 flow [2024-06-27 21:28:41,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:41,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:41,163 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 21:28:41,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:28:41,163 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:41,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:41,163 INFO L85 PathProgramCache]: Analyzing trace with hash 986727126, now seen corresponding path program 3 times [2024-06-27 21:28:41,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:41,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760452136] [2024-06-27 21:28:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:41,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:42,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:42,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760452136] [2024-06-27 21:28:42,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760452136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:42,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:42,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:28:42,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840497201] [2024-06-27 21:28:42,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:42,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:28:42,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:28:42,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:28:42,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:42,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 479 transitions, 6734 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:42,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:42,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:42,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:43,962 INFO L124 PetriNetUnfolderBase]: 3788/5672 cut-off events. [2024-06-27 21:28:43,963 INFO L125 PetriNetUnfolderBase]: For 327948/327950 co-relation queries the response was YES. [2024-06-27 21:28:44,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43768 conditions, 5672 events. 3788/5672 cut-off events. For 327948/327950 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30037 event pairs, 880 based on Foata normal form. 6/5677 useless extension candidates. Maximal degree in co-relation 43630. Up to 5259 conditions per place. [2024-06-27 21:28:44,040 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 446 selfloop transitions, 77 changer transitions 0/526 dead transitions. [2024-06-27 21:28:44,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 526 transitions, 8008 flow [2024-06-27 21:28:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:28:44,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:28:44,042 INFO L175 Difference]: Start difference. First operand has 304 places, 479 transitions, 6734 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:28:44,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 526 transitions, 8008 flow [2024-06-27 21:28:45,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 526 transitions, 7814 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 21:28:45,027 INFO L231 Difference]: Finished difference. Result has 306 places, 485 transitions, 6804 flow [2024-06-27 21:28:45,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6540, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6804, PETRI_PLACES=306, PETRI_TRANSITIONS=485} [2024-06-27 21:28:45,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-27 21:28:45,028 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 485 transitions, 6804 flow [2024-06-27 21:28:45,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:45,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:45,028 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 21:28:45,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:28:45,028 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:45,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:45,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1686640904, now seen corresponding path program 4 times [2024-06-27 21:28:45,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:45,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456865358] [2024-06-27 21:28:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:45,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:46,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:46,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456865358] [2024-06-27 21:28:46,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456865358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:46,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:46,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:28:46,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905235889] [2024-06-27 21:28:46,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:46,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:28:46,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:46,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:28:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:28:46,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:46,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 485 transitions, 6804 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:46,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:46,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:46,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:47,924 INFO L124 PetriNetUnfolderBase]: 3816/5714 cut-off events. [2024-06-27 21:28:47,924 INFO L125 PetriNetUnfolderBase]: For 339665/339667 co-relation queries the response was YES. [2024-06-27 21:28:47,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44417 conditions, 5714 events. 3816/5714 cut-off events. For 339665/339667 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 30294 event pairs, 726 based on Foata normal form. 6/5719 useless extension candidates. Maximal degree in co-relation 44277. Up to 5295 conditions per place. [2024-06-27 21:28:47,986 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 465 selfloop transitions, 72 changer transitions 0/540 dead transitions. [2024-06-27 21:28:47,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 540 transitions, 8216 flow [2024-06-27 21:28:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:47,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:28:47,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-27 21:28:47,987 INFO L175 Difference]: Start difference. First operand has 306 places, 485 transitions, 6804 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:28:47,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 540 transitions, 8216 flow [2024-06-27 21:28:48,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 540 transitions, 8083 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:48,864 INFO L231 Difference]: Finished difference. Result has 313 places, 500 transitions, 7074 flow [2024-06-27 21:28:48,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6671, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7074, PETRI_PLACES=313, PETRI_TRANSITIONS=500} [2024-06-27 21:28:48,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-27 21:28:48,865 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 500 transitions, 7074 flow [2024-06-27 21:28:48,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:48,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:48,865 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 21:28:48,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:28:48,866 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:48,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:48,866 INFO L85 PathProgramCache]: Analyzing trace with hash 417137400, now seen corresponding path program 1 times [2024-06-27 21:28:48,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:48,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251693236] [2024-06-27 21:28:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:50,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:50,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251693236] [2024-06-27 21:28:50,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251693236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:50,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:50,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:28:50,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910393788] [2024-06-27 21:28:50,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:50,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:28:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:50,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:28:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:28:50,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:50,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 500 transitions, 7074 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:50,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:50,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:50,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:51,857 INFO L124 PetriNetUnfolderBase]: 3891/5845 cut-off events. [2024-06-27 21:28:51,857 INFO L125 PetriNetUnfolderBase]: For 371869/371871 co-relation queries the response was YES. [2024-06-27 21:28:51,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45749 conditions, 5845 events. 3891/5845 cut-off events. For 371869/371871 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31263 event pairs, 892 based on Foata normal form. 22/5866 useless extension candidates. Maximal degree in co-relation 45604. Up to 5357 conditions per place. [2024-06-27 21:28:51,950 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 468 selfloop transitions, 80 changer transitions 0/551 dead transitions. [2024-06-27 21:28:51,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 551 transitions, 8400 flow [2024-06-27 21:28:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:28:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:28:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 21:28:51,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035476718403548 [2024-06-27 21:28:51,952 INFO L175 Difference]: Start difference. First operand has 313 places, 500 transitions, 7074 flow. Second operand 11 states and 182 transitions. [2024-06-27 21:28:51,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 551 transitions, 8400 flow [2024-06-27 21:28:53,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 551 transitions, 8255 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:53,139 INFO L231 Difference]: Finished difference. Result has 320 places, 501 transitions, 7124 flow [2024-06-27 21:28:53,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6929, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7124, PETRI_PLACES=320, PETRI_TRANSITIONS=501} [2024-06-27 21:28:53,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-27 21:28:53,140 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 501 transitions, 7124 flow [2024-06-27 21:28:53,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:53,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:53,141 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 21:28:53,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:28:53,141 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:53,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1263323870, now seen corresponding path program 5 times [2024-06-27 21:28:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:53,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263267247] [2024-06-27 21:28:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:53,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:54,333 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 21:28:54,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:54,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263267247] [2024-06-27 21:28:54,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263267247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:54,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:54,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:28:54,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075617473] [2024-06-27 21:28:54,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:54,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:28:54,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:28:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:28:54,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:54,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 501 transitions, 7124 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:54,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:54,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:54,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:56,115 INFO L124 PetriNetUnfolderBase]: 3930/5894 cut-off events. [2024-06-27 21:28:56,115 INFO L125 PetriNetUnfolderBase]: For 361307/361309 co-relation queries the response was YES. [2024-06-27 21:28:56,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46366 conditions, 5894 events. 3930/5894 cut-off events. For 361307/361309 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31508 event pairs, 710 based on Foata normal form. 6/5899 useless extension candidates. Maximal degree in co-relation 46219. Up to 5552 conditions per place. [2024-06-27 21:28:56,182 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 478 selfloop transitions, 72 changer transitions 0/553 dead transitions. [2024-06-27 21:28:56,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 553 transitions, 8509 flow [2024-06-27 21:28:56,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:28:56,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:28:56,183 INFO L175 Difference]: Start difference. First operand has 320 places, 501 transitions, 7124 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:28:56,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 553 transitions, 8509 flow [2024-06-27 21:28:56,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 553 transitions, 8336 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 21:28:56,979 INFO L231 Difference]: Finished difference. Result has 323 places, 514 transitions, 7296 flow [2024-06-27 21:28:56,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6951, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7296, PETRI_PLACES=323, PETRI_TRANSITIONS=514} [2024-06-27 21:28:56,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-27 21:28:56,980 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 514 transitions, 7296 flow [2024-06-27 21:28:56,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:56,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:56,980 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 21:28:56,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:28:56,981 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:56,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 543826616, now seen corresponding path program 6 times [2024-06-27 21:28:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121778178] [2024-06-27 21:28:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:58,148 INFO 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 21:28:58,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:58,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121778178] [2024-06-27 21:28:58,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121778178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:58,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:58,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:28:58,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268941952] [2024-06-27 21:28:58,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:58,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:28:58,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:58,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:28:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:28:58,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:58,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 514 transitions, 7296 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:58,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:58,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:58,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:59,880 INFO L124 PetriNetUnfolderBase]: 3994/5996 cut-off events. [2024-06-27 21:28:59,880 INFO L125 PetriNetUnfolderBase]: For 380633/380635 co-relation queries the response was YES. [2024-06-27 21:28:59,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47562 conditions, 5996 events. 3994/5996 cut-off events. For 380633/380635 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32221 event pairs, 734 based on Foata normal form. 6/6001 useless extension candidates. Maximal degree in co-relation 47412. Up to 5547 conditions per place. [2024-06-27 21:28:59,951 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 478 selfloop transitions, 84 changer transitions 0/565 dead transitions. [2024-06-27 21:28:59,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 565 transitions, 8917 flow [2024-06-27 21:28:59,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:28:59,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-27 21:28:59,953 INFO L175 Difference]: Start difference. First operand has 323 places, 514 transitions, 7296 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:28:59,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 565 transitions, 8917 flow [2024-06-27 21:29:00,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 565 transitions, 8796 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:00,911 INFO L231 Difference]: Finished difference. Result has 329 places, 525 transitions, 7536 flow [2024-06-27 21:29:00,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7175, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7536, PETRI_PLACES=329, PETRI_TRANSITIONS=525} [2024-06-27 21:29:00,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-27 21:29:00,912 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 525 transitions, 7536 flow [2024-06-27 21:29:00,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:00,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:00,912 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 21:29:00,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:29:00,913 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:00,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:00,913 INFO L85 PathProgramCache]: Analyzing trace with hash 626947226, now seen corresponding path program 7 times [2024-06-27 21:29:00,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:00,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253520864] [2024-06-27 21:29:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:00,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:02,304 INFO 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 21:29:02,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:02,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253520864] [2024-06-27 21:29:02,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253520864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:02,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:02,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:02,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681456214] [2024-06-27 21:29:02,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:02,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:02,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:02,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:02,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:02,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 525 transitions, 7536 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:02,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:02,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:02,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:04,133 INFO L124 PetriNetUnfolderBase]: 3986/5986 cut-off events. [2024-06-27 21:29:04,133 INFO L125 PetriNetUnfolderBase]: For 388669/388671 co-relation queries the response was YES. [2024-06-27 21:29:04,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47949 conditions, 5986 events. 3986/5986 cut-off events. For 388669/388671 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32171 event pairs, 753 based on Foata normal form. 6/5991 useless extension candidates. Maximal degree in co-relation 47796. Up to 5632 conditions per place. [2024-06-27 21:29:04,206 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 479 selfloop transitions, 82 changer transitions 0/564 dead transitions. [2024-06-27 21:29:04,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 564 transitions, 8827 flow [2024-06-27 21:29:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 21:29:04,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-27 21:29:04,207 INFO L175 Difference]: Start difference. First operand has 329 places, 525 transitions, 7536 flow. Second operand 10 states and 166 transitions. [2024-06-27 21:29:04,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 564 transitions, 8827 flow [2024-06-27 21:29:05,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 564 transitions, 8632 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:05,280 INFO L231 Difference]: Finished difference. Result has 333 places, 526 transitions, 7549 flow [2024-06-27 21:29:05,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7363, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7549, PETRI_PLACES=333, PETRI_TRANSITIONS=526} [2024-06-27 21:29:05,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-27 21:29:05,281 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 526 transitions, 7549 flow [2024-06-27 21:29:05,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:05,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:05,282 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 21:29:05,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:29:05,282 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:05,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash 630672248, now seen corresponding path program 2 times [2024-06-27 21:29:05,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:05,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924359973] [2024-06-27 21:29:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:05,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:06,491 INFO 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 21:29:06,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:06,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924359973] [2024-06-27 21:29:06,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924359973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:06,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:06,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:06,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922458979] [2024-06-27 21:29:06,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:06,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:06,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:06,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:06,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:06,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:06,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 526 transitions, 7549 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:06,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:06,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:06,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:08,517 INFO L124 PetriNetUnfolderBase]: 4110/6190 cut-off events. [2024-06-27 21:29:08,518 INFO L125 PetriNetUnfolderBase]: For 423564/423566 co-relation queries the response was YES. [2024-06-27 21:29:08,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49136 conditions, 6190 events. 4110/6190 cut-off events. For 423564/423566 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 33676 event pairs, 785 based on Foata normal form. 22/6211 useless extension candidates. Maximal degree in co-relation 48981. Up to 5637 conditions per place. [2024-06-27 21:29:08,596 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 486 selfloop transitions, 86 changer transitions 0/575 dead transitions. [2024-06-27 21:29:08,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 575 transitions, 8923 flow [2024-06-27 21:29:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:29:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:29:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 21:29:08,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-27 21:29:08,598 INFO L175 Difference]: Start difference. First operand has 333 places, 526 transitions, 7549 flow. Second operand 11 states and 184 transitions. [2024-06-27 21:29:08,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 575 transitions, 8923 flow [2024-06-27 21:29:09,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 575 transitions, 8766 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:09,778 INFO L231 Difference]: Finished difference. Result has 336 places, 528 transitions, 7616 flow [2024-06-27 21:29:09,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7392, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7616, PETRI_PLACES=336, PETRI_TRANSITIONS=528} [2024-06-27 21:29:09,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-27 21:29:09,779 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 528 transitions, 7616 flow [2024-06-27 21:29:09,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:09,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:09,779 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 21:29:09,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:29:09,779 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:09,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash -90418880, now seen corresponding path program 8 times [2024-06-27 21:29:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:09,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777519350] [2024-06-27 21:29:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:09,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:11,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:11,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777519350] [2024-06-27 21:29:11,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777519350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:11,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:11,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:11,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165337254] [2024-06-27 21:29:11,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:11,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:11,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:11,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:11,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 528 transitions, 7616 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:11,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:11,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:11,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:13,419 INFO L124 PetriNetUnfolderBase]: 4127/6213 cut-off events. [2024-06-27 21:29:13,420 INFO L125 PetriNetUnfolderBase]: For 414338/414338 co-relation queries the response was YES. [2024-06-27 21:29:13,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49751 conditions, 6213 events. 4127/6213 cut-off events. For 414338/414338 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 33790 event pairs, 729 based on Foata normal form. 4/6216 useless extension candidates. Maximal degree in co-relation 49595. Up to 5662 conditions per place. [2024-06-27 21:29:13,520 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 468 selfloop transitions, 99 changer transitions 0/570 dead transitions. [2024-06-27 21:29:13,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 570 transitions, 8958 flow [2024-06-27 21:29:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:29:13,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-27 21:29:13,522 INFO L175 Difference]: Start difference. First operand has 336 places, 528 transitions, 7616 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:29:13,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 570 transitions, 8958 flow [2024-06-27 21:29:14,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 570 transitions, 8754 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-27 21:29:14,712 INFO L231 Difference]: Finished difference. Result has 336 places, 530 transitions, 7677 flow [2024-06-27 21:29:14,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7412, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7677, PETRI_PLACES=336, PETRI_TRANSITIONS=530} [2024-06-27 21:29:14,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-27 21:29:14,713 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 530 transitions, 7677 flow [2024-06-27 21:29:14,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:14,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:14,714 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 21:29:14,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:29:14,714 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:14,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:14,714 INFO L85 PathProgramCache]: Analyzing trace with hash -90422600, now seen corresponding path program 9 times [2024-06-27 21:29:14,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:14,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242867634] [2024-06-27 21:29:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:14,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:16,270 INFO 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 21:29:16,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:16,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242867634] [2024-06-27 21:29:16,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242867634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:16,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:16,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:16,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576458010] [2024-06-27 21:29:16,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:16,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:16,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:16,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:16,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 530 transitions, 7677 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:16,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:16,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:16,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:18,084 INFO L124 PetriNetUnfolderBase]: 4169/6279 cut-off events. [2024-06-27 21:29:18,085 INFO L125 PetriNetUnfolderBase]: For 434549/434549 co-relation queries the response was YES. [2024-06-27 21:29:18,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50802 conditions, 6279 events. 4169/6279 cut-off events. For 434549/434549 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 34242 event pairs, 743 based on Foata normal form. 4/6282 useless extension candidates. Maximal degree in co-relation 50645. Up to 5663 conditions per place. [2024-06-27 21:29:18,170 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 471 selfloop transitions, 103 changer transitions 0/577 dead transitions. [2024-06-27 21:29:18,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 577 transitions, 9331 flow [2024-06-27 21:29:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 21:29:18,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-27 21:29:18,171 INFO L175 Difference]: Start difference. First operand has 336 places, 530 transitions, 7677 flow. Second operand 10 states and 171 transitions. [2024-06-27 21:29:18,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 577 transitions, 9331 flow [2024-06-27 21:29:19,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 577 transitions, 9084 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:19,278 INFO L231 Difference]: Finished difference. Result has 339 places, 535 transitions, 7783 flow [2024-06-27 21:29:19,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7430, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7783, PETRI_PLACES=339, PETRI_TRANSITIONS=535} [2024-06-27 21:29:19,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-27 21:29:19,279 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 535 transitions, 7783 flow [2024-06-27 21:29:19,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:19,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:19,280 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 21:29:19,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:29:19,280 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:19,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash -84697148, now seen corresponding path program 3 times [2024-06-27 21:29:19,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:19,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102304853] [2024-06-27 21:29:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:19,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:20,246 INFO 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 21:29:20,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:20,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102304853] [2024-06-27 21:29:20,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102304853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:20,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:20,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:20,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363255658] [2024-06-27 21:29:20,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:20,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:20,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:20,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:20,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:20,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:20,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 535 transitions, 7783 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:29:20,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:20,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:20,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:22,094 INFO L124 PetriNetUnfolderBase]: 4338/6560 cut-off events. [2024-06-27 21:29:22,095 INFO L125 PetriNetUnfolderBase]: For 505434/505434 co-relation queries the response was YES. [2024-06-27 21:29:22,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53988 conditions, 6560 events. 4338/6560 cut-off events. For 505434/505434 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 36264 event pairs, 640 based on Foata normal form. 16/6570 useless extension candidates. Maximal degree in co-relation 53829. Up to 4454 conditions per place. [2024-06-27 21:29:22,202 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 382 selfloop transitions, 198 changer transitions 0/583 dead transitions. [2024-06-27 21:29:22,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 583 transitions, 9459 flow [2024-06-27 21:29:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:29:22,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:29:22,204 INFO L175 Difference]: Start difference. First operand has 339 places, 535 transitions, 7783 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:29:22,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 583 transitions, 9459 flow [2024-06-27 21:29:23,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 583 transitions, 9258 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:23,705 INFO L231 Difference]: Finished difference. Result has 342 places, 537 transitions, 8060 flow [2024-06-27 21:29:23,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7582, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8060, PETRI_PLACES=342, PETRI_TRANSITIONS=537} [2024-06-27 21:29:23,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-27 21:29:23,706 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 537 transitions, 8060 flow [2024-06-27 21:29:23,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:29:23,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:23,707 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 21:29:23,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:29:23,707 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:23,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:23,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1780211682, now seen corresponding path program 4 times [2024-06-27 21:29:23,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:23,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278051176] [2024-06-27 21:29:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:24,891 INFO 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 21:29:24,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:24,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278051176] [2024-06-27 21:29:24,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278051176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:24,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:24,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:24,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200445279] [2024-06-27 21:29:24,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:24,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:24,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:24,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:24,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:25,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:25,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 537 transitions, 8060 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:25,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:25,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:25,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:26,940 INFO L124 PetriNetUnfolderBase]: 4413/6683 cut-off events. [2024-06-27 21:29:26,941 INFO L125 PetriNetUnfolderBase]: For 529938/529938 co-relation queries the response was YES. [2024-06-27 21:29:27,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55833 conditions, 6683 events. 4413/6683 cut-off events. For 529938/529938 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 37338 event pairs, 803 based on Foata normal form. 20/6702 useless extension candidates. Maximal degree in co-relation 55672. Up to 5989 conditions per place. [2024-06-27 21:29:27,043 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 481 selfloop transitions, 103 changer transitions 0/587 dead transitions. [2024-06-27 21:29:27,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 587 transitions, 9472 flow [2024-06-27 21:29:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:29:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:29:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 21:29:27,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-27 21:29:27,045 INFO L175 Difference]: Start difference. First operand has 342 places, 537 transitions, 8060 flow. Second operand 11 states and 188 transitions. [2024-06-27 21:29:27,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 587 transitions, 9472 flow [2024-06-27 21:29:28,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 587 transitions, 9170 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:28,640 INFO L231 Difference]: Finished difference. Result has 348 places, 538 transitions, 8014 flow [2024-06-27 21:29:28,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8014, PETRI_PLACES=348, PETRI_TRANSITIONS=538} [2024-06-27 21:29:28,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-27 21:29:28,641 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 538 transitions, 8014 flow [2024-06-27 21:29:28,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:28,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:28,641 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 21:29:28,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:29:28,642 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:28,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:28,642 INFO L85 PathProgramCache]: Analyzing trace with hash -84912350, now seen corresponding path program 10 times [2024-06-27 21:29:28,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:28,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166900570] [2024-06-27 21:29:28,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:28,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:30,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:30,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166900570] [2024-06-27 21:29:30,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166900570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:30,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:30,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:30,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156779559] [2024-06-27 21:29:30,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:30,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:30,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:30,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:30,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:30,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:30,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 538 transitions, 8014 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:30,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:30,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:30,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:32,013 INFO L124 PetriNetUnfolderBase]: 4405/6671 cut-off events. [2024-06-27 21:29:32,014 INFO L125 PetriNetUnfolderBase]: For 503576/503576 co-relation queries the response was YES. [2024-06-27 21:29:32,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55270 conditions, 6671 events. 4405/6671 cut-off events. For 503576/503576 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 37264 event pairs, 810 based on Foata normal form. 4/6674 useless extension candidates. Maximal degree in co-relation 55107. Up to 6120 conditions per place. [2024-06-27 21:29:32,122 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 470 selfloop transitions, 107 changer transitions 0/580 dead transitions. [2024-06-27 21:29:32,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 580 transitions, 9347 flow [2024-06-27 21:29:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:29:32,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-27 21:29:32,123 INFO L175 Difference]: Start difference. First operand has 348 places, 538 transitions, 8014 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:29:32,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 580 transitions, 9347 flow [2024-06-27 21:29:33,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 580 transitions, 9089 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 21:29:33,567 INFO L231 Difference]: Finished difference. Result has 349 places, 539 transitions, 8000 flow [2024-06-27 21:29:33,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7770, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8000, PETRI_PLACES=349, PETRI_TRANSITIONS=539} [2024-06-27 21:29:33,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-27 21:29:33,567 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 539 transitions, 8000 flow [2024-06-27 21:29:33,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:33,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:33,568 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 21:29:33,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:29:33,568 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:33,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash -84704588, now seen corresponding path program 5 times [2024-06-27 21:29:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:33,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415408039] [2024-06-27 21:29:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:34,768 INFO 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 21:29:34,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:34,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415408039] [2024-06-27 21:29:34,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415408039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:34,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:34,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:34,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097119757] [2024-06-27 21:29:34,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:34,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:34,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:34,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:34,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:34,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:34,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 539 transitions, 8000 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:34,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:34,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:34,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:36,770 INFO L124 PetriNetUnfolderBase]: 4480/6796 cut-off events. [2024-06-27 21:29:36,770 INFO L125 PetriNetUnfolderBase]: For 545331/545331 co-relation queries the response was YES. [2024-06-27 21:29:36,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55947 conditions, 6796 events. 4480/6796 cut-off events. For 545331/545331 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 38169 event pairs, 747 based on Foata normal form. 20/6815 useless extension candidates. Maximal degree in co-relation 55783. Up to 5434 conditions per place. [2024-06-27 21:29:36,879 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 392 selfloop transitions, 191 changer transitions 0/586 dead transitions. [2024-06-27 21:29:36,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 586 transitions, 9394 flow [2024-06-27 21:29:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 21:29:36,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-27 21:29:36,882 INFO L175 Difference]: Start difference. First operand has 349 places, 539 transitions, 8000 flow. Second operand 10 states and 174 transitions. [2024-06-27 21:29:36,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 586 transitions, 9394 flow [2024-06-27 21:29:38,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 586 transitions, 9179 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:38,370 INFO L231 Difference]: Finished difference. Result has 351 places, 540 transitions, 8202 flow [2024-06-27 21:29:38,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7785, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8202, PETRI_PLACES=351, PETRI_TRANSITIONS=540} [2024-06-27 21:29:38,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-27 21:29:38,371 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 540 transitions, 8202 flow [2024-06-27 21:29:38,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:38,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:38,371 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 21:29:38,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:29:38,371 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:38,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash -84906398, now seen corresponding path program 6 times [2024-06-27 21:29:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:38,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165331028] [2024-06-27 21:29:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:39,497 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 21:29:39,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:39,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165331028] [2024-06-27 21:29:39,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165331028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:39,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:39,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:39,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048315148] [2024-06-27 21:29:39,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:39,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:39,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:39,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:39,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:39,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 540 transitions, 8202 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:39,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:39,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:39,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:41,508 INFO L124 PetriNetUnfolderBase]: 4555/6921 cut-off events. [2024-06-27 21:29:41,508 INFO L125 PetriNetUnfolderBase]: For 564138/564138 co-relation queries the response was YES. [2024-06-27 21:29:41,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57456 conditions, 6921 events. 4555/6921 cut-off events. For 564138/564138 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39229 event pairs, 826 based on Foata normal form. 20/6940 useless extension candidates. Maximal degree in co-relation 57291. Up to 6245 conditions per place. [2024-06-27 21:29:41,614 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 479 selfloop transitions, 109 changer transitions 0/591 dead transitions. [2024-06-27 21:29:41,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 591 transitions, 9618 flow [2024-06-27 21:29:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:29:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:29:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 21:29:41,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:29:41,616 INFO L175 Difference]: Start difference. First operand has 351 places, 540 transitions, 8202 flow. Second operand 11 states and 187 transitions. [2024-06-27 21:29:41,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 591 transitions, 9618 flow [2024-06-27 21:29:42,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 591 transitions, 9221 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:42,995 INFO L231 Difference]: Finished difference. Result has 354 places, 541 transitions, 8060 flow [2024-06-27 21:29:42,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7805, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8060, PETRI_PLACES=354, PETRI_TRANSITIONS=541} [2024-06-27 21:29:42,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-27 21:29:42,995 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 541 transitions, 8060 flow [2024-06-27 21:29:42,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:42,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:42,996 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 21:29:42,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:29:42,996 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:42,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2035486750, now seen corresponding path program 11 times [2024-06-27 21:29:42,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:42,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107463727] [2024-06-27 21:29:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:42,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:44,196 INFO 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 21:29:44,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:44,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107463727] [2024-06-27 21:29:44,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107463727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:44,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:44,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:29:44,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108440144] [2024-06-27 21:29:44,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:44,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:29:44,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:44,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:29:44,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:29:44,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:44,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 541 transitions, 8060 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:44,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:44,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:44,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:46,170 INFO L124 PetriNetUnfolderBase]: 4572/6962 cut-off events. [2024-06-27 21:29:46,170 INFO L125 PetriNetUnfolderBase]: For 549991/549993 co-relation queries the response was YES. [2024-06-27 21:29:46,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57328 conditions, 6962 events. 4572/6962 cut-off events. For 549991/549993 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 39787 event pairs, 1138 based on Foata normal form. 6/6967 useless extension candidates. Maximal degree in co-relation 57162. Up to 6441 conditions per place. [2024-06-27 21:29:46,274 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 100 changer transitions 0/578 dead transitions. [2024-06-27 21:29:46,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 578 transitions, 9408 flow [2024-06-27 21:29:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:29:46,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 21:29:46,276 INFO L175 Difference]: Start difference. First operand has 354 places, 541 transitions, 8060 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:29:46,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 578 transitions, 9408 flow [2024-06-27 21:29:48,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 578 transitions, 9173 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 21:29:48,241 INFO L231 Difference]: Finished difference. Result has 354 places, 543 transitions, 8113 flow [2024-06-27 21:29:48,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7825, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8113, PETRI_PLACES=354, PETRI_TRANSITIONS=543} [2024-06-27 21:29:48,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-27 21:29:48,242 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 543 transitions, 8113 flow [2024-06-27 21:29:48,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:48,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:48,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:48,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:29:48,242 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:48,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:48,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2035483030, now seen corresponding path program 12 times [2024-06-27 21:29:48,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:48,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027221735] [2024-06-27 21:29:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:48,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:49,442 INFO 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 21:29:49,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:49,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027221735] [2024-06-27 21:29:49,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027221735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:49,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:49,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:29:49,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405810553] [2024-06-27 21:29:49,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:49,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:29:49,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:49,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:29:49,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:29:49,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:49,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 543 transitions, 8113 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:49,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:49,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:49,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:51,369 INFO L124 PetriNetUnfolderBase]: 4589/6983 cut-off events. [2024-06-27 21:29:51,369 INFO L125 PetriNetUnfolderBase]: For 566418/566420 co-relation queries the response was YES. [2024-06-27 21:29:51,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57827 conditions, 6983 events. 4589/6983 cut-off events. For 566418/566420 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 39926 event pairs, 1090 based on Foata normal form. 6/6988 useless extension candidates. Maximal degree in co-relation 57660. Up to 6279 conditions per place. [2024-06-27 21:29:51,463 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 470 selfloop transitions, 109 changer transitions 0/582 dead transitions. [2024-06-27 21:29:51,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 582 transitions, 9519 flow [2024-06-27 21:29:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:29:51,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-27 21:29:51,476 INFO L175 Difference]: Start difference. First operand has 354 places, 543 transitions, 8113 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:29:51,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 582 transitions, 9519 flow [2024-06-27 21:29:53,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 582 transitions, 9281 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 21:29:53,812 INFO L231 Difference]: Finished difference. Result has 357 places, 547 transitions, 8268 flow [2024-06-27 21:29:53,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7875, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8268, PETRI_PLACES=357, PETRI_TRANSITIONS=547} [2024-06-27 21:29:53,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-27 21:29:53,813 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 547 transitions, 8268 flow [2024-06-27 21:29:53,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:53,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:53,814 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 21:29:53,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:29:53,814 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:53,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:53,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2033609080, now seen corresponding path program 13 times [2024-06-27 21:29:53,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:53,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859249478] [2024-06-27 21:29:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:53,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:54,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:54,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859249478] [2024-06-27 21:29:54,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859249478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:54,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:54,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:29:54,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192915777] [2024-06-27 21:29:54,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:54,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:29:54,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:54,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:29:54,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:29:55,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:55,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 547 transitions, 8268 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:55,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:55,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:55,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:56,967 INFO L124 PetriNetUnfolderBase]: 4606/7006 cut-off events. [2024-06-27 21:29:56,967 INFO L125 PetriNetUnfolderBase]: For 592664/592666 co-relation queries the response was YES. [2024-06-27 21:29:57,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58611 conditions, 7006 events. 4606/7006 cut-off events. For 592664/592666 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 39906 event pairs, 961 based on Foata normal form. 6/7011 useless extension candidates. Maximal degree in co-relation 58442. Up to 6418 conditions per place. [2024-06-27 21:29:57,069 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 491 selfloop transitions, 92 changer transitions 0/586 dead transitions. [2024-06-27 21:29:57,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 586 transitions, 9688 flow [2024-06-27 21:29:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:29:57,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 21:29:57,071 INFO L175 Difference]: Start difference. First operand has 357 places, 547 transitions, 8268 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:29:57,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 586 transitions, 9688 flow [2024-06-27 21:29:59,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 586 transitions, 9481 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:59,166 INFO L231 Difference]: Finished difference. Result has 362 places, 551 transitions, 8423 flow [2024-06-27 21:29:59,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8067, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8423, PETRI_PLACES=362, PETRI_TRANSITIONS=551} [2024-06-27 21:29:59,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 21:29:59,167 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 551 transitions, 8423 flow [2024-06-27 21:29:59,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:59,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:59,167 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 21:29:59,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:29:59,167 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:59,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:59,168 INFO L85 PathProgramCache]: Analyzing trace with hash 747415556, now seen corresponding path program 7 times [2024-06-27 21:29:59,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:59,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045990475] [2024-06-27 21:29:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:59,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:00,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:00,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045990475] [2024-06-27 21:30:00,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045990475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:00,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:00,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:00,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625783395] [2024-06-27 21:30:00,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:00,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:00,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:00,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:00,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 551 transitions, 8423 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:00,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:00,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:00,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:02,484 INFO L124 PetriNetUnfolderBase]: 4681/7137 cut-off events. [2024-06-27 21:30:02,484 INFO L125 PetriNetUnfolderBase]: For 602310/602312 co-relation queries the response was YES. [2024-06-27 21:30:02,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59379 conditions, 7137 events. 4681/7137 cut-off events. For 602310/602312 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 41057 event pairs, 1099 based on Foata normal form. 22/7158 useless extension candidates. Maximal degree in co-relation 59207. Up to 6098 conditions per place. [2024-06-27 21:30:02,583 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 477 selfloop transitions, 116 changer transitions 0/596 dead transitions. [2024-06-27 21:30:02,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 596 transitions, 9825 flow [2024-06-27 21:30:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 21:30:02,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-27 21:30:02,584 INFO L175 Difference]: Start difference. First operand has 362 places, 551 transitions, 8423 flow. Second operand 10 states and 167 transitions. [2024-06-27 21:30:02,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 596 transitions, 9825 flow [2024-06-27 21:30:04,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 596 transitions, 9635 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:04,894 INFO L231 Difference]: Finished difference. Result has 367 places, 552 transitions, 8527 flow [2024-06-27 21:30:04,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8233, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8527, PETRI_PLACES=367, PETRI_TRANSITIONS=552} [2024-06-27 21:30:04,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-27 21:30:04,895 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 552 transitions, 8527 flow [2024-06-27 21:30:04,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:04,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:04,896 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 21:30:04,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:30:04,896 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:04,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash 31830958, now seen corresponding path program 14 times [2024-06-27 21:30:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:04,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813798204] [2024-06-27 21:30:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:04,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:06,104 INFO 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 21:30:06,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:06,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813798204] [2024-06-27 21:30:06,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813798204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:06,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:06,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:06,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223746883] [2024-06-27 21:30:06,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:06,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:06,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:06,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:06,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:06,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:06,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 552 transitions, 8527 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:06,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:06,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:06,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:08,207 INFO L124 PetriNetUnfolderBase]: 4698/7154 cut-off events. [2024-06-27 21:30:08,207 INFO L125 PetriNetUnfolderBase]: For 536079/536079 co-relation queries the response was YES. [2024-06-27 21:30:08,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59160 conditions, 7154 events. 4698/7154 cut-off events. For 536079/536079 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41007 event pairs, 840 based on Foata normal form. 4/7157 useless extension candidates. Maximal degree in co-relation 58986. Up to 6411 conditions per place. [2024-06-27 21:30:08,301 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 459 selfloop transitions, 128 changer transitions 0/590 dead transitions. [2024-06-27 21:30:08,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 590 transitions, 9905 flow [2024-06-27 21:30:08,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:30:08,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-27 21:30:08,305 INFO L175 Difference]: Start difference. First operand has 367 places, 552 transitions, 8527 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:30:08,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 590 transitions, 9905 flow [2024-06-27 21:30:10,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 590 transitions, 9683 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 21:30:10,457 INFO L231 Difference]: Finished difference. Result has 368 places, 554 transitions, 8637 flow [2024-06-27 21:30:10,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8305, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8637, PETRI_PLACES=368, PETRI_TRANSITIONS=554} [2024-06-27 21:30:10,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-27 21:30:10,458 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 554 transitions, 8637 flow [2024-06-27 21:30:10,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:10,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:10,458 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 21:30:10,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:30:10,458 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:10,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash 31836910, now seen corresponding path program 8 times [2024-06-27 21:30:10,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:10,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964667927] [2024-06-27 21:30:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:10,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:11,712 INFO 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 21:30:11,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:11,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964667927] [2024-06-27 21:30:11,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964667927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:11,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:11,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:11,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024102775] [2024-06-27 21:30:11,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:11,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:11,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:11,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 554 transitions, 8637 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:11,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:11,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:11,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:14,111 INFO L124 PetriNetUnfolderBase]: 4773/7279 cut-off events. [2024-06-27 21:30:14,111 INFO L125 PetriNetUnfolderBase]: For 583138/583138 co-relation queries the response was YES. [2024-06-27 21:30:14,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60244 conditions, 7279 events. 4773/7279 cut-off events. For 583138/583138 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 41921 event pairs, 826 based on Foata normal form. 20/7298 useless extension candidates. Maximal degree in co-relation 60069. Up to 6250 conditions per place. [2024-06-27 21:30:14,205 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 461 selfloop transitions, 136 changer transitions 0/600 dead transitions. [2024-06-27 21:30:14,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 600 transitions, 10059 flow [2024-06-27 21:30:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:30:14,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:30:14,207 INFO L175 Difference]: Start difference. First operand has 368 places, 554 transitions, 8637 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:30:14,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 600 transitions, 10059 flow [2024-06-27 21:30:15,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 600 transitions, 9755 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 21:30:15,927 INFO L231 Difference]: Finished difference. Result has 371 places, 555 transitions, 8655 flow [2024-06-27 21:30:15,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8333, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8655, PETRI_PLACES=371, PETRI_TRANSITIONS=555} [2024-06-27 21:30:15,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-27 21:30:15,928 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 555 transitions, 8655 flow [2024-06-27 21:30:15,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:15,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:15,928 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 21:30:15,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:30:15,928 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:15,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:15,929 INFO L85 PathProgramCache]: Analyzing trace with hash 26324428, now seen corresponding path program 15 times [2024-06-27 21:30:15,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:15,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815587222] [2024-06-27 21:30:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:15,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:17,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:17,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815587222] [2024-06-27 21:30:17,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815587222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:17,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:17,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:17,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398625411] [2024-06-27 21:30:17,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:17,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:17,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:17,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:17,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 555 transitions, 8655 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:17,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:17,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:17,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:19,990 INFO L124 PetriNetUnfolderBase]: 5118/7790 cut-off events. [2024-06-27 21:30:19,991 INFO L125 PetriNetUnfolderBase]: For 668817/668817 co-relation queries the response was YES. [2024-06-27 21:30:20,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64817 conditions, 7790 events. 5118/7790 cut-off events. For 668817/668817 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 45333 event pairs, 898 based on Foata normal form. 40/7829 useless extension candidates. Maximal degree in co-relation 64641. Up to 6372 conditions per place. [2024-06-27 21:30:20,106 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 454 selfloop transitions, 214 changer transitions 0/671 dead transitions. [2024-06-27 21:30:20,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 671 transitions, 11649 flow [2024-06-27 21:30:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:30:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:30:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-27 21:30:20,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:30:20,107 INFO L175 Difference]: Start difference. First operand has 371 places, 555 transitions, 8655 flow. Second operand 11 states and 198 transitions. [2024-06-27 21:30:20,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 671 transitions, 11649 flow [2024-06-27 21:30:22,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 671 transitions, 11353 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:30:22,032 INFO L231 Difference]: Finished difference. Result has 379 places, 608 transitions, 9997 flow [2024-06-27 21:30:22,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8367, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9997, PETRI_PLACES=379, PETRI_TRANSITIONS=608} [2024-06-27 21:30:22,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-27 21:30:22,033 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 608 transitions, 9997 flow [2024-06-27 21:30:22,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:22,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:22,034 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 21:30:22,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:30:22,034 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:22,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:22,034 INFO L85 PathProgramCache]: Analyzing trace with hash 277647728, now seen corresponding path program 16 times [2024-06-27 21:30:22,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:22,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108531433] [2024-06-27 21:30:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:22,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:23,180 INFO 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 21:30:23,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:23,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108531433] [2024-06-27 21:30:23,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108531433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:23,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:23,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:23,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019707753] [2024-06-27 21:30:23,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:23,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:23,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:23,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:23,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:23,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 608 transitions, 9997 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:23,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:23,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:23,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:25,379 INFO L124 PetriNetUnfolderBase]: 5135/7817 cut-off events. [2024-06-27 21:30:25,380 INFO L125 PetriNetUnfolderBase]: For 634967/634967 co-relation queries the response was YES. [2024-06-27 21:30:25,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67342 conditions, 7817 events. 5135/7817 cut-off events. For 634967/634967 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 45549 event pairs, 880 based on Foata normal form. 4/7820 useless extension candidates. Maximal degree in co-relation 67160. Up to 6956 conditions per place. [2024-06-27 21:30:25,497 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 516 selfloop transitions, 129 changer transitions 0/648 dead transitions. [2024-06-27 21:30:25,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 648 transitions, 11568 flow [2024-06-27 21:30:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:30:25,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-27 21:30:25,498 INFO L175 Difference]: Start difference. First operand has 379 places, 608 transitions, 9997 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:30:25,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 648 transitions, 11568 flow [2024-06-27 21:30:28,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 648 transitions, 11208 flow, removed 140 selfloop flow, removed 3 redundant places. [2024-06-27 21:30:28,119 INFO L231 Difference]: Finished difference. Result has 386 places, 613 transitions, 10078 flow [2024-06-27 21:30:28,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9657, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10078, PETRI_PLACES=386, PETRI_TRANSITIONS=613} [2024-06-27 21:30:28,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-27 21:30:28,120 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 613 transitions, 10078 flow [2024-06-27 21:30:28,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:28,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:28,121 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 21:30:28,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:30:28,121 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:28,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:28,121 INFO L85 PathProgramCache]: Analyzing trace with hash 629794068, now seen corresponding path program 9 times [2024-06-27 21:30:28,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:28,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708008710] [2024-06-27 21:30:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:28,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:29,264 INFO 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 21:30:29,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:29,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708008710] [2024-06-27 21:30:29,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708008710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:29,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:29,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:29,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697251261] [2024-06-27 21:30:29,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:29,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:29,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:29,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:29,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:29,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:29,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 613 transitions, 10078 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:29,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:29,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:29,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:31,790 INFO L124 PetriNetUnfolderBase]: 5304/8100 cut-off events. [2024-06-27 21:30:31,790 INFO L125 PetriNetUnfolderBase]: For 702143/702143 co-relation queries the response was YES. [2024-06-27 21:30:31,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70198 conditions, 8100 events. 5304/8100 cut-off events. For 702143/702143 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 47692 event pairs, 855 based on Foata normal form. 16/8108 useless extension candidates. Maximal degree in co-relation 70013. Up to 6514 conditions per place. [2024-06-27 21:30:31,913 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 470 selfloop transitions, 194 changer transitions 0/667 dead transitions. [2024-06-27 21:30:31,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 667 transitions, 11996 flow [2024-06-27 21:30:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 21:30:31,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:30:31,915 INFO L175 Difference]: Start difference. First operand has 386 places, 613 transitions, 10078 flow. Second operand 10 states and 180 transitions. [2024-06-27 21:30:31,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 667 transitions, 11996 flow [2024-06-27 21:30:34,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 667 transitions, 11744 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:34,585 INFO L231 Difference]: Finished difference. Result has 390 places, 615 transitions, 10310 flow [2024-06-27 21:30:34,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9830, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10310, PETRI_PLACES=390, PETRI_TRANSITIONS=615} [2024-06-27 21:30:34,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-27 21:30:34,586 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 615 transitions, 10310 flow [2024-06-27 21:30:34,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:34,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:34,588 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 21:30:34,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:30:34,588 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:34,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1543128174, now seen corresponding path program 10 times [2024-06-27 21:30:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558875805] [2024-06-27 21:30:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:35,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:35,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558875805] [2024-06-27 21:30:35,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558875805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:35,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:35,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:35,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116537559] [2024-06-27 21:30:35,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:35,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:35,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:35,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:35,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:35,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 615 transitions, 10310 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:35,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:35,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:35,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:38,078 INFO L124 PetriNetUnfolderBase]: 5268/8044 cut-off events. [2024-06-27 21:30:38,078 INFO L125 PetriNetUnfolderBase]: For 668503/668503 co-relation queries the response was YES. [2024-06-27 21:30:38,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69232 conditions, 8044 events. 5268/8044 cut-off events. For 668503/668503 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 47389 event pairs, 857 based on Foata normal form. 20/8056 useless extension candidates. Maximal degree in co-relation 69046. Up to 6642 conditions per place. [2024-06-27 21:30:38,209 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 465 selfloop transitions, 192 changer transitions 0/660 dead transitions. [2024-06-27 21:30:38,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 660 transitions, 11832 flow [2024-06-27 21:30:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:30:38,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-27 21:30:38,210 INFO L175 Difference]: Start difference. First operand has 390 places, 615 transitions, 10310 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:30:38,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 660 transitions, 11832 flow [2024-06-27 21:30:40,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 660 transitions, 11502 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:40,979 INFO L231 Difference]: Finished difference. Result has 394 places, 615 transitions, 10371 flow [2024-06-27 21:30:40,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9980, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10371, PETRI_PLACES=394, PETRI_TRANSITIONS=615} [2024-06-27 21:30:40,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-27 21:30:40,980 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 615 transitions, 10371 flow [2024-06-27 21:30:40,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:40,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:40,980 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 21:30:40,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:30:40,981 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:40,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1287609194, now seen corresponding path program 17 times [2024-06-27 21:30:40,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:40,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363483104] [2024-06-27 21:30:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:40,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:42,208 INFO 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 21:30:42,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:42,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363483104] [2024-06-27 21:30:42,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363483104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:42,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:42,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:42,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965085886] [2024-06-27 21:30:42,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:42,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:42,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:42,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:42,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:42,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:42,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 615 transitions, 10371 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:42,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:42,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:42,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:44,605 INFO L124 PetriNetUnfolderBase]: 5285/8071 cut-off events. [2024-06-27 21:30:44,605 INFO L125 PetriNetUnfolderBase]: For 647216/647216 co-relation queries the response was YES. [2024-06-27 21:30:44,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69726 conditions, 8071 events. 5285/8071 cut-off events. For 647216/647216 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 47549 event pairs, 872 based on Foata normal form. 4/8067 useless extension candidates. Maximal degree in co-relation 69539. Up to 6651 conditions per place. [2024-06-27 21:30:44,735 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 475 selfloop transitions, 178 changer transitions 0/656 dead transitions. [2024-06-27 21:30:44,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 656 transitions, 11935 flow [2024-06-27 21:30:44,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:30:44,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:30:44,736 INFO L175 Difference]: Start difference. First operand has 394 places, 615 transitions, 10371 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:30:44,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 656 transitions, 11935 flow [2024-06-27 21:30:47,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 656 transitions, 11544 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:30:47,535 INFO L231 Difference]: Finished difference. Result has 395 places, 617 transitions, 10426 flow [2024-06-27 21:30:47,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9980, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10426, PETRI_PLACES=395, PETRI_TRANSITIONS=617} [2024-06-27 21:30:47,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-27 21:30:47,536 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 617 transitions, 10426 flow [2024-06-27 21:30:47,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:47,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:47,536 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 21:30:47,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:30:47,537 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:47,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1287615146, now seen corresponding path program 11 times [2024-06-27 21:30:47,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:47,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38776605] [2024-06-27 21:30:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:47,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:48,745 INFO 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 21:30:48,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:48,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38776605] [2024-06-27 21:30:48,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38776605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:48,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:48,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:48,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052370625] [2024-06-27 21:30:48,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:48,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:48,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:48,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:48,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:48,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:48,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 617 transitions, 10426 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:48,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:48,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:48,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:51,102 INFO L124 PetriNetUnfolderBase]: 5360/8196 cut-off events. [2024-06-27 21:30:51,103 INFO L125 PetriNetUnfolderBase]: For 702018/702018 co-relation queries the response was YES. [2024-06-27 21:30:51,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70751 conditions, 8196 events. 5360/8196 cut-off events. For 702018/702018 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 48590 event pairs, 897 based on Foata normal form. 20/8208 useless extension candidates. Maximal degree in co-relation 70563. Up to 7188 conditions per place. [2024-06-27 21:30:51,236 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 513 selfloop transitions, 146 changer transitions 0/662 dead transitions. [2024-06-27 21:30:51,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 662 transitions, 11978 flow [2024-06-27 21:30:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:30:51,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:30:51,241 INFO L175 Difference]: Start difference. First operand has 395 places, 617 transitions, 10426 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:30:51,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 662 transitions, 11978 flow [2024-06-27 21:30:53,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 662 transitions, 11563 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 21:30:53,986 INFO L231 Difference]: Finished difference. Result has 397 places, 618 transitions, 10344 flow [2024-06-27 21:30:53,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10011, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10344, PETRI_PLACES=397, PETRI_TRANSITIONS=618} [2024-06-27 21:30:53,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-27 21:30:53,987 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 618 transitions, 10344 flow [2024-06-27 21:30:53,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:53,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:53,988 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 21:30:53,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:30:53,988 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:53,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:53,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1857094314, now seen corresponding path program 12 times [2024-06-27 21:30:53,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:53,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116540593] [2024-06-27 21:30:53,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:53,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:55,025 INFO 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 21:30:55,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:55,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116540593] [2024-06-27 21:30:55,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116540593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:55,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:55,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:30:55,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128114526] [2024-06-27 21:30:55,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:55,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:30:55,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:55,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:30:55,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:30:55,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:55,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 618 transitions, 10344 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:55,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:55,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:55,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:57,519 INFO L124 PetriNetUnfolderBase]: 5368/8216 cut-off events. [2024-06-27 21:30:57,519 INFO L125 PetriNetUnfolderBase]: For 675577/675577 co-relation queries the response was YES. [2024-06-27 21:30:57,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70035 conditions, 8216 events. 5368/8216 cut-off events. For 675577/675577 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 48485 event pairs, 764 based on Foata normal form. 16/8224 useless extension candidates. Maximal degree in co-relation 69847. Up to 4941 conditions per place. [2024-06-27 21:30:57,663 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 457 selfloop transitions, 212 changer transitions 0/672 dead transitions. [2024-06-27 21:30:57,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 672 transitions, 12246 flow [2024-06-27 21:30:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 21:30:57,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-27 21:30:57,665 INFO L175 Difference]: Start difference. First operand has 397 places, 618 transitions, 10344 flow. Second operand 10 states and 179 transitions. [2024-06-27 21:30:57,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 672 transitions, 12246 flow [2024-06-27 21:31:00,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 672 transitions, 11828 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 21:31:00,864 INFO L231 Difference]: Finished difference. Result has 397 places, 619 transitions, 10404 flow [2024-06-27 21:31:00,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9926, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10404, PETRI_PLACES=397, PETRI_TRANSITIONS=619} [2024-06-27 21:31:00,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-27 21:31:00,865 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 619 transitions, 10404 flow [2024-06-27 21:31:00,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:00,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:00,865 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 21:31:00,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:31:00,865 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:00,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash -590184454, now seen corresponding path program 18 times [2024-06-27 21:31:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:00,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517267882] [2024-06-27 21:31:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:02,062 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 21:31:02,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:02,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517267882] [2024-06-27 21:31:02,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517267882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:02,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:02,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:31:02,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960244556] [2024-06-27 21:31:02,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:02,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:31:02,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:02,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:31:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:31:02,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:02,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 619 transitions, 10404 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:02,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:02,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:02,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:04,160 INFO L124 PetriNetUnfolderBase]: 5385/8243 cut-off events. [2024-06-27 21:31:04,161 INFO L125 PetriNetUnfolderBase]: For 667513/667513 co-relation queries the response was YES. [2024-06-27 21:31:04,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70828 conditions, 8243 events. 5385/8243 cut-off events. For 667513/667513 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 49067 event pairs, 919 based on Foata normal form. 4/8239 useless extension candidates. Maximal degree in co-relation 70639. Up to 6943 conditions per place. [2024-06-27 21:31:04,294 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 490 selfloop transitions, 164 changer transitions 0/657 dead transitions. [2024-06-27 21:31:04,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 657 transitions, 11940 flow [2024-06-27 21:31:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:31:04,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 21:31:04,296 INFO L175 Difference]: Start difference. First operand has 397 places, 619 transitions, 10404 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:31:04,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 657 transitions, 11940 flow [2024-06-27 21:31:06,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 657 transitions, 11476 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 21:31:06,886 INFO L231 Difference]: Finished difference. Result has 398 places, 621 transitions, 10361 flow [2024-06-27 21:31:06,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9940, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10361, PETRI_PLACES=398, PETRI_TRANSITIONS=621} [2024-06-27 21:31:06,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-27 21:31:06,887 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 621 transitions, 10361 flow [2024-06-27 21:31:06,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:06,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:06,888 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 21:31:06,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:31:06,888 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:06,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash -590178502, now seen corresponding path program 13 times [2024-06-27 21:31:06,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:06,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770108818] [2024-06-27 21:31:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:06,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:08,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:08,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770108818] [2024-06-27 21:31:08,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770108818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:08,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:08,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:31:08,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532731922] [2024-06-27 21:31:08,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:08,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:31:08,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:08,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:31:08,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:31:08,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:08,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 621 transitions, 10361 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:08,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:08,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:08,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:10,358 INFO L124 PetriNetUnfolderBase]: 5460/8368 cut-off events. [2024-06-27 21:31:10,358 INFO L125 PetriNetUnfolderBase]: For 719106/719106 co-relation queries the response was YES. [2024-06-27 21:31:10,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71105 conditions, 8368 events. 5460/8368 cut-off events. For 719106/719106 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 50009 event pairs, 929 based on Foata normal form. 20/8380 useless extension candidates. Maximal degree in co-relation 70915. Up to 6948 conditions per place. [2024-06-27 21:31:10,495 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 499 selfloop transitions, 165 changer transitions 0/667 dead transitions. [2024-06-27 21:31:10,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 667 transitions, 11929 flow [2024-06-27 21:31:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:31:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:31:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 21:31:10,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-27 21:31:10,497 INFO L175 Difference]: Start difference. First operand has 398 places, 621 transitions, 10361 flow. Second operand 10 states and 176 transitions. [2024-06-27 21:31:10,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 667 transitions, 11929 flow [2024-06-27 21:31:13,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 667 transitions, 11526 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 21:31:13,424 INFO L231 Difference]: Finished difference. Result has 401 places, 622 transitions, 10334 flow [2024-06-27 21:31:13,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9958, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10334, PETRI_PLACES=401, PETRI_TRANSITIONS=622} [2024-06-27 21:31:13,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-27 21:31:13,425 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 622 transitions, 10334 flow [2024-06-27 21:31:13,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:13,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:13,425 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 21:31:13,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:31:13,426 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:13,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash -595690984, now seen corresponding path program 19 times [2024-06-27 21:31:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912353928] [2024-06-27 21:31:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:14,540 INFO 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 21:31:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912353928] [2024-06-27 21:31:14,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912353928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:14,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:14,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:31:14,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408099762] [2024-06-27 21:31:14,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:14,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:31:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:14,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:31:14,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:31:14,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:14,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 622 transitions, 10334 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:14,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:14,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:14,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:16,908 INFO L124 PetriNetUnfolderBase]: 5477/8395 cut-off events. [2024-06-27 21:31:16,909 INFO L125 PetriNetUnfolderBase]: For 700252/700252 co-relation queries the response was YES. [2024-06-27 21:31:17,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71502 conditions, 8395 events. 5477/8395 cut-off events. For 700252/700252 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 50262 event pairs, 939 based on Foata normal form. 4/8391 useless extension candidates. Maximal degree in co-relation 71311. Up to 7095 conditions per place. [2024-06-27 21:31:17,050 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 489 selfloop transitions, 166 changer transitions 0/658 dead transitions. [2024-06-27 21:31:17,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 658 transitions, 11866 flow [2024-06-27 21:31:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:31:17,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 21:31:17,051 INFO L175 Difference]: Start difference. First operand has 401 places, 622 transitions, 10334 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:31:17,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 658 transitions, 11866 flow [2024-06-27 21:31:20,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 658 transitions, 11516 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 21:31:20,219 INFO L231 Difference]: Finished difference. Result has 402 places, 624 transitions, 10413 flow [2024-06-27 21:31:20,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9984, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10413, PETRI_PLACES=402, PETRI_TRANSITIONS=624} [2024-06-27 21:31:20,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-27 21:31:20,221 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 624 transitions, 10413 flow [2024-06-27 21:31:20,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:20,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:20,221 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 21:31:20,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:31:20,221 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:20,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash -595540882, now seen corresponding path program 14 times [2024-06-27 21:31:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:20,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442445865] [2024-06-27 21:31:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:20,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:21,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:21,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442445865] [2024-06-27 21:31:21,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442445865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:21,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:21,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:31:21,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873180411] [2024-06-27 21:31:21,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:21,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:31:21,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:31:21,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:31:21,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:21,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 624 transitions, 10413 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:21,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:21,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:21,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:24,013 INFO L124 PetriNetUnfolderBase]: 5482/8408 cut-off events. [2024-06-27 21:31:24,013 INFO L125 PetriNetUnfolderBase]: For 737466/737466 co-relation queries the response was YES. [2024-06-27 21:31:24,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70399 conditions, 8408 events. 5482/8408 cut-off events. For 737466/737466 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 50327 event pairs, 928 based on Foata normal form. 32/8432 useless extension candidates. Maximal degree in co-relation 70207. Up to 6921 conditions per place. [2024-06-27 21:31:24,153 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 496 selfloop transitions, 171 changer transitions 0/670 dead transitions. [2024-06-27 21:31:24,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 670 transitions, 12011 flow [2024-06-27 21:31:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:31:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:31:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-27 21:31:24,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124168514412417 [2024-06-27 21:31:24,155 INFO L175 Difference]: Start difference. First operand has 402 places, 624 transitions, 10413 flow. Second operand 11 states and 186 transitions. [2024-06-27 21:31:24,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 670 transitions, 12011 flow [2024-06-27 21:31:27,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 670 transitions, 11586 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 21:31:27,554 INFO L231 Difference]: Finished difference. Result has 406 places, 625 transitions, 10394 flow [2024-06-27 21:31:27,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9988, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10394, PETRI_PLACES=406, PETRI_TRANSITIONS=625} [2024-06-27 21:31:27,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-27 21:31:27,555 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 625 transitions, 10394 flow [2024-06-27 21:31:27,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:27,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:27,555 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 21:31:27,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:31:27,555 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:27,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:27,556 INFO L85 PathProgramCache]: Analyzing trace with hash -595694704, now seen corresponding path program 20 times [2024-06-27 21:31:27,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:27,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358603121] [2024-06-27 21:31:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:28,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:28,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358603121] [2024-06-27 21:31:28,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358603121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:28,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:28,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:31:28,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947487071] [2024-06-27 21:31:28,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:28,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:31:28,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:28,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:31:28,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:31:28,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:28,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 625 transitions, 10394 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:28,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:28,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:28,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:31,051 INFO L124 PetriNetUnfolderBase]: 5474/8398 cut-off events. [2024-06-27 21:31:31,051 INFO L125 PetriNetUnfolderBase]: For 673287/673287 co-relation queries the response was YES. [2024-06-27 21:31:31,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69867 conditions, 8398 events. 5474/8398 cut-off events. For 673287/673287 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 50330 event pairs, 927 based on Foata normal form. 4/8394 useless extension candidates. Maximal degree in co-relation 69674. Up to 6901 conditions per place. [2024-06-27 21:31:31,193 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 490 selfloop transitions, 174 changer transitions 0/667 dead transitions. [2024-06-27 21:31:31,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 667 transitions, 12046 flow [2024-06-27 21:31:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:31:31,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:31:31,195 INFO L175 Difference]: Start difference. First operand has 406 places, 625 transitions, 10394 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:31:31,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 667 transitions, 12046 flow [2024-06-27 21:31:34,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 667 transitions, 11691 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 21:31:34,124 INFO L231 Difference]: Finished difference. Result has 408 places, 629 transitions, 10565 flow [2024-06-27 21:31:34,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10039, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10565, PETRI_PLACES=408, PETRI_TRANSITIONS=629} [2024-06-27 21:31:34,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-27 21:31:34,125 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 629 transitions, 10565 flow [2024-06-27 21:31:34,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:34,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:34,125 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 21:31:34,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:31:34,126 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:34,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:34,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1142859099, now seen corresponding path program 1 times [2024-06-27 21:31:34,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:34,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618449717] [2024-06-27 21:31:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:34,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:34,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:34,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618449717] [2024-06-27 21:31:34,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618449717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:34,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:34,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:34,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711485905] [2024-06-27 21:31:34,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:34,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:34,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:34,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:34,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 629 transitions, 10565 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:34,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:34,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:34,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:37,007 INFO L124 PetriNetUnfolderBase]: 5505/8444 cut-off events. [2024-06-27 21:31:37,007 INFO L125 PetriNetUnfolderBase]: For 693687/693691 co-relation queries the response was YES. [2024-06-27 21:31:37,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70471 conditions, 8444 events. 5505/8444 cut-off events. For 693687/693691 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 50889 event pairs, 1455 based on Foata normal form. 7/8446 useless extension candidates. Maximal degree in co-relation 70276. Up to 7797 conditions per place. [2024-06-27 21:31:37,153 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 546 selfloop transitions, 124 changer transitions 0/673 dead transitions. [2024-06-27 21:31:37,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 673 transitions, 12681 flow [2024-06-27 21:31:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:31:37,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:31:37,154 INFO L175 Difference]: Start difference. First operand has 408 places, 629 transitions, 10565 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:31:37,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 673 transitions, 12681 flow [2024-06-27 21:31:39,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 673 transitions, 12361 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 21:31:39,670 INFO L231 Difference]: Finished difference. Result has 412 places, 645 transitions, 10909 flow [2024-06-27 21:31:39,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10245, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10909, PETRI_PLACES=412, PETRI_TRANSITIONS=645} [2024-06-27 21:31:39,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-27 21:31:39,671 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 645 transitions, 10909 flow [2024-06-27 21:31:39,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:39,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:39,671 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 21:31:39,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:31:39,672 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:39,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash -327378473, now seen corresponding path program 2 times [2024-06-27 21:31:39,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:39,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269572985] [2024-06-27 21:31:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:39,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:40,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:40,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269572985] [2024-06-27 21:31:40,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269572985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:40,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:40,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:40,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968361091] [2024-06-27 21:31:40,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:40,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:40,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:40,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:40,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 645 transitions, 10909 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:40,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:40,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:40,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:42,591 INFO L124 PetriNetUnfolderBase]: 5520/8474 cut-off events. [2024-06-27 21:31:42,592 INFO L125 PetriNetUnfolderBase]: For 710306/710306 co-relation queries the response was YES. [2024-06-27 21:31:42,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71563 conditions, 8474 events. 5520/8474 cut-off events. For 710306/710306 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 51184 event pairs, 2177 based on Foata normal form. 3/8476 useless extension candidates. Maximal degree in co-relation 71365. Up to 8332 conditions per place. [2024-06-27 21:31:42,740 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 629 selfloop transitions, 41 changer transitions 0/673 dead transitions. [2024-06-27 21:31:42,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 673 transitions, 12505 flow [2024-06-27 21:31:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:31:42,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:31:42,741 INFO L175 Difference]: Start difference. First operand has 412 places, 645 transitions, 10909 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:31:42,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 673 transitions, 12505 flow [2024-06-27 21:31:45,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 673 transitions, 12278 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-27 21:31:45,739 INFO L231 Difference]: Finished difference. Result has 417 places, 651 transitions, 10906 flow [2024-06-27 21:31:45,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10696, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10906, PETRI_PLACES=417, PETRI_TRANSITIONS=651} [2024-06-27 21:31:45,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-27 21:31:45,740 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 651 transitions, 10906 flow [2024-06-27 21:31:45,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:45,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:45,740 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 21:31:45,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:31:45,741 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:45,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash -323659403, now seen corresponding path program 3 times [2024-06-27 21:31:45,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:45,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416053234] [2024-06-27 21:31:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:45,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:46,373 INFO 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 21:31:46,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:46,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416053234] [2024-06-27 21:31:46,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416053234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:46,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:46,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323595327] [2024-06-27 21:31:46,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:46,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:46,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:46,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:46,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 651 transitions, 10906 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:46,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:46,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:46,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:48,847 INFO L124 PetriNetUnfolderBase]: 5535/8495 cut-off events. [2024-06-27 21:31:48,847 INFO L125 PetriNetUnfolderBase]: For 724950/724950 co-relation queries the response was YES. [2024-06-27 21:31:48,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72219 conditions, 8495 events. 5535/8495 cut-off events. For 724950/724950 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51323 event pairs, 2179 based on Foata normal form. 3/8497 useless extension candidates. Maximal degree in co-relation 72019. Up to 8384 conditions per place. [2024-06-27 21:31:49,003 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 642 selfloop transitions, 31 changer transitions 0/676 dead transitions. [2024-06-27 21:31:49,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 676 transitions, 12467 flow [2024-06-27 21:31:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:31:49,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:31:49,005 INFO L175 Difference]: Start difference. First operand has 417 places, 651 transitions, 10906 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:31:49,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 676 transitions, 12467 flow [2024-06-27 21:31:51,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 676 transitions, 12309 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:51,562 INFO L231 Difference]: Finished difference. Result has 419 places, 657 transitions, 10950 flow [2024-06-27 21:31:51,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10748, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10950, PETRI_PLACES=419, PETRI_TRANSITIONS=657} [2024-06-27 21:31:51,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-27 21:31:51,563 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 657 transitions, 10950 flow [2024-06-27 21:31:51,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:51,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:51,563 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 21:31:51,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:31:51,564 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:51,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash -963633193, now seen corresponding path program 4 times [2024-06-27 21:31:51,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:51,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362250656] [2024-06-27 21:31:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:51,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:52,251 INFO 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 21:31:52,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:52,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362250656] [2024-06-27 21:31:52,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362250656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:52,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:52,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:52,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315930486] [2024-06-27 21:31:52,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:52,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:52,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:52,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:52,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:52,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:52,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 657 transitions, 10950 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:52,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:52,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:52,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:54,623 INFO L124 PetriNetUnfolderBase]: 5542/8505 cut-off events. [2024-06-27 21:31:54,623 INFO L125 PetriNetUnfolderBase]: For 736593/736593 co-relation queries the response was YES. [2024-06-27 21:31:54,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72743 conditions, 8505 events. 5542/8505 cut-off events. For 736593/736593 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51339 event pairs, 2181 based on Foata normal form. 3/8507 useless extension candidates. Maximal degree in co-relation 72542. Up to 8385 conditions per place. [2024-06-27 21:31:54,773 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 650 selfloop transitions, 32 changer transitions 0/685 dead transitions. [2024-06-27 21:31:54,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 685 transitions, 12543 flow [2024-06-27 21:31:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:31:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:31:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:31:54,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:31:54,775 INFO L175 Difference]: Start difference. First operand has 419 places, 657 transitions, 10950 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:31:54,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 685 transitions, 12543 flow [2024-06-27 21:31:57,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 685 transitions, 12393 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:57,821 INFO L231 Difference]: Finished difference. Result has 420 places, 662 transitions, 10996 flow [2024-06-27 21:31:57,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10800, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10996, PETRI_PLACES=420, PETRI_TRANSITIONS=662} [2024-06-27 21:31:57,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-27 21:31:57,821 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 662 transitions, 10996 flow [2024-06-27 21:31:57,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:57,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:57,822 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 21:31:57,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:31:57,822 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:57,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:57,822 INFO L85 PathProgramCache]: Analyzing trace with hash -956275808, now seen corresponding path program 1 times [2024-06-27 21:31:57,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:57,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727096135] [2024-06-27 21:31:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:57,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:58,521 INFO 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 21:31:58,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:58,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727096135] [2024-06-27 21:31:58,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727096135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:58,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:58,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:58,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627811161] [2024-06-27 21:31:58,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:58,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:58,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:58,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:58,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:58,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:58,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 662 transitions, 10996 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:58,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:58,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:58,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:00,871 INFO L124 PetriNetUnfolderBase]: 5536/8497 cut-off events. [2024-06-27 21:32:00,871 INFO L125 PetriNetUnfolderBase]: For 742177/742177 co-relation queries the response was YES. [2024-06-27 21:32:00,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73054 conditions, 8497 events. 5536/8497 cut-off events. For 742177/742177 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 51224 event pairs, 2174 based on Foata normal form. 2/8498 useless extension candidates. Maximal degree in co-relation 72852. Up to 8375 conditions per place. [2024-06-27 21:32:01,021 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 650 selfloop transitions, 31 changer transitions 0/684 dead transitions. [2024-06-27 21:32:01,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 684 transitions, 12549 flow [2024-06-27 21:32:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 21:32:01,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 21:32:01,022 INFO L175 Difference]: Start difference. First operand has 420 places, 662 transitions, 10996 flow. Second operand 6 states and 104 transitions. [2024-06-27 21:32:01,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 684 transitions, 12549 flow [2024-06-27 21:32:04,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 684 transitions, 12401 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:04,219 INFO L231 Difference]: Finished difference. Result has 421 places, 665 transitions, 11018 flow [2024-06-27 21:32:04,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10848, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11018, PETRI_PLACES=421, PETRI_TRANSITIONS=665} [2024-06-27 21:32:04,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-27 21:32:04,220 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 665 transitions, 11018 flow [2024-06-27 21:32:04,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:04,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:04,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:04,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:32:04,221 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:04,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1962965010, now seen corresponding path program 1 times [2024-06-27 21:32:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:04,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985814336] [2024-06-27 21:32:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:05,494 INFO 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 21:32:05,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:05,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985814336] [2024-06-27 21:32:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985814336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:05,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:05,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 21:32:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423598713] [2024-06-27 21:32:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:05,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 21:32:05,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:05,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 21:32:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 21:32:05,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:32:05,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 665 transitions, 11018 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:32:05,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:05,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:32:05,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:08,077 INFO L124 PetriNetUnfolderBase]: 5577/8556 cut-off events. [2024-06-27 21:32:08,078 INFO L125 PetriNetUnfolderBase]: For 788144/788146 co-relation queries the response was YES. [2024-06-27 21:32:08,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74005 conditions, 8556 events. 5577/8556 cut-off events. For 788144/788146 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 51597 event pairs, 1299 based on Foata normal form. 14/8569 useless extension candidates. Maximal degree in co-relation 73802. Up to 8129 conditions per place. [2024-06-27 21:32:08,227 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 640 selfloop transitions, 72 changer transitions 0/715 dead transitions. [2024-06-27 21:32:08,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 715 transitions, 12691 flow [2024-06-27 21:32:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:32:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:32:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-27 21:32:08,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946784922394678 [2024-06-27 21:32:08,228 INFO L175 Difference]: Start difference. First operand has 421 places, 665 transitions, 11018 flow. Second operand 11 states and 178 transitions. [2024-06-27 21:32:08,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 715 transitions, 12691 flow [2024-06-27 21:32:11,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 715 transitions, 12565 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:11,278 INFO L231 Difference]: Finished difference. Result has 427 places, 666 transitions, 11102 flow [2024-06-27 21:32:11,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10892, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11102, PETRI_PLACES=427, PETRI_TRANSITIONS=666} [2024-06-27 21:32:11,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-27 21:32:11,278 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 666 transitions, 11102 flow [2024-06-27 21:32:11,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:32:11,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:11,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:11,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:32:11,279 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:11,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash 492605962, now seen corresponding path program 2 times [2024-06-27 21:32:11,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:11,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472819806] [2024-06-27 21:32:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:11,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:12,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:12,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472819806] [2024-06-27 21:32:12,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472819806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:12,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:12,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:32:12,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956759424] [2024-06-27 21:32:12,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:12,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:32:12,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:12,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:32:12,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:32:12,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:32:12,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 666 transitions, 11102 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:12,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:12,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:32:12,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:15,288 INFO L124 PetriNetUnfolderBase]: 5618/8637 cut-off events. [2024-06-27 21:32:15,289 INFO L125 PetriNetUnfolderBase]: For 790166/790168 co-relation queries the response was YES. [2024-06-27 21:32:15,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74741 conditions, 8637 events. 5618/8637 cut-off events. For 790166/790168 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 52325 event pairs, 1348 based on Foata normal form. 14/8650 useless extension candidates. Maximal degree in co-relation 74538. Up to 8212 conditions per place. [2024-06-27 21:32:15,448 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 634 selfloop transitions, 78 changer transitions 0/715 dead transitions. [2024-06-27 21:32:15,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 715 transitions, 12776 flow [2024-06-27 21:32:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:32:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:32:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 21:32:15,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968957871396896 [2024-06-27 21:32:15,450 INFO L175 Difference]: Start difference. First operand has 427 places, 666 transitions, 11102 flow. Second operand 11 states and 179 transitions. [2024-06-27 21:32:15,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 715 transitions, 12776 flow [2024-06-27 21:32:18,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 715 transitions, 12595 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 21:32:18,904 INFO L231 Difference]: Finished difference. Result has 430 places, 667 transitions, 11144 flow [2024-06-27 21:32:18,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10921, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11144, PETRI_PLACES=430, PETRI_TRANSITIONS=667} [2024-06-27 21:32:18,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-27 21:32:18,905 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 667 transitions, 11144 flow [2024-06-27 21:32:18,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:18,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:18,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:18,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:32:18,906 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:18,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:18,906 INFO L85 PathProgramCache]: Analyzing trace with hash 523771192, now seen corresponding path program 3 times [2024-06-27 21:32:18,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:18,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791721925] [2024-06-27 21:32:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:18,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:20,138 INFO 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 21:32:20,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:20,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791721925] [2024-06-27 21:32:20,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791721925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:20,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:20,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 21:32:20,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692057625] [2024-06-27 21:32:20,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:20,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 21:32:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:20,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 21:32:20,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 21:32:20,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:32:20,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 667 transitions, 11144 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:32:20,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:20,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:32:20,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:22,720 INFO L124 PetriNetUnfolderBase]: 5659/8704 cut-off events. [2024-06-27 21:32:22,720 INFO L125 PetriNetUnfolderBase]: For 816792/816794 co-relation queries the response was YES. [2024-06-27 21:32:22,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75336 conditions, 8704 events. 5659/8704 cut-off events. For 816792/816794 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 52838 event pairs, 1341 based on Foata normal form. 14/8717 useless extension candidates. Maximal degree in co-relation 75132. Up to 8200 conditions per place. [2024-06-27 21:32:22,867 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 630 selfloop transitions, 83 changer transitions 0/716 dead transitions. [2024-06-27 21:32:22,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 716 transitions, 12820 flow [2024-06-27 21:32:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:32:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:32:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-27 21:32:22,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991130820399113 [2024-06-27 21:32:22,869 INFO L175 Difference]: Start difference. First operand has 430 places, 667 transitions, 11144 flow. Second operand 11 states and 180 transitions. [2024-06-27 21:32:22,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 716 transitions, 12820 flow [2024-06-27 21:32:26,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 716 transitions, 12615 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 21:32:26,665 INFO L231 Difference]: Finished difference. Result has 432 places, 668 transitions, 11174 flow [2024-06-27 21:32:26,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10939, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11174, PETRI_PLACES=432, PETRI_TRANSITIONS=668} [2024-06-27 21:32:26,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-27 21:32:26,666 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 668 transitions, 11174 flow [2024-06-27 21:32:26,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:32:26,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:26,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:26,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:32:26,667 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:26,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash -746259114, now seen corresponding path program 4 times [2024-06-27 21:32:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:26,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604227935] [2024-06-27 21:32:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:26,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:28,050 INFO 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 21:32:28,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:28,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604227935] [2024-06-27 21:32:28,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604227935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:28,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:28,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 21:32:28,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806541247] [2024-06-27 21:32:28,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:28,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 21:32:28,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:28,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 21:32:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 21:32:28,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:32:28,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 668 transitions, 11174 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:32:28,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:28,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:32:28,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:30,784 INFO L124 PetriNetUnfolderBase]: 5727/8816 cut-off events. [2024-06-27 21:32:30,784 INFO L125 PetriNetUnfolderBase]: For 836587/836589 co-relation queries the response was YES. [2024-06-27 21:32:30,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76118 conditions, 8816 events. 5727/8816 cut-off events. For 836587/836589 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 53423 event pairs, 1198 based on Foata normal form. 14/8829 useless extension candidates. Maximal degree in co-relation 75913. Up to 8276 conditions per place. [2024-06-27 21:32:30,922 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 634 selfloop transitions, 80 changer transitions 0/717 dead transitions. [2024-06-27 21:32:30,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 717 transitions, 12854 flow [2024-06-27 21:32:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:32:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:32:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-27 21:32:30,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:32:30,923 INFO L175 Difference]: Start difference. First operand has 432 places, 668 transitions, 11174 flow. Second operand 11 states and 176 transitions. [2024-06-27 21:32:30,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 717 transitions, 12854 flow [2024-06-27 21:32:34,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 717 transitions, 12637 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-27 21:32:34,578 INFO L231 Difference]: Finished difference. Result has 434 places, 670 transitions, 11200 flow [2024-06-27 21:32:34,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10957, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11200, PETRI_PLACES=434, PETRI_TRANSITIONS=670} [2024-06-27 21:32:34,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-27 21:32:34,579 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 670 transitions, 11200 flow [2024-06-27 21:32:34,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:32:34,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:34,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:34,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:32:34,580 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:34,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1008375620, now seen corresponding path program 1 times [2024-06-27 21:32:34,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:34,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137271703] [2024-06-27 21:32:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:35,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:35,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137271703] [2024-06-27 21:32:35,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137271703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:35,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:35,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266816693] [2024-06-27 21:32:35,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:35,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:35,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:35,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:32:35,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 670 transitions, 11200 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:32:35,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:35,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:32:35,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:39,252 INFO L124 PetriNetUnfolderBase]: 5747/8848 cut-off events. [2024-06-27 21:32:39,252 INFO L125 PetriNetUnfolderBase]: For 828783/828785 co-relation queries the response was YES. [2024-06-27 21:32:39,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76270 conditions, 8848 events. 5747/8848 cut-off events. For 828783/828785 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 53904 event pairs, 1526 based on Foata normal form. 6/8853 useless extension candidates. Maximal degree in co-relation 76064. Up to 8387 conditions per place. [2024-06-27 21:32:39,452 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 604 selfloop transitions, 105 changer transitions 0/712 dead transitions. [2024-06-27 21:32:39,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 712 transitions, 13022 flow [2024-06-27 21:32:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:32:39,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 21:32:39,454 INFO L175 Difference]: Start difference. First operand has 434 places, 670 transitions, 11200 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:32:39,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 712 transitions, 13022 flow [2024-06-27 21:32:43,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 712 transitions, 12830 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 21:32:43,425 INFO L231 Difference]: Finished difference. Result has 435 places, 676 transitions, 11345 flow [2024-06-27 21:32:43,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11008, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11345, PETRI_PLACES=435, PETRI_TRANSITIONS=676} [2024-06-27 21:32:43,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-27 21:32:43,426 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 676 transitions, 11345 flow [2024-06-27 21:32:43,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:32:43,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:43,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:43,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:32:43,427 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:43,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:43,427 INFO L85 PathProgramCache]: Analyzing trace with hash -379335180, now seen corresponding path program 5 times [2024-06-27 21:32:43,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:43,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633494686] [2024-06-27 21:32:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:43,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:44,582 INFO 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 21:32:44,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:44,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633494686] [2024-06-27 21:32:44,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633494686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:44,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:44,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:32:44,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542496038] [2024-06-27 21:32:44,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:44,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:32:44,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:44,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:32:44,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:32:44,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:32:44,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 676 transitions, 11345 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:44,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:44,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:32:44,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:47,380 INFO L124 PetriNetUnfolderBase]: 5842/8999 cut-off events. [2024-06-27 21:32:47,380 INFO L125 PetriNetUnfolderBase]: For 868634/868636 co-relation queries the response was YES. [2024-06-27 21:32:47,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77599 conditions, 8999 events. 5842/8999 cut-off events. For 868634/868636 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 55018 event pairs, 1165 based on Foata normal form. 14/9012 useless extension candidates. Maximal degree in co-relation 77392. Up to 8510 conditions per place. [2024-06-27 21:32:47,534 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 647 selfloop transitions, 75 changer transitions 0/725 dead transitions. [2024-06-27 21:32:47,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 725 transitions, 13053 flow [2024-06-27 21:32:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:32:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:32:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-27 21:32:47,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991130820399113 [2024-06-27 21:32:47,536 INFO L175 Difference]: Start difference. First operand has 435 places, 676 transitions, 11345 flow. Second operand 11 states and 180 transitions. [2024-06-27 21:32:47,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 725 transitions, 13053 flow [2024-06-27 21:32:50,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 725 transitions, 12858 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:50,773 INFO L231 Difference]: Finished difference. Result has 440 places, 679 transitions, 11400 flow [2024-06-27 21:32:50,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11150, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11400, PETRI_PLACES=440, PETRI_TRANSITIONS=679} [2024-06-27 21:32:50,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-27 21:32:50,773 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 679 transitions, 11400 flow [2024-06-27 21:32:50,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:50,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:50,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:50,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:32:50,774 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:50,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash 511016854, now seen corresponding path program 6 times [2024-06-27 21:32:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:50,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050674364] [2024-06-27 21:32:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:50,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:52,068 INFO 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 21:32:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050674364] [2024-06-27 21:32:52,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050674364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:52,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:52,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:32:52,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107870741] [2024-06-27 21:32:52,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:52,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:32:52,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:32:52,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:32:52,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:32:52,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 679 transitions, 11400 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:52,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:52,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:32:52,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:54,894 INFO L124 PetriNetUnfolderBase]: 5910/9117 cut-off events. [2024-06-27 21:32:54,894 INFO L125 PetriNetUnfolderBase]: For 892817/892819 co-relation queries the response was YES. [2024-06-27 21:32:55,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78773 conditions, 9117 events. 5910/9117 cut-off events. For 892817/892819 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56013 event pairs, 1228 based on Foata normal form. 14/9130 useless extension candidates. Maximal degree in co-relation 78565. Up to 8566 conditions per place. [2024-06-27 21:32:55,055 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 636 selfloop transitions, 87 changer transitions 0/726 dead transitions. [2024-06-27 21:32:55,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 726 transitions, 13096 flow [2024-06-27 21:32:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:32:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:32:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 21:32:55,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035476718403548 [2024-06-27 21:32:55,057 INFO L175 Difference]: Start difference. First operand has 440 places, 679 transitions, 11400 flow. Second operand 11 states and 182 transitions. [2024-06-27 21:32:55,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 726 transitions, 13096 flow [2024-06-27 21:32:58,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 726 transitions, 12923 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 21:32:58,865 INFO L231 Difference]: Finished difference. Result has 444 places, 681 transitions, 11487 flow [2024-06-27 21:32:58,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11227, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11487, PETRI_PLACES=444, PETRI_TRANSITIONS=681} [2024-06-27 21:32:58,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-27 21:32:58,866 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 681 transitions, 11487 flow [2024-06-27 21:32:58,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:58,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:58,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:58,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:32:58,867 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:58,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash 511132174, now seen corresponding path program 7 times [2024-06-27 21:32:58,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:58,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589755940] [2024-06-27 21:32:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:58,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:00,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:00,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589755940] [2024-06-27 21:33:00,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589755940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:00,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:00,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:33:00,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671904118] [2024-06-27 21:33:00,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:00,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:33:00,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:33:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:33:00,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:33:00,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 681 transitions, 11487 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:00,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:00,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:33:00,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:02,897 INFO L124 PetriNetUnfolderBase]: 5978/9235 cut-off events. [2024-06-27 21:33:02,897 INFO L125 PetriNetUnfolderBase]: For 912367/912369 co-relation queries the response was YES. [2024-06-27 21:33:03,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79655 conditions, 9235 events. 5978/9235 cut-off events. For 912367/912369 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 56961 event pairs, 1290 based on Foata normal form. 14/9248 useless extension candidates. Maximal degree in co-relation 79446. Up to 8773 conditions per place. [2024-06-27 21:33:03,064 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 641 selfloop transitions, 84 changer transitions 0/728 dead transitions. [2024-06-27 21:33:03,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 728 transitions, 13191 flow [2024-06-27 21:33:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:33:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:33:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-27 21:33:03,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.401330376940133 [2024-06-27 21:33:03,066 INFO L175 Difference]: Start difference. First operand has 444 places, 681 transitions, 11487 flow. Second operand 11 states and 181 transitions. [2024-06-27 21:33:03,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 728 transitions, 13191 flow [2024-06-27 21:33:06,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 728 transitions, 12963 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 21:33:06,499 INFO L231 Difference]: Finished difference. Result has 446 places, 683 transitions, 11515 flow [2024-06-27 21:33:06,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11259, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11515, PETRI_PLACES=446, PETRI_TRANSITIONS=683} [2024-06-27 21:33:06,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-27 21:33:06,500 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 683 transitions, 11515 flow [2024-06-27 21:33:06,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:06,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:06,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:06,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:33:06,500 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:06,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:06,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1491983374, now seen corresponding path program 8 times [2024-06-27 21:33:06,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:06,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158793919] [2024-06-27 21:33:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:06,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:08,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:08,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158793919] [2024-06-27 21:33:08,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158793919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:08,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:08,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 21:33:08,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567741637] [2024-06-27 21:33:08,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:08,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 21:33:08,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:08,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 21:33:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 21:33:08,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:33:08,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 683 transitions, 11515 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:33:08,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:08,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:33:08,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:11,381 INFO L124 PetriNetUnfolderBase]: 6019/9302 cut-off events. [2024-06-27 21:33:11,382 INFO L125 PetriNetUnfolderBase]: For 932858/932858 co-relation queries the response was YES. [2024-06-27 21:33:11,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80223 conditions, 9302 events. 6019/9302 cut-off events. For 932858/932858 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 57404 event pairs, 1202 based on Foata normal form. 12/9313 useless extension candidates. Maximal degree in co-relation 80013. Up to 8516 conditions per place. [2024-06-27 21:33:11,540 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 635 selfloop transitions, 107 changer transitions 0/745 dead transitions. [2024-06-27 21:33:11,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 745 transitions, 13333 flow [2024-06-27 21:33:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:33:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:33:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-06-27 21:33:11,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090056285178236 [2024-06-27 21:33:11,541 INFO L175 Difference]: Start difference. First operand has 446 places, 683 transitions, 11515 flow. Second operand 13 states and 218 transitions. [2024-06-27 21:33:11,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 745 transitions, 13333 flow [2024-06-27 21:33:15,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 745 transitions, 13109 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-27 21:33:15,408 INFO L231 Difference]: Finished difference. Result has 450 places, 684 transitions, 11583 flow [2024-06-27 21:33:15,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11291, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11583, PETRI_PLACES=450, PETRI_TRANSITIONS=684} [2024-06-27 21:33:15,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-27 21:33:15,417 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 684 transitions, 11583 flow [2024-06-27 21:33:15,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:33:15,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:15,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:15,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:33:15,417 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:15,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:15,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1491868054, now seen corresponding path program 9 times [2024-06-27 21:33:15,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:15,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146938803] [2024-06-27 21:33:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:15,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:17,140 INFO 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 21:33:17,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:17,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146938803] [2024-06-27 21:33:17,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146938803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:17,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:17,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 21:33:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788486773] [2024-06-27 21:33:17,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:17,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 21:33:17,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:17,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 21:33:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 21:33:17,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:33:17,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 684 transitions, 11583 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:33:17,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:17,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:33:17,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:20,219 INFO L124 PetriNetUnfolderBase]: 6121/9476 cut-off events. [2024-06-27 21:33:20,220 INFO L125 PetriNetUnfolderBase]: For 1001438/1001438 co-relation queries the response was YES. [2024-06-27 21:33:20,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82921 conditions, 9476 events. 6121/9476 cut-off events. For 1001438/1001438 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 58778 event pairs, 1244 based on Foata normal form. 12/9487 useless extension candidates. Maximal degree in co-relation 82710. Up to 8347 conditions per place. [2024-06-27 21:33:20,387 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 629 selfloop transitions, 113 changer transitions 0/745 dead transitions. [2024-06-27 21:33:20,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 745 transitions, 13813 flow [2024-06-27 21:33:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:33:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:33:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-27 21:33:20,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:33:20,388 INFO L175 Difference]: Start difference. First operand has 450 places, 684 transitions, 11583 flow. Second operand 12 states and 205 transitions. [2024-06-27 21:33:20,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 745 transitions, 13813 flow [2024-06-27 21:33:24,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 745 transitions, 13537 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-06-27 21:33:24,917 INFO L231 Difference]: Finished difference. Result has 451 places, 686 transitions, 11685 flow [2024-06-27 21:33:24,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11307, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11685, PETRI_PLACES=451, PETRI_TRANSITIONS=686} [2024-06-27 21:33:24,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-27 21:33:24,918 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 686 transitions, 11685 flow [2024-06-27 21:33:24,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:33:24,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:24,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:24,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:33:24,919 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:24,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1662685804, now seen corresponding path program 10 times [2024-06-27 21:33:24,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:24,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892868340] [2024-06-27 21:33:24,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:24,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:26,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:26,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892868340] [2024-06-27 21:33:26,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892868340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:26,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:26,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 21:33:26,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055941744] [2024-06-27 21:33:26,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:26,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 21:33:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 21:33:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 21:33:26,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:33:26,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 686 transitions, 11685 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:33:26,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:26,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:33:26,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:29,812 INFO L124 PetriNetUnfolderBase]: 6101/9444 cut-off events. [2024-06-27 21:33:29,812 INFO L125 PetriNetUnfolderBase]: For 973558/973558 co-relation queries the response was YES. [2024-06-27 21:33:29,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81532 conditions, 9444 events. 6101/9444 cut-off events. For 973558/973558 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 58603 event pairs, 1237 based on Foata normal form. 12/9455 useless extension candidates. Maximal degree in co-relation 81320. Up to 8824 conditions per place. [2024-06-27 21:33:29,952 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 623 selfloop transitions, 108 changer transitions 0/734 dead transitions. [2024-06-27 21:33:29,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 734 transitions, 13345 flow [2024-06-27 21:33:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:33:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:33:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 21:33:29,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-27 21:33:29,953 INFO L175 Difference]: Start difference. First operand has 451 places, 686 transitions, 11685 flow. Second operand 11 states and 184 transitions. [2024-06-27 21:33:29,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 734 transitions, 13345 flow [2024-06-27 21:33:34,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 734 transitions, 13093 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-27 21:33:34,513 INFO L231 Difference]: Finished difference. Result has 454 places, 686 transitions, 11655 flow [2024-06-27 21:33:34,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11433, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11655, PETRI_PLACES=454, PETRI_TRANSITIONS=686} [2024-06-27 21:33:34,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-27 21:33:34,513 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 686 transitions, 11655 flow [2024-06-27 21:33:34,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:33:34,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:34,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:34,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:33:34,515 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:34,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash -462493494, now seen corresponding path program 2 times [2024-06-27 21:33:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:34,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969713263] [2024-06-27 21:33:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:35,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969713263] [2024-06-27 21:33:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969713263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:35,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:35,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:35,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43991320] [2024-06-27 21:33:35,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:35,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:35,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:33:35,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 686 transitions, 11655 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:35,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:35,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:33:35,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:39,006 INFO L124 PetriNetUnfolderBase]: 6203/9588 cut-off events. [2024-06-27 21:33:39,007 INFO L125 PetriNetUnfolderBase]: For 972397/972399 co-relation queries the response was YES. [2024-06-27 21:33:39,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82583 conditions, 9588 events. 6203/9588 cut-off events. For 972397/972399 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 59577 event pairs, 1418 based on Foata normal form. 6/9593 useless extension candidates. Maximal degree in co-relation 82369. Up to 9067 conditions per place. [2024-06-27 21:33:39,239 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 619 selfloop transitions, 121 changer transitions 0/743 dead transitions. [2024-06-27 21:33:39,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 743 transitions, 13926 flow [2024-06-27 21:33:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:39,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:33:39,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 21:33:39,240 INFO L175 Difference]: Start difference. First operand has 454 places, 686 transitions, 11655 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:33:39,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 743 transitions, 13926 flow [2024-06-27 21:33:44,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 743 transitions, 13683 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 21:33:44,091 INFO L231 Difference]: Finished difference. Result has 455 places, 708 transitions, 12050 flow [2024-06-27 21:33:44,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11412, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12050, PETRI_PLACES=455, PETRI_TRANSITIONS=708} [2024-06-27 21:33:44,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 21:33:44,092 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 708 transitions, 12050 flow [2024-06-27 21:33:44,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:44,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:44,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:44,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:33:44,092 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:44,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1036542148, now seen corresponding path program 3 times [2024-06-27 21:33:44,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:44,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54719442] [2024-06-27 21:33:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:44,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:45,290 INFO 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 21:33:45,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:45,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54719442] [2024-06-27 21:33:45,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54719442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:45,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:45,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:45,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638478543] [2024-06-27 21:33:45,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:45,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:45,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:45,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:45,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:33:45,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 708 transitions, 12050 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:33:45,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:45,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:33:45,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:48,330 INFO L124 PetriNetUnfolderBase]: 6223/9614 cut-off events. [2024-06-27 21:33:48,330 INFO L125 PetriNetUnfolderBase]: For 990123/990123 co-relation queries the response was YES. [2024-06-27 21:33:48,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83013 conditions, 9614 events. 6223/9614 cut-off events. For 990123/990123 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 59652 event pairs, 1314 based on Foata normal form. 4/9617 useless extension candidates. Maximal degree in co-relation 82796. Up to 9083 conditions per place. [2024-06-27 21:33:48,514 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 616 selfloop transitions, 126 changer transitions 0/745 dead transitions. [2024-06-27 21:33:48,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 745 transitions, 14078 flow [2024-06-27 21:33:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:33:48,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 21:33:48,516 INFO L175 Difference]: Start difference. First operand has 455 places, 708 transitions, 12050 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:33:48,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 745 transitions, 14078 flow [2024-06-27 21:33:53,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 745 transitions, 13917 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 21:33:53,725 INFO L231 Difference]: Finished difference. Result has 461 places, 711 transitions, 12212 flow [2024-06-27 21:33:53,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11892, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12212, PETRI_PLACES=461, PETRI_TRANSITIONS=711} [2024-06-27 21:33:53,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-27 21:33:53,727 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 711 transitions, 12212 flow [2024-06-27 21:33:53,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:33:53,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:53,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:53,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:33:53,732 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:53,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1924004878, now seen corresponding path program 4 times [2024-06-27 21:33:53,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:53,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482611140] [2024-06-27 21:33:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:53,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:54,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:54,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482611140] [2024-06-27 21:33:54,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482611140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:54,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:54,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:54,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986921381] [2024-06-27 21:33:54,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:54,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:54,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:54,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:54,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:55,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:33:55,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 711 transitions, 12212 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:33:55,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:55,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:33:55,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:58,161 INFO L124 PetriNetUnfolderBase]: 6211/9598 cut-off events. [2024-06-27 21:33:58,161 INFO L125 PetriNetUnfolderBase]: For 993392/993392 co-relation queries the response was YES. [2024-06-27 21:33:58,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82710 conditions, 9598 events. 6211/9598 cut-off events. For 993392/993392 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 59491 event pairs, 1310 based on Foata normal form. 4/9601 useless extension candidates. Maximal degree in co-relation 82492. Up to 9075 conditions per place. [2024-06-27 21:33:58,344 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 603 selfloop transitions, 136 changer transitions 0/742 dead transitions. [2024-06-27 21:33:58,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 742 transitions, 13980 flow [2024-06-27 21:33:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:33:58,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 21:33:58,345 INFO L175 Difference]: Start difference. First operand has 461 places, 711 transitions, 12212 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:33:58,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 742 transitions, 13980 flow [2024-06-27 21:34:05,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 742 transitions, 13633 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-27 21:34:05,614 INFO L231 Difference]: Finished difference. Result has 462 places, 711 transitions, 12144 flow [2024-06-27 21:34:05,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11865, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12144, PETRI_PLACES=462, PETRI_TRANSITIONS=711} [2024-06-27 21:34:05,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-27 21:34:05,614 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 711 transitions, 12144 flow [2024-06-27 21:34:05,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:34:05,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:05,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:05,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:34:05,615 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:05,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:05,615 INFO L85 PathProgramCache]: Analyzing trace with hash 595330978, now seen corresponding path program 1 times [2024-06-27 21:34:05,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:05,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766035749] [2024-06-27 21:34:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:05,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:06,173 INFO 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 21:34:06,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766035749] [2024-06-27 21:34:06,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766035749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:06,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:06,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:06,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019266252] [2024-06-27 21:34:06,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:06,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:06,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:06,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:34:06,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 711 transitions, 12144 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:06,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:06,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:34:06,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:09,048 INFO L124 PetriNetUnfolderBase]: 6253/9660 cut-off events. [2024-06-27 21:34:09,048 INFO L125 PetriNetUnfolderBase]: For 1021436/1021440 co-relation queries the response was YES. [2024-06-27 21:34:09,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83837 conditions, 9660 events. 6253/9660 cut-off events. For 1021436/1021440 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 60123 event pairs, 1837 based on Foata normal form. 6/9662 useless extension candidates. Maximal degree in co-relation 83620. Up to 9426 conditions per place. [2024-06-27 21:34:09,269 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 673 selfloop transitions, 73 changer transitions 0/749 dead transitions. [2024-06-27 21:34:09,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 749 transitions, 14217 flow [2024-06-27 21:34:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:34:09,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 21:34:09,270 INFO L175 Difference]: Start difference. First operand has 462 places, 711 transitions, 12144 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:34:09,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 749 transitions, 14217 flow [2024-06-27 21:34:15,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 749 transitions, 14034 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:15,256 INFO L231 Difference]: Finished difference. Result has 467 places, 720 transitions, 12417 flow [2024-06-27 21:34:15,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11961, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12417, PETRI_PLACES=467, PETRI_TRANSITIONS=720} [2024-06-27 21:34:15,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-27 21:34:15,257 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 720 transitions, 12417 flow [2024-06-27 21:34:15,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:15,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:15,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:15,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:34:15,258 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:15,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash 595451134, now seen corresponding path program 1 times [2024-06-27 21:34:15,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:15,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349375461] [2024-06-27 21:34:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:15,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:15,937 INFO 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 21:34:15,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:15,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349375461] [2024-06-27 21:34:15,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349375461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:15,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:15,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:15,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590688958] [2024-06-27 21:34:15,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:15,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:15,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:15,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:15,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:34:15,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 720 transitions, 12417 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:15,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:15,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:34:15,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:19,112 INFO L124 PetriNetUnfolderBase]: 6310/9738 cut-off events. [2024-06-27 21:34:19,112 INFO L125 PetriNetUnfolderBase]: For 1069615/1069619 co-relation queries the response was YES. [2024-06-27 21:34:19,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85095 conditions, 9738 events. 6310/9738 cut-off events. For 1069615/1069619 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 60533 event pairs, 1849 based on Foata normal form. 8/9743 useless extension candidates. Maximal degree in co-relation 84876. Up to 9433 conditions per place. [2024-06-27 21:34:19,311 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 669 selfloop transitions, 89 changer transitions 0/761 dead transitions. [2024-06-27 21:34:19,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 761 transitions, 14440 flow [2024-06-27 21:34:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:34:19,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 21:34:19,313 INFO L175 Difference]: Start difference. First operand has 467 places, 720 transitions, 12417 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:34:19,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 761 transitions, 14440 flow [2024-06-27 21:34:26,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 761 transitions, 14292 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:26,733 INFO L231 Difference]: Finished difference. Result has 474 places, 731 transitions, 12687 flow [2024-06-27 21:34:26,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12269, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12687, PETRI_PLACES=474, PETRI_TRANSITIONS=731} [2024-06-27 21:34:26,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-27 21:34:26,734 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 731 transitions, 12687 flow [2024-06-27 21:34:26,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:26,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:26,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:26,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:34:26,735 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:26,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash 595450948, now seen corresponding path program 2 times [2024-06-27 21:34:26,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:26,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387153032] [2024-06-27 21:34:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:26,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:27,345 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 21:34:27,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:27,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387153032] [2024-06-27 21:34:27,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387153032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:27,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:27,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:27,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320973676] [2024-06-27 21:34:27,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:27,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:27,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:27,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:27,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:27,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:34:27,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 731 transitions, 12687 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:27,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:27,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:34:27,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:30,190 INFO L124 PetriNetUnfolderBase]: 6304/9730 cut-off events. [2024-06-27 21:34:30,191 INFO L125 PetriNetUnfolderBase]: For 1075065/1075069 co-relation queries the response was YES. [2024-06-27 21:34:30,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85620 conditions, 9730 events. 6304/9730 cut-off events. For 1075065/1075069 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 60519 event pairs, 1836 based on Foata normal form. 6/9733 useless extension candidates. Maximal degree in co-relation 85398. Up to 9542 conditions per place. [2024-06-27 21:34:30,382 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 687 selfloop transitions, 66 changer transitions 0/756 dead transitions. [2024-06-27 21:34:30,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 756 transitions, 14287 flow [2024-06-27 21:34:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:34:30,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-27 21:34:30,384 INFO L175 Difference]: Start difference. First operand has 474 places, 731 transitions, 12687 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:34:30,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 756 transitions, 14287 flow [2024-06-27 21:34:37,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 756 transitions, 14185 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-27 21:34:37,052 INFO L231 Difference]: Finished difference. Result has 481 places, 731 transitions, 12723 flow [2024-06-27 21:34:37,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12585, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12723, PETRI_PLACES=481, PETRI_TRANSITIONS=731} [2024-06-27 21:34:37,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-27 21:34:37,054 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 731 transitions, 12723 flow [2024-06-27 21:34:37,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:37,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:37,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:37,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:34:37,056 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:37,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash 770105462, now seen corresponding path program 2 times [2024-06-27 21:34:37,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:37,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785849961] [2024-06-27 21:34:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:37,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:37,877 INFO 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 21:34:37,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:37,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785849961] [2024-06-27 21:34:37,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785849961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:37,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:37,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:37,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875777394] [2024-06-27 21:34:37,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:37,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:37,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:37,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:34:37,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 731 transitions, 12723 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:37,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:37,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:34:37,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:41,580 INFO L124 PetriNetUnfolderBase]: 6324/9759 cut-off events. [2024-06-27 21:34:41,581 INFO L125 PetriNetUnfolderBase]: For 1107317/1107321 co-relation queries the response was YES. [2024-06-27 21:34:41,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86095 conditions, 9759 events. 6324/9759 cut-off events. For 1107317/1107321 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 60677 event pairs, 1873 based on Foata normal form. 8/9763 useless extension candidates. Maximal degree in co-relation 85870. Up to 9484 conditions per place. [2024-06-27 21:34:41,745 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 675 selfloop transitions, 89 changer transitions 0/767 dead transitions. [2024-06-27 21:34:41,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 767 transitions, 14686 flow [2024-06-27 21:34:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:34:41,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-27 21:34:41,747 INFO L175 Difference]: Start difference. First operand has 481 places, 731 transitions, 12723 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:34:41,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 767 transitions, 14686 flow [2024-06-27 21:34:47,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 767 transitions, 14470 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:47,858 INFO L231 Difference]: Finished difference. Result has 487 places, 741 transitions, 12886 flow [2024-06-27 21:34:47,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12507, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12886, PETRI_PLACES=487, PETRI_TRANSITIONS=741} [2024-06-27 21:34:47,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-27 21:34:47,859 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 741 transitions, 12886 flow [2024-06-27 21:34:47,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:47,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:47,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:47,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:34:47,860 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:47,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1627889122, now seen corresponding path program 3 times [2024-06-27 21:34:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:47,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568027767] [2024-06-27 21:34:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:47,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:48,365 INFO 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 21:34:48,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568027767] [2024-06-27 21:34:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568027767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:48,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:48,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:48,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881022893] [2024-06-27 21:34:48,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:48,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:48,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:48,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:48,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:48,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:34:48,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 741 transitions, 12886 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:48,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:48,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:34:48,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:52,103 INFO L124 PetriNetUnfolderBase]: 6318/9750 cut-off events. [2024-06-27 21:34:52,103 INFO L125 PetriNetUnfolderBase]: For 1110659/1110663 co-relation queries the response was YES. [2024-06-27 21:34:52,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86781 conditions, 9750 events. 6318/9750 cut-off events. For 1110659/1110663 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 60737 event pairs, 1867 based on Foata normal form. 6/9753 useless extension candidates. Maximal degree in co-relation 86551. Up to 9591 conditions per place. [2024-06-27 21:34:52,266 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 697 selfloop transitions, 62 changer transitions 0/762 dead transitions. [2024-06-27 21:34:52,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 762 transitions, 14482 flow [2024-06-27 21:34:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 21:34:52,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-27 21:34:52,267 INFO L175 Difference]: Start difference. First operand has 487 places, 741 transitions, 12886 flow. Second operand 9 states and 137 transitions. [2024-06-27 21:34:52,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 762 transitions, 14482 flow [2024-06-27 21:34:58,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 762 transitions, 14244 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:58,815 INFO L231 Difference]: Finished difference. Result has 492 places, 741 transitions, 12778 flow [2024-06-27 21:34:58,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12648, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12778, PETRI_PLACES=492, PETRI_TRANSITIONS=741} [2024-06-27 21:34:58,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-27 21:34:58,816 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 741 transitions, 12778 flow [2024-06-27 21:34:58,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:58,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:58,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:58,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:34:58,817 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:58,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1628126458, now seen corresponding path program 3 times [2024-06-27 21:34:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:58,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887932775] [2024-06-27 21:34:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:59,460 INFO 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 21:34:59,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:59,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887932775] [2024-06-27 21:34:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887932775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:59,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:59,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566965610] [2024-06-27 21:34:59,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:59,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:59,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:59,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:59,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:34:59,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 741 transitions, 12778 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:59,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:59,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:34:59,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:03,163 INFO L124 PetriNetUnfolderBase]: 6321/9754 cut-off events. [2024-06-27 21:35:03,164 INFO L125 PetriNetUnfolderBase]: For 1136000/1136002 co-relation queries the response was YES. [2024-06-27 21:35:03,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86419 conditions, 9754 events. 6321/9754 cut-off events. For 1136000/1136002 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 60668 event pairs, 1968 based on Foata normal form. 9/9762 useless extension candidates. Maximal degree in co-relation 86188. Up to 9496 conditions per place. [2024-06-27 21:35:03,336 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 678 selfloop transitions, 88 changer transitions 0/769 dead transitions. [2024-06-27 21:35:03,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 769 transitions, 14510 flow [2024-06-27 21:35:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:35:03,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-27 21:35:03,360 INFO L175 Difference]: Start difference. First operand has 492 places, 741 transitions, 12778 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:35:03,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 769 transitions, 14510 flow [2024-06-27 21:35:10,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 769 transitions, 14297 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-27 21:35:10,016 INFO L231 Difference]: Finished difference. Result has 492 places, 744 transitions, 12856 flow [2024-06-27 21:35:10,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12573, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12856, PETRI_PLACES=492, PETRI_TRANSITIONS=744} [2024-06-27 21:35:10,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-27 21:35:10,017 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 744 transitions, 12856 flow [2024-06-27 21:35:10,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:10,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:10,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:10,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:35:10,018 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:10,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:10,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1628135386, now seen corresponding path program 1 times [2024-06-27 21:35:10,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:10,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877700673] [2024-06-27 21:35:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:10,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:10,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:10,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877700673] [2024-06-27 21:35:10,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877700673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:10,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:10,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:10,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716839044] [2024-06-27 21:35:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:10,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:10,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:10,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:10,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:10,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:35:10,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 744 transitions, 12856 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:35:10,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:10,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:35:10,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:14,726 INFO L124 PetriNetUnfolderBase]: 6337/9779 cut-off events. [2024-06-27 21:35:14,726 INFO L125 PetriNetUnfolderBase]: For 1137562/1137566 co-relation queries the response was YES. [2024-06-27 21:35:14,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86789 conditions, 9779 events. 6337/9779 cut-off events. For 1137562/1137566 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 60866 event pairs, 1875 based on Foata normal form. 8/9785 useless extension candidates. Maximal degree in co-relation 86557. Up to 9535 conditions per place. [2024-06-27 21:35:14,885 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 684 selfloop transitions, 83 changer transitions 0/770 dead transitions. [2024-06-27 21:35:14,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 770 transitions, 14528 flow [2024-06-27 21:35:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:35:14,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:35:14,886 INFO L175 Difference]: Start difference. First operand has 492 places, 744 transitions, 12856 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:35:14,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 770 transitions, 14528 flow [2024-06-27 21:35:21,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 770 transitions, 14174 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 21:35:21,663 INFO L231 Difference]: Finished difference. Result has 493 places, 746 transitions, 12723 flow [2024-06-27 21:35:21,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12502, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12723, PETRI_PLACES=493, PETRI_TRANSITIONS=746} [2024-06-27 21:35:21,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-27 21:35:21,665 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 746 transitions, 12723 flow [2024-06-27 21:35:21,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:35:21,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:21,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:21,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:35:21,665 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:21,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash 140688052, now seen corresponding path program 11 times [2024-06-27 21:35:21,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:21,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087142520] [2024-06-27 21:35:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:21,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:23,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:23,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087142520] [2024-06-27 21:35:23,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087142520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:23,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:23,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:35:23,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885233013] [2024-06-27 21:35:23,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:23,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:35:23,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:23,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:35:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:35:23,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:35:23,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 746 transitions, 12723 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:23,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:23,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:35:23,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:26,597 INFO L124 PetriNetUnfolderBase]: 6378/9861 cut-off events. [2024-06-27 21:35:26,597 INFO L125 PetriNetUnfolderBase]: For 1193102/1193104 co-relation queries the response was YES. [2024-06-27 21:35:26,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87418 conditions, 9861 events. 6378/9861 cut-off events. For 1193102/1193104 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 61658 event pairs, 1590 based on Foata normal form. 14/9874 useless extension candidates. Maximal degree in co-relation 87186. Up to 9094 conditions per place. [2024-06-27 21:35:26,778 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 682 selfloop transitions, 104 changer transitions 0/789 dead transitions. [2024-06-27 21:35:26,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 789 transitions, 14541 flow [2024-06-27 21:35:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 21:35:26,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-27 21:35:26,780 INFO L175 Difference]: Start difference. First operand has 493 places, 746 transitions, 12723 flow. Second operand 10 states and 163 transitions. [2024-06-27 21:35:26,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 789 transitions, 14541 flow [2024-06-27 21:35:33,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 789 transitions, 14377 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:33,449 INFO L231 Difference]: Finished difference. Result has 497 places, 747 transitions, 12855 flow [2024-06-27 21:35:33,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12559, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12855, PETRI_PLACES=497, PETRI_TRANSITIONS=747} [2024-06-27 21:35:33,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-27 21:35:33,449 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 747 transitions, 12855 flow [2024-06-27 21:35:33,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:33,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:33,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:33,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:35:33,450 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:33,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1403158604, now seen corresponding path program 12 times [2024-06-27 21:35:33,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:33,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956671273] [2024-06-27 21:35:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:34,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:34,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956671273] [2024-06-27 21:35:34,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956671273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:34,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:34,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 21:35:34,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89266654] [2024-06-27 21:35:34,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:34,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 21:35:34,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:34,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 21:35:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 21:35:34,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:35:34,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 747 transitions, 12855 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:35:34,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:34,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:35:34,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:38,708 INFO L124 PetriNetUnfolderBase]: 6419/9930 cut-off events. [2024-06-27 21:35:38,708 INFO L125 PetriNetUnfolderBase]: For 1226606/1226608 co-relation queries the response was YES. [2024-06-27 21:35:39,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88571 conditions, 9930 events. 6419/9930 cut-off events. For 1226606/1226608 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 62307 event pairs, 1528 based on Foata normal form. 14/9943 useless extension candidates. Maximal degree in co-relation 88337. Up to 8976 conditions per place. [2024-06-27 21:35:39,061 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 674 selfloop transitions, 113 changer transitions 0/790 dead transitions. [2024-06-27 21:35:39,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 790 transitions, 14675 flow [2024-06-27 21:35:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:35:39,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:35:39,063 INFO L175 Difference]: Start difference. First operand has 497 places, 747 transitions, 12855 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:35:39,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 790 transitions, 14675 flow [2024-06-27 21:35:46,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 790 transitions, 14395 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-27 21:35:46,783 INFO L231 Difference]: Finished difference. Result has 499 places, 748 transitions, 12891 flow [2024-06-27 21:35:46,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12579, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12891, PETRI_PLACES=499, PETRI_TRANSITIONS=748} [2024-06-27 21:35:46,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-27 21:35:46,784 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 748 transitions, 12891 flow [2024-06-27 21:35:46,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:35:46,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:46,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:46,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:35:46,784 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:46,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:46,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1055259928, now seen corresponding path program 13 times [2024-06-27 21:35:46,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:46,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107825734] [2024-06-27 21:35:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:46,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:48,016 INFO 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 21:35:48,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:48,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107825734] [2024-06-27 21:35:48,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107825734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:48,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:48,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:35:48,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552455953] [2024-06-27 21:35:48,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:48,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:35:48,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:48,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:35:48,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:35:48,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:35:48,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 748 transitions, 12891 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:48,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:48,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:35:48,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:51,788 INFO L124 PetriNetUnfolderBase]: 6460/9991 cut-off events. [2024-06-27 21:35:51,788 INFO L125 PetriNetUnfolderBase]: For 1203492/1203494 co-relation queries the response was YES. [2024-06-27 21:35:51,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88775 conditions, 9991 events. 6460/9991 cut-off events. For 1203492/1203494 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 62502 event pairs, 1431 based on Foata normal form. 14/10004 useless extension candidates. Maximal degree in co-relation 88540. Up to 9012 conditions per place. [2024-06-27 21:35:51,966 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 689 selfloop transitions, 99 changer transitions 0/791 dead transitions. [2024-06-27 21:35:51,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 791 transitions, 14709 flow [2024-06-27 21:35:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:35:51,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-27 21:35:51,967 INFO L175 Difference]: Start difference. First operand has 499 places, 748 transitions, 12891 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:35:51,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 791 transitions, 14709 flow [2024-06-27 21:35:58,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 791 transitions, 14413 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-27 21:35:58,027 INFO L231 Difference]: Finished difference. Result has 501 places, 749 transitions, 12887 flow [2024-06-27 21:35:58,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12599, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12887, PETRI_PLACES=501, PETRI_TRANSITIONS=749} [2024-06-27 21:35:58,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 459 predicate places. [2024-06-27 21:35:58,028 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 749 transitions, 12887 flow [2024-06-27 21:35:58,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:58,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:58,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:58,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:35:58,029 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:58,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:58,029 INFO L85 PathProgramCache]: Analyzing trace with hash 816058626, now seen corresponding path program 14 times [2024-06-27 21:35:58,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:58,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344600694] [2024-06-27 21:35:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:58,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat