./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_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/mix024_power.opt_pso.opt_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/mix024_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix024_power.opt_pso.opt_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 20:10:47,859 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:10:47,930 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:10:47,935 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:10:47,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:10:47,961 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:10:47,962 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:10:47,962 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:10:47,973 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:10:47,974 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:10:47,974 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:10:47,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:10:47,975 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:10:47,978 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:10:47,978 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:10:47,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:10:47,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:10:47,979 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:10:47,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:10:47,980 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:10:47,980 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:10:47,980 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:10:47,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:10:47,981 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:10:47,981 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:10:47,981 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:10:47,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:10:47,981 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:10:47,982 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:10:47,982 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:10:47,982 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:10:47,983 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:10:47,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:10:47,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:10:47,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:10:47,983 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:10:47,983 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:10:47,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:10:47,984 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:10:47,984 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:10:47,985 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:10:47,985 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:10:47,985 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:10:47,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:10:48,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:10:48,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:10:48,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:10:48,235 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:10:48,236 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:10:48,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-27 20:10:48,421 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:10:48,422 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:10:48,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-27 20:10:49,368 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:10:49,564 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:10:49,573 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-27 20:10:49,583 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c68ad6bd7/349531c092f747ebb812837c2a284b83/FLAG80351f12e [2024-06-27 20:10:49,595 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c68ad6bd7/349531c092f747ebb812837c2a284b83 [2024-06-27 20:10:49,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:10:49,596 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:10:49,597 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:10:49,597 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:10:49,601 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:10:49,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:48" (1/2) ... [2024-06-27 20:10:49,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4eeb02 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:49, skipping insertion in model container [2024-06-27 20:10:49,602 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:48" (1/2) ... [2024-06-27 20:10:49,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c930f93 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:49, skipping insertion in model container [2024-06-27 20:10:49,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:10:49" (2/2) ... [2024-06-27 20:10:49,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4eeb02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:49, skipping insertion in model container [2024-06-27 20:10:49,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:10:49" (2/2) ... [2024-06-27 20:10:49,604 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:10:49,676 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:10:49,677 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-27 20:10:49,677 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-27 20:10:49,678 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-27 20:10:49,678 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:10:49,678 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-27 20:10:49,716 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:10:50,044 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:10:50,053 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:10:50,154 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:10:50,191 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:10:50,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50 WrapperNode [2024-06-27 20:10:50,192 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:10:50,192 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:10:50,193 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:10:50,193 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:10:50,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,223 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,256 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-27 20:10:50,258 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:10:50,259 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:10:50,260 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:10:50,260 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:10:50,268 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,298 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 20:10:50,298 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,298 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,312 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,314 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,315 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,317 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:10:50,319 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:10:50,319 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:10:50,319 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:10:50,320 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (1/1) ... [2024-06-27 20:10:50,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:10:50,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:10:50,347 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 20:10:50,349 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 20:10:50,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:10:50,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:10:50,371 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:10:50,371 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:10:50,371 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:10:50,371 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:10:50,372 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:10:50,372 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:10:50,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:10:50,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:10:50,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:10:50,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:10:50,373 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 20:10:50,473 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:10:50,474 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:10:50,754 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:10:50,754 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:10:50,859 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:10:50,859 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:10:50,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:10:50 BoogieIcfgContainer [2024-06-27 20:10:50,861 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:10:50,863 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:10:50,863 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:10:50,865 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:10:50,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:48" (1/4) ... [2024-06-27 20:10:50,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355ae81d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:10:50, skipping insertion in model container [2024-06-27 20:10:50,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:10:49" (2/4) ... [2024-06-27 20:10:50,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355ae81d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:10:50, skipping insertion in model container [2024-06-27 20:10:50,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:50" (3/4) ... [2024-06-27 20:10:50,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355ae81d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:10:50, skipping insertion in model container [2024-06-27 20:10:50,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:10:50" (4/4) ... [2024-06-27 20:10:50,868 INFO L112 eAbstractionObserver]: Analyzing ICFG mix024_power.opt_pso.opt_rmo.opt.i [2024-06-27 20:10:50,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:10:50,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:10:50,881 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:10:50,919 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:10:50,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 20:10:50,971 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 20:10:50,972 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:10:50,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:10:50,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 20:10:50,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 20:10:50,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:10:50,996 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;@4985fcc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:10:50,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:10:51,001 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:10:51,002 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:10:51,002 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:10:51,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:51,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:10:51,003 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 20:10:51,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash 372387487, now seen corresponding path program 1 times [2024-06-27 20:10:51,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:51,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538952091] [2024-06-27 20:10:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:51,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:51,878 INFO 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 20:10:51,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:51,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538952091] [2024-06-27 20:10:51,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538952091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:51,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:51,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:10:51,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402300861] [2024-06-27 20:10:51,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:51,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:10:51,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:51,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:10:51,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:10:51,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 20:10:51,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:51,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:51,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 20:10:51,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:52,346 INFO L124 PetriNetUnfolderBase]: 1407/2253 cut-off events. [2024-06-27 20:10:52,347 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 20:10:52,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 2253 events. 1407/2253 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11626 event pairs, 989 based on Foata normal form. 1/2168 useless extension candidates. Maximal degree in co-relation 4445. Up to 2105 conditions per place. [2024-06-27 20:10:52,364 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 20:10:52,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-27 20:10:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:10:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:10:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-27 20:10:52,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-27 20:10:52,375 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-27 20:10:52,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-27 20:10:52,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:52,381 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 20:10:52,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 20:10:52,385 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 20:10:52,386 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 20:10:52,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:52,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:52,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:52,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:10:52,387 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 20:10:52,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1382137662, now seen corresponding path program 1 times [2024-06-27 20:10:52,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:52,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546704030] [2024-06-27 20:10:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:52,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:52,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:52,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546704030] [2024-06-27 20:10:52,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546704030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:52,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:52,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:10:52,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988049076] [2024-06-27 20:10:52,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:52,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:10:52,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:52,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:10:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:10:53,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 20:10:53,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 20:10:53,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:53,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 20:10:53,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:53,297 INFO L124 PetriNetUnfolderBase]: 1653/2544 cut-off events. [2024-06-27 20:10:53,297 INFO L125 PetriNetUnfolderBase]: For 463/463 co-relation queries the response was YES. [2024-06-27 20:10:53,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5733 conditions, 2544 events. 1653/2544 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12794 event pairs, 1038 based on Foata normal form. 3/2544 useless extension candidates. Maximal degree in co-relation 5721. Up to 2441 conditions per place. [2024-06-27 20:10:53,308 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 20:10:53,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-27 20:10:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:10:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:10:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 20:10:53,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-27 20:10:53,310 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-27 20:10:53,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-27 20:10:53,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:10:53,312 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 20:10:53,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 20:10:53,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 20:10:53,313 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 20:10:53,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 20:10:53,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:53,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:53,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:10:53,314 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 20:10:53,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash -103403870, now seen corresponding path program 1 times [2024-06-27 20:10:53,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:53,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411131629] [2024-06-27 20:10:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:53,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:53,779 INFO 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 20:10:53,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:53,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411131629] [2024-06-27 20:10:53,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411131629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:53,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:53,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:10:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942410199] [2024-06-27 20:10:53,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:10:53,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:10:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:10:53,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 20:10:53,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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 20:10:53,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:53,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 20:10:53,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:54,140 INFO L124 PetriNetUnfolderBase]: 1947/2973 cut-off events. [2024-06-27 20:10:54,141 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2024-06-27 20:10:54,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7386 conditions, 2973 events. 1947/2973 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14718 event pairs, 1135 based on Foata normal form. 3/2973 useless extension candidates. Maximal degree in co-relation 7372. Up to 2853 conditions per place. [2024-06-27 20:10:54,154 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-27 20:10:54,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 324 flow [2024-06-27 20:10:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:10:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:10:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 20:10:54,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-27 20:10:54,159 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 121 transitions. [2024-06-27 20:10:54,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 324 flow [2024-06-27 20:10:54,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:10:54,162 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-27 20:10:54,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 20:10:54,163 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-27 20:10:54,164 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-27 20:10:54,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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 20:10:54,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:54,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:54,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:10:54,165 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:54,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:54,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2086851605, now seen corresponding path program 1 times [2024-06-27 20:10:54,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:54,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396579080] [2024-06-27 20:10:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:54,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:54,785 INFO 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 20:10:54,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:54,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396579080] [2024-06-27 20:10:54,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396579080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:54,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:54,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:10:54,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757833520] [2024-06-27 20:10:54,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:54,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:10:54,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:54,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:10:54,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:10:54,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 20:10:54,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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 20:10:54,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:54,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 20:10:54,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:55,210 INFO L124 PetriNetUnfolderBase]: 1935/2939 cut-off events. [2024-06-27 20:10:55,210 INFO L125 PetriNetUnfolderBase]: For 2815/2815 co-relation queries the response was YES. [2024-06-27 20:10:55,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7997 conditions, 2939 events. 1935/2939 cut-off events. For 2815/2815 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14456 event pairs, 843 based on Foata normal form. 6/2943 useless extension candidates. Maximal degree in co-relation 7982. Up to 2805 conditions per place. [2024-06-27 20:10:55,223 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 56 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-27 20:10:55,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 406 flow [2024-06-27 20:10:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 20:10:55,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-27 20:10:55,225 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 144 transitions. [2024-06-27 20:10:55,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 406 flow [2024-06-27 20:10:55,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:55,227 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-27 20:10:55,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-27 20:10:55,228 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-27 20:10:55,228 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-27 20:10:55,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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 20:10:55,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:55,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:55,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:10:55,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:55,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1624971842, now seen corresponding path program 1 times [2024-06-27 20:10:55,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:55,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642747210] [2024-06-27 20:10:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:55,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:55,786 INFO 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 20:10:55,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:55,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642747210] [2024-06-27 20:10:55,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642747210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:55,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:55,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:10:55,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044022072] [2024-06-27 20:10:55,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:55,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:10:55,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:55,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:10:55,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:10:55,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 20:10:55,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:55,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:55,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 20:10:55,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:56,150 INFO L124 PetriNetUnfolderBase]: 1556/2546 cut-off events. [2024-06-27 20:10:56,151 INFO L125 PetriNetUnfolderBase]: For 3635/3635 co-relation queries the response was YES. [2024-06-27 20:10:56,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7321 conditions, 2546 events. 1556/2546 cut-off events. For 3635/3635 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13485 event pairs, 785 based on Foata normal form. 2/2504 useless extension candidates. Maximal degree in co-relation 7304. Up to 2304 conditions per place. [2024-06-27 20:10:56,162 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-27 20:10:56,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 360 flow [2024-06-27 20:10:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:10:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:10:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 20:10:56,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-27 20:10:56,164 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 5 states and 106 transitions. [2024-06-27 20:10:56,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 360 flow [2024-06-27 20:10:56,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 326 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:10:56,166 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-27 20:10:56,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-27 20:10:56,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-27 20:10:56,167 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-27 20:10:56,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:56,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:56,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:56,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:10:56,168 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 20:10:56,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1165481396, now seen corresponding path program 1 times [2024-06-27 20:10:56,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:56,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888962832] [2024-06-27 20:10:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:56,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:56,779 INFO 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 20:10:56,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:56,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888962832] [2024-06-27 20:10:56,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888962832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:56,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:56,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:10:56,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992094645] [2024-06-27 20:10:56,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:56,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:10:56,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:10:56,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:10:56,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:10:56,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:56,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:56,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:10:56,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:57,227 INFO L124 PetriNetUnfolderBase]: 1842/2876 cut-off events. [2024-06-27 20:10:57,227 INFO L125 PetriNetUnfolderBase]: For 5868/5868 co-relation queries the response was YES. [2024-06-27 20:10:57,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8952 conditions, 2876 events. 1842/2876 cut-off events. For 5868/5868 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14515 event pairs, 927 based on Foata normal form. 3/2877 useless extension candidates. Maximal degree in co-relation 8933. Up to 2684 conditions per place. [2024-06-27 20:10:57,249 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-06-27 20:10:57,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 480 flow [2024-06-27 20:10:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 20:10:57,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 20:10:57,250 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 126 transitions. [2024-06-27 20:10:57,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 480 flow [2024-06-27 20:10:57,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 77 transitions, 458 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:57,254 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 327 flow [2024-06-27 20:10:57,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-06-27 20:10:57,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-27 20:10:57,256 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 327 flow [2024-06-27 20:10:57,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:57,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:57,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:57,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:10:57,257 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 20:10:57,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:57,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1005910407, now seen corresponding path program 1 times [2024-06-27 20:10:57,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:57,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859871254] [2024-06-27 20:10:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:57,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:57,822 INFO 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 20:10:57,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:57,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859871254] [2024-06-27 20:10:57,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859871254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:57,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:57,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:10:57,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190288146] [2024-06-27 20:10:57,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:57,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:10:57,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:57,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:10:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:10:57,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:10:57,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:57,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:57,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:10:57,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:58,363 INFO L124 PetriNetUnfolderBase]: 1902/2982 cut-off events. [2024-06-27 20:10:58,364 INFO L125 PetriNetUnfolderBase]: For 9315/9325 co-relation queries the response was YES. [2024-06-27 20:10:58,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10393 conditions, 2982 events. 1902/2982 cut-off events. For 9315/9325 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15149 event pairs, 932 based on Foata normal form. 2/2971 useless extension candidates. Maximal degree in co-relation 10371. Up to 2774 conditions per place. [2024-06-27 20:10:58,378 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-27 20:10:58,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 539 flow [2024-06-27 20:10:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 20:10:58,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 20:10:58,379 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 327 flow. Second operand 6 states and 123 transitions. [2024-06-27 20:10:58,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 539 flow [2024-06-27 20:10:58,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 523 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 20:10:58,385 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 371 flow [2024-06-27 20:10:58,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-27 20:10:58,385 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-27 20:10:58,386 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 371 flow [2024-06-27 20:10:58,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:58,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:58,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:58,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:10:58,386 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 20:10:58,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1770175965, now seen corresponding path program 2 times [2024-06-27 20:10:58,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:58,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213033658] [2024-06-27 20:10:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:58,996 INFO 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 20:10:58,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:58,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213033658] [2024-06-27 20:10:58,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213033658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:58,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:58,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:10:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616493706] [2024-06-27 20:10:58,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:58,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:10:58,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:10:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:10:59,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:10:59,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 371 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:59,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:59,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:10:59,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:59,452 INFO L124 PetriNetUnfolderBase]: 1897/2977 cut-off events. [2024-06-27 20:10:59,452 INFO L125 PetriNetUnfolderBase]: For 11997/12019 co-relation queries the response was YES. [2024-06-27 20:10:59,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11042 conditions, 2977 events. 1897/2977 cut-off events. For 11997/12019 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15163 event pairs, 939 based on Foata normal form. 10/2973 useless extension candidates. Maximal degree in co-relation 11017. Up to 2749 conditions per place. [2024-06-27 20:10:59,465 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-27 20:10:59,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 581 flow [2024-06-27 20:10:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 20:10:59,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-27 20:10:59,467 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 371 flow. Second operand 6 states and 122 transitions. [2024-06-27 20:10:59,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 581 flow [2024-06-27 20:10:59,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 545 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:10:59,473 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 411 flow [2024-06-27 20:10:59,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-27 20:10:59,475 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-27 20:10:59,476 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 411 flow [2024-06-27 20:10:59,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:59,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:59,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:59,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:10:59,476 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:59,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1327749694, now seen corresponding path program 1 times [2024-06-27 20:10:59,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:59,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412096536] [2024-06-27 20:10:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:00,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:00,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412096536] [2024-06-27 20:11:00,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412096536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:00,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:00,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:00,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384406397] [2024-06-27 20:11:00,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:00,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:00,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:00,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 20:11:00,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 411 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:00,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:00,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 20:11:00,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:00,985 INFO L124 PetriNetUnfolderBase]: 1997/3049 cut-off events. [2024-06-27 20:11:00,985 INFO L125 PetriNetUnfolderBase]: For 14849/14863 co-relation queries the response was YES. [2024-06-27 20:11:00,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11918 conditions, 3049 events. 1997/3049 cut-off events. For 14849/14863 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15004 event pairs, 645 based on Foata normal form. 6/3028 useless extension candidates. Maximal degree in co-relation 11893. Up to 2843 conditions per place. [2024-06-27 20:11:00,998 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2024-06-27 20:11:00,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 745 flow [2024-06-27 20:11:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 20:11:01,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319767441860465 [2024-06-27 20:11:01,000 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 411 flow. Second operand 8 states and 183 transitions. [2024-06-27 20:11:01,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 745 flow [2024-06-27 20:11:01,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 110 transitions, 693 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:01,005 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 442 flow [2024-06-27 20:11:01,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-27 20:11:01,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-27 20:11:01,007 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 442 flow [2024-06-27 20:11:01,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:01,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:01,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:01,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:11:01,007 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 20:11:01,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:01,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1770185885, now seen corresponding path program 1 times [2024-06-27 20:11:01,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:01,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434618189] [2024-06-27 20:11:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:01,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:01,811 INFO 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 20:11:01,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:01,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434618189] [2024-06-27 20:11:01,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434618189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:01,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:01,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980945108] [2024-06-27 20:11:01,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:01,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:01,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:01,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:11:01,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 442 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 20:11:01,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:01,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:11:01,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:02,397 INFO L124 PetriNetUnfolderBase]: 1832/2885 cut-off events. [2024-06-27 20:11:02,397 INFO L125 PetriNetUnfolderBase]: For 17584/17584 co-relation queries the response was YES. [2024-06-27 20:11:02,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11919 conditions, 2885 events. 1832/2885 cut-off events. For 17584/17584 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14701 event pairs, 727 based on Foata normal form. 3/2886 useless extension candidates. Maximal degree in co-relation 11892. Up to 2668 conditions per place. [2024-06-27 20:11:02,410 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 67 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-27 20:11:02,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 740 flow [2024-06-27 20:11:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 20:11:02,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-27 20:11:02,412 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 442 flow. Second operand 7 states and 144 transitions. [2024-06-27 20:11:02,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 740 flow [2024-06-27 20:11:02,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 683 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:02,418 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 478 flow [2024-06-27 20:11:02,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=478, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-27 20:11:02,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-27 20:11:02,420 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 478 flow [2024-06-27 20:11:02,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 20:11:02,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:02,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:02,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:11:02,421 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 20:11:02,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:02,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1195474085, now seen corresponding path program 1 times [2024-06-27 20:11:02,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:02,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922712164] [2024-06-27 20:11:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:02,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:03,037 INFO 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 20:11:03,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:03,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922712164] [2024-06-27 20:11:03,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922712164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:03,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:03,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:03,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660950364] [2024-06-27 20:11:03,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:03,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:03,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:03,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:03,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:03,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:03,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 478 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:03,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:03,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:03,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:03,585 INFO L124 PetriNetUnfolderBase]: 2058/3123 cut-off events. [2024-06-27 20:11:03,586 INFO L125 PetriNetUnfolderBase]: For 23439/23458 co-relation queries the response was YES. [2024-06-27 20:11:03,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13770 conditions, 3123 events. 2058/3123 cut-off events. For 23439/23458 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15232 event pairs, 796 based on Foata normal form. 3/3100 useless extension candidates. Maximal degree in co-relation 13741. Up to 2953 conditions per place. [2024-06-27 20:11:03,603 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 79 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-27 20:11:03,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 102 transitions, 764 flow [2024-06-27 20:11:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:11:03,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 20:11:03,604 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 478 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:11:03,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 102 transitions, 764 flow [2024-06-27 20:11:03,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 701 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:03,613 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 493 flow [2024-06-27 20:11:03,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=493, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-27 20:11:03,613 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-27 20:11:03,613 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 493 flow [2024-06-27 20:11:03,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:03,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:03,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:03,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:11:03,614 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 20:11:03,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:03,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1195294595, now seen corresponding path program 2 times [2024-06-27 20:11:03,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:03,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399506993] [2024-06-27 20:11:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:03,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:04,304 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 20:11:04,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:04,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399506993] [2024-06-27 20:11:04,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399506993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:04,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:04,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:04,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293450784] [2024-06-27 20:11:04,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:04,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:04,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:04,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:04,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:04,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:04,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 493 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:04,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:04,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:04,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:04,821 INFO L124 PetriNetUnfolderBase]: 2069/3139 cut-off events. [2024-06-27 20:11:04,821 INFO L125 PetriNetUnfolderBase]: For 27781/27802 co-relation queries the response was YES. [2024-06-27 20:11:04,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14477 conditions, 3139 events. 2069/3139 cut-off events. For 27781/27802 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15242 event pairs, 796 based on Foata normal form. 3/3116 useless extension candidates. Maximal degree in co-relation 14447. Up to 2951 conditions per place. [2024-06-27 20:11:04,838 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 19 changer transitions 0/102 dead transitions. [2024-06-27 20:11:04,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 102 transitions, 777 flow [2024-06-27 20:11:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:11:04,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 20:11:04,840 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 493 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:11:04,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 102 transitions, 777 flow [2024-06-27 20:11:04,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 723 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:04,850 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 533 flow [2024-06-27 20:11:04,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=533, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-06-27 20:11:04,850 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 20:11:04,851 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 533 flow [2024-06-27 20:11:04,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:04,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:04,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:04,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:11:04,851 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 20:11:04,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:04,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1118452491, now seen corresponding path program 1 times [2024-06-27 20:11:04,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:04,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525697307] [2024-06-27 20:11:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:04,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:05,485 INFO 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 20:11:05,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:05,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525697307] [2024-06-27 20:11:05,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525697307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:05,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:05,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:05,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185520766] [2024-06-27 20:11:05,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:05,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:05,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:05,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:05,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:05,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:05,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 533 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:05,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:05,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:05,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:06,077 INFO L124 PetriNetUnfolderBase]: 2172/3269 cut-off events. [2024-06-27 20:11:06,078 INFO L125 PetriNetUnfolderBase]: For 33405/33405 co-relation queries the response was YES. [2024-06-27 20:11:06,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15682 conditions, 3269 events. 2172/3269 cut-off events. For 33405/33405 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15798 event pairs, 822 based on Foata normal form. 3/3270 useless extension candidates. Maximal degree in co-relation 15651. Up to 3134 conditions per place. [2024-06-27 20:11:06,097 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 86 selfloop transitions, 22 changer transitions 0/116 dead transitions. [2024-06-27 20:11:06,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 116 transitions, 987 flow [2024-06-27 20:11:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:11:06,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-27 20:11:06,100 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 533 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:11:06,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 116 transitions, 987 flow [2024-06-27 20:11:06,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 917 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:06,112 INFO L231 Difference]: Finished difference. Result has 80 places, 91 transitions, 649 flow [2024-06-27 20:11:06,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=649, PETRI_PLACES=80, PETRI_TRANSITIONS=91} [2024-06-27 20:11:06,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-27 20:11:06,113 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 91 transitions, 649 flow [2024-06-27 20:11:06,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:06,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:06,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:06,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:11:06,115 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 20:11:06,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:06,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1188799227, now seen corresponding path program 2 times [2024-06-27 20:11:06,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:06,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835775248] [2024-06-27 20:11:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:06,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:06,766 INFO 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 20:11:06,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:06,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835775248] [2024-06-27 20:11:06,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835775248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:06,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131362771] [2024-06-27 20:11:06,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:06,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:06,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:06,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 91 transitions, 649 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:06,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:06,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:06,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:07,320 INFO L124 PetriNetUnfolderBase]: 2198/3308 cut-off events. [2024-06-27 20:11:07,320 INFO L125 PetriNetUnfolderBase]: For 40993/41006 co-relation queries the response was YES. [2024-06-27 20:11:07,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17024 conditions, 3308 events. 2198/3308 cut-off events. For 40993/41006 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16062 event pairs, 823 based on Foata normal form. 13/3318 useless extension candidates. Maximal degree in co-relation 16990. Up to 3083 conditions per place. [2024-06-27 20:11:07,340 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 42 changer transitions 0/126 dead transitions. [2024-06-27 20:11:07,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 1189 flow [2024-06-27 20:11:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 20:11:07,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-27 20:11:07,341 INFO L175 Difference]: Start difference. First operand has 80 places, 91 transitions, 649 flow. Second operand 7 states and 143 transitions. [2024-06-27 20:11:07,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 1189 flow [2024-06-27 20:11:07,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 126 transitions, 1135 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 20:11:07,358 INFO L231 Difference]: Finished difference. Result has 86 places, 103 transitions, 866 flow [2024-06-27 20:11:07,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=866, PETRI_PLACES=86, PETRI_TRANSITIONS=103} [2024-06-27 20:11:07,359 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-27 20:11:07,359 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 103 transitions, 866 flow [2024-06-27 20:11:07,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:07,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:07,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:07,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:11:07,360 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 20:11:07,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash -959118987, now seen corresponding path program 3 times [2024-06-27 20:11:07,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:07,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053035617] [2024-06-27 20:11:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:07,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:07,964 INFO 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 20:11:07,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:07,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053035617] [2024-06-27 20:11:07,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053035617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:07,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:07,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:07,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512128284] [2024-06-27 20:11:07,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:07,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:07,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:07,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:07,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:08,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:08,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 103 transitions, 866 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:08,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:08,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:08,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:08,447 INFO L124 PetriNetUnfolderBase]: 2192/3300 cut-off events. [2024-06-27 20:11:08,447 INFO L125 PetriNetUnfolderBase]: For 47482/47495 co-relation queries the response was YES. [2024-06-27 20:11:08,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18093 conditions, 3300 events. 2192/3300 cut-off events. For 47482/47495 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15994 event pairs, 823 based on Foata normal form. 13/3310 useless extension candidates. Maximal degree in co-relation 18056. Up to 3079 conditions per place. [2024-06-27 20:11:08,465 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 37 changer transitions 0/125 dead transitions. [2024-06-27 20:11:08,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 125 transitions, 1238 flow [2024-06-27 20:11:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:11:08,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-27 20:11:08,466 INFO L175 Difference]: Start difference. First operand has 86 places, 103 transitions, 866 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:11:08,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 125 transitions, 1238 flow [2024-06-27 20:11:08,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 125 transitions, 1143 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-27 20:11:08,493 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 855 flow [2024-06-27 20:11:08,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=855, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-06-27 20:11:08,494 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-27 20:11:08,494 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 855 flow [2024-06-27 20:11:08,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:08,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:08,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:08,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:11:08,494 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 20:11:08,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash -959119235, now seen corresponding path program 3 times [2024-06-27 20:11:08,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:08,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712983599] [2024-06-27 20:11:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:08,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:09,140 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 20:11:09,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:09,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712983599] [2024-06-27 20:11:09,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712983599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:09,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:09,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:09,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047949976] [2024-06-27 20:11:09,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:09,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:09,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:09,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 855 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:09,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:09,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:09,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:09,675 INFO L124 PetriNetUnfolderBase]: 2142/3236 cut-off events. [2024-06-27 20:11:09,675 INFO L125 PetriNetUnfolderBase]: For 48006/48054 co-relation queries the response was YES. [2024-06-27 20:11:09,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17475 conditions, 3236 events. 2142/3236 cut-off events. For 48006/48054 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15615 event pairs, 789 based on Foata normal form. 9/3218 useless extension candidates. Maximal degree in co-relation 17436. Up to 3003 conditions per place. [2024-06-27 20:11:09,690 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2024-06-27 20:11:09,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 125 transitions, 1175 flow [2024-06-27 20:11:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:11:09,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-27 20:11:09,692 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 855 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:11:09,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 125 transitions, 1175 flow [2024-06-27 20:11:09,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 125 transitions, 1042 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:11:09,708 INFO L231 Difference]: Finished difference. Result has 90 places, 106 transitions, 840 flow [2024-06-27 20:11:09,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=840, PETRI_PLACES=90, PETRI_TRANSITIONS=106} [2024-06-27 20:11:09,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-27 20:11:09,708 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 840 flow [2024-06-27 20:11:09,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 20:11:09,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:09,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:09,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:11:09,709 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 20:11:09,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash -958811405, now seen corresponding path program 1 times [2024-06-27 20:11:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:09,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316017940] [2024-06-27 20:11:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:09,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:10,665 INFO 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 20:11:10,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:10,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316017940] [2024-06-27 20:11:10,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316017940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:10,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:10,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:10,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805913126] [2024-06-27 20:11:10,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:10,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:10,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:10,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:10,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:11:10,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 840 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:10,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:10,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:11:10,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:11,252 INFO L124 PetriNetUnfolderBase]: 1910/3013 cut-off events. [2024-06-27 20:11:11,252 INFO L125 PetriNetUnfolderBase]: For 46575/46575 co-relation queries the response was YES. [2024-06-27 20:11:11,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16075 conditions, 3013 events. 1910/3013 cut-off events. For 46575/46575 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15343 event pairs, 672 based on Foata normal form. 6/3017 useless extension candidates. Maximal degree in co-relation 16038. Up to 2741 conditions per place. [2024-06-27 20:11:11,267 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 24 changer transitions 0/135 dead transitions. [2024-06-27 20:11:11,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 135 transitions, 1268 flow [2024-06-27 20:11:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 20:11:11,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-27 20:11:11,268 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 840 flow. Second operand 8 states and 163 transitions. [2024-06-27 20:11:11,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 135 transitions, 1268 flow [2024-06-27 20:11:11,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 1174 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:11,289 INFO L231 Difference]: Finished difference. Result has 93 places, 109 transitions, 858 flow [2024-06-27 20:11:11,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=93, PETRI_TRANSITIONS=109} [2024-06-27 20:11:11,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 20:11:11,290 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 109 transitions, 858 flow [2024-06-27 20:11:11,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:11,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:11,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:11,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:11:11,291 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:11,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1404750099, now seen corresponding path program 1 times [2024-06-27 20:11:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:11,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769657101] [2024-06-27 20:11:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:11,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:11,731 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 20:11:11,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:11,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769657101] [2024-06-27 20:11:11,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769657101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:11,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:11,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:11:11,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278810588] [2024-06-27 20:11:11,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:11,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:11:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:11,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:11:11,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:11:11,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:11:11,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 109 transitions, 858 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:11,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:11,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:11:11,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:12,224 INFO L124 PetriNetUnfolderBase]: 1908/3009 cut-off events. [2024-06-27 20:11:12,224 INFO L125 PetriNetUnfolderBase]: For 50273/50273 co-relation queries the response was YES. [2024-06-27 20:11:12,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16553 conditions, 3009 events. 1908/3009 cut-off events. For 50273/50273 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15309 event pairs, 691 based on Foata normal form. 1/3008 useless extension candidates. Maximal degree in co-relation 16515. Up to 2810 conditions per place. [2024-06-27 20:11:12,239 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 99 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2024-06-27 20:11:12,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 117 transitions, 1092 flow [2024-06-27 20:11:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:11:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:11:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-27 20:11:12,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:11:12,240 INFO L175 Difference]: Start difference. First operand has 93 places, 109 transitions, 858 flow. Second operand 5 states and 97 transitions. [2024-06-27 20:11:12,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 117 transitions, 1092 flow [2024-06-27 20:11:12,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 117 transitions, 996 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:12,261 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 784 flow [2024-06-27 20:11:12,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=784, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2024-06-27 20:11:12,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-27 20:11:12,262 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 784 flow [2024-06-27 20:11:12,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:12,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:12,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:12,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:11:12,263 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 20:11:12,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:12,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1594860028, now seen corresponding path program 1 times [2024-06-27 20:11:12,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:12,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283351808] [2024-06-27 20:11:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:12,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:12,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:12,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283351808] [2024-06-27 20:11:12,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283351808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:12,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:12,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:12,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87616167] [2024-06-27 20:11:12,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:12,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:12,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:12,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:12,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:12,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:12,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 784 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:12,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:12,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:12,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:13,577 INFO L124 PetriNetUnfolderBase]: 2155/3263 cut-off events. [2024-06-27 20:11:13,577 INFO L125 PetriNetUnfolderBase]: For 63675/63693 co-relation queries the response was YES. [2024-06-27 20:11:13,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18597 conditions, 3263 events. 2155/3263 cut-off events. For 63675/63693 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15895 event pairs, 746 based on Foata normal form. 6/3253 useless extension candidates. Maximal degree in co-relation 18558. Up to 3040 conditions per place. [2024-06-27 20:11:13,594 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 112 selfloop transitions, 17 changer transitions 0/145 dead transitions. [2024-06-27 20:11:13,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 145 transitions, 1182 flow [2024-06-27 20:11:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:11:13,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 20:11:13,595 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 784 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:11:13,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 145 transitions, 1182 flow [2024-06-27 20:11:13,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 145 transitions, 1160 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:13,616 INFO L231 Difference]: Finished difference. Result has 96 places, 112 transitions, 864 flow [2024-06-27 20:11:13,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=864, PETRI_PLACES=96, PETRI_TRANSITIONS=112} [2024-06-27 20:11:13,618 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-27 20:11:13,618 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 112 transitions, 864 flow [2024-06-27 20:11:13,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:13,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:13,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:13,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:11:13,619 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 20:11:13,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1595009758, now seen corresponding path program 2 times [2024-06-27 20:11:13,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:13,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462844128] [2024-06-27 20:11:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:13,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:14,267 INFO 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 20:11:14,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:14,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462844128] [2024-06-27 20:11:14,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462844128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:14,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:14,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:14,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211916137] [2024-06-27 20:11:14,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:14,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:14,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:14,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:14,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:14,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:14,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 112 transitions, 864 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:14,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:14,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:14,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:14,972 INFO L124 PetriNetUnfolderBase]: 2177/3300 cut-off events. [2024-06-27 20:11:14,972 INFO L125 PetriNetUnfolderBase]: For 71571/71589 co-relation queries the response was YES. [2024-06-27 20:11:14,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19553 conditions, 3300 events. 2177/3300 cut-off events. For 71571/71589 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16119 event pairs, 746 based on Foata normal form. 6/3290 useless extension candidates. Maximal degree in co-relation 19514. Up to 3045 conditions per place. [2024-06-27 20:11:14,990 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 108 selfloop transitions, 22 changer transitions 0/146 dead transitions. [2024-06-27 20:11:14,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 146 transitions, 1266 flow [2024-06-27 20:11:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:11:14,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 20:11:14,991 INFO L175 Difference]: Start difference. First operand has 96 places, 112 transitions, 864 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:11:14,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 146 transitions, 1266 flow [2024-06-27 20:11:15,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 146 transitions, 1188 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:15,016 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 904 flow [2024-06-27 20:11:15,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=904, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2024-06-27 20:11:15,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-27 20:11:15,017 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 904 flow [2024-06-27 20:11:15,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:15,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:15,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:15,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:11:15,017 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 20:11:15,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:15,018 INFO L85 PathProgramCache]: Analyzing trace with hash 306717921, now seen corresponding path program 1 times [2024-06-27 20:11:15,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:15,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733402215] [2024-06-27 20:11:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:15,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:15,665 INFO 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 20:11:15,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733402215] [2024-06-27 20:11:15,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733402215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:15,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:15,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:15,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668004752] [2024-06-27 20:11:15,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:15,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:15,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:15,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:15,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 904 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:15,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:15,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:15,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:16,363 INFO L124 PetriNetUnfolderBase]: 2377/3526 cut-off events. [2024-06-27 20:11:16,363 INFO L125 PetriNetUnfolderBase]: For 80969/80969 co-relation queries the response was YES. [2024-06-27 20:11:16,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21373 conditions, 3526 events. 2377/3526 cut-off events. For 80969/80969 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16744 event pairs, 779 based on Foata normal form. 3/3527 useless extension candidates. Maximal degree in co-relation 21333. Up to 3417 conditions per place. [2024-06-27 20:11:16,382 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 127 selfloop transitions, 27 changer transitions 0/158 dead transitions. [2024-06-27 20:11:16,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 158 transitions, 1558 flow [2024-06-27 20:11:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:11:16,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:11:16,384 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 904 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:11:16,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 158 transitions, 1558 flow [2024-06-27 20:11:16,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 158 transitions, 1464 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:16,412 INFO L231 Difference]: Finished difference. Result has 102 places, 126 transitions, 1048 flow [2024-06-27 20:11:16,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1048, PETRI_PLACES=102, PETRI_TRANSITIONS=126} [2024-06-27 20:11:16,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 20:11:16,412 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 126 transitions, 1048 flow [2024-06-27 20:11:16,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:16,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:16,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:16,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:11:16,413 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 20:11:16,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:16,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1600574165, now seen corresponding path program 2 times [2024-06-27 20:11:16,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:16,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650104544] [2024-06-27 20:11:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:16,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:17,087 INFO 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 20:11:17,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650104544] [2024-06-27 20:11:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650104544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:17,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:17,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:17,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264207631] [2024-06-27 20:11:17,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:17,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:17,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:17,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:17,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 1048 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:17,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:17,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:17,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:17,700 INFO L124 PetriNetUnfolderBase]: 2427/3597 cut-off events. [2024-06-27 20:11:17,700 INFO L125 PetriNetUnfolderBase]: For 91678/91678 co-relation queries the response was YES. [2024-06-27 20:11:17,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22910 conditions, 3597 events. 2427/3597 cut-off events. For 91678/91678 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17079 event pairs, 777 based on Foata normal form. 3/3598 useless extension candidates. Maximal degree in co-relation 22867. Up to 3402 conditions per place. [2024-06-27 20:11:17,717 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 122 selfloop transitions, 39 changer transitions 0/165 dead transitions. [2024-06-27 20:11:17,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 165 transitions, 1776 flow [2024-06-27 20:11:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:11:17,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 20:11:17,718 INFO L175 Difference]: Start difference. First operand has 102 places, 126 transitions, 1048 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:11:17,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 165 transitions, 1776 flow [2024-06-27 20:11:17,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 165 transitions, 1687 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:17,751 INFO L231 Difference]: Finished difference. Result has 108 places, 134 transitions, 1193 flow [2024-06-27 20:11:17,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=108, PETRI_TRANSITIONS=134} [2024-06-27 20:11:17,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-27 20:11:17,751 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 134 transitions, 1193 flow [2024-06-27 20:11:17,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:17,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:17,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:17,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:11:17,752 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 20:11:17,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1600573948, now seen corresponding path program 3 times [2024-06-27 20:11:17,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:17,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726961422] [2024-06-27 20:11:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:17,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:18,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:18,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726961422] [2024-06-27 20:11:18,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726961422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:18,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:18,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:18,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759924029] [2024-06-27 20:11:18,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:18,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:18,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:18,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:18,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 134 transitions, 1193 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:18,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:18,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:18,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:19,057 INFO L124 PetriNetUnfolderBase]: 2307/3480 cut-off events. [2024-06-27 20:11:19,058 INFO L125 PetriNetUnfolderBase]: For 102358/102392 co-relation queries the response was YES. [2024-06-27 20:11:19,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23390 conditions, 3480 events. 2307/3480 cut-off events. For 102358/102392 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16959 event pairs, 726 based on Foata normal form. 6/3470 useless extension candidates. Maximal degree in co-relation 23344. Up to 3166 conditions per place. [2024-06-27 20:11:19,078 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 115 selfloop transitions, 29 changer transitions 0/165 dead transitions. [2024-06-27 20:11:19,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 165 transitions, 1629 flow [2024-06-27 20:11:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:11:19,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 20:11:19,080 INFO L175 Difference]: Start difference. First operand has 108 places, 134 transitions, 1193 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:11:19,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 165 transitions, 1629 flow [2024-06-27 20:11:19,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 165 transitions, 1492 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:19,121 INFO L231 Difference]: Finished difference. Result has 111 places, 137 transitions, 1202 flow [2024-06-27 20:11:19,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1202, PETRI_PLACES=111, PETRI_TRANSITIONS=137} [2024-06-27 20:11:19,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-27 20:11:19,122 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 137 transitions, 1202 flow [2024-06-27 20:11:19,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:19,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:19,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:19,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:11:19,122 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 20:11:19,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:19,123 INFO L85 PathProgramCache]: Analyzing trace with hash 312289551, now seen corresponding path program 3 times [2024-06-27 20:11:19,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:19,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680853304] [2024-06-27 20:11:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:19,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:19,759 INFO 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 20:11:19,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680853304] [2024-06-27 20:11:19,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680853304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:19,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:19,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:19,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526808910] [2024-06-27 20:11:19,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:19,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:19,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:19,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:19,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:19,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:19,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 137 transitions, 1202 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:19,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:19,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:19,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:20,412 INFO L124 PetriNetUnfolderBase]: 2451/3637 cut-off events. [2024-06-27 20:11:20,412 INFO L125 PetriNetUnfolderBase]: For 110434/110434 co-relation queries the response was YES. [2024-06-27 20:11:20,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24395 conditions, 3637 events. 2451/3637 cut-off events. For 110434/110434 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17341 event pairs, 777 based on Foata normal form. 3/3638 useless extension candidates. Maximal degree in co-relation 24348. Up to 3439 conditions per place. [2024-06-27 20:11:20,434 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 47 changer transitions 0/169 dead transitions. [2024-06-27 20:11:20,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 169 transitions, 1769 flow [2024-06-27 20:11:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:11:20,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 20:11:20,436 INFO L175 Difference]: Start difference. First operand has 111 places, 137 transitions, 1202 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:11:20,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 169 transitions, 1769 flow [2024-06-27 20:11:20,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 169 transitions, 1647 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:20,484 INFO L231 Difference]: Finished difference. Result has 113 places, 141 transitions, 1260 flow [2024-06-27 20:11:20,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1260, PETRI_PLACES=113, PETRI_TRANSITIONS=141} [2024-06-27 20:11:20,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-27 20:11:20,485 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 141 transitions, 1260 flow [2024-06-27 20:11:20,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:20,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:20,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:20,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:11:20,485 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 20:11:20,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash 312289830, now seen corresponding path program 1 times [2024-06-27 20:11:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:20,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372225784] [2024-06-27 20:11:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:20,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:21,348 INFO 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 20:11:21,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:21,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372225784] [2024-06-27 20:11:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372225784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:21,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:21,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:21,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722839228] [2024-06-27 20:11:21,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:21,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:21,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:21,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:21,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:21,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 141 transitions, 1260 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:21,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:21,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:21,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:22,000 INFO L124 PetriNetUnfolderBase]: 2368/3562 cut-off events. [2024-06-27 20:11:22,040 INFO L125 PetriNetUnfolderBase]: For 116849/116849 co-relation queries the response was YES. [2024-06-27 20:11:22,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24104 conditions, 3562 events. 2368/3562 cut-off events. For 116849/116849 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17388 event pairs, 759 based on Foata normal form. 3/3563 useless extension candidates. Maximal degree in co-relation 24056. Up to 3344 conditions per place. [2024-06-27 20:11:22,061 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 132 selfloop transitions, 26 changer transitions 0/173 dead transitions. [2024-06-27 20:11:22,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 1814 flow [2024-06-27 20:11:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:11:22,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 20:11:22,063 INFO L175 Difference]: Start difference. First operand has 113 places, 141 transitions, 1260 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:11:22,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 1814 flow [2024-06-27 20:11:22,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 173 transitions, 1691 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:22,107 INFO L231 Difference]: Finished difference. Result has 116 places, 145 transitions, 1278 flow [2024-06-27 20:11:22,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1278, PETRI_PLACES=116, PETRI_TRANSITIONS=145} [2024-06-27 20:11:22,108 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-27 20:11:22,108 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 145 transitions, 1278 flow [2024-06-27 20:11:22,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:22,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:22,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:22,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:11:22,108 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 20:11:22,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash 513371361, now seen corresponding path program 4 times [2024-06-27 20:11:22,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:22,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988214369] [2024-06-27 20:11:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:22,782 INFO 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 20:11:22,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:22,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988214369] [2024-06-27 20:11:22,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988214369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:22,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:22,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:22,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131670774] [2024-06-27 20:11:22,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:22,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:22,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:22,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:22,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:22,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:22,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 145 transitions, 1278 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:22,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:22,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:22,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:23,442 INFO L124 PetriNetUnfolderBase]: 2487/3692 cut-off events. [2024-06-27 20:11:23,442 INFO L125 PetriNetUnfolderBase]: For 126357/126373 co-relation queries the response was YES. [2024-06-27 20:11:23,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25674 conditions, 3692 events. 2487/3692 cut-off events. For 126357/126373 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17689 event pairs, 769 based on Foata normal form. 10/3699 useless extension candidates. Maximal degree in co-relation 25625. Up to 3347 conditions per place. [2024-06-27 20:11:23,464 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 117 selfloop transitions, 61 changer transitions 0/182 dead transitions. [2024-06-27 20:11:23,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 182 transitions, 2140 flow [2024-06-27 20:11:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:11:23,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 20:11:23,466 INFO L175 Difference]: Start difference. First operand has 116 places, 145 transitions, 1278 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:11:23,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 182 transitions, 2140 flow [2024-06-27 20:11:23,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 182 transitions, 2025 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:23,524 INFO L231 Difference]: Finished difference. Result has 119 places, 153 transitions, 1458 flow [2024-06-27 20:11:23,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1458, PETRI_PLACES=119, PETRI_TRANSITIONS=153} [2024-06-27 20:11:23,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-27 20:11:23,525 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 153 transitions, 1458 flow [2024-06-27 20:11:23,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:23,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:23,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:23,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:11:23,525 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 20:11:23,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash 332075516, now seen corresponding path program 4 times [2024-06-27 20:11:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:23,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192923066] [2024-06-27 20:11:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:23,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:24,225 INFO 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 20:11:24,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:24,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192923066] [2024-06-27 20:11:24,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192923066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:24,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:24,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:24,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277124384] [2024-06-27 20:11:24,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:24,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:24,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:24,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:24,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:24,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:24,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 153 transitions, 1458 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:24,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:24,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:24,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:24,857 INFO L124 PetriNetUnfolderBase]: 2351/3553 cut-off events. [2024-06-27 20:11:24,857 INFO L125 PetriNetUnfolderBase]: For 137222/137278 co-relation queries the response was YES. [2024-06-27 20:11:24,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25872 conditions, 3553 events. 2351/3553 cut-off events. For 137222/137278 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17413 event pairs, 725 based on Foata normal form. 11/3547 useless extension candidates. Maximal degree in co-relation 25821. Up to 3176 conditions per place. [2024-06-27 20:11:24,881 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 38 changer transitions 0/181 dead transitions. [2024-06-27 20:11:24,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 181 transitions, 1924 flow [2024-06-27 20:11:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:11:24,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:11:24,882 INFO L175 Difference]: Start difference. First operand has 119 places, 153 transitions, 1458 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:11:24,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 181 transitions, 1924 flow [2024-06-27 20:11:24,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 181 transitions, 1738 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:24,946 INFO L231 Difference]: Finished difference. Result has 122 places, 156 transitions, 1450 flow [2024-06-27 20:11:24,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1450, PETRI_PLACES=122, PETRI_TRANSITIONS=156} [2024-06-27 20:11:24,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-27 20:11:24,946 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 156 transitions, 1450 flow [2024-06-27 20:11:24,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:24,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:24,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:24,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:11:24,947 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 20:11:24,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash 332083452, now seen corresponding path program 2 times [2024-06-27 20:11:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:24,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698948098] [2024-06-27 20:11:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:24,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:25,749 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 20:11:25,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:25,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698948098] [2024-06-27 20:11:25,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698948098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:25,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:25,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386264444] [2024-06-27 20:11:25,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:25,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:25,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:25,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:25,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 156 transitions, 1450 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:25,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:25,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:25,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:26,480 INFO L124 PetriNetUnfolderBase]: 2410/3630 cut-off events. [2024-06-27 20:11:26,480 INFO L125 PetriNetUnfolderBase]: For 147596/147612 co-relation queries the response was YES. [2024-06-27 20:11:26,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26363 conditions, 3630 events. 2410/3630 cut-off events. For 147596/147612 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17856 event pairs, 765 based on Foata normal form. 15/3642 useless extension candidates. Maximal degree in co-relation 26311. Up to 3314 conditions per place. [2024-06-27 20:11:26,505 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 128 selfloop transitions, 41 changer transitions 0/186 dead transitions. [2024-06-27 20:11:26,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 186 transitions, 2098 flow [2024-06-27 20:11:26,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:11:26,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:11:26,507 INFO L175 Difference]: Start difference. First operand has 122 places, 156 transitions, 1450 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:11:26,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 186 transitions, 2098 flow [2024-06-27 20:11:26,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 186 transitions, 1944 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:26,571 INFO L231 Difference]: Finished difference. Result has 124 places, 160 transitions, 1479 flow [2024-06-27 20:11:26,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1479, PETRI_PLACES=124, PETRI_TRANSITIONS=160} [2024-06-27 20:11:26,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 20:11:26,572 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 160 transitions, 1479 flow [2024-06-27 20:11:26,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:26,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:26,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:26,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:11:26,573 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 20:11:26,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:26,573 INFO L85 PathProgramCache]: Analyzing trace with hash 341279943, now seen corresponding path program 5 times [2024-06-27 20:11:26,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:26,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985315842] [2024-06-27 20:11:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:26,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:27,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:27,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985315842] [2024-06-27 20:11:27,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985315842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:27,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:27,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:27,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581607429] [2024-06-27 20:11:27,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:27,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:27,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:27,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:27,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:27,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:27,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 160 transitions, 1479 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:27,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:27,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:27,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:27,797 INFO L124 PetriNetUnfolderBase]: 2537/3769 cut-off events. [2024-06-27 20:11:27,797 INFO L125 PetriNetUnfolderBase]: For 156564/156580 co-relation queries the response was YES. [2024-06-27 20:11:27,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27982 conditions, 3769 events. 2537/3769 cut-off events. For 156564/156580 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18125 event pairs, 769 based on Foata normal form. 10/3776 useless extension candidates. Maximal degree in co-relation 27929. Up to 3410 conditions per place. [2024-06-27 20:11:27,822 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 110 selfloop transitions, 81 changer transitions 0/195 dead transitions. [2024-06-27 20:11:27,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 195 transitions, 2323 flow [2024-06-27 20:11:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:11:27,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 20:11:27,823 INFO L175 Difference]: Start difference. First operand has 124 places, 160 transitions, 1479 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:11:27,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 195 transitions, 2323 flow [2024-06-27 20:11:27,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 195 transitions, 2170 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:27,895 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 1673 flow [2024-06-27 20:11:27,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1673, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2024-06-27 20:11:27,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-27 20:11:27,896 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 1673 flow [2024-06-27 20:11:27,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:27,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:27,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:27,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:11:27,897 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 20:11:27,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash 304738600, now seen corresponding path program 3 times [2024-06-27 20:11:27,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:27,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747391138] [2024-06-27 20:11:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:28,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:28,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747391138] [2024-06-27 20:11:28,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747391138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:28,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:28,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:28,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591980825] [2024-06-27 20:11:28,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:28,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:28,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:28,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:28,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:28,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 1673 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:28,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:28,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:28,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:29,338 INFO L124 PetriNetUnfolderBase]: 2438/3670 cut-off events. [2024-06-27 20:11:29,339 INFO L125 PetriNetUnfolderBase]: For 163662/163676 co-relation queries the response was YES. [2024-06-27 20:11:29,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27648 conditions, 3670 events. 2438/3670 cut-off events. For 163662/163676 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18031 event pairs, 765 based on Foata normal form. 13/3680 useless extension candidates. Maximal degree in co-relation 27594. Up to 3296 conditions per place. [2024-06-27 20:11:29,365 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 124 selfloop transitions, 58 changer transitions 0/201 dead transitions. [2024-06-27 20:11:29,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 201 transitions, 2319 flow [2024-06-27 20:11:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:11:29,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 20:11:29,366 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 1673 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:11:29,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 201 transitions, 2319 flow [2024-06-27 20:11:29,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 201 transitions, 2230 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:29,447 INFO L231 Difference]: Finished difference. Result has 132 places, 172 transitions, 1812 flow [2024-06-27 20:11:29,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1812, PETRI_PLACES=132, PETRI_TRANSITIONS=172} [2024-06-27 20:11:29,448 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-27 20:11:29,448 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 172 transitions, 1812 flow [2024-06-27 20:11:29,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 20:11:29,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:29,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:29,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:11:29,449 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 20:11:29,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:29,449 INFO L85 PathProgramCache]: Analyzing trace with hash 332083173, now seen corresponding path program 6 times [2024-06-27 20:11:29,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:29,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103296256] [2024-06-27 20:11:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:29,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:30,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:30,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103296256] [2024-06-27 20:11:30,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103296256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:30,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:30,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:30,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434362825] [2024-06-27 20:11:30,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:30,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:30,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:30,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:30,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:30,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:30,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 172 transitions, 1812 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:30,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:30,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:30,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:30,728 INFO L124 PetriNetUnfolderBase]: 2533/3764 cut-off events. [2024-06-27 20:11:30,728 INFO L125 PetriNetUnfolderBase]: For 173043/173059 co-relation queries the response was YES. [2024-06-27 20:11:30,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29185 conditions, 3764 events. 2533/3764 cut-off events. For 173043/173059 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18145 event pairs, 769 based on Foata normal form. 10/3771 useless extension candidates. Maximal degree in co-relation 29129. Up to 3409 conditions per place. [2024-06-27 20:11:30,754 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 126 selfloop transitions, 68 changer transitions 0/198 dead transitions. [2024-06-27 20:11:30,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 198 transitions, 2444 flow [2024-06-27 20:11:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:11:30,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 20:11:30,755 INFO L175 Difference]: Start difference. First operand has 132 places, 172 transitions, 1812 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:11:30,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 198 transitions, 2444 flow [2024-06-27 20:11:30,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 198 transitions, 2196 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:30,863 INFO L231 Difference]: Finished difference. Result has 133 places, 172 transitions, 1709 flow [2024-06-27 20:11:30,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1709, PETRI_PLACES=133, PETRI_TRANSITIONS=172} [2024-06-27 20:11:30,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-27 20:11:30,863 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 172 transitions, 1709 flow [2024-06-27 20:11:30,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:30,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:30,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:30,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:11:30,864 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:30,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:30,864 INFO L85 PathProgramCache]: Analyzing trace with hash -597578827, now seen corresponding path program 1 times [2024-06-27 20:11:30,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:30,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810734281] [2024-06-27 20:11:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:30,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:31,363 INFO 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 20:11:31,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810734281] [2024-06-27 20:11:31,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810734281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:31,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:31,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:11:31,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639226733] [2024-06-27 20:11:31,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:31,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:11:31,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:31,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:11:31,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:11:31,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:11:31,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 172 transitions, 1709 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:31,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:31,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:11:31,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:32,032 INFO L124 PetriNetUnfolderBase]: 2148/3369 cut-off events. [2024-06-27 20:11:32,032 INFO L125 PetriNetUnfolderBase]: For 148112/148112 co-relation queries the response was YES. [2024-06-27 20:11:32,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25589 conditions, 3369 events. 2148/3369 cut-off events. For 148112/148112 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17174 event pairs, 635 based on Foata normal form. 2/3369 useless extension candidates. Maximal degree in co-relation 25532. Up to 3068 conditions per place. [2024-06-27 20:11:32,056 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 154 selfloop transitions, 11 changer transitions 0/185 dead transitions. [2024-06-27 20:11:32,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 185 transitions, 2095 flow [2024-06-27 20:11:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:11:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:11:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 20:11:32,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-27 20:11:32,057 INFO L175 Difference]: Start difference. First operand has 133 places, 172 transitions, 1709 flow. Second operand 6 states and 113 transitions. [2024-06-27 20:11:32,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 185 transitions, 2095 flow [2024-06-27 20:11:32,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 185 transitions, 1925 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:32,136 INFO L231 Difference]: Finished difference. Result has 133 places, 175 transitions, 1605 flow [2024-06-27 20:11:32,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1605, PETRI_PLACES=133, PETRI_TRANSITIONS=175} [2024-06-27 20:11:32,137 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-27 20:11:32,137 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 175 transitions, 1605 flow [2024-06-27 20:11:32,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:32,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:32,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:32,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:11:32,137 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 20:11:32,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:32,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2098950574, now seen corresponding path program 1 times [2024-06-27 20:11:32,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:32,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072500561] [2024-06-27 20:11:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:32,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:32,931 INFO 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 20:11:32,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:32,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072500561] [2024-06-27 20:11:32,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072500561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:32,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:32,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:32,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233391426] [2024-06-27 20:11:32,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:32,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:32,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:32,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:33,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:33,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 1605 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:33,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:33,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:33,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:33,788 INFO L124 PetriNetUnfolderBase]: 2375/3597 cut-off events. [2024-06-27 20:11:33,788 INFO L125 PetriNetUnfolderBase]: For 180916/180918 co-relation queries the response was YES. [2024-06-27 20:11:33,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28410 conditions, 3597 events. 2375/3597 cut-off events. For 180916/180918 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17763 event pairs, 683 based on Foata normal form. 4/3599 useless extension candidates. Maximal degree in co-relation 28352. Up to 3302 conditions per place. [2024-06-27 20:11:33,812 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 168 selfloop transitions, 20 changer transitions 0/217 dead transitions. [2024-06-27 20:11:33,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 217 transitions, 2181 flow [2024-06-27 20:11:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:11:33,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 20:11:33,813 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 1605 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:11:33,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 217 transitions, 2181 flow [2024-06-27 20:11:33,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 217 transitions, 2133 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:33,881 INFO L231 Difference]: Finished difference. Result has 138 places, 178 transitions, 1711 flow [2024-06-27 20:11:33,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1711, PETRI_PLACES=138, PETRI_TRANSITIONS=178} [2024-06-27 20:11:33,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-27 20:11:33,882 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 178 transitions, 1711 flow [2024-06-27 20:11:33,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:33,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:33,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:33,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:11:33,882 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 20:11:33,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1193487430, now seen corresponding path program 1 times [2024-06-27 20:11:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:33,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222741442] [2024-06-27 20:11:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:34,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:34,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222741442] [2024-06-27 20:11:34,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222741442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:34,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:34,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:34,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993229491] [2024-06-27 20:11:34,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:34,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:34,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:34,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:34,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:34,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 178 transitions, 1711 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:34,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:34,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:34,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:35,385 INFO L124 PetriNetUnfolderBase]: 2587/3840 cut-off events. [2024-06-27 20:11:35,386 INFO L125 PetriNetUnfolderBase]: For 199931/199931 co-relation queries the response was YES. [2024-06-27 20:11:35,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30798 conditions, 3840 events. 2587/3840 cut-off events. For 199931/199931 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18544 event pairs, 708 based on Foata normal form. 6/3844 useless extension candidates. Maximal degree in co-relation 30739. Up to 3653 conditions per place. [2024-06-27 20:11:35,412 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 195 selfloop transitions, 32 changer transitions 0/231 dead transitions. [2024-06-27 20:11:35,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 231 transitions, 2751 flow [2024-06-27 20:11:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:11:35,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 20:11:35,413 INFO L175 Difference]: Start difference. First operand has 138 places, 178 transitions, 1711 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:11:35,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 231 transitions, 2751 flow [2024-06-27 20:11:35,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 231 transitions, 2621 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:35,484 INFO L231 Difference]: Finished difference. Result has 142 places, 189 transitions, 1899 flow [2024-06-27 20:11:35,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1899, PETRI_PLACES=142, PETRI_TRANSITIONS=189} [2024-06-27 20:11:35,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-27 20:11:35,484 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 189 transitions, 1899 flow [2024-06-27 20:11:35,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:35,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:35,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:35,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:11:35,485 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 20:11:35,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:35,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2094297350, now seen corresponding path program 1 times [2024-06-27 20:11:35,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:35,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941001354] [2024-06-27 20:11:35,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:35,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:36,235 INFO 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 20:11:36,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:36,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941001354] [2024-06-27 20:11:36,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941001354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:36,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:36,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:36,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192214636] [2024-06-27 20:11:36,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:36,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:36,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:36,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:36,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:36,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 189 transitions, 1899 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:36,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:36,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:36,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:37,032 INFO L124 PetriNetUnfolderBase]: 2605/3869 cut-off events. [2024-06-27 20:11:37,033 INFO L125 PetriNetUnfolderBase]: For 215819/215819 co-relation queries the response was YES. [2024-06-27 20:11:37,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32202 conditions, 3869 events. 2605/3869 cut-off events. For 215819/215819 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18787 event pairs, 696 based on Foata normal form. 3/3870 useless extension candidates. Maximal degree in co-relation 32140. Up to 3732 conditions per place. [2024-06-27 20:11:37,067 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 194 selfloop transitions, 31 changer transitions 0/229 dead transitions. [2024-06-27 20:11:37,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 229 transitions, 2747 flow [2024-06-27 20:11:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:11:37,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 20:11:37,068 INFO L175 Difference]: Start difference. First operand has 142 places, 189 transitions, 1899 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:11:37,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 229 transitions, 2747 flow [2024-06-27 20:11:37,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 229 transitions, 2599 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:37,195 INFO L231 Difference]: Finished difference. Result has 147 places, 193 transitions, 1934 flow [2024-06-27 20:11:37,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1934, PETRI_PLACES=147, PETRI_TRANSITIONS=193} [2024-06-27 20:11:37,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-27 20:11:37,196 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 193 transitions, 1934 flow [2024-06-27 20:11:37,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:37,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:37,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:37,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:11:37,196 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 20:11:37,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash 918321688, now seen corresponding path program 2 times [2024-06-27 20:11:37,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:37,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264795056] [2024-06-27 20:11:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:37,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:37,885 INFO 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 20:11:37,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:37,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264795056] [2024-06-27 20:11:37,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264795056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:37,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:37,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:37,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841190840] [2024-06-27 20:11:37,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:37,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:37,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:37,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:37,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:38,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:38,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 193 transitions, 1934 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:38,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:38,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:38,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:38,707 INFO L124 PetriNetUnfolderBase]: 2721/4040 cut-off events. [2024-06-27 20:11:38,707 INFO L125 PetriNetUnfolderBase]: For 236887/236887 co-relation queries the response was YES. [2024-06-27 20:11:38,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34259 conditions, 4040 events. 2721/4040 cut-off events. For 236887/236887 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19753 event pairs, 689 based on Foata normal form. 6/4044 useless extension candidates. Maximal degree in co-relation 34195. Up to 3690 conditions per place. [2024-06-27 20:11:38,741 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 190 selfloop transitions, 52 changer transitions 0/246 dead transitions. [2024-06-27 20:11:38,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 246 transitions, 3176 flow [2024-06-27 20:11:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:11:38,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 20:11:38,742 INFO L175 Difference]: Start difference. First operand has 147 places, 193 transitions, 1934 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:11:38,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 246 transitions, 3176 flow [2024-06-27 20:11:38,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 246 transitions, 3023 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:38,853 INFO L231 Difference]: Finished difference. Result has 150 places, 205 transitions, 2234 flow [2024-06-27 20:11:38,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2234, PETRI_PLACES=150, PETRI_TRANSITIONS=205} [2024-06-27 20:11:38,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-27 20:11:38,854 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 205 transitions, 2234 flow [2024-06-27 20:11:38,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:38,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:38,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:38,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:11:38,854 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 20:11:38,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:38,854 INFO L85 PathProgramCache]: Analyzing trace with hash 918315178, now seen corresponding path program 3 times [2024-06-27 20:11:38,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:38,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302068210] [2024-06-27 20:11:38,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:38,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:39,535 INFO 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 20:11:39,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:39,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302068210] [2024-06-27 20:11:39,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302068210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:39,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:39,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:39,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640305735] [2024-06-27 20:11:39,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:39,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:39,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:39,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:39,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:39,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 205 transitions, 2234 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:39,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:39,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:39,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:40,366 INFO L124 PetriNetUnfolderBase]: 2709/4020 cut-off events. [2024-06-27 20:11:40,366 INFO L125 PetriNetUnfolderBase]: For 248248/248248 co-relation queries the response was YES. [2024-06-27 20:11:40,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34971 conditions, 4020 events. 2709/4020 cut-off events. For 248248/248248 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19573 event pairs, 699 based on Foata normal form. 6/4024 useless extension candidates. Maximal degree in co-relation 34905. Up to 3684 conditions per place. [2024-06-27 20:11:40,400 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 194 selfloop transitions, 47 changer transitions 0/245 dead transitions. [2024-06-27 20:11:40,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 245 transitions, 3108 flow [2024-06-27 20:11:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:11:40,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:11:40,402 INFO L175 Difference]: Start difference. First operand has 150 places, 205 transitions, 2234 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:11:40,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 245 transitions, 3108 flow [2024-06-27 20:11:40,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 245 transitions, 2867 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:40,631 INFO L231 Difference]: Finished difference. Result has 155 places, 205 transitions, 2097 flow [2024-06-27 20:11:40,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2097, PETRI_PLACES=155, PETRI_TRANSITIONS=205} [2024-06-27 20:11:40,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-27 20:11:40,632 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 205 transitions, 2097 flow [2024-06-27 20:11:40,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:40,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:40,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:40,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:11:40,632 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 20:11:40,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:40,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1200162598, now seen corresponding path program 1 times [2024-06-27 20:11:40,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:40,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663712859] [2024-06-27 20:11:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:40,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:41,546 INFO 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 20:11:41,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663712859] [2024-06-27 20:11:41,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663712859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:41,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:41,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:41,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863500788] [2024-06-27 20:11:41,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:41,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:41,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:41,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:41,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:41,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:41,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 205 transitions, 2097 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:41,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:41,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:41,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:42,448 INFO L124 PetriNetUnfolderBase]: 2634/3961 cut-off events. [2024-06-27 20:11:42,448 INFO L125 PetriNetUnfolderBase]: For 252972/252972 co-relation queries the response was YES. [2024-06-27 20:11:42,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33915 conditions, 3961 events. 2634/3961 cut-off events. For 252972/252972 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19802 event pairs, 707 based on Foata normal form. 6/3965 useless extension candidates. Maximal degree in co-relation 33847. Up to 3672 conditions per place. [2024-06-27 20:11:42,482 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 192 selfloop transitions, 29 changer transitions 0/241 dead transitions. [2024-06-27 20:11:42,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 241 transitions, 2873 flow [2024-06-27 20:11:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:11:42,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 20:11:42,483 INFO L175 Difference]: Start difference. First operand has 155 places, 205 transitions, 2097 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:11:42,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 241 transitions, 2873 flow [2024-06-27 20:11:42,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 241 transitions, 2712 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-27 20:11:42,605 INFO L231 Difference]: Finished difference. Result has 154 places, 208 transitions, 2112 flow [2024-06-27 20:11:42,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2112, PETRI_PLACES=154, PETRI_TRANSITIONS=208} [2024-06-27 20:11:42,605 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-27 20:11:42,605 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 208 transitions, 2112 flow [2024-06-27 20:11:42,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:42,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:42,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:42,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:11:42,606 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 20:11:42,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1951895396, now seen corresponding path program 2 times [2024-06-27 20:11:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:42,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875912734] [2024-06-27 20:11:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:42,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:43,424 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 20:11:43,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:43,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875912734] [2024-06-27 20:11:43,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875912734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:43,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:43,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891692650] [2024-06-27 20:11:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:43,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:43,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:43,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:43,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:43,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 208 transitions, 2112 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:43,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:43,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:43,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:44,299 INFO L124 PetriNetUnfolderBase]: 2779/4124 cut-off events. [2024-06-27 20:11:44,299 INFO L125 PetriNetUnfolderBase]: For 267718/267718 co-relation queries the response was YES. [2024-06-27 20:11:44,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35565 conditions, 4124 events. 2779/4124 cut-off events. For 267718/267718 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20178 event pairs, 702 based on Foata normal form. 3/4125 useless extension candidates. Maximal degree in co-relation 35499. Up to 3850 conditions per place. [2024-06-27 20:11:44,333 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 184 selfloop transitions, 62 changer transitions 0/250 dead transitions. [2024-06-27 20:11:44,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 250 transitions, 3224 flow [2024-06-27 20:11:44,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:11:44,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 20:11:44,335 INFO L175 Difference]: Start difference. First operand has 154 places, 208 transitions, 2112 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:11:44,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 250 transitions, 3224 flow [2024-06-27 20:11:44,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 250 transitions, 3072 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:44,480 INFO L231 Difference]: Finished difference. Result has 156 places, 216 transitions, 2337 flow [2024-06-27 20:11:44,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2337, PETRI_PLACES=156, PETRI_TRANSITIONS=216} [2024-06-27 20:11:44,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-27 20:11:44,481 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 216 transitions, 2337 flow [2024-06-27 20:11:44,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:44,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:44,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:44,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:11:44,481 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 20:11:44,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:44,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1091042218, now seen corresponding path program 4 times [2024-06-27 20:11:44,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:44,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832973301] [2024-06-27 20:11:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:44,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:45,197 INFO 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 20:11:45,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:45,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832973301] [2024-06-27 20:11:45,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832973301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:45,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:45,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119726203] [2024-06-27 20:11:45,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:45,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:45,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:45,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 216 transitions, 2337 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:45,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:45,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:45,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:46,003 INFO L124 PetriNetUnfolderBase]: 2895/4300 cut-off events. [2024-06-27 20:11:46,003 INFO L125 PetriNetUnfolderBase]: For 295766/295766 co-relation queries the response was YES. [2024-06-27 20:11:46,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38017 conditions, 4300 events. 2895/4300 cut-off events. For 295766/295766 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21260 event pairs, 681 based on Foata normal form. 6/4304 useless extension candidates. Maximal degree in co-relation 37950. Up to 3740 conditions per place. [2024-06-27 20:11:46,038 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 179 selfloop transitions, 82 changer transitions 0/265 dead transitions. [2024-06-27 20:11:46,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 265 transitions, 3591 flow [2024-06-27 20:11:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:11:46,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:11:46,039 INFO L175 Difference]: Start difference. First operand has 156 places, 216 transitions, 2337 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:11:46,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 265 transitions, 3591 flow [2024-06-27 20:11:46,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 265 transitions, 3402 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:46,199 INFO L231 Difference]: Finished difference. Result has 161 places, 228 transitions, 2704 flow [2024-06-27 20:11:46,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2704, PETRI_PLACES=161, PETRI_TRANSITIONS=228} [2024-06-27 20:11:46,200 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-27 20:11:46,200 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 228 transitions, 2704 flow [2024-06-27 20:11:46,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:46,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:46,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:46,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:11:46,200 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 20:11:46,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1384200070, now seen corresponding path program 3 times [2024-06-27 20:11:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:46,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852652785] [2024-06-27 20:11:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:46,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:47,028 INFO 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 20:11:47,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:47,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852652785] [2024-06-27 20:11:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852652785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:47,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:47,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423511732] [2024-06-27 20:11:47,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:47,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:47,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:47,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 228 transitions, 2704 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:47,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:47,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:47,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:47,867 INFO L124 PetriNetUnfolderBase]: 2913/4332 cut-off events. [2024-06-27 20:11:47,868 INFO L125 PetriNetUnfolderBase]: For 310508/310508 co-relation queries the response was YES. [2024-06-27 20:11:47,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39599 conditions, 4332 events. 2913/4332 cut-off events. For 310508/310508 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21515 event pairs, 715 based on Foata normal form. 3/4333 useless extension candidates. Maximal degree in co-relation 39529. Up to 4090 conditions per place. [2024-06-27 20:11:47,908 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 209 selfloop transitions, 51 changer transitions 0/264 dead transitions. [2024-06-27 20:11:47,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 264 transitions, 3574 flow [2024-06-27 20:11:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:11:47,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:11:47,909 INFO L175 Difference]: Start difference. First operand has 161 places, 228 transitions, 2704 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:11:47,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 264 transitions, 3574 flow [2024-06-27 20:11:48,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 264 transitions, 3414 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:48,163 INFO L231 Difference]: Finished difference. Result has 166 places, 232 transitions, 2773 flow [2024-06-27 20:11:48,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2773, PETRI_PLACES=166, PETRI_TRANSITIONS=232} [2024-06-27 20:11:48,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-27 20:11:48,168 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 232 transitions, 2773 flow [2024-06-27 20:11:48,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:48,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:48,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:48,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:11:48,169 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 20:11:48,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:48,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1090811826, now seen corresponding path program 4 times [2024-06-27 20:11:48,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:48,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507385251] [2024-06-27 20:11:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:48,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:49,017 INFO 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 20:11:49,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:49,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507385251] [2024-06-27 20:11:49,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507385251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:49,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:49,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:49,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008878977] [2024-06-27 20:11:49,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:49,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:49,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:49,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:49,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:49,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:49,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 232 transitions, 2773 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:49,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:49,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:49,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:49,811 INFO L124 PetriNetUnfolderBase]: 2907/4319 cut-off events. [2024-06-27 20:11:49,811 INFO L125 PetriNetUnfolderBase]: For 313641/313641 co-relation queries the response was YES. [2024-06-27 20:11:49,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39024 conditions, 4319 events. 2907/4319 cut-off events. For 313641/313641 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21408 event pairs, 720 based on Foata normal form. 3/4320 useless extension candidates. Maximal degree in co-relation 38952. Up to 4082 conditions per place. [2024-06-27 20:11:49,846 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 215 selfloop transitions, 46 changer transitions 0/265 dead transitions. [2024-06-27 20:11:49,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 265 transitions, 3623 flow [2024-06-27 20:11:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:11:49,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 20:11:49,848 INFO L175 Difference]: Start difference. First operand has 166 places, 232 transitions, 2773 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:11:49,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 265 transitions, 3623 flow [2024-06-27 20:11:50,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 265 transitions, 3376 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:50,126 INFO L231 Difference]: Finished difference. Result has 169 places, 232 transitions, 2627 flow [2024-06-27 20:11:50,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2627, PETRI_PLACES=169, PETRI_TRANSITIONS=232} [2024-06-27 20:11:50,126 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-27 20:11:50,126 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 232 transitions, 2627 flow [2024-06-27 20:11:50,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:50,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:50,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:11:50,127 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 20:11:50,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1921814218, now seen corresponding path program 5 times [2024-06-27 20:11:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:50,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456855080] [2024-06-27 20:11:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:50,842 INFO 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 20:11:50,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:50,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456855080] [2024-06-27 20:11:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456855080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:50,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:50,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:50,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92746511] [2024-06-27 20:11:50,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:50,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:50,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:50,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:50,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:50,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:50,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 232 transitions, 2627 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:50,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:50,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:50,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:51,761 INFO L124 PetriNetUnfolderBase]: 2943/4379 cut-off events. [2024-06-27 20:11:51,761 INFO L125 PetriNetUnfolderBase]: For 329533/329533 co-relation queries the response was YES. [2024-06-27 20:11:51,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39561 conditions, 4379 events. 2943/4379 cut-off events. For 329533/329533 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21787 event pairs, 703 based on Foata normal form. 6/4383 useless extension candidates. Maximal degree in co-relation 39488. Up to 3788 conditions per place. [2024-06-27 20:11:51,795 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 198 selfloop transitions, 72 changer transitions 0/274 dead transitions. [2024-06-27 20:11:51,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 274 transitions, 3808 flow [2024-06-27 20:11:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:11:51,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 20:11:51,796 INFO L175 Difference]: Start difference. First operand has 169 places, 232 transitions, 2627 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:11:51,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 274 transitions, 3808 flow [2024-06-27 20:11:51,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 274 transitions, 3679 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 20:11:51,994 INFO L231 Difference]: Finished difference. Result has 170 places, 236 transitions, 2781 flow [2024-06-27 20:11:51,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2781, PETRI_PLACES=170, PETRI_TRANSITIONS=236} [2024-06-27 20:11:51,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-27 20:11:51,994 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 236 transitions, 2781 flow [2024-06-27 20:11:51,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:51,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:51,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:51,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:11:51,995 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 20:11:51,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1090811578, now seen corresponding path program 6 times [2024-06-27 20:11:51,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:51,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712873217] [2024-06-27 20:11:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:51,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:52,724 INFO 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 20:11:52,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:52,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712873217] [2024-06-27 20:11:52,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712873217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:52,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:52,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:52,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84548691] [2024-06-27 20:11:52,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:52,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:52,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:52,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:52,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:52,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:52,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 236 transitions, 2781 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:52,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:52,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:52,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:53,589 INFO L124 PetriNetUnfolderBase]: 2931/4363 cut-off events. [2024-06-27 20:11:53,589 INFO L125 PetriNetUnfolderBase]: For 338808/338808 co-relation queries the response was YES. [2024-06-27 20:11:53,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39697 conditions, 4363 events. 2931/4363 cut-off events. For 338808/338808 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21679 event pairs, 701 based on Foata normal form. 6/4367 useless extension candidates. Maximal degree in co-relation 39623. Up to 3782 conditions per place. [2024-06-27 20:11:53,623 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 196 selfloop transitions, 73 changer transitions 0/273 dead transitions. [2024-06-27 20:11:53,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 273 transitions, 3675 flow [2024-06-27 20:11:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:11:53,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 20:11:53,624 INFO L175 Difference]: Start difference. First operand has 170 places, 236 transitions, 2781 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:11:53,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 273 transitions, 3675 flow [2024-06-27 20:11:53,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 273 transitions, 3328 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:53,852 INFO L231 Difference]: Finished difference. Result has 172 places, 236 transitions, 2589 flow [2024-06-27 20:11:53,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2589, PETRI_PLACES=172, PETRI_TRANSITIONS=236} [2024-06-27 20:11:53,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-27 20:11:53,853 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 236 transitions, 2589 flow [2024-06-27 20:11:53,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:53,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:53,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:53,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:11:53,854 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:53,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:53,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1378602492, now seen corresponding path program 1 times [2024-06-27 20:11:53,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:53,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430751366] [2024-06-27 20:11:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:53,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:54,348 INFO 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 20:11:54,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:54,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430751366] [2024-06-27 20:11:54,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430751366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:54,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:54,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:11:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583806417] [2024-06-27 20:11:54,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:54,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:11:54,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:54,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:11:54,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:11:54,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:11:54,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 236 transitions, 2589 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 20:11:54,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:54,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:11:54,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:55,192 INFO L124 PetriNetUnfolderBase]: 2823/4257 cut-off events. [2024-06-27 20:11:55,192 INFO L125 PetriNetUnfolderBase]: For 340362/340362 co-relation queries the response was YES. [2024-06-27 20:11:55,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38554 conditions, 4257 events. 2823/4257 cut-off events. For 340362/340362 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21676 event pairs, 729 based on Foata normal form. 1/4256 useless extension candidates. Maximal degree in co-relation 38480. Up to 3994 conditions per place. [2024-06-27 20:11:55,229 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 216 selfloop transitions, 16 changer transitions 0/255 dead transitions. [2024-06-27 20:11:55,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 255 transitions, 3233 flow [2024-06-27 20:11:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:11:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:11:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:11:55,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 20:11:55,230 INFO L175 Difference]: Start difference. First operand has 172 places, 236 transitions, 2589 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:11:55,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 255 transitions, 3233 flow [2024-06-27 20:11:55,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 255 transitions, 2993 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 20:11:55,421 INFO L231 Difference]: Finished difference. Result has 170 places, 239 transitions, 2439 flow [2024-06-27 20:11:55,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2439, PETRI_PLACES=170, PETRI_TRANSITIONS=239} [2024-06-27 20:11:55,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-27 20:11:55,422 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 239 transitions, 2439 flow [2024-06-27 20:11:55,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 20:11:55,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:55,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:55,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:11:55,423 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 20:11:55,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:55,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1704644748, now seen corresponding path program 5 times [2024-06-27 20:11:55,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:55,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6875514] [2024-06-27 20:11:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:55,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:56,321 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 20:11:56,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:56,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6875514] [2024-06-27 20:11:56,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6875514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:56,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:56,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:56,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010079054] [2024-06-27 20:11:56,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:56,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:56,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:56,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:56,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 239 transitions, 2439 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:56,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:56,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:56,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:57,206 INFO L124 PetriNetUnfolderBase]: 2954/4399 cut-off events. [2024-06-27 20:11:57,206 INFO L125 PetriNetUnfolderBase]: For 353259/353273 co-relation queries the response was YES. [2024-06-27 20:11:57,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39255 conditions, 4399 events. 2954/4399 cut-off events. For 353259/353273 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21923 event pairs, 711 based on Foata normal form. 8/4404 useless extension candidates. Maximal degree in co-relation 39181. Up to 3997 conditions per place. [2024-06-27 20:11:57,243 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 195 selfloop transitions, 74 changer transitions 0/273 dead transitions. [2024-06-27 20:11:57,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 273 transitions, 3447 flow [2024-06-27 20:11:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:11:57,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 20:11:57,244 INFO L175 Difference]: Start difference. First operand has 170 places, 239 transitions, 2439 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:11:57,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 273 transitions, 3447 flow [2024-06-27 20:11:57,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 273 transitions, 3397 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:57,433 INFO L231 Difference]: Finished difference. Result has 175 places, 243 transitions, 2680 flow [2024-06-27 20:11:57,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2680, PETRI_PLACES=175, PETRI_TRANSITIONS=243} [2024-06-27 20:11:57,433 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-27 20:11:57,433 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 243 transitions, 2680 flow [2024-06-27 20:11:57,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:57,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:57,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:57,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:11:57,434 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 20:11:57,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:57,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1704644500, now seen corresponding path program 7 times [2024-06-27 20:11:57,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:57,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333995302] [2024-06-27 20:11:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:57,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333995302] [2024-06-27 20:11:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333995302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:58,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:58,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:58,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664749053] [2024-06-27 20:11:58,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:58,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:58,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:58,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:58,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:58,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 243 transitions, 2680 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:58,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:58,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:58,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:59,036 INFO L124 PetriNetUnfolderBase]: 3070/4585 cut-off events. [2024-06-27 20:11:59,036 INFO L125 PetriNetUnfolderBase]: For 389841/389855 co-relation queries the response was YES. [2024-06-27 20:11:59,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42284 conditions, 4585 events. 3070/4585 cut-off events. For 389841/389855 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 23149 event pairs, 711 based on Foata normal form. 11/4593 useless extension candidates. Maximal degree in co-relation 42209. Up to 3665 conditions per place. [2024-06-27 20:11:59,074 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 183 selfloop transitions, 106 changer transitions 0/293 dead transitions. [2024-06-27 20:11:59,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 293 transitions, 4304 flow [2024-06-27 20:11:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 20:11:59,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 20:11:59,076 INFO L175 Difference]: Start difference. First operand has 175 places, 243 transitions, 2680 flow. Second operand 9 states and 185 transitions. [2024-06-27 20:11:59,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 293 transitions, 4304 flow [2024-06-27 20:11:59,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 293 transitions, 4043 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:59,439 INFO L231 Difference]: Finished difference. Result has 179 places, 255 transitions, 3033 flow [2024-06-27 20:11:59,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3033, PETRI_PLACES=179, PETRI_TRANSITIONS=255} [2024-06-27 20:11:59,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-27 20:11:59,440 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 255 transitions, 3033 flow [2024-06-27 20:11:59,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:59,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:59,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:59,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:11:59,441 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 20:11:59,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653428, now seen corresponding path program 2 times [2024-06-27 20:11:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:59,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614029253] [2024-06-27 20:11:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:00,371 INFO 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 20:12:00,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:00,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614029253] [2024-06-27 20:12:00,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614029253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:00,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:00,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:00,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156618109] [2024-06-27 20:12:00,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:00,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:00,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:00,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:00,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:12:00,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 255 transitions, 3033 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:00,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:00,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:12:00,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:01,305 INFO L124 PetriNetUnfolderBase]: 2976/4503 cut-off events. [2024-06-27 20:12:01,305 INFO L125 PetriNetUnfolderBase]: For 411242/411256 co-relation queries the response was YES. [2024-06-27 20:12:01,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43005 conditions, 4503 events. 2976/4503 cut-off events. For 411242/411256 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23258 event pairs, 732 based on Foata normal form. 16/4516 useless extension candidates. Maximal degree in co-relation 42927. Up to 4055 conditions per place. [2024-06-27 20:12:01,347 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 218 selfloop transitions, 47 changer transitions 0/289 dead transitions. [2024-06-27 20:12:01,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 289 transitions, 4045 flow [2024-06-27 20:12:01,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:12:01,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 20:12:01,349 INFO L175 Difference]: Start difference. First operand has 179 places, 255 transitions, 3033 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:12:01,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 289 transitions, 4045 flow [2024-06-27 20:12:01,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 289 transitions, 3819 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:01,622 INFO L231 Difference]: Finished difference. Result has 184 places, 258 transitions, 3039 flow [2024-06-27 20:12:01,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3039, PETRI_PLACES=184, PETRI_TRANSITIONS=258} [2024-06-27 20:12:01,623 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-27 20:12:01,623 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 258 transitions, 3039 flow [2024-06-27 20:12:01,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:01,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:01,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:01,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:12:01,623 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 20:12:01,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:01,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653118, now seen corresponding path program 6 times [2024-06-27 20:12:01,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:01,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960411775] [2024-06-27 20:12:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:01,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:02,464 INFO 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 20:12:02,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:02,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960411775] [2024-06-27 20:12:02,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960411775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:02,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:02,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:02,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518034357] [2024-06-27 20:12:02,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:02,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:02,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:02,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:02,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:02,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 258 transitions, 3039 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:02,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:02,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:02,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:03,371 INFO L124 PetriNetUnfolderBase]: 3140/4686 cut-off events. [2024-06-27 20:12:03,371 INFO L125 PetriNetUnfolderBase]: For 430244/430258 co-relation queries the response was YES. [2024-06-27 20:12:03,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45216 conditions, 4686 events. 3140/4686 cut-off events. For 430244/430258 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23690 event pairs, 725 based on Foata normal form. 8/4691 useless extension candidates. Maximal degree in co-relation 45136. Up to 4224 conditions per place. [2024-06-27 20:12:03,419 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 209 selfloop transitions, 85 changer transitions 0/298 dead transitions. [2024-06-27 20:12:03,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 298 transitions, 4467 flow [2024-06-27 20:12:03,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:12:03,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 20:12:03,420 INFO L175 Difference]: Start difference. First operand has 184 places, 258 transitions, 3039 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:12:03,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 298 transitions, 4467 flow [2024-06-27 20:12:03,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 298 transitions, 4259 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:03,702 INFO L231 Difference]: Finished difference. Result has 186 places, 266 transitions, 3306 flow [2024-06-27 20:12:03,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3306, PETRI_PLACES=186, PETRI_TRANSITIONS=266} [2024-06-27 20:12:03,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-27 20:12:03,702 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 266 transitions, 3306 flow [2024-06-27 20:12:03,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:03,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:03,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:03,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:12:03,703 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:03,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1704413860, now seen corresponding path program 8 times [2024-06-27 20:12:03,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:03,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566947025] [2024-06-27 20:12:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:03,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:04,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:04,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566947025] [2024-06-27 20:12:04,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566947025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:04,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:04,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:04,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310915951] [2024-06-27 20:12:04,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:04,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:04,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:04,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:04,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:04,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:04,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 266 transitions, 3306 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:04,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:04,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:04,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:05,319 INFO L124 PetriNetUnfolderBase]: 3176/4742 cut-off events. [2024-06-27 20:12:05,319 INFO L125 PetriNetUnfolderBase]: For 449109/449123 co-relation queries the response was YES. [2024-06-27 20:12:05,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46305 conditions, 4742 events. 3176/4742 cut-off events. For 449109/449123 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 24064 event pairs, 713 based on Foata normal form. 11/4750 useless extension candidates. Maximal degree in co-relation 46224. Up to 3799 conditions per place. [2024-06-27 20:12:05,363 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 197 selfloop transitions, 108 changer transitions 0/309 dead transitions. [2024-06-27 20:12:05,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 309 transitions, 4891 flow [2024-06-27 20:12:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 20:12:05,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 20:12:05,365 INFO L175 Difference]: Start difference. First operand has 186 places, 266 transitions, 3306 flow. Second operand 9 states and 185 transitions. [2024-06-27 20:12:05,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 309 transitions, 4891 flow [2024-06-27 20:12:05,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 309 transitions, 4640 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:05,815 INFO L231 Difference]: Finished difference. Result has 190 places, 270 transitions, 3403 flow [2024-06-27 20:12:05,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3403, PETRI_PLACES=190, PETRI_TRANSITIONS=270} [2024-06-27 20:12:05,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-27 20:12:05,815 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 270 transitions, 3403 flow [2024-06-27 20:12:05,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:05,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:05,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:05,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:12:05,816 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 20:12:05,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash 25562874, now seen corresponding path program 7 times [2024-06-27 20:12:05,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:05,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973226285] [2024-06-27 20:12:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:05,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:06,633 INFO 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 20:12:06,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:06,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973226285] [2024-06-27 20:12:06,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973226285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:06,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:06,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:06,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568429062] [2024-06-27 20:12:06,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:06,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:06,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:06,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:06,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 270 transitions, 3403 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:06,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:06,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:06,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:07,717 INFO L124 PetriNetUnfolderBase]: 3178/4744 cut-off events. [2024-06-27 20:12:07,718 INFO L125 PetriNetUnfolderBase]: For 457354/457368 co-relation queries the response was YES. [2024-06-27 20:12:07,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46954 conditions, 4744 events. 3178/4744 cut-off events. For 457354/457368 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 24064 event pairs, 732 based on Foata normal form. 8/4749 useless extension candidates. Maximal degree in co-relation 46871. Up to 4159 conditions per place. [2024-06-27 20:12:07,764 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 180 selfloop transitions, 129 changer transitions 0/313 dead transitions. [2024-06-27 20:12:07,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 313 transitions, 4663 flow [2024-06-27 20:12:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 20:12:07,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-27 20:12:07,765 INFO L175 Difference]: Start difference. First operand has 190 places, 270 transitions, 3403 flow. Second operand 11 states and 210 transitions. [2024-06-27 20:12:07,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 313 transitions, 4663 flow [2024-06-27 20:12:08,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 313 transitions, 4357 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:08,179 INFO L231 Difference]: Finished difference. Result has 195 places, 274 transitions, 3525 flow [2024-06-27 20:12:08,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3525, PETRI_PLACES=195, PETRI_TRANSITIONS=274} [2024-06-27 20:12:08,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-27 20:12:08,179 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 274 transitions, 3525 flow [2024-06-27 20:12:08,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:08,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:08,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:08,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:12:08,180 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 20:12:08,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1999872628, now seen corresponding path program 3 times [2024-06-27 20:12:08,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:08,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064455445] [2024-06-27 20:12:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:08,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:09,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:09,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064455445] [2024-06-27 20:12:09,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064455445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:09,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:09,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:09,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310319543] [2024-06-27 20:12:09,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:09,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:09,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:09,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:09,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:09,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:12:09,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 274 transitions, 3525 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:09,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:09,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:12:09,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:10,159 INFO L124 PetriNetUnfolderBase]: 3083/4664 cut-off events. [2024-06-27 20:12:10,159 INFO L125 PetriNetUnfolderBase]: For 474547/474561 co-relation queries the response was YES. [2024-06-27 20:12:10,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46629 conditions, 4664 events. 3083/4664 cut-off events. For 474547/474561 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24199 event pairs, 745 based on Foata normal form. 16/4677 useless extension candidates. Maximal degree in co-relation 46545. Up to 4147 conditions per place. [2024-06-27 20:12:10,206 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 220 selfloop transitions, 64 changer transitions 0/311 dead transitions. [2024-06-27 20:12:10,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 311 transitions, 4519 flow [2024-06-27 20:12:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:10,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:12:10,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 20:12:10,207 INFO L175 Difference]: Start difference. First operand has 195 places, 274 transitions, 3525 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:12:10,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 311 transitions, 4519 flow [2024-06-27 20:12:10,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 311 transitions, 4123 flow, removed 72 selfloop flow, removed 9 redundant places. [2024-06-27 20:12:10,697 INFO L231 Difference]: Finished difference. Result has 196 places, 277 transitions, 3409 flow [2024-06-27 20:12:10,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3129, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3409, PETRI_PLACES=196, PETRI_TRANSITIONS=277} [2024-06-27 20:12:10,697 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-27 20:12:10,697 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 277 transitions, 3409 flow [2024-06-27 20:12:10,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:10,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:10,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:10,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:12:10,698 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 20:12:10,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:10,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2000228818, now seen corresponding path program 4 times [2024-06-27 20:12:10,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:10,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482533376] [2024-06-27 20:12:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:10,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:11,622 INFO 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 20:12:11,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:11,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482533376] [2024-06-27 20:12:11,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482533376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:11,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:11,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:11,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031872374] [2024-06-27 20:12:11,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:11,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:11,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:11,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:11,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:12:11,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 277 transitions, 3409 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:11,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:11,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:12:11,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:12,560 INFO L124 PetriNetUnfolderBase]: 3086/4669 cut-off events. [2024-06-27 20:12:12,560 INFO L125 PetriNetUnfolderBase]: For 485153/485167 co-relation queries the response was YES. [2024-06-27 20:12:12,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46547 conditions, 4669 events. 3086/4669 cut-off events. For 485153/485167 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24274 event pairs, 702 based on Foata normal form. 16/4682 useless extension candidates. Maximal degree in co-relation 46462. Up to 4040 conditions per place. [2024-06-27 20:12:12,605 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 210 selfloop transitions, 74 changer transitions 0/311 dead transitions. [2024-06-27 20:12:12,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 311 transitions, 4405 flow [2024-06-27 20:12:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:12:12,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 20:12:12,606 INFO L175 Difference]: Start difference. First operand has 196 places, 277 transitions, 3409 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:12:12,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 311 transitions, 4405 flow [2024-06-27 20:12:13,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 311 transitions, 4149 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:13,037 INFO L231 Difference]: Finished difference. Result has 197 places, 280 transitions, 3459 flow [2024-06-27 20:12:13,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3153, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3459, PETRI_PLACES=197, PETRI_TRANSITIONS=280} [2024-06-27 20:12:13,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-27 20:12:13,038 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 280 transitions, 3459 flow [2024-06-27 20:12:13,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:13,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:13,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:13,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:12:13,038 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 20:12:13,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:13,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1989744370, now seen corresponding path program 9 times [2024-06-27 20:12:13,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:13,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059795196] [2024-06-27 20:12:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:13,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:13,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:13,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059795196] [2024-06-27 20:12:13,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059795196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:13,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:13,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:13,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289234494] [2024-06-27 20:12:13,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:13,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:13,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:13,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:13,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:13,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 280 transitions, 3459 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:13,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:13,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:13,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:14,660 INFO L124 PetriNetUnfolderBase]: 3213/4804 cut-off events. [2024-06-27 20:12:14,660 INFO L125 PetriNetUnfolderBase]: For 499559/499573 co-relation queries the response was YES. [2024-06-27 20:12:14,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47881 conditions, 4804 events. 3213/4804 cut-off events. For 499559/499573 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24532 event pairs, 687 based on Foata normal form. 11/4812 useless extension candidates. Maximal degree in co-relation 47795. Up to 3860 conditions per place. [2024-06-27 20:12:14,710 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 175 selfloop transitions, 139 changer transitions 0/318 dead transitions. [2024-06-27 20:12:14,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 318 transitions, 4741 flow [2024-06-27 20:12:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:12:14,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:12:14,711 INFO L175 Difference]: Start difference. First operand has 197 places, 280 transitions, 3459 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:12:14,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 318 transitions, 4741 flow [2024-06-27 20:12:15,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 318 transitions, 4459 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:15,189 INFO L231 Difference]: Finished difference. Result has 199 places, 284 transitions, 3614 flow [2024-06-27 20:12:15,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3177, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3614, PETRI_PLACES=199, PETRI_TRANSITIONS=284} [2024-06-27 20:12:15,190 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-27 20:12:15,190 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 284 transitions, 3614 flow [2024-06-27 20:12:15,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:15,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:15,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:15,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:12:15,191 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 20:12:15,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1704407350, now seen corresponding path program 10 times [2024-06-27 20:12:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:15,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408332714] [2024-06-27 20:12:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:15,969 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 20:12:15,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:15,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408332714] [2024-06-27 20:12:15,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408332714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:15,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:15,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:15,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3875883] [2024-06-27 20:12:15,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:15,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:15,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:15,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:15,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:16,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:16,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 284 transitions, 3614 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:16,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:16,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:16,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:16,892 INFO L124 PetriNetUnfolderBase]: 3201/4787 cut-off events. [2024-06-27 20:12:16,892 INFO L125 PetriNetUnfolderBase]: For 502680/502694 co-relation queries the response was YES. [2024-06-27 20:12:16,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47862 conditions, 4787 events. 3201/4787 cut-off events. For 502680/502694 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24403 event pairs, 715 based on Foata normal form. 11/4795 useless extension candidates. Maximal degree in co-relation 47775. Up to 3854 conditions per place. [2024-06-27 20:12:16,944 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 204 selfloop transitions, 111 changer transitions 0/319 dead transitions. [2024-06-27 20:12:16,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 319 transitions, 4874 flow [2024-06-27 20:12:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:12:16,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 20:12:16,945 INFO L175 Difference]: Start difference. First operand has 199 places, 284 transitions, 3614 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:12:16,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 319 transitions, 4874 flow [2024-06-27 20:12:17,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 319 transitions, 4462 flow, removed 108 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:17,531 INFO L231 Difference]: Finished difference. Result has 202 places, 284 transitions, 3434 flow [2024-06-27 20:12:17,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3434, PETRI_PLACES=202, PETRI_TRANSITIONS=284} [2024-06-27 20:12:17,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-27 20:12:17,531 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 284 transitions, 3434 flow [2024-06-27 20:12:17,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:17,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:17,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:17,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:12:17,532 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 20:12:17,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash 561504496, now seen corresponding path program 8 times [2024-06-27 20:12:17,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:17,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671829936] [2024-06-27 20:12:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:17,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:18,467 INFO 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 20:12:18,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:18,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671829936] [2024-06-27 20:12:18,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671829936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:18,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:18,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:18,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649445070] [2024-06-27 20:12:18,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:18,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:18,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:18,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:18,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 284 transitions, 3434 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:18,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:18,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:18,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:19,404 INFO L124 PetriNetUnfolderBase]: 3195/4778 cut-off events. [2024-06-27 20:12:19,404 INFO L125 PetriNetUnfolderBase]: For 508178/508192 co-relation queries the response was YES. [2024-06-27 20:12:19,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47411 conditions, 4778 events. 3195/4778 cut-off events. For 508178/508192 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24357 event pairs, 730 based on Foata normal form. 8/4783 useless extension candidates. Maximal degree in co-relation 47323. Up to 4352 conditions per place. [2024-06-27 20:12:19,455 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 238 selfloop transitions, 73 changer transitions 0/315 dead transitions. [2024-06-27 20:12:19,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 315 transitions, 4572 flow [2024-06-27 20:12:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:12:19,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 20:12:19,456 INFO L175 Difference]: Start difference. First operand has 202 places, 284 transitions, 3434 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:12:19,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 315 transitions, 4572 flow [2024-06-27 20:12:19,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 315 transitions, 4245 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:19,957 INFO L231 Difference]: Finished difference. Result has 204 places, 284 transitions, 3262 flow [2024-06-27 20:12:19,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3262, PETRI_PLACES=204, PETRI_TRANSITIONS=284} [2024-06-27 20:12:19,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-27 20:12:19,957 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 284 transitions, 3262 flow [2024-06-27 20:12:19,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:19,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:19,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:19,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:12:19,958 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 20:12:19,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:19,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1345089012, now seen corresponding path program 2 times [2024-06-27 20:12:19,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:19,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128002944] [2024-06-27 20:12:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:19,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:20,465 INFO 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 20:12:20,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:20,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128002944] [2024-06-27 20:12:20,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128002944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:20,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:20,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:20,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960610468] [2024-06-27 20:12:20,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:20,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:20,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:20,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:20,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:20,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:12:20,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 284 transitions, 3262 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 20:12:20,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:20,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:12:20,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:21,366 INFO L124 PetriNetUnfolderBase]: 3068/4649 cut-off events. [2024-06-27 20:12:21,366 INFO L125 PetriNetUnfolderBase]: For 518215/518229 co-relation queries the response was YES. [2024-06-27 20:12:21,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45828 conditions, 4649 events. 3068/4649 cut-off events. For 518215/518229 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24215 event pairs, 754 based on Foata normal form. 11/4657 useless extension candidates. Maximal degree in co-relation 45739. Up to 4336 conditions per place. [2024-06-27 20:12:21,412 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 250 selfloop transitions, 16 changer transitions 0/293 dead transitions. [2024-06-27 20:12:21,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 293 transitions, 3816 flow [2024-06-27 20:12:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 20:12:21,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-27 20:12:21,413 INFO L175 Difference]: Start difference. First operand has 204 places, 284 transitions, 3262 flow. Second operand 6 states and 109 transitions. [2024-06-27 20:12:21,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 293 transitions, 3816 flow [2024-06-27 20:12:21,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 293 transitions, 3579 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 20:12:21,928 INFO L231 Difference]: Finished difference. Result has 201 places, 284 transitions, 3063 flow [2024-06-27 20:12:21,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3025, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3063, PETRI_PLACES=201, PETRI_TRANSITIONS=284} [2024-06-27 20:12:21,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-27 20:12:21,929 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 284 transitions, 3063 flow [2024-06-27 20:12:21,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 20:12:21,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:21,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:21,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:12:21,929 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:21,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:21,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1032343354, now seen corresponding path program 1 times [2024-06-27 20:12:21,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:21,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355301817] [2024-06-27 20:12:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:21,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:22,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:22,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355301817] [2024-06-27 20:12:22,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355301817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:22,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:22,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:22,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305248486] [2024-06-27 20:12:22,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:22,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:22,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:22,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:22,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:12:22,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 284 transitions, 3063 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:22,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:22,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:12:22,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:23,179 INFO L124 PetriNetUnfolderBase]: 2793/4368 cut-off events. [2024-06-27 20:12:23,179 INFO L125 PetriNetUnfolderBase]: For 450089/450089 co-relation queries the response was YES. [2024-06-27 20:12:23,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41073 conditions, 4368 events. 2793/4368 cut-off events. For 450089/450089 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23461 event pairs, 639 based on Foata normal form. 2/4368 useless extension candidates. Maximal degree in co-relation 40984. Up to 3925 conditions per place. [2024-06-27 20:12:23,223 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 253 selfloop transitions, 19 changer transitions 0/300 dead transitions. [2024-06-27 20:12:23,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 300 transitions, 3788 flow [2024-06-27 20:12:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:12:23,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:12:23,223 INFO L175 Difference]: Start difference. First operand has 201 places, 284 transitions, 3063 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:12:23,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 300 transitions, 3788 flow [2024-06-27 20:12:23,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 300 transitions, 3748 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:23,702 INFO L231 Difference]: Finished difference. Result has 202 places, 287 transitions, 3106 flow [2024-06-27 20:12:23,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3023, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3106, PETRI_PLACES=202, PETRI_TRANSITIONS=287} [2024-06-27 20:12:23,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-27 20:12:23,702 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 287 transitions, 3106 flow [2024-06-27 20:12:23,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:23,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:23,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:23,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:12:23,703 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:23,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1345081076, now seen corresponding path program 2 times [2024-06-27 20:12:23,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:23,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380249871] [2024-06-27 20:12:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:23,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:24,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380249871] [2024-06-27 20:12:24,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380249871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:24,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:24,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:24,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908123509] [2024-06-27 20:12:24,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:24,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:24,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:24,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:24,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:24,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:12:24,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 287 transitions, 3106 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:24,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:24,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:12:24,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:24,994 INFO L124 PetriNetUnfolderBase]: 2765/4324 cut-off events. [2024-06-27 20:12:24,994 INFO L125 PetriNetUnfolderBase]: For 459469/459469 co-relation queries the response was YES. [2024-06-27 20:12:25,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41083 conditions, 4324 events. 2765/4324 cut-off events. For 459469/459469 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23189 event pairs, 637 based on Foata normal form. 1/4323 useless extension candidates. Maximal degree in co-relation 40993. Up to 3915 conditions per place. [2024-06-27 20:12:25,045 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 257 selfloop transitions, 11 changer transitions 0/296 dead transitions. [2024-06-27 20:12:25,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 296 transitions, 3664 flow [2024-06-27 20:12:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 20:12:25,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:12:25,046 INFO L175 Difference]: Start difference. First operand has 202 places, 287 transitions, 3106 flow. Second operand 6 states and 112 transitions. [2024-06-27 20:12:25,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 296 transitions, 3664 flow [2024-06-27 20:12:25,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 296 transitions, 3635 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:12:25,582 INFO L231 Difference]: Finished difference. Result has 205 places, 287 transitions, 3105 flow [2024-06-27 20:12:25,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3077, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3105, PETRI_PLACES=205, PETRI_TRANSITIONS=287} [2024-06-27 20:12:25,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-27 20:12:25,583 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 287 transitions, 3105 flow [2024-06-27 20:12:25,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:25,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:25,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:25,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:12:25,584 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 20:12:25,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:25,584 INFO L85 PathProgramCache]: Analyzing trace with hash -646532328, now seen corresponding path program 1 times [2024-06-27 20:12:25,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:25,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280512425] [2024-06-27 20:12:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:26,430 INFO 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 20:12:26,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:26,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280512425] [2024-06-27 20:12:26,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280512425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:26,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:26,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020562999] [2024-06-27 20:12:26,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:26,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:26,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:26,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:26,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 287 transitions, 3105 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:26,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:26,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:26,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:27,549 INFO L124 PetriNetUnfolderBase]: 3168/4733 cut-off events. [2024-06-27 20:12:27,549 INFO L125 PetriNetUnfolderBase]: For 559465/559465 co-relation queries the response was YES. [2024-06-27 20:12:27,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46811 conditions, 4733 events. 3168/4733 cut-off events. For 559465/559465 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 24033 event pairs, 715 based on Foata normal form. 3/4734 useless extension candidates. Maximal degree in co-relation 46720. Up to 4517 conditions per place. [2024-06-27 20:12:27,600 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 301 selfloop transitions, 40 changer transitions 0/345 dead transitions. [2024-06-27 20:12:27,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 345 transitions, 4717 flow [2024-06-27 20:12:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:12:27,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 20:12:27,601 INFO L175 Difference]: Start difference. First operand has 205 places, 287 transitions, 3105 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:12:27,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 345 transitions, 4717 flow [2024-06-27 20:12:28,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 345 transitions, 4670 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:28,015 INFO L231 Difference]: Finished difference. Result has 211 places, 298 transitions, 3516 flow [2024-06-27 20:12:28,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3058, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3516, PETRI_PLACES=211, PETRI_TRANSITIONS=298} [2024-06-27 20:12:28,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-27 20:12:28,016 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 298 transitions, 3516 flow [2024-06-27 20:12:28,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:28,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:28,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:28,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:12:28,016 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 20:12:28,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash -642807461, now seen corresponding path program 1 times [2024-06-27 20:12:28,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:28,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171322920] [2024-06-27 20:12:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:28,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:28,902 INFO 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 20:12:28,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:28,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171322920] [2024-06-27 20:12:28,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171322920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:28,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:28,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:28,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588114048] [2024-06-27 20:12:28,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:28,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:28,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:28,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:29,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:29,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 298 transitions, 3516 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:29,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:29,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:29,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:30,054 INFO L124 PetriNetUnfolderBase]: 3204/4787 cut-off events. [2024-06-27 20:12:30,054 INFO L125 PetriNetUnfolderBase]: For 594167/594167 co-relation queries the response was YES. [2024-06-27 20:12:30,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48529 conditions, 4787 events. 3204/4787 cut-off events. For 594167/594167 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 24396 event pairs, 687 based on Foata normal form. 6/4791 useless extension candidates. Maximal degree in co-relation 48435. Up to 4521 conditions per place. [2024-06-27 20:12:30,105 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 304 selfloop transitions, 40 changer transitions 0/348 dead transitions. [2024-06-27 20:12:30,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 348 transitions, 4854 flow [2024-06-27 20:12:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:12:30,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 20:12:30,106 INFO L175 Difference]: Start difference. First operand has 211 places, 298 transitions, 3516 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:12:30,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 348 transitions, 4854 flow [2024-06-27 20:12:30,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 348 transitions, 4609 flow, removed 106 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:30,760 INFO L231 Difference]: Finished difference. Result has 216 places, 303 transitions, 3545 flow [2024-06-27 20:12:30,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3545, PETRI_PLACES=216, PETRI_TRANSITIONS=303} [2024-06-27 20:12:30,760 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-27 20:12:30,760 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 303 transitions, 3545 flow [2024-06-27 20:12:30,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:30,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:30,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:30,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:12:30,761 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:30,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash -498916931, now seen corresponding path program 2 times [2024-06-27 20:12:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:30,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935914110] [2024-06-27 20:12:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:30,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:31,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:31,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935914110] [2024-06-27 20:12:31,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935914110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:31,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:31,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:31,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798351954] [2024-06-27 20:12:31,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:31,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:31,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:31,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:31,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:31,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 303 transitions, 3545 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:31,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:31,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:31,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:32,820 INFO L124 PetriNetUnfolderBase]: 3240/4837 cut-off events. [2024-06-27 20:12:32,821 INFO L125 PetriNetUnfolderBase]: For 617535/617535 co-relation queries the response was YES. [2024-06-27 20:12:32,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49998 conditions, 4837 events. 3240/4837 cut-off events. For 617535/617535 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24620 event pairs, 681 based on Foata normal form. 6/4841 useless extension candidates. Maximal degree in co-relation 49902. Up to 4430 conditions per place. [2024-06-27 20:12:32,867 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 292 selfloop transitions, 55 changer transitions 0/351 dead transitions. [2024-06-27 20:12:32,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 351 transitions, 4907 flow [2024-06-27 20:12:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:12:32,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 20:12:32,868 INFO L175 Difference]: Start difference. First operand has 216 places, 303 transitions, 3545 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:12:32,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 351 transitions, 4907 flow [2024-06-27 20:12:33,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 351 transitions, 4669 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:33,425 INFO L231 Difference]: Finished difference. Result has 218 places, 308 transitions, 3621 flow [2024-06-27 20:12:33,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3307, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3621, PETRI_PLACES=218, PETRI_TRANSITIONS=308} [2024-06-27 20:12:33,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-27 20:12:33,426 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 308 transitions, 3621 flow [2024-06-27 20:12:33,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:33,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:33,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:33,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:12:33,426 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:33,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:33,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1596797767, now seen corresponding path program 3 times [2024-06-27 20:12:33,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:33,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753724974] [2024-06-27 20:12:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:34,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:34,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753724974] [2024-06-27 20:12:34,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753724974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:34,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:34,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:34,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247522267] [2024-06-27 20:12:34,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:34,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:34,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:34,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 308 transitions, 3621 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:34,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:34,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:34,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:35,417 INFO L124 PetriNetUnfolderBase]: 3276/4884 cut-off events. [2024-06-27 20:12:35,417 INFO L125 PetriNetUnfolderBase]: For 642719/642719 co-relation queries the response was YES. [2024-06-27 20:12:35,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51314 conditions, 4884 events. 3276/4884 cut-off events. For 642719/642719 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24840 event pairs, 673 based on Foata normal form. 6/4888 useless extension candidates. Maximal degree in co-relation 51217. Up to 4482 conditions per place. [2024-06-27 20:12:35,469 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 291 selfloop transitions, 60 changer transitions 0/355 dead transitions. [2024-06-27 20:12:35,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 355 transitions, 4887 flow [2024-06-27 20:12:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:12:35,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 20:12:35,470 INFO L175 Difference]: Start difference. First operand has 218 places, 308 transitions, 3621 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:12:35,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 355 transitions, 4887 flow [2024-06-27 20:12:36,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 355 transitions, 4609 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:36,071 INFO L231 Difference]: Finished difference. Result has 220 places, 313 transitions, 3677 flow [2024-06-27 20:12:36,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3343, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3677, PETRI_PLACES=220, PETRI_TRANSITIONS=313} [2024-06-27 20:12:36,072 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-27 20:12:36,072 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 313 transitions, 3677 flow [2024-06-27 20:12:36,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:36,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:36,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:36,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:12:36,072 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:36,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -498707681, now seen corresponding path program 4 times [2024-06-27 20:12:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:36,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807378736] [2024-06-27 20:12:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:36,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:36,994 INFO 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 20:12:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807378736] [2024-06-27 20:12:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807378736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:36,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:36,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755581714] [2024-06-27 20:12:36,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:36,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:36,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:37,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:37,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 313 transitions, 3677 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:37,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:37,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:37,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:38,238 INFO L124 PetriNetUnfolderBase]: 3294/4915 cut-off events. [2024-06-27 20:12:38,238 INFO L125 PetriNetUnfolderBase]: For 655603/655603 co-relation queries the response was YES. [2024-06-27 20:12:38,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52139 conditions, 4915 events. 3294/4915 cut-off events. For 655603/655603 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 25046 event pairs, 673 based on Foata normal form. 3/4916 useless extension candidates. Maximal degree in co-relation 52041. Up to 4430 conditions per place. [2024-06-27 20:12:38,290 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 281 selfloop transitions, 78 changer transitions 0/363 dead transitions. [2024-06-27 20:12:38,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 363 transitions, 4963 flow [2024-06-27 20:12:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 20:12:38,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:12:38,292 INFO L175 Difference]: Start difference. First operand has 220 places, 313 transitions, 3677 flow. Second operand 11 states and 215 transitions. [2024-06-27 20:12:38,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 363 transitions, 4963 flow [2024-06-27 20:12:38,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 363 transitions, 4665 flow, removed 92 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:38,919 INFO L231 Difference]: Finished difference. Result has 223 places, 317 transitions, 3736 flow [2024-06-27 20:12:38,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3379, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3736, PETRI_PLACES=223, PETRI_TRANSITIONS=317} [2024-06-27 20:12:38,920 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-27 20:12:38,920 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 317 transitions, 3736 flow [2024-06-27 20:12:38,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:38,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:38,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:38,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:12:38,920 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:38,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:38,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1596790048, now seen corresponding path program 1 times [2024-06-27 20:12:38,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:38,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806380055] [2024-06-27 20:12:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:38,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:40,222 INFO 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 20:12:40,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:40,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806380055] [2024-06-27 20:12:40,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806380055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:40,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:40,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:40,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475361632] [2024-06-27 20:12:40,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:40,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:40,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:40,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:40,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:40,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:40,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 317 transitions, 3736 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:40,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:40,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:40,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:41,496 INFO L124 PetriNetUnfolderBase]: 3322/4959 cut-off events. [2024-06-27 20:12:41,496 INFO L125 PetriNetUnfolderBase]: For 684815/684815 co-relation queries the response was YES. [2024-06-27 20:12:41,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53162 conditions, 4959 events. 3322/4959 cut-off events. For 684815/684815 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 25344 event pairs, 697 based on Foata normal form. 6/4963 useless extension candidates. Maximal degree in co-relation 53063. Up to 4748 conditions per place. [2024-06-27 20:12:41,545 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 319 selfloop transitions, 37 changer transitions 0/360 dead transitions. [2024-06-27 20:12:41,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 360 transitions, 4972 flow [2024-06-27 20:12:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:12:41,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-27 20:12:41,547 INFO L175 Difference]: Start difference. First operand has 223 places, 317 transitions, 3736 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:12:41,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 360 transitions, 4972 flow [2024-06-27 20:12:42,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 360 transitions, 4665 flow, removed 81 selfloop flow, removed 9 redundant places. [2024-06-27 20:12:42,210 INFO L231 Difference]: Finished difference. Result has 224 places, 320 transitions, 3685 flow [2024-06-27 20:12:42,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3685, PETRI_PLACES=224, PETRI_TRANSITIONS=320} [2024-06-27 20:12:42,211 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-27 20:12:42,211 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 320 transitions, 3685 flow [2024-06-27 20:12:42,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:42,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:42,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:42,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:12:42,211 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 20:12:42,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:42,211 INFO L85 PathProgramCache]: Analyzing trace with hash -398507498, now seen corresponding path program 1 times [2024-06-27 20:12:42,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:42,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529331820] [2024-06-27 20:12:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:42,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:42,815 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 20:12:42,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:42,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529331820] [2024-06-27 20:12:42,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529331820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:42,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:42,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:12:42,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360251816] [2024-06-27 20:12:42,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:42,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:12:42,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:12:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:12:42,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:42,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 320 transitions, 3685 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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 20:12:42,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:42,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:42,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:43,923 INFO L124 PetriNetUnfolderBase]: 3327/4966 cut-off events. [2024-06-27 20:12:43,923 INFO L125 PetriNetUnfolderBase]: For 689348/689348 co-relation queries the response was YES. [2024-06-27 20:12:43,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53265 conditions, 4966 events. 3327/4966 cut-off events. For 689348/689348 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 25342 event pairs, 705 based on Foata normal form. 1/4965 useless extension candidates. Maximal degree in co-relation 53165. Up to 4826 conditions per place. [2024-06-27 20:12:43,974 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 318 selfloop transitions, 24 changer transitions 0/346 dead transitions. [2024-06-27 20:12:43,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 346 transitions, 4617 flow [2024-06-27 20:12:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:12:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:12:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:12:43,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 20:12:43,975 INFO L175 Difference]: Start difference. First operand has 224 places, 320 transitions, 3685 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:12:43,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 346 transitions, 4617 flow [2024-06-27 20:12:44,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 346 transitions, 4379 flow, removed 81 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:44,620 INFO L231 Difference]: Finished difference. Result has 223 places, 323 transitions, 3561 flow [2024-06-27 20:12:44,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3453, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3561, PETRI_PLACES=223, PETRI_TRANSITIONS=323} [2024-06-27 20:12:44,620 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-27 20:12:44,621 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 323 transitions, 3561 flow [2024-06-27 20:12:44,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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 20:12:44,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:44,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:44,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:12:44,621 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:44,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:44,621 INFO L85 PathProgramCache]: Analyzing trace with hash -537152144, now seen corresponding path program 2 times [2024-06-27 20:12:44,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:44,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597414028] [2024-06-27 20:12:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:44,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:45,570 INFO 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 20:12:45,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:45,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597414028] [2024-06-27 20:12:45,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597414028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:45,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:45,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:45,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872440021] [2024-06-27 20:12:45,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:45,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:45,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:45,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:45,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 323 transitions, 3561 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:45,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:45,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:45,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:46,802 INFO L124 PetriNetUnfolderBase]: 3393/5068 cut-off events. [2024-06-27 20:12:46,802 INFO L125 PetriNetUnfolderBase]: For 741298/741298 co-relation queries the response was YES. [2024-06-27 20:12:46,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54747 conditions, 5068 events. 3393/5068 cut-off events. For 741298/741298 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 26042 event pairs, 694 based on Foata normal form. 6/5072 useless extension candidates. Maximal degree in co-relation 54646. Up to 4607 conditions per place. [2024-06-27 20:12:46,857 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 283 selfloop transitions, 82 changer transitions 0/369 dead transitions. [2024-06-27 20:12:46,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 369 transitions, 5251 flow [2024-06-27 20:12:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:12:46,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 20:12:46,858 INFO L175 Difference]: Start difference. First operand has 223 places, 323 transitions, 3561 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:12:46,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 369 transitions, 5251 flow [2024-06-27 20:12:47,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 369 transitions, 5183 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:47,445 INFO L231 Difference]: Finished difference. Result has 228 places, 329 transitions, 4019 flow [2024-06-27 20:12:47,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4019, PETRI_PLACES=228, PETRI_TRANSITIONS=329} [2024-06-27 20:12:47,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-27 20:12:47,446 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 329 transitions, 4019 flow [2024-06-27 20:12:47,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:47,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:47,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:47,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:12:47,447 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:47,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash -537161444, now seen corresponding path program 3 times [2024-06-27 20:12:47,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:47,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749578633] [2024-06-27 20:12:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:47,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:48,482 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 20:12:48,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:48,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749578633] [2024-06-27 20:12:48,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749578633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:48,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:48,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:48,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065695813] [2024-06-27 20:12:48,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:48,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:48,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:48,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:48,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:48,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:48,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 329 transitions, 4019 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:48,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:48,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:48,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:49,768 INFO L124 PetriNetUnfolderBase]: 3421/5112 cut-off events. [2024-06-27 20:12:49,768 INFO L125 PetriNetUnfolderBase]: For 771739/771739 co-relation queries the response was YES. [2024-06-27 20:12:49,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56287 conditions, 5112 events. 3421/5112 cut-off events. For 771739/771739 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 26330 event pairs, 707 based on Foata normal form. 6/5116 useless extension candidates. Maximal degree in co-relation 56185. Up to 4753 conditions per place. [2024-06-27 20:12:49,824 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 294 selfloop transitions, 75 changer transitions 0/373 dead transitions. [2024-06-27 20:12:49,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 373 transitions, 5307 flow [2024-06-27 20:12:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-27 20:12:49,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376321353065539 [2024-06-27 20:12:49,825 INFO L175 Difference]: Start difference. First operand has 228 places, 329 transitions, 4019 flow. Second operand 11 states and 207 transitions. [2024-06-27 20:12:49,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 373 transitions, 5307 flow [2024-06-27 20:12:50,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 373 transitions, 4982 flow, removed 116 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:50,494 INFO L231 Difference]: Finished difference. Result has 233 places, 332 transitions, 4039 flow [2024-06-27 20:12:50,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4039, PETRI_PLACES=233, PETRI_TRANSITIONS=332} [2024-06-27 20:12:50,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-27 20:12:50,495 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 332 transitions, 4039 flow [2024-06-27 20:12:50,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:50,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:50,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:50,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:12:50,496 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 20:12:50,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash -537421193, now seen corresponding path program 5 times [2024-06-27 20:12:50,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:50,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881889207] [2024-06-27 20:12:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:51,436 INFO 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 20:12:51,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881889207] [2024-06-27 20:12:51,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881889207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:51,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:51,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958138069] [2024-06-27 20:12:51,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:51,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:51,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:51,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:51,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:51,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:51,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 332 transitions, 4039 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:51,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:51,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:51,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:52,544 INFO L124 PetriNetUnfolderBase]: 3463/5184 cut-off events. [2024-06-27 20:12:52,544 INFO L125 PetriNetUnfolderBase]: For 787463/787463 co-relation queries the response was YES. [2024-06-27 20:12:52,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57195 conditions, 5184 events. 3463/5184 cut-off events. For 787463/787463 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 26872 event pairs, 658 based on Foata normal form. 3/5185 useless extension candidates. Maximal degree in co-relation 57091. Up to 4696 conditions per place. [2024-06-27 20:12:52,603 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 318 selfloop transitions, 92 changer transitions 0/414 dead transitions. [2024-06-27 20:12:52,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 414 transitions, 6273 flow [2024-06-27 20:12:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:12:52,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 20:12:52,604 INFO L175 Difference]: Start difference. First operand has 233 places, 332 transitions, 4039 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:12:52,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 414 transitions, 6273 flow [2024-06-27 20:12:53,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 414 transitions, 5966 flow, removed 68 selfloop flow, removed 10 redundant places. [2024-06-27 20:12:53,255 INFO L231 Difference]: Finished difference. Result has 236 places, 373 transitions, 4860 flow [2024-06-27 20:12:53,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4860, PETRI_PLACES=236, PETRI_TRANSITIONS=373} [2024-06-27 20:12:53,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-27 20:12:53,255 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 373 transitions, 4860 flow [2024-06-27 20:12:53,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:53,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:53,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:53,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:12:53,255 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 20:12:53,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash 560654013, now seen corresponding path program 6 times [2024-06-27 20:12:53,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:53,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864356957] [2024-06-27 20:12:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:53,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:54,190 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 20:12:54,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:54,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864356957] [2024-06-27 20:12:54,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864356957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:54,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:54,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:54,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91024122] [2024-06-27 20:12:54,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:54,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:54,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:54,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:54,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:54,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:54,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 373 transitions, 4860 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:54,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:54,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:54,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:55,361 INFO L124 PetriNetUnfolderBase]: 3475/5201 cut-off events. [2024-06-27 20:12:55,362 INFO L125 PetriNetUnfolderBase]: For 812505/812505 co-relation queries the response was YES. [2024-06-27 20:12:55,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58264 conditions, 5201 events. 3475/5201 cut-off events. For 812505/812505 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 26974 event pairs, 670 based on Foata normal form. 6/5205 useless extension candidates. Maximal degree in co-relation 58156. Up to 4553 conditions per place. [2024-06-27 20:12:55,422 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 281 selfloop transitions, 128 changer transitions 0/413 dead transitions. [2024-06-27 20:12:55,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 413 transitions, 6258 flow [2024-06-27 20:12:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:12:55,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 20:12:55,423 INFO L175 Difference]: Start difference. First operand has 236 places, 373 transitions, 4860 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:12:55,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 413 transitions, 6258 flow [2024-06-27 20:12:56,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 413 transitions, 5849 flow, removed 192 selfloop flow, removed 3 redundant places. [2024-06-27 20:12:56,234 INFO L231 Difference]: Finished difference. Result has 243 places, 377 transitions, 4943 flow [2024-06-27 20:12:56,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4943, PETRI_PLACES=243, PETRI_TRANSITIONS=377} [2024-06-27 20:12:56,235 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-27 20:12:56,235 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 377 transitions, 4943 flow [2024-06-27 20:12:56,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:56,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:56,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:56,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:12:56,235 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 20:12:56,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:56,236 INFO L85 PathProgramCache]: Analyzing trace with hash 560920923, now seen corresponding path program 7 times [2024-06-27 20:12:56,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:56,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389667035] [2024-06-27 20:12:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:56,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:57,171 INFO 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 20:12:57,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:57,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389667035] [2024-06-27 20:12:57,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389667035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:57,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:57,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:57,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371025109] [2024-06-27 20:12:57,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:57,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:57,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:57,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:57,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:57,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:57,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 377 transitions, 4943 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:57,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:57,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:57,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:58,537 INFO L124 PetriNetUnfolderBase]: 3541/5290 cut-off events. [2024-06-27 20:12:58,537 INFO L125 PetriNetUnfolderBase]: For 849492/849492 co-relation queries the response was YES. [2024-06-27 20:12:58,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60601 conditions, 5290 events. 3541/5290 cut-off events. For 849492/849492 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27460 event pairs, 670 based on Foata normal form. 3/5291 useless extension candidates. Maximal degree in co-relation 60491. Up to 4409 conditions per place. [2024-06-27 20:12:58,605 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 250 selfloop transitions, 178 changer transitions 0/432 dead transitions. [2024-06-27 20:12:58,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 432 transitions, 6903 flow [2024-06-27 20:12:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:12:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:12:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-06-27 20:12:58,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45542635658914726 [2024-06-27 20:12:58,606 INFO L175 Difference]: Start difference. First operand has 243 places, 377 transitions, 4943 flow. Second operand 12 states and 235 transitions. [2024-06-27 20:12:58,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 432 transitions, 6903 flow [2024-06-27 20:12:59,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 432 transitions, 6447 flow, removed 105 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:59,501 INFO L231 Difference]: Finished difference. Result has 248 places, 386 transitions, 5368 flow [2024-06-27 20:12:59,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4487, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5368, PETRI_PLACES=248, PETRI_TRANSITIONS=386} [2024-06-27 20:12:59,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-27 20:12:59,502 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 386 transitions, 5368 flow [2024-06-27 20:12:59,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:59,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:59,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:59,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:12:59,502 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 20:12:59,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:59,503 INFO L85 PathProgramCache]: Analyzing trace with hash -386832963, now seen corresponding path program 8 times [2024-06-27 20:12:59,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:59,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057835768] [2024-06-27 20:12:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:59,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:00,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:00,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057835768] [2024-06-27 20:13:00,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057835768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:00,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:00,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:00,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511492104] [2024-06-27 20:13:00,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:00,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:00,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:00,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:00,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 386 transitions, 5368 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:00,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:00,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:00,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:01,801 INFO L124 PetriNetUnfolderBase]: 3577/5352 cut-off events. [2024-06-27 20:13:01,801 INFO L125 PetriNetUnfolderBase]: For 888076/888076 co-relation queries the response was YES. [2024-06-27 20:13:01,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62735 conditions, 5352 events. 3577/5352 cut-off events. For 888076/888076 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 27886 event pairs, 670 based on Foata normal form. 6/5356 useless extension candidates. Maximal degree in co-relation 62623. Up to 4699 conditions per place. [2024-06-27 20:13:01,858 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 326 selfloop transitions, 102 changer transitions 0/432 dead transitions. [2024-06-27 20:13:01,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 432 transitions, 7160 flow [2024-06-27 20:13:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:13:01,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 20:13:01,860 INFO L175 Difference]: Start difference. First operand has 248 places, 386 transitions, 5368 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:13:01,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 432 transitions, 7160 flow [2024-06-27 20:13:02,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 432 transitions, 6692 flow, removed 143 selfloop flow, removed 9 redundant places. [2024-06-27 20:13:02,711 INFO L231 Difference]: Finished difference. Result has 249 places, 391 transitions, 5384 flow [2024-06-27 20:13:02,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4948, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5384, PETRI_PLACES=249, PETRI_TRANSITIONS=391} [2024-06-27 20:13:02,712 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-27 20:13:02,712 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 391 transitions, 5384 flow [2024-06-27 20:13:02,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:02,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:02,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:02,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:13:02,712 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 20:13:02,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:02,712 INFO L85 PathProgramCache]: Analyzing trace with hash 553504173, now seen corresponding path program 9 times [2024-06-27 20:13:02,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:02,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170599288] [2024-06-27 20:13:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:02,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:03,627 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 20:13:03,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:03,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170599288] [2024-06-27 20:13:03,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170599288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:03,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:03,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:03,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045647309] [2024-06-27 20:13:03,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:03,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:03,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:03,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 391 transitions, 5384 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:03,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:03,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:03,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:04,933 INFO L124 PetriNetUnfolderBase]: 3589/5360 cut-off events. [2024-06-27 20:13:04,933 INFO L125 PetriNetUnfolderBase]: For 872088/872088 co-relation queries the response was YES. [2024-06-27 20:13:04,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62138 conditions, 5360 events. 3589/5360 cut-off events. For 872088/872088 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27802 event pairs, 670 based on Foata normal form. 6/5364 useless extension candidates. Maximal degree in co-relation 62025. Up to 4717 conditions per place. [2024-06-27 20:13:04,994 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 327 selfloop transitions, 104 changer transitions 0/435 dead transitions. [2024-06-27 20:13:04,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 435 transitions, 6981 flow [2024-06-27 20:13:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 20:13:04,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 20:13:04,996 INFO L175 Difference]: Start difference. First operand has 249 places, 391 transitions, 5384 flow. Second operand 10 states and 199 transitions. [2024-06-27 20:13:04,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 435 transitions, 6981 flow [2024-06-27 20:13:06,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 435 transitions, 6598 flow, removed 93 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:06,055 INFO L231 Difference]: Finished difference. Result has 251 places, 395 transitions, 5422 flow [2024-06-27 20:13:06,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5001, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5422, PETRI_PLACES=251, PETRI_TRANSITIONS=395} [2024-06-27 20:13:06,056 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-27 20:13:06,056 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 395 transitions, 5422 flow [2024-06-27 20:13:06,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:06,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:06,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:06,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:13:06,057 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 20:13:06,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash -544571033, now seen corresponding path program 10 times [2024-06-27 20:13:06,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:06,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897466266] [2024-06-27 20:13:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:06,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:06,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:06,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897466266] [2024-06-27 20:13:06,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897466266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:06,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:06,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:06,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703505417] [2024-06-27 20:13:06,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:06,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:06,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:07,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:07,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 395 transitions, 5422 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:07,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:07,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:07,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:08,362 INFO L124 PetriNetUnfolderBase]: 3583/5358 cut-off events. [2024-06-27 20:13:08,362 INFO L125 PetriNetUnfolderBase]: For 871697/871697 co-relation queries the response was YES. [2024-06-27 20:13:08,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61585 conditions, 5358 events. 3583/5358 cut-off events. For 871697/871697 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27853 event pairs, 658 based on Foata normal form. 3/5359 useless extension candidates. Maximal degree in co-relation 61471. Up to 4860 conditions per place. [2024-06-27 20:13:08,428 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 354 selfloop transitions, 85 changer transitions 0/443 dead transitions. [2024-06-27 20:13:08,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 443 transitions, 7063 flow [2024-06-27 20:13:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 20:13:08,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:13:08,429 INFO L175 Difference]: Start difference. First operand has 251 places, 395 transitions, 5422 flow. Second operand 10 states and 195 transitions. [2024-06-27 20:13:08,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 443 transitions, 7063 flow [2024-06-27 20:13:09,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 443 transitions, 6387 flow, removed 236 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:09,455 INFO L231 Difference]: Finished difference. Result has 254 places, 403 transitions, 5179 flow [2024-06-27 20:13:09,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4913, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5179, PETRI_PLACES=254, PETRI_TRANSITIONS=403} [2024-06-27 20:13:09,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-27 20:13:09,456 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 403 transitions, 5179 flow [2024-06-27 20:13:09,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:09,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:09,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:09,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:13:09,456 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 20:13:09,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash -544570754, now seen corresponding path program 4 times [2024-06-27 20:13:09,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:09,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223587451] [2024-06-27 20:13:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:09,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:10,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:10,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223587451] [2024-06-27 20:13:10,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223587451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:10,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:10,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:10,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016244083] [2024-06-27 20:13:10,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:10,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:10,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:10,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:10,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:10,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:10,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 403 transitions, 5179 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:10,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:10,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:10,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:11,786 INFO L124 PetriNetUnfolderBase]: 3573/5338 cut-off events. [2024-06-27 20:13:11,786 INFO L125 PetriNetUnfolderBase]: For 874741/874741 co-relation queries the response was YES. [2024-06-27 20:13:11,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60535 conditions, 5338 events. 3573/5338 cut-off events. For 874741/874741 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27713 event pairs, 674 based on Foata normal form. 6/5342 useless extension candidates. Maximal degree in co-relation 60419. Up to 5033 conditions per place. [2024-06-27 20:13:11,854 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 383 selfloop transitions, 54 changer transitions 0/441 dead transitions. [2024-06-27 20:13:11,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 441 transitions, 6585 flow [2024-06-27 20:13:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:13:11,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:13:11,855 INFO L175 Difference]: Start difference. First operand has 254 places, 403 transitions, 5179 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:13:11,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 441 transitions, 6585 flow [2024-06-27 20:13:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 441 transitions, 6242 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:12,919 INFO L231 Difference]: Finished difference. Result has 259 places, 403 transitions, 4952 flow [2024-06-27 20:13:12,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4836, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4952, PETRI_PLACES=259, PETRI_TRANSITIONS=403} [2024-06-27 20:13:12,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-27 20:13:12,919 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 403 transitions, 4952 flow [2024-06-27 20:13:12,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:12,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:12,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:12,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:13:12,920 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:12,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1041212762, now seen corresponding path program 2 times [2024-06-27 20:13:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470840886] [2024-06-27 20:13:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:12,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:13,552 INFO 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 20:13:13,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:13,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470840886] [2024-06-27 20:13:13,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470840886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:13,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:13,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:13,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188096378] [2024-06-27 20:13:13,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:13,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:13,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:13,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:13,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:13,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:13,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 403 transitions, 4952 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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 20:13:13,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:13,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:13,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:14,766 INFO L124 PetriNetUnfolderBase]: 3578/5345 cut-off events. [2024-06-27 20:13:14,767 INFO L125 PetriNetUnfolderBase]: For 877844/877844 co-relation queries the response was YES. [2024-06-27 20:13:14,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60231 conditions, 5345 events. 3578/5345 cut-off events. For 877844/877844 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27769 event pairs, 678 based on Foata normal form. 1/5344 useless extension candidates. Maximal degree in co-relation 60114. Up to 5198 conditions per place. [2024-06-27 20:13:14,831 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 393 selfloop transitions, 26 changer transitions 0/423 dead transitions. [2024-06-27 20:13:14,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 423 transitions, 6046 flow [2024-06-27 20:13:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:13:14,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:13:14,832 INFO L175 Difference]: Start difference. First operand has 259 places, 403 transitions, 4952 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:13:14,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 423 transitions, 6046 flow [2024-06-27 20:13:15,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 423 transitions, 5903 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 20:13:15,813 INFO L231 Difference]: Finished difference. Result has 257 places, 406 transitions, 4933 flow [2024-06-27 20:13:15,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4933, PETRI_PLACES=257, PETRI_TRANSITIONS=406} [2024-06-27 20:13:15,814 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-27 20:13:15,814 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 406 transitions, 4933 flow [2024-06-27 20:13:15,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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 20:13:15,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:15,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:15,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:13:15,814 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:15,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash -398149014, now seen corresponding path program 1 times [2024-06-27 20:13:15,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:15,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935681606] [2024-06-27 20:13:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:15,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:16,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935681606] [2024-06-27 20:13:16,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935681606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:16,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:16,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:16,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563443570] [2024-06-27 20:13:16,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:16,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:16,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:16,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:16,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:16,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:13:16,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 406 transitions, 4933 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:13:16,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:16,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:13:16,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:17,578 INFO L124 PetriNetUnfolderBase]: 3411/5180 cut-off events. [2024-06-27 20:13:17,578 INFO L125 PetriNetUnfolderBase]: For 892504/892504 co-relation queries the response was YES. [2024-06-27 20:13:17,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58738 conditions, 5180 events. 3411/5180 cut-off events. For 892504/892504 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27562 event pairs, 678 based on Foata normal form. 1/5179 useless extension candidates. Maximal degree in co-relation 58620. Up to 4810 conditions per place. [2024-06-27 20:13:17,639 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 376 selfloop transitions, 23 changer transitions 0/432 dead transitions. [2024-06-27 20:13:17,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 432 transitions, 6033 flow [2024-06-27 20:13:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:13:17,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 20:13:17,640 INFO L175 Difference]: Start difference. First operand has 257 places, 406 transitions, 4933 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:13:17,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 432 transitions, 6033 flow [2024-06-27 20:13:18,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 432 transitions, 5975 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:13:18,571 INFO L231 Difference]: Finished difference. Result has 261 places, 415 transitions, 5055 flow [2024-06-27 20:13:18,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5055, PETRI_PLACES=261, PETRI_TRANSITIONS=415} [2024-06-27 20:13:18,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-27 20:13:18,572 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 415 transitions, 5055 flow [2024-06-27 20:13:18,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:13:18,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:18,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:18,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:13:18,572 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 20:13:18,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:18,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1552801492, now seen corresponding path program 5 times [2024-06-27 20:13:18,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:18,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585120219] [2024-06-27 20:13:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:18,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:19,565 INFO 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 20:13:19,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:19,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585120219] [2024-06-27 20:13:19,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585120219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:19,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:19,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:19,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572647740] [2024-06-27 20:13:19,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:19,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:19,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:19,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:19,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:19,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 415 transitions, 5055 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:19,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:19,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:19,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:20,995 INFO L124 PetriNetUnfolderBase]: 3640/5440 cut-off events. [2024-06-27 20:13:20,996 INFO L125 PetriNetUnfolderBase]: For 939394/939408 co-relation queries the response was YES. [2024-06-27 20:13:21,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61631 conditions, 5440 events. 3640/5440 cut-off events. For 939394/939408 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 28259 event pairs, 697 based on Foata normal form. 11/5448 useless extension candidates. Maximal degree in co-relation 61511. Up to 4966 conditions per place. [2024-06-27 20:13:21,078 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 358 selfloop transitions, 102 changer transitions 0/464 dead transitions. [2024-06-27 20:13:21,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 464 transitions, 6597 flow [2024-06-27 20:13:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:13:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:13:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-27 20:13:21,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355179704016913 [2024-06-27 20:13:21,079 INFO L175 Difference]: Start difference. First operand has 261 places, 415 transitions, 5055 flow. Second operand 11 states and 206 transitions. [2024-06-27 20:13:21,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 464 transitions, 6597 flow [2024-06-27 20:13:22,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 464 transitions, 6529 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 20:13:22,044 INFO L231 Difference]: Finished difference. Result has 271 places, 426 transitions, 5456 flow [2024-06-27 20:13:22,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4987, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5456, PETRI_PLACES=271, PETRI_TRANSITIONS=426} [2024-06-27 20:13:22,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-27 20:13:22,045 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 426 transitions, 5456 flow [2024-06-27 20:13:22,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:22,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:22,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:22,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:13:22,045 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 20:13:22,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1552801213, now seen corresponding path program 11 times [2024-06-27 20:13:22,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:22,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217574620] [2024-06-27 20:13:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:22,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:22,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217574620] [2024-06-27 20:13:22,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217574620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:22,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:22,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:22,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307922791] [2024-06-27 20:13:22,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:22,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:22,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:22,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:23,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:23,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 426 transitions, 5456 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:23,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:23,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:23,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:24,398 INFO L124 PetriNetUnfolderBase]: 3672/5489 cut-off events. [2024-06-27 20:13:24,398 INFO L125 PetriNetUnfolderBase]: For 970605/970619 co-relation queries the response was YES. [2024-06-27 20:13:24,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63210 conditions, 5489 events. 3672/5489 cut-off events. For 970605/970619 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28534 event pairs, 683 based on Foata normal form. 11/5497 useless extension candidates. Maximal degree in co-relation 63086. Up to 4484 conditions per place. [2024-06-27 20:13:24,460 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 283 selfloop transitions, 188 changer transitions 0/475 dead transitions. [2024-06-27 20:13:24,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 475 transitions, 7092 flow [2024-06-27 20:13:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:13:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:13:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-27 20:13:24,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-27 20:13:24,461 INFO L175 Difference]: Start difference. First operand has 271 places, 426 transitions, 5456 flow. Second operand 12 states and 230 transitions. [2024-06-27 20:13:24,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 475 transitions, 7092 flow [2024-06-27 20:13:25,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 475 transitions, 6721 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:25,390 INFO L231 Difference]: Finished difference. Result has 276 places, 431 transitions, 5724 flow [2024-06-27 20:13:25,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5085, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5724, PETRI_PLACES=276, PETRI_TRANSITIONS=431} [2024-06-27 20:13:25,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-27 20:13:25,391 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 431 transitions, 5724 flow [2024-06-27 20:13:25,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:25,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:25,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:25,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:13:25,391 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 20:13:25,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1304372925, now seen corresponding path program 12 times [2024-06-27 20:13:25,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:25,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040755044] [2024-06-27 20:13:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:25,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:26,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:26,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040755044] [2024-06-27 20:13:26,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040755044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:26,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:26,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:26,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827974146] [2024-06-27 20:13:26,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:26,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:26,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:26,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:26,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:26,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:26,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 431 transitions, 5724 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:26,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:26,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:26,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:27,680 INFO L124 PetriNetUnfolderBase]: 3708/5539 cut-off events. [2024-06-27 20:13:27,681 INFO L125 PetriNetUnfolderBase]: For 1002374/1002388 co-relation queries the response was YES. [2024-06-27 20:13:27,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65056 conditions, 5539 events. 3708/5539 cut-off events. For 1002374/1002388 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28798 event pairs, 685 based on Foata normal form. 11/5547 useless extension candidates. Maximal degree in co-relation 64931. Up to 4572 conditions per place. [2024-06-27 20:13:27,756 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 327 selfloop transitions, 142 changer transitions 0/473 dead transitions. [2024-06-27 20:13:27,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 473 transitions, 7514 flow [2024-06-27 20:13:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 20:13:27,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:13:27,757 INFO L175 Difference]: Start difference. First operand has 276 places, 431 transitions, 5724 flow. Second operand 10 states and 200 transitions. [2024-06-27 20:13:27,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 473 transitions, 7514 flow [2024-06-27 20:13:28,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 473 transitions, 7012 flow, removed 116 selfloop flow, removed 9 redundant places. [2024-06-27 20:13:28,721 INFO L231 Difference]: Finished difference. Result has 277 places, 436 transitions, 5778 flow [2024-06-27 20:13:28,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5222, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5778, PETRI_PLACES=277, PETRI_TRANSITIONS=436} [2024-06-27 20:13:28,721 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-27 20:13:28,721 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 436 transitions, 5778 flow [2024-06-27 20:13:28,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:28,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:28,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:28,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:13:28,721 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 20:13:28,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:28,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1866500722, now seen corresponding path program 6 times [2024-06-27 20:13:28,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:28,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614696434] [2024-06-27 20:13:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:28,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:29,692 INFO 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 20:13:29,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:29,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614696434] [2024-06-27 20:13:29,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614696434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:29,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:29,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:29,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078780352] [2024-06-27 20:13:29,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:29,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:29,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:29,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:29,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:29,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:29,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 436 transitions, 5778 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:29,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:29,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:29,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:31,161 INFO L124 PetriNetUnfolderBase]: 3733/5582 cut-off events. [2024-06-27 20:13:31,161 INFO L125 PetriNetUnfolderBase]: For 1030831/1030845 co-relation queries the response was YES. [2024-06-27 20:13:31,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65882 conditions, 5582 events. 3733/5582 cut-off events. For 1030831/1030845 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 29136 event pairs, 692 based on Foata normal form. 11/5590 useless extension candidates. Maximal degree in co-relation 65756. Up to 4926 conditions per place. [2024-06-27 20:13:31,229 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 326 selfloop transitions, 151 changer transitions 0/481 dead transitions. [2024-06-27 20:13:31,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 481 transitions, 7354 flow [2024-06-27 20:13:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:13:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:13:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 225 transitions. [2024-06-27 20:13:31,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:13:31,230 INFO L175 Difference]: Start difference. First operand has 277 places, 436 transitions, 5778 flow. Second operand 12 states and 225 transitions. [2024-06-27 20:13:31,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 481 transitions, 7354 flow [2024-06-27 20:13:32,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 481 transitions, 6865 flow, removed 121 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:32,049 INFO L231 Difference]: Finished difference. Result has 282 places, 439 transitions, 5811 flow [2024-06-27 20:13:32,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5289, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5811, PETRI_PLACES=282, PETRI_TRANSITIONS=439} [2024-06-27 20:13:32,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-27 20:13:32,050 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 439 transitions, 5811 flow [2024-06-27 20:13:32,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:32,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:32,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:32,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:13:32,050 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 20:13:32,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:32,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1304380365, now seen corresponding path program 13 times [2024-06-27 20:13:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:32,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741432099] [2024-06-27 20:13:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:32,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:32,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:32,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741432099] [2024-06-27 20:13:32,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741432099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:32,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:32,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044467001] [2024-06-27 20:13:32,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:32,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:32,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:32,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:32,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:33,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:33,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 439 transitions, 5811 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:33,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:33,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:33,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:34,406 INFO L124 PetriNetUnfolderBase]: 3751/5604 cut-off events. [2024-06-27 20:13:34,406 INFO L125 PetriNetUnfolderBase]: For 1039852/1039866 co-relation queries the response was YES. [2024-06-27 20:13:34,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66086 conditions, 5604 events. 3751/5604 cut-off events. For 1039852/1039866 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 29184 event pairs, 694 based on Foata normal form. 8/5609 useless extension candidates. Maximal degree in co-relation 65959. Up to 4611 conditions per place. [2024-06-27 20:13:34,477 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 330 selfloop transitions, 150 changer transitions 0/484 dead transitions. [2024-06-27 20:13:34,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 484 transitions, 7631 flow [2024-06-27 20:13:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:13:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:13:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 20:13:34,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-27 20:13:34,478 INFO L175 Difference]: Start difference. First operand has 282 places, 439 transitions, 5811 flow. Second operand 11 states and 217 transitions. [2024-06-27 20:13:34,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 484 transitions, 7631 flow [2024-06-27 20:13:35,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 484 transitions, 7127 flow, removed 105 selfloop flow, removed 10 redundant places. [2024-06-27 20:13:35,738 INFO L231 Difference]: Finished difference. Result has 283 places, 443 transitions, 5868 flow [2024-06-27 20:13:35,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5317, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5868, PETRI_PLACES=283, PETRI_TRANSITIONS=443} [2024-06-27 20:13:35,739 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-27 20:13:35,739 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 443 transitions, 5868 flow [2024-06-27 20:13:35,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:35,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:35,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:35,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:13:35,739 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 20:13:35,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1877551912, now seen corresponding path program 7 times [2024-06-27 20:13:35,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:35,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057376472] [2024-06-27 20:13:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:35,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:36,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:36,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057376472] [2024-06-27 20:13:36,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057376472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:36,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:36,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:36,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918172558] [2024-06-27 20:13:36,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:36,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:36,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:36,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:36,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:36,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:36,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 443 transitions, 5868 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:36,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:36,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:36,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:38,065 INFO L124 PetriNetUnfolderBase]: 3789/5666 cut-off events. [2024-06-27 20:13:38,065 INFO L125 PetriNetUnfolderBase]: For 1062173/1062187 co-relation queries the response was YES. [2024-06-27 20:13:38,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67062 conditions, 5666 events. 3789/5666 cut-off events. For 1062173/1062187 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29679 event pairs, 636 based on Foata normal form. 11/5674 useless extension candidates. Maximal degree in co-relation 66934. Up to 4641 conditions per place. [2024-06-27 20:13:38,137 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 307 selfloop transitions, 176 changer transitions 0/487 dead transitions. [2024-06-27 20:13:38,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 487 transitions, 7960 flow [2024-06-27 20:13:38,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 20:13:38,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:13:38,138 INFO L175 Difference]: Start difference. First operand has 283 places, 443 transitions, 5868 flow. Second operand 10 states and 195 transitions. [2024-06-27 20:13:38,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 487 transitions, 7960 flow [2024-06-27 20:13:39,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 487 transitions, 7459 flow, removed 106 selfloop flow, removed 9 redundant places. [2024-06-27 20:13:39,364 INFO L231 Difference]: Finished difference. Result has 284 places, 449 transitions, 6145 flow [2024-06-27 20:13:39,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6145, PETRI_PLACES=284, PETRI_TRANSITIONS=449} [2024-06-27 20:13:39,364 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-27 20:13:39,364 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 449 transitions, 6145 flow [2024-06-27 20:13:39,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:39,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:39,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:39,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:13:39,365 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 20:13:39,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1552810792, now seen corresponding path program 8 times [2024-06-27 20:13:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:39,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543680039] [2024-06-27 20:13:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:40,295 INFO 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 20:13:40,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:40,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543680039] [2024-06-27 20:13:40,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543680039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:40,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:40,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:40,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322154217] [2024-06-27 20:13:40,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:40,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:40,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:40,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:40,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:40,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:40,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 449 transitions, 6145 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:40,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:40,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:40,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:41,690 INFO L124 PetriNetUnfolderBase]: 3839/5744 cut-off events. [2024-06-27 20:13:41,690 INFO L125 PetriNetUnfolderBase]: For 1090771/1090785 co-relation queries the response was YES. [2024-06-27 20:13:41,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68085 conditions, 5744 events. 3839/5744 cut-off events. For 1090771/1090785 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 30163 event pairs, 705 based on Foata normal form. 11/5752 useless extension candidates. Maximal degree in co-relation 67956. Up to 5210 conditions per place. [2024-06-27 20:13:41,762 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 380 selfloop transitions, 106 changer transitions 0/490 dead transitions. [2024-06-27 20:13:41,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 490 transitions, 7755 flow [2024-06-27 20:13:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 20:13:41,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 20:13:41,763 INFO L175 Difference]: Start difference. First operand has 284 places, 449 transitions, 6145 flow. Second operand 10 states and 192 transitions. [2024-06-27 20:13:41,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 490 transitions, 7755 flow [2024-06-27 20:13:42,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 490 transitions, 7290 flow, removed 139 selfloop flow, removed 6 redundant places. [2024-06-27 20:13:42,972 INFO L231 Difference]: Finished difference. Result has 289 places, 455 transitions, 6148 flow [2024-06-27 20:13:42,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5716, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6148, PETRI_PLACES=289, PETRI_TRANSITIONS=455} [2024-06-27 20:13:42,973 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-27 20:13:42,973 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 455 transitions, 6148 flow [2024-06-27 20:13:42,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:42,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:42,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:42,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:13:42,973 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 20:13:42,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:42,974 INFO L85 PathProgramCache]: Analyzing trace with hash 796040839, now seen corresponding path program 14 times [2024-06-27 20:13:42,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:42,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929690169] [2024-06-27 20:13:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:43,857 INFO 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 20:13:43,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:43,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929690169] [2024-06-27 20:13:43,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929690169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:43,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:43,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:43,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030135789] [2024-06-27 20:13:43,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:43,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:43,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:43,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:43,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:43,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:43,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 455 transitions, 6148 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:43,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:43,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:43,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:45,396 INFO L124 PetriNetUnfolderBase]: 3887/5810 cut-off events. [2024-06-27 20:13:45,397 INFO L125 PetriNetUnfolderBase]: For 1112880/1112894 co-relation queries the response was YES. [2024-06-27 20:13:45,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69375 conditions, 5810 events. 3887/5810 cut-off events. For 1112880/1112894 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 30497 event pairs, 707 based on Foata normal form. 8/5815 useless extension candidates. Maximal degree in co-relation 69243. Up to 4329 conditions per place. [2024-06-27 20:13:45,475 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 210 selfloop transitions, 300 changer transitions 0/514 dead transitions. [2024-06-27 20:13:45,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 514 transitions, 8488 flow [2024-06-27 20:13:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:13:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:13:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 253 transitions. [2024-06-27 20:13:45,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525939177101968 [2024-06-27 20:13:45,476 INFO L175 Difference]: Start difference. First operand has 289 places, 455 transitions, 6148 flow. Second operand 13 states and 253 transitions. [2024-06-27 20:13:45,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 514 transitions, 8488 flow [2024-06-27 20:13:46,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 514 transitions, 8124 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:46,950 INFO L231 Difference]: Finished difference. Result has 296 places, 464 transitions, 7041 flow [2024-06-27 20:13:46,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5784, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7041, PETRI_PLACES=296, PETRI_TRANSITIONS=464} [2024-06-27 20:13:46,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-27 20:13:46,951 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 464 transitions, 7041 flow [2024-06-27 20:13:46,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:46,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:46,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:46,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:13:46,951 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 20:13:46,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:46,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1562937384, now seen corresponding path program 9 times [2024-06-27 20:13:46,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:46,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49283489] [2024-06-27 20:13:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:46,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:47,893 INFO 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 20:13:47,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:47,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49283489] [2024-06-27 20:13:47,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49283489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:47,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:47,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:47,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024855104] [2024-06-27 20:13:47,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:47,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:47,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:47,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:47,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:48,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:48,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 464 transitions, 7041 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:48,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:48,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:48,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:49,363 INFO L124 PetriNetUnfolderBase]: 3912/5846 cut-off events. [2024-06-27 20:13:49,363 INFO L125 PetriNetUnfolderBase]: For 1159504/1159518 co-relation queries the response was YES. [2024-06-27 20:13:49,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72251 conditions, 5846 events. 3912/5846 cut-off events. For 1159504/1159518 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30734 event pairs, 702 based on Foata normal form. 11/5854 useless extension candidates. Maximal degree in co-relation 72117. Up to 5085 conditions per place. [2024-06-27 20:13:49,445 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 342 selfloop transitions, 160 changer transitions 0/506 dead transitions. [2024-06-27 20:13:49,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 506 transitions, 8655 flow [2024-06-27 20:13:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:13:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:13:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 20:13:49,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-27 20:13:49,446 INFO L175 Difference]: Start difference. First operand has 296 places, 464 transitions, 7041 flow. Second operand 11 states and 211 transitions. [2024-06-27 20:13:49,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 506 transitions, 8655 flow [2024-06-27 20:13:50,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 506 transitions, 8120 flow, removed 125 selfloop flow, removed 10 redundant places. [2024-06-27 20:13:50,898 INFO L231 Difference]: Finished difference. Result has 297 places, 467 transitions, 7026 flow [2024-06-27 20:13:50,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7026, PETRI_PLACES=297, PETRI_TRANSITIONS=467} [2024-06-27 20:13:50,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-27 20:13:50,899 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 467 transitions, 7026 flow [2024-06-27 20:13:50,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:50,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:50,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:50,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:13:50,899 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 20:13:50,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:50,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1304380644, now seen corresponding path program 10 times [2024-06-27 20:13:50,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:50,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563474532] [2024-06-27 20:13:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:50,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:51,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:51,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563474532] [2024-06-27 20:13:51,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563474532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:51,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:51,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:51,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109117756] [2024-06-27 20:13:51,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:51,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:51,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:51,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:51,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:51,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:51,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 467 transitions, 7026 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:51,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:51,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:51,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:53,258 INFO L124 PetriNetUnfolderBase]: 3940/5885 cut-off events. [2024-06-27 20:13:53,258 INFO L125 PetriNetUnfolderBase]: For 1180471/1180485 co-relation queries the response was YES. [2024-06-27 20:13:53,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73073 conditions, 5885 events. 3940/5885 cut-off events. For 1180471/1180485 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30867 event pairs, 721 based on Foata normal form. 11/5893 useless extension candidates. Maximal degree in co-relation 72938. Up to 5432 conditions per place. [2024-06-27 20:13:53,339 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 416 selfloop transitions, 85 changer transitions 0/505 dead transitions. [2024-06-27 20:13:53,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 505 transitions, 8806 flow [2024-06-27 20:13:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:13:53,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 20:13:53,340 INFO L175 Difference]: Start difference. First operand has 297 places, 467 transitions, 7026 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:13:53,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 505 transitions, 8806 flow [2024-06-27 20:13:54,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 505 transitions, 8308 flow, removed 93 selfloop flow, removed 9 redundant places. [2024-06-27 20:13:54,686 INFO L231 Difference]: Finished difference. Result has 298 places, 470 transitions, 6906 flow [2024-06-27 20:13:54,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6540, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6906, PETRI_PLACES=298, PETRI_TRANSITIONS=470} [2024-06-27 20:13:54,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-27 20:13:54,687 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 470 transitions, 6906 flow [2024-06-27 20:13:54,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:54,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:54,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:13:54,687 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 20:13:54,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1304649414, now seen corresponding path program 11 times [2024-06-27 20:13:54,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:54,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882691429] [2024-06-27 20:13:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:55,610 INFO 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 20:13:55,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:55,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882691429] [2024-06-27 20:13:55,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882691429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:55,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:55,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491911326] [2024-06-27 20:13:55,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:55,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:55,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:55,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:55,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:55,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:55,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 470 transitions, 6906 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:55,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:55,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:55,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:57,089 INFO L124 PetriNetUnfolderBase]: 3968/5929 cut-off events. [2024-06-27 20:13:57,089 INFO L125 PetriNetUnfolderBase]: For 1182201/1182215 co-relation queries the response was YES. [2024-06-27 20:13:57,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72976 conditions, 5929 events. 3968/5929 cut-off events. For 1182201/1182215 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 31216 event pairs, 715 based on Foata normal form. 11/5937 useless extension candidates. Maximal degree in co-relation 72840. Up to 5335 conditions per place. [2024-06-27 20:13:57,171 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 403 selfloop transitions, 104 changer transitions 0/511 dead transitions. [2024-06-27 20:13:57,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 511 transitions, 9022 flow [2024-06-27 20:13:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 20:13:57,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:13:57,172 INFO L175 Difference]: Start difference. First operand has 298 places, 470 transitions, 6906 flow. Second operand 10 states and 195 transitions. [2024-06-27 20:13:57,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 511 transitions, 9022 flow [2024-06-27 20:13:58,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 511 transitions, 8686 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:58,406 INFO L231 Difference]: Finished difference. Result has 300 places, 473 transitions, 6974 flow [2024-06-27 20:13:58,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6570, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6974, PETRI_PLACES=300, PETRI_TRANSITIONS=473} [2024-06-27 20:13:58,406 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-27 20:13:58,406 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 473 transitions, 6974 flow [2024-06-27 20:13:58,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:58,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:58,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:58,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:13:58,407 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 20:13:58,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash -571539353, now seen corresponding path program 15 times [2024-06-27 20:13:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:58,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897968272] [2024-06-27 20:13:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:58,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:59,348 INFO 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 20:13:59,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:59,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897968272] [2024-06-27 20:13:59,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897968272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:59,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:59,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:59,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974478281] [2024-06-27 20:13:59,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:59,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:59,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:59,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:59,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 473 transitions, 6974 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:59,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:59,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:59,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:00,811 INFO L124 PetriNetUnfolderBase]: 4004/5982 cut-off events. [2024-06-27 20:14:00,811 INFO L125 PetriNetUnfolderBase]: For 1208034/1208048 co-relation queries the response was YES. [2024-06-27 20:14:00,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73942 conditions, 5982 events. 4004/5982 cut-off events. For 1208034/1208048 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 31489 event pairs, 715 based on Foata normal form. 11/5990 useless extension candidates. Maximal degree in co-relation 73805. Up to 5020 conditions per place. [2024-06-27 20:14:00,895 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 372 selfloop transitions, 140 changer transitions 0/516 dead transitions. [2024-06-27 20:14:00,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 516 transitions, 9243 flow [2024-06-27 20:14:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 20:14:00,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 20:14:00,896 INFO L175 Difference]: Start difference. First operand has 300 places, 473 transitions, 6974 flow. Second operand 10 states and 199 transitions. [2024-06-27 20:14:00,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 516 transitions, 9243 flow [2024-06-27 20:14:02,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 516 transitions, 8754 flow, removed 91 selfloop flow, removed 9 redundant places. [2024-06-27 20:14:02,475 INFO L231 Difference]: Finished difference. Result has 301 places, 478 transitions, 7044 flow [2024-06-27 20:14:02,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6485, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7044, PETRI_PLACES=301, PETRI_TRANSITIONS=478} [2024-06-27 20:14:02,476 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-27 20:14:02,476 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 478 transitions, 7044 flow [2024-06-27 20:14:02,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:02,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:02,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:02,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:14:02,476 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 20:14:02,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:02,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1304639835, now seen corresponding path program 16 times [2024-06-27 20:14:02,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:02,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959516097] [2024-06-27 20:14:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:02,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:03,416 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 20:14:03,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:03,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959516097] [2024-06-27 20:14:03,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959516097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:03,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:03,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:03,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442453164] [2024-06-27 20:14:03,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:03,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:03,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:03,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:03,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 478 transitions, 7044 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:03,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:03,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:03,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:04,970 INFO L124 PetriNetUnfolderBase]: 4022/6008 cut-off events. [2024-06-27 20:14:04,970 INFO L125 PetriNetUnfolderBase]: For 1222443/1222457 co-relation queries the response was YES. [2024-06-27 20:14:05,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74174 conditions, 6008 events. 4022/6008 cut-off events. For 1222443/1222457 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 31650 event pairs, 719 based on Foata normal form. 8/6013 useless extension candidates. Maximal degree in co-relation 74037. Up to 4902 conditions per place. [2024-06-27 20:14:05,059 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 350 selfloop transitions, 175 changer transitions 0/529 dead transitions. [2024-06-27 20:14:05,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 529 transitions, 9352 flow [2024-06-27 20:14:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:14:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:14:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-27 20:14:05,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631782945736434 [2024-06-27 20:14:05,060 INFO L175 Difference]: Start difference. First operand has 301 places, 478 transitions, 7044 flow. Second operand 12 states and 239 transitions. [2024-06-27 20:14:05,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 529 transitions, 9352 flow [2024-06-27 20:14:06,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 529 transitions, 8865 flow, removed 117 selfloop flow, removed 7 redundant places. [2024-06-27 20:14:06,665 INFO L231 Difference]: Finished difference. Result has 306 places, 482 transitions, 7163 flow [2024-06-27 20:14:06,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6557, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7163, PETRI_PLACES=306, PETRI_TRANSITIONS=482} [2024-06-27 20:14:06,666 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-27 20:14:06,666 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 482 transitions, 7163 flow [2024-06-27 20:14:06,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:06,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:06,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:06,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:14:06,666 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 20:14:06,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1297223085, now seen corresponding path program 17 times [2024-06-27 20:14:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:06,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124445609] [2024-06-27 20:14:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:06,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:07,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:07,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124445609] [2024-06-27 20:14:07,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124445609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:07,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:07,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:07,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916901660] [2024-06-27 20:14:07,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:07,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:07,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:07,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:07,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:07,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:07,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 482 transitions, 7163 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:07,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:07,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:07,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:09,060 INFO L124 PetriNetUnfolderBase]: 4034/6026 cut-off events. [2024-06-27 20:14:09,060 INFO L125 PetriNetUnfolderBase]: For 1242855/1242869 co-relation queries the response was YES. [2024-06-27 20:14:09,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74124 conditions, 6026 events. 4034/6026 cut-off events. For 1242855/1242869 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31751 event pairs, 715 based on Foata normal form. 11/6034 useless extension candidates. Maximal degree in co-relation 73986. Up to 5064 conditions per place. [2024-06-27 20:14:09,143 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 380 selfloop transitions, 140 changer transitions 0/524 dead transitions. [2024-06-27 20:14:09,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 524 transitions, 9301 flow [2024-06-27 20:14:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 20:14:09,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:14:09,144 INFO L175 Difference]: Start difference. First operand has 306 places, 482 transitions, 7163 flow. Second operand 10 states and 200 transitions. [2024-06-27 20:14:09,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 524 transitions, 9301 flow [2024-06-27 20:14:10,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 524 transitions, 8556 flow, removed 115 selfloop flow, removed 11 redundant places. [2024-06-27 20:14:10,927 INFO L231 Difference]: Finished difference. Result has 305 places, 486 transitions, 6960 flow [2024-06-27 20:14:10,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6440, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6960, PETRI_PLACES=305, PETRI_TRANSITIONS=486} [2024-06-27 20:14:10,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-27 20:14:10,927 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 486 transitions, 6960 flow [2024-06-27 20:14:10,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:10,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:10,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:10,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:14:10,928 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 20:14:10,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:10,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1304640114, now seen corresponding path program 12 times [2024-06-27 20:14:10,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:10,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575458474] [2024-06-27 20:14:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:11,912 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 20:14:11,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:11,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575458474] [2024-06-27 20:14:11,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575458474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:11,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:11,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437691944] [2024-06-27 20:14:11,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:11,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:12,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:12,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 486 transitions, 6960 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:12,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:12,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:12,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:13,462 INFO L124 PetriNetUnfolderBase]: 4062/6069 cut-off events. [2024-06-27 20:14:13,463 INFO L125 PetriNetUnfolderBase]: For 1269111/1269125 co-relation queries the response was YES. [2024-06-27 20:14:13,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74002 conditions, 6069 events. 4062/6069 cut-off events. For 1269111/1269125 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 32079 event pairs, 722 based on Foata normal form. 11/6077 useless extension candidates. Maximal degree in co-relation 73864. Up to 5551 conditions per place. [2024-06-27 20:14:13,690 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 424 selfloop transitions, 100 changer transitions 0/528 dead transitions. [2024-06-27 20:14:13,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 528 transitions, 8814 flow [2024-06-27 20:14:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:14:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:14:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 20:14:13,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:14:13,691 INFO L175 Difference]: Start difference. First operand has 305 places, 486 transitions, 6960 flow. Second operand 11 states and 209 transitions. [2024-06-27 20:14:13,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 528 transitions, 8814 flow [2024-06-27 20:14:15,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 528 transitions, 8339 flow, removed 114 selfloop flow, removed 7 redundant places. [2024-06-27 20:14:15,167 INFO L231 Difference]: Finished difference. Result has 309 places, 489 transitions, 6885 flow [2024-06-27 20:14:15,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6485, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6885, PETRI_PLACES=309, PETRI_TRANSITIONS=489} [2024-06-27 20:14:15,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 20:14:15,168 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 489 transitions, 6885 flow [2024-06-27 20:14:15,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:15,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:15,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:15,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:14:15,168 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 20:14:15,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1297230525, now seen corresponding path program 18 times [2024-06-27 20:14:15,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:15,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764096069] [2024-06-27 20:14:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:15,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:16,115 INFO 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 20:14:16,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:16,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764096069] [2024-06-27 20:14:16,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764096069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:16,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:16,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:16,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41754662] [2024-06-27 20:14:16,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:16,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:16,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:16,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:16,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:16,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 489 transitions, 6885 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:16,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:16,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:16,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:17,737 INFO L124 PetriNetUnfolderBase]: 4056/6062 cut-off events. [2024-06-27 20:14:17,737 INFO L125 PetriNetUnfolderBase]: For 1262065/1262079 co-relation queries the response was YES. [2024-06-27 20:14:17,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72978 conditions, 6062 events. 4056/6062 cut-off events. For 1262065/1262079 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 32008 event pairs, 715 based on Foata normal form. 8/6067 useless extension candidates. Maximal degree in co-relation 72839. Up to 5048 conditions per place. [2024-06-27 20:14:17,816 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 374 selfloop transitions, 153 changer transitions 0/531 dead transitions. [2024-06-27 20:14:17,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 531 transitions, 8819 flow [2024-06-27 20:14:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:14:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:14:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 20:14:17,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-27 20:14:17,817 INFO L175 Difference]: Start difference. First operand has 309 places, 489 transitions, 6885 flow. Second operand 11 states and 219 transitions. [2024-06-27 20:14:17,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 531 transitions, 8819 flow [2024-06-27 20:14:19,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 531 transitions, 8267 flow, removed 180 selfloop flow, removed 9 redundant places. [2024-06-27 20:14:19,569 INFO L231 Difference]: Finished difference. Result has 311 places, 489 transitions, 6662 flow [2024-06-27 20:14:19,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6662, PETRI_PLACES=311, PETRI_TRANSITIONS=489} [2024-06-27 20:14:19,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-27 20:14:19,570 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 489 transitions, 6662 flow [2024-06-27 20:14:19,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:19,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:19,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:19,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:14:19,570 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 20:14:19,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:19,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1297230804, now seen corresponding path program 13 times [2024-06-27 20:14:19,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:19,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068711610] [2024-06-27 20:14:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:19,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:20,578 INFO 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 20:14:20,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:20,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068711610] [2024-06-27 20:14:20,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068711610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:20,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:20,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:20,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165292416] [2024-06-27 20:14:20,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:20,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:20,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:20,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:20,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 489 transitions, 6662 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:20,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:20,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:20,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:22,098 INFO L124 PetriNetUnfolderBase]: 4046/6052 cut-off events. [2024-06-27 20:14:22,098 INFO L125 PetriNetUnfolderBase]: For 1240040/1240054 co-relation queries the response was YES. [2024-06-27 20:14:22,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71883 conditions, 6052 events. 4046/6052 cut-off events. For 1240040/1240054 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 32001 event pairs, 719 based on Foata normal form. 11/6060 useless extension candidates. Maximal degree in co-relation 71743. Up to 5594 conditions per place. [2024-06-27 20:14:22,184 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 437 selfloop transitions, 84 changer transitions 0/525 dead transitions. [2024-06-27 20:14:22,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 525 transitions, 8504 flow [2024-06-27 20:14:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:14:22,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 20:14:22,185 INFO L175 Difference]: Start difference. First operand has 311 places, 489 transitions, 6662 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:14:22,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 525 transitions, 8504 flow [2024-06-27 20:14:23,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 525 transitions, 7988 flow, removed 98 selfloop flow, removed 10 redundant places. [2024-06-27 20:14:23,940 INFO L231 Difference]: Finished difference. Result has 311 places, 489 transitions, 6330 flow [2024-06-27 20:14:23,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6154, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6330, PETRI_PLACES=311, PETRI_TRANSITIONS=489} [2024-06-27 20:14:23,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-27 20:14:23,940 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 489 transitions, 6330 flow [2024-06-27 20:14:23,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:23,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:23,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:23,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:14:23,941 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:23,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1251914436, now seen corresponding path program 3 times [2024-06-27 20:14:23,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:23,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244192677] [2024-06-27 20:14:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:23,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:24,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:24,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244192677] [2024-06-27 20:14:24,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244192677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:24,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:24,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:24,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829823662] [2024-06-27 20:14:24,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:24,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:24,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:24,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:24,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:24,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:24,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 489 transitions, 6330 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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 20:14:24,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:24,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:24,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:25,999 INFO L124 PetriNetUnfolderBase]: 4043/6043 cut-off events. [2024-06-27 20:14:25,999 INFO L125 PetriNetUnfolderBase]: For 1207975/1207989 co-relation queries the response was YES. [2024-06-27 20:14:26,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70757 conditions, 6043 events. 4043/6043 cut-off events. For 1207975/1207989 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 31882 event pairs, 717 based on Foata normal form. 6/6046 useless extension candidates. Maximal degree in co-relation 70616. Up to 5899 conditions per place. [2024-06-27 20:14:26,090 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 469 selfloop transitions, 26 changer transitions 0/499 dead transitions. [2024-06-27 20:14:26,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 499 transitions, 7344 flow [2024-06-27 20:14:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:14:26,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 20:14:26,091 INFO L175 Difference]: Start difference. First operand has 311 places, 489 transitions, 6330 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:14:26,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 499 transitions, 7344 flow [2024-06-27 20:14:27,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 499 transitions, 7136 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 20:14:27,776 INFO L231 Difference]: Finished difference. Result has 309 places, 489 transitions, 6180 flow [2024-06-27 20:14:27,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6122, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6180, PETRI_PLACES=309, PETRI_TRANSITIONS=489} [2024-06-27 20:14:27,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 20:14:27,777 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 489 transitions, 6180 flow [2024-06-27 20:14:27,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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 20:14:27,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:27,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:27,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:14:27,778 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:27,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:27,778 INFO L85 PathProgramCache]: Analyzing trace with hash 226806560, now seen corresponding path program 2 times [2024-06-27 20:14:27,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:27,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464636329] [2024-06-27 20:14:27,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:27,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:28,370 INFO 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 20:14:28,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464636329] [2024-06-27 20:14:28,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464636329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:28,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:28,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353033703] [2024-06-27 20:14:28,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:28,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:28,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:28,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:28,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:28,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:14:28,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 489 transitions, 6180 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:14:28,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:28,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:14:28,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:29,761 INFO L124 PetriNetUnfolderBase]: 3833/5834 cut-off events. [2024-06-27 20:14:29,762 INFO L125 PetriNetUnfolderBase]: For 1215458/1215469 co-relation queries the response was YES. [2024-06-27 20:14:29,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68896 conditions, 5834 events. 3833/5834 cut-off events. For 1215458/1215469 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 31650 event pairs, 710 based on Foata normal form. 9/5840 useless extension candidates. Maximal degree in co-relation 68754. Up to 5367 conditions per place. [2024-06-27 20:14:29,837 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 434 selfloop transitions, 26 changer transitions 0/503 dead transitions. [2024-06-27 20:14:29,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 503 transitions, 7354 flow [2024-06-27 20:14:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:14:29,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:14:29,838 INFO L175 Difference]: Start difference. First operand has 309 places, 489 transitions, 6180 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:14:29,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 503 transitions, 7354 flow [2024-06-27 20:14:31,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 503 transitions, 7278 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:14:31,551 INFO L231 Difference]: Finished difference. Result has 309 places, 492 transitions, 6210 flow [2024-06-27 20:14:31,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6104, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6210, PETRI_PLACES=309, PETRI_TRANSITIONS=492} [2024-06-27 20:14:31,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 20:14:31,551 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 492 transitions, 6210 flow [2024-06-27 20:14:31,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:14:31,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:31,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:31,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:14:31,552 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:31,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:31,552 INFO L85 PathProgramCache]: Analyzing trace with hash 227281790, now seen corresponding path program 3 times [2024-06-27 20:14:31,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:31,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683297436] [2024-06-27 20:14:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:31,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:32,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:32,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683297436] [2024-06-27 20:14:32,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683297436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:32,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:32,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:32,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745035165] [2024-06-27 20:14:32,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:32,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:32,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:32,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:32,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:32,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:14:32,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 492 transitions, 6210 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:14:32,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:32,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:14:32,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:33,529 INFO L124 PetriNetUnfolderBase]: 3830/5830 cut-off events. [2024-06-27 20:14:33,529 INFO L125 PetriNetUnfolderBase]: For 1235118/1235126 co-relation queries the response was YES. [2024-06-27 20:14:33,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69035 conditions, 5830 events. 3830/5830 cut-off events. For 1235118/1235126 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 31628 event pairs, 710 based on Foata normal form. 7/5834 useless extension candidates. Maximal degree in co-relation 68892. Up to 5364 conditions per place. [2024-06-27 20:14:33,608 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 432 selfloop transitions, 27 changer transitions 0/502 dead transitions. [2024-06-27 20:14:33,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 502 transitions, 7152 flow [2024-06-27 20:14:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:14:33,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-27 20:14:33,609 INFO L175 Difference]: Start difference. First operand has 309 places, 492 transitions, 6210 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:14:33,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 502 transitions, 7152 flow [2024-06-27 20:14:35,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 502 transitions, 7042 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:35,439 INFO L231 Difference]: Finished difference. Result has 312 places, 492 transitions, 6160 flow [2024-06-27 20:14:35,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6160, PETRI_PLACES=312, PETRI_TRANSITIONS=492} [2024-06-27 20:14:35,439 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-27 20:14:35,439 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 492 transitions, 6160 flow [2024-06-27 20:14:35,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:14:35,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:35,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:35,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:14:35,440 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:35,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:35,440 INFO L85 PathProgramCache]: Analyzing trace with hash -804790952, now seen corresponding path program 1 times [2024-06-27 20:14:35,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:35,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835779233] [2024-06-27 20:14:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:36,059 INFO 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 20:14:36,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:36,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835779233] [2024-06-27 20:14:36,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835779233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:36,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:36,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:36,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936482387] [2024-06-27 20:14:36,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:36,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:36,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:36,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:36,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:14:36,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 492 transitions, 6160 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 20:14:36,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:36,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:14:36,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:37,280 INFO L124 PetriNetUnfolderBase]: 3655/5665 cut-off events. [2024-06-27 20:14:37,280 INFO L125 PetriNetUnfolderBase]: For 1105795/1105795 co-relation queries the response was YES. [2024-06-27 20:14:37,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64383 conditions, 5665 events. 3655/5665 cut-off events. For 1105795/1105795 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 31601 event pairs, 603 based on Foata normal form. 4/5657 useless extension candidates. Maximal degree in co-relation 64239. Up to 5042 conditions per place. [2024-06-27 20:14:37,358 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 443 selfloop transitions, 28 changer transitions 0/519 dead transitions. [2024-06-27 20:14:37,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 519 transitions, 7474 flow [2024-06-27 20:14:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 20:14:37,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:14:37,359 INFO L175 Difference]: Start difference. First operand has 312 places, 492 transitions, 6160 flow. Second operand 7 states and 140 transitions. [2024-06-27 20:14:37,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 519 transitions, 7474 flow [2024-06-27 20:14:38,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 519 transitions, 7414 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:14:38,970 INFO L231 Difference]: Finished difference. Result has 314 places, 502 transitions, 6301 flow [2024-06-27 20:14:38,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6301, PETRI_PLACES=314, PETRI_TRANSITIONS=502} [2024-06-27 20:14:38,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-27 20:14:38,970 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 502 transitions, 6301 flow [2024-06-27 20:14:38,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 20:14:38,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:38,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:38,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:14:38,971 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:38,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash -902759300, now seen corresponding path program 2 times [2024-06-27 20:14:38,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:38,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135543977] [2024-06-27 20:14:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:38,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:39,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:39,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135543977] [2024-06-27 20:14:39,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135543977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:39,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:39,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:39,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740193670] [2024-06-27 20:14:39,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:39,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:39,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:39,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:14:39,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 502 transitions, 6301 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 20:14:39,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:39,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:14:39,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:40,817 INFO L124 PetriNetUnfolderBase]: 3665/5681 cut-off events. [2024-06-27 20:14:40,818 INFO L125 PetriNetUnfolderBase]: For 1121169/1121169 co-relation queries the response was YES. [2024-06-27 20:14:40,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65379 conditions, 5681 events. 3665/5681 cut-off events. For 1121169/1121169 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31706 event pairs, 604 based on Foata normal form. 2/5671 useless extension candidates. Maximal degree in co-relation 65234. Up to 5112 conditions per place. [2024-06-27 20:14:40,894 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 452 selfloop transitions, 21 changer transitions 0/521 dead transitions. [2024-06-27 20:14:40,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 521 transitions, 7587 flow [2024-06-27 20:14:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:14:40,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 20:14:40,895 INFO L175 Difference]: Start difference. First operand has 314 places, 502 transitions, 6301 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:14:40,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 521 transitions, 7587 flow [2024-06-27 20:14:42,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 521 transitions, 7511 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 20:14:42,992 INFO L231 Difference]: Finished difference. Result has 319 places, 508 transitions, 6399 flow [2024-06-27 20:14:42,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6399, PETRI_PLACES=319, PETRI_TRANSITIONS=508} [2024-06-27 20:14:42,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-27 20:14:42,993 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 508 transitions, 6399 flow [2024-06-27 20:14:42,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 20:14:42,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:42,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:42,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:14:42,993 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:42,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash 227289726, now seen corresponding path program 3 times [2024-06-27 20:14:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:42,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255539971] [2024-06-27 20:14:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:43,611 INFO 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 20:14:43,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:43,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255539971] [2024-06-27 20:14:43,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255539971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:43,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:43,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:43,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958331373] [2024-06-27 20:14:43,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:43,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:43,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:43,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:43,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:14:43,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 508 transitions, 6399 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 20:14:43,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:43,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:14:43,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:44,873 INFO L124 PetriNetUnfolderBase]: 3664/5680 cut-off events. [2024-06-27 20:14:44,873 INFO L125 PetriNetUnfolderBase]: For 1141536/1141536 co-relation queries the response was YES. [2024-06-27 20:14:44,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65446 conditions, 5680 events. 3664/5680 cut-off events. For 1141536/1141536 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 31695 event pairs, 601 based on Foata normal form. 3/5671 useless extension candidates. Maximal degree in co-relation 65298. Up to 5120 conditions per place. [2024-06-27 20:14:44,957 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 455 selfloop transitions, 16 changer transitions 0/519 dead transitions. [2024-06-27 20:14:44,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 519 transitions, 7369 flow [2024-06-27 20:14:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:14:44,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-27 20:14:44,958 INFO L175 Difference]: Start difference. First operand has 319 places, 508 transitions, 6399 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:14:44,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 519 transitions, 7369 flow [2024-06-27 20:14:47,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 519 transitions, 7257 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 20:14:47,224 INFO L231 Difference]: Finished difference. Result has 323 places, 508 transitions, 6326 flow [2024-06-27 20:14:47,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6326, PETRI_PLACES=323, PETRI_TRANSITIONS=508} [2024-06-27 20:14:47,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-27 20:14:47,225 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 508 transitions, 6326 flow [2024-06-27 20:14:47,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 20:14:47,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:47,226 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 20:14:47,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:14:47,226 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 20:14:47,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:47,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1748649711, now seen corresponding path program 1 times [2024-06-27 20:14:47,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:47,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254504460] [2024-06-27 20:14:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:47,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:48,084 INFO 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 20:14:48,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:48,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254504460] [2024-06-27 20:14:48,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254504460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:48,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:48,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:48,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531157479] [2024-06-27 20:14:48,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:48,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:48,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:14:48,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 508 transitions, 6326 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:48,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:48,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:14:48,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:49,752 INFO L124 PetriNetUnfolderBase]: 3983/6012 cut-off events. [2024-06-27 20:14:49,752 INFO L125 PetriNetUnfolderBase]: For 1363104/1363104 co-relation queries the response was YES. [2024-06-27 20:14:49,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72292 conditions, 6012 events. 3983/6012 cut-off events. For 1363104/1363104 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32362 event pairs, 499 based on Foata normal form. 4/6014 useless extension candidates. Maximal degree in co-relation 72143. Up to 5359 conditions per place. [2024-06-27 20:14:49,842 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 425 selfloop transitions, 21 changer transitions 0/555 dead transitions. [2024-06-27 20:14:49,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 555 transitions, 7484 flow [2024-06-27 20:14:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:14:49,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:14:49,845 INFO L175 Difference]: Start difference. First operand has 323 places, 508 transitions, 6326 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:14:49,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 555 transitions, 7484 flow [2024-06-27 20:14:52,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 555 transitions, 7442 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:14:52,733 INFO L231 Difference]: Finished difference. Result has 327 places, 510 transitions, 6489 flow [2024-06-27 20:14:52,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6284, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6489, PETRI_PLACES=327, PETRI_TRANSITIONS=510} [2024-06-27 20:14:52,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-27 20:14:52,733 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 510 transitions, 6489 flow [2024-06-27 20:14:52,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:52,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:52,733 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 20:14:52,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:14:52,734 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 20:14:52,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1432330329, now seen corresponding path program 2 times [2024-06-27 20:14:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:52,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120301931] [2024-06-27 20:14:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:53,618 INFO 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 20:14:53,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:53,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120301931] [2024-06-27 20:14:53,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120301931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:53,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:53,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:53,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365647915] [2024-06-27 20:14:53,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:53,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:53,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:53,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:53,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:14:53,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 510 transitions, 6489 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:53,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:53,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:14:53,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:55,202 INFO L124 PetriNetUnfolderBase]: 4000/6039 cut-off events. [2024-06-27 20:14:55,203 INFO L125 PetriNetUnfolderBase]: For 1400004/1400004 co-relation queries the response was YES. [2024-06-27 20:14:55,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73285 conditions, 6039 events. 4000/6039 cut-off events. For 1400004/1400004 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32516 event pairs, 624 based on Foata normal form. 4/6041 useless extension candidates. Maximal degree in co-relation 73135. Up to 5412 conditions per place. [2024-06-27 20:14:55,299 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 425 selfloop transitions, 22 changer transitions 0/556 dead transitions. [2024-06-27 20:14:55,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 556 transitions, 7651 flow [2024-06-27 20:14:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:14:55,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:14:55,300 INFO L175 Difference]: Start difference. First operand has 327 places, 510 transitions, 6489 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:14:55,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 556 transitions, 7651 flow [2024-06-27 20:14:57,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 556 transitions, 7464 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-27 20:14:57,628 INFO L231 Difference]: Finished difference. Result has 329 places, 512 transitions, 6513 flow [2024-06-27 20:14:57,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6513, PETRI_PLACES=329, PETRI_TRANSITIONS=512} [2024-06-27 20:14:57,629 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 20:14:57,629 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 512 transitions, 6513 flow [2024-06-27 20:14:57,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:57,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:57,629 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 20:14:57,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:14:57,629 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:57,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:57,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1751511631, now seen corresponding path program 1 times [2024-06-27 20:14:57,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:57,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810020599] [2024-06-27 20:14:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:57,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:58,798 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 20:14:58,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:58,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810020599] [2024-06-27 20:14:58,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810020599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:58,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:58,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:14:58,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490504912] [2024-06-27 20:14:58,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:58,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:14:58,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:58,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:14:58,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:14:58,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:58,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 512 transitions, 6513 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:58,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:58,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:58,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:00,595 INFO L124 PetriNetUnfolderBase]: 4149/6201 cut-off events. [2024-06-27 20:15:00,596 INFO L125 PetriNetUnfolderBase]: For 1437091/1437091 co-relation queries the response was YES. [2024-06-27 20:15:00,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74849 conditions, 6201 events. 4149/6201 cut-off events. For 1437091/1437091 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32930 event pairs, 630 based on Foata normal form. 3/6202 useless extension candidates. Maximal degree in co-relation 74698. Up to 5962 conditions per place. [2024-06-27 20:15:00,682 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 512 selfloop transitions, 50 changer transitions 0/566 dead transitions. [2024-06-27 20:15:00,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 566 transitions, 8603 flow [2024-06-27 20:15:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:15:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:15:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 20:15:00,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-27 20:15:00,683 INFO L175 Difference]: Start difference. First operand has 329 places, 512 transitions, 6513 flow. Second operand 11 states and 213 transitions. [2024-06-27 20:15:00,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 566 transitions, 8603 flow [2024-06-27 20:15:02,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 566 transitions, 8410 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-27 20:15:02,519 INFO L231 Difference]: Finished difference. Result has 332 places, 516 transitions, 6695 flow [2024-06-27 20:15:02,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6695, PETRI_PLACES=332, PETRI_TRANSITIONS=516} [2024-06-27 20:15:02,519 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-27 20:15:02,519 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 516 transitions, 6695 flow [2024-06-27 20:15:02,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:02,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:02,519 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 20:15:02,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:15:02,519 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:02,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:02,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1866797841, now seen corresponding path program 3 times [2024-06-27 20:15:02,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:02,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045199288] [2024-06-27 20:15:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:02,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:03,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:03,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045199288] [2024-06-27 20:15:03,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045199288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:03,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:03,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:15:03,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751821880] [2024-06-27 20:15:03,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:03,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:15:03,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:03,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:15:03,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:15:03,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:15:03,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 516 transitions, 6695 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:03,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:03,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:15:03,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:05,060 INFO L124 PetriNetUnfolderBase]: 4035/6095 cut-off events. [2024-06-27 20:15:05,060 INFO L125 PetriNetUnfolderBase]: For 1474890/1474890 co-relation queries the response was YES. [2024-06-27 20:15:05,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74773 conditions, 6095 events. 4035/6095 cut-off events. For 1474890/1474890 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 32878 event pairs, 599 based on Foata normal form. 4/6097 useless extension candidates. Maximal degree in co-relation 74621. Up to 5468 conditions per place. [2024-06-27 20:15:05,152 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 429 selfloop transitions, 22 changer transitions 0/561 dead transitions. [2024-06-27 20:15:05,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 561 transitions, 7881 flow [2024-06-27 20:15:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:15:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:15:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:15:05,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 20:15:05,153 INFO L175 Difference]: Start difference. First operand has 332 places, 516 transitions, 6695 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:15:05,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 561 transitions, 7881 flow [2024-06-27 20:15:07,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 561 transitions, 7536 flow, removed 125 selfloop flow, removed 9 redundant places. [2024-06-27 20:15:07,550 INFO L231 Difference]: Finished difference. Result has 334 places, 520 transitions, 6591 flow [2024-06-27 20:15:07,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6591, PETRI_PLACES=334, PETRI_TRANSITIONS=520} [2024-06-27 20:15:07,550 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-27 20:15:07,550 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 520 transitions, 6591 flow [2024-06-27 20:15:07,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:07,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:07,551 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 20:15:07,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:15:07,551 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:07,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:07,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1866982291, now seen corresponding path program 2 times [2024-06-27 20:15:07,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:07,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270347743] [2024-06-27 20:15:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:07,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:08,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:08,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270347743] [2024-06-27 20:15:08,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270347743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:08,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:08,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:08,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507936136] [2024-06-27 20:15:08,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:08,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:08,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:08,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:08,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:08,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:15:08,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 520 transitions, 6591 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:08,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:08,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:15:08,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:10,431 INFO L124 PetriNetUnfolderBase]: 4202/6294 cut-off events. [2024-06-27 20:15:10,431 INFO L125 PetriNetUnfolderBase]: For 1508526/1508526 co-relation queries the response was YES. [2024-06-27 20:15:10,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76400 conditions, 6294 events. 4202/6294 cut-off events. For 1508526/1508526 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 33605 event pairs, 627 based on Foata normal form. 3/6295 useless extension candidates. Maximal degree in co-relation 76246. Up to 5978 conditions per place. [2024-06-27 20:15:10,526 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 514 selfloop transitions, 62 changer transitions 0/580 dead transitions. [2024-06-27 20:15:10,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 580 transitions, 8596 flow [2024-06-27 20:15:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:15:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:15:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 229 transitions. [2024-06-27 20:15:10,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437984496124031 [2024-06-27 20:15:10,528 INFO L175 Difference]: Start difference. First operand has 334 places, 520 transitions, 6591 flow. Second operand 12 states and 229 transitions. [2024-06-27 20:15:10,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 580 transitions, 8596 flow [2024-06-27 20:15:12,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 580 transitions, 8389 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-27 20:15:12,829 INFO L231 Difference]: Finished difference. Result has 340 places, 529 transitions, 6854 flow [2024-06-27 20:15:12,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6384, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6854, PETRI_PLACES=340, PETRI_TRANSITIONS=529} [2024-06-27 20:15:12,830 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-27 20:15:12,830 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 529 transitions, 6854 flow [2024-06-27 20:15:12,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:12,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:12,830 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 20:15:12,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:15:12,831 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:12,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:12,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1866982539, now seen corresponding path program 1 times [2024-06-27 20:15:12,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:12,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483099532] [2024-06-27 20:15:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:12,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:13,802 INFO 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 20:15:13,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:13,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483099532] [2024-06-27 20:15:13,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483099532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:13,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:13,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:13,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442924456] [2024-06-27 20:15:13,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:13,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:13,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:13,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:13,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:15:13,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 529 transitions, 6854 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:13,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:13,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:15:13,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:15,799 INFO L124 PetriNetUnfolderBase]: 4354/6542 cut-off events. [2024-06-27 20:15:15,799 INFO L125 PetriNetUnfolderBase]: For 1744964/1744964 co-relation queries the response was YES. [2024-06-27 20:15:15,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81011 conditions, 6542 events. 4354/6542 cut-off events. For 1744964/1744964 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 35407 event pairs, 639 based on Foata normal form. 36/6576 useless extension candidates. Maximal degree in co-relation 80855. Up to 6027 conditions per place. [2024-06-27 20:15:15,893 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 520 selfloop transitions, 60 changer transitions 0/584 dead transitions. [2024-06-27 20:15:15,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 584 transitions, 8866 flow [2024-06-27 20:15:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:15:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:15:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 20:15:15,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-27 20:15:15,894 INFO L175 Difference]: Start difference. First operand has 340 places, 529 transitions, 6854 flow. Second operand 11 states and 216 transitions. [2024-06-27 20:15:15,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 584 transitions, 8866 flow [2024-06-27 20:15:17,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 584 transitions, 8483 flow, removed 133 selfloop flow, removed 9 redundant places. [2024-06-27 20:15:18,000 INFO L231 Difference]: Finished difference. Result has 342 places, 532 transitions, 6826 flow [2024-06-27 20:15:18,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6826, PETRI_PLACES=342, PETRI_TRANSITIONS=532} [2024-06-27 20:15:18,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-27 20:15:18,000 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 532 transitions, 6826 flow [2024-06-27 20:15:18,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:18,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:18,001 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 20:15:18,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:15:18,001 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:18,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1713260633, now seen corresponding path program 4 times [2024-06-27 20:15:18,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:18,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307953566] [2024-06-27 20:15:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:18,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:18,912 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 20:15:18,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:18,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307953566] [2024-06-27 20:15:18,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307953566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:18,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:18,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:15:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622046491] [2024-06-27 20:15:18,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:18,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:15:18,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:18,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:15:18,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:15:19,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:15:19,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 532 transitions, 6826 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:19,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:19,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:15:19,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:20,726 INFO L124 PetriNetUnfolderBase]: 4226/6422 cut-off events. [2024-06-27 20:15:20,726 INFO L125 PetriNetUnfolderBase]: For 1625047/1625047 co-relation queries the response was YES. [2024-06-27 20:15:20,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80151 conditions, 6422 events. 4226/6422 cut-off events. For 1625047/1625047 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35484 event pairs, 618 based on Foata normal form. 4/6424 useless extension candidates. Maximal degree in co-relation 79994. Up to 5727 conditions per place. [2024-06-27 20:15:20,825 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 29 changer transitions 0/574 dead transitions. [2024-06-27 20:15:20,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 574 transitions, 8034 flow [2024-06-27 20:15:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:15:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:15:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:15:20,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 20:15:20,826 INFO L175 Difference]: Start difference. First operand has 342 places, 532 transitions, 6826 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:15:20,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 574 transitions, 8034 flow [2024-06-27 20:15:22,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 574 transitions, 7839 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-27 20:15:22,998 INFO L231 Difference]: Finished difference. Result has 344 places, 536 transitions, 6896 flow [2024-06-27 20:15:22,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6631, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6896, PETRI_PLACES=344, PETRI_TRANSITIONS=536} [2024-06-27 20:15:22,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 20:15:22,999 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 536 transitions, 6896 flow [2024-06-27 20:15:22,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:22,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:22,999 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 20:15:22,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:15:22,999 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 20:15:22,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:22,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1719701193, now seen corresponding path program 3 times [2024-06-27 20:15:22,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:22,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194692211] [2024-06-27 20:15:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:22,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:23,979 INFO 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 20:15:23,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:23,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194692211] [2024-06-27 20:15:23,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194692211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:23,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:23,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:23,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223359854] [2024-06-27 20:15:23,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:23,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:23,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:23,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:24,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:15:24,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 536 transitions, 6896 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:24,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:24,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:15:24,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:25,904 INFO L124 PetriNetUnfolderBase]: 4389/6606 cut-off events. [2024-06-27 20:15:25,904 INFO L125 PetriNetUnfolderBase]: For 1632855/1632855 co-relation queries the response was YES. [2024-06-27 20:15:25,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81604 conditions, 6606 events. 4389/6606 cut-off events. For 1632855/1632855 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 36018 event pairs, 628 based on Foata normal form. 3/6607 useless extension candidates. Maximal degree in co-relation 81445. Up to 6086 conditions per place. [2024-06-27 20:15:26,023 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 478 selfloop transitions, 102 changer transitions 0/584 dead transitions. [2024-06-27 20:15:26,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 584 transitions, 8862 flow [2024-06-27 20:15:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:15:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:15:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:15:26,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:15:26,024 INFO L175 Difference]: Start difference. First operand has 344 places, 536 transitions, 6896 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:15:26,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 584 transitions, 8862 flow [2024-06-27 20:15:28,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 584 transitions, 8631 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-27 20:15:28,861 INFO L231 Difference]: Finished difference. Result has 348 places, 540 transitions, 7168 flow [2024-06-27 20:15:28,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6665, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7168, PETRI_PLACES=348, PETRI_TRANSITIONS=540} [2024-06-27 20:15:28,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-27 20:15:28,861 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 540 transitions, 7168 flow [2024-06-27 20:15:28,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:28,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:28,861 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 20:15:28,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:15:28,862 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 20:15:28,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:28,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2038877783, now seen corresponding path program 2 times [2024-06-27 20:15:28,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:28,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498391592] [2024-06-27 20:15:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:28,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:29,971 INFO 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 20:15:29,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:29,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498391592] [2024-06-27 20:15:29,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498391592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:29,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:29,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:29,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289492904] [2024-06-27 20:15:29,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:29,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:29,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:29,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:29,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:30,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:15:30,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 540 transitions, 7168 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:30,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:30,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:15:30,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:31,940 INFO L124 PetriNetUnfolderBase]: 4541/6854 cut-off events. [2024-06-27 20:15:31,940 INFO L125 PetriNetUnfolderBase]: For 1880717/1880717 co-relation queries the response was YES. [2024-06-27 20:15:32,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86519 conditions, 6854 events. 4541/6854 cut-off events. For 1880717/1880717 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37775 event pairs, 659 based on Foata normal form. 36/6888 useless extension candidates. Maximal degree in co-relation 86359. Up to 6198 conditions per place. [2024-06-27 20:15:32,060 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 500 selfloop transitions, 88 changer transitions 0/592 dead transitions. [2024-06-27 20:15:32,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 592 transitions, 9208 flow [2024-06-27 20:15:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:15:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:15:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 20:15:32,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-27 20:15:32,061 INFO L175 Difference]: Start difference. First operand has 348 places, 540 transitions, 7168 flow. Second operand 11 states and 217 transitions. [2024-06-27 20:15:32,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 592 transitions, 9208 flow [2024-06-27 20:15:34,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 592 transitions, 8735 flow, removed 137 selfloop flow, removed 9 redundant places. [2024-06-27 20:15:34,359 INFO L231 Difference]: Finished difference. Result has 350 places, 543 transitions, 7117 flow [2024-06-27 20:15:34,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6695, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7117, PETRI_PLACES=350, PETRI_TRANSITIONS=543} [2024-06-27 20:15:34,359 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-27 20:15:34,359 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 543 transitions, 7117 flow [2024-06-27 20:15:34,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:34,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:34,360 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 20:15:34,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:15:34,360 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 20:15:34,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2032621425, now seen corresponding path program 4 times [2024-06-27 20:15:34,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:34,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496866900] [2024-06-27 20:15:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:34,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:35,436 INFO 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 20:15:35,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:35,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496866900] [2024-06-27 20:15:35,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496866900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:35,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:35,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:35,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154598102] [2024-06-27 20:15:35,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:35,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:35,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:35,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:15:35,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 543 transitions, 7117 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:35,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:35,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:15:35,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:37,508 INFO L124 PetriNetUnfolderBase]: 4577/6917 cut-off events. [2024-06-27 20:15:37,508 INFO L125 PetriNetUnfolderBase]: For 1764496/1764496 co-relation queries the response was YES. [2024-06-27 20:15:37,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87450 conditions, 6917 events. 4577/6917 cut-off events. For 1764496/1764496 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 38411 event pairs, 656 based on Foata normal form. 3/6918 useless extension candidates. Maximal degree in co-relation 87289. Up to 6426 conditions per place. [2024-06-27 20:15:37,620 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 513 selfloop transitions, 84 changer transitions 0/601 dead transitions. [2024-06-27 20:15:37,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 601 transitions, 9424 flow [2024-06-27 20:15:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:15:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:15:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 231 transitions. [2024-06-27 20:15:37,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 20:15:37,621 INFO L175 Difference]: Start difference. First operand has 350 places, 543 transitions, 7117 flow. Second operand 12 states and 231 transitions. [2024-06-27 20:15:37,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 601 transitions, 9424 flow [2024-06-27 20:15:40,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 601 transitions, 9156 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-27 20:15:40,420 INFO L231 Difference]: Finished difference. Result has 354 places, 552 transitions, 7399 flow [2024-06-27 20:15:40,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6857, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7399, PETRI_PLACES=354, PETRI_TRANSITIONS=552} [2024-06-27 20:15:40,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-27 20:15:40,420 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 552 transitions, 7399 flow [2024-06-27 20:15:40,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:40,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:40,420 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 20:15:40,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:15:40,420 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 20:15:40,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2039116793, now seen corresponding path program 3 times [2024-06-27 20:15:40,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:40,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014371706] [2024-06-27 20:15:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:40,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:41,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:41,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014371706] [2024-06-27 20:15:41,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014371706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:41,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:41,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:41,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074386920] [2024-06-27 20:15:41,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:41,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:41,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:41,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:41,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:41,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:15:41,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 552 transitions, 7399 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:41,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:41,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:15:41,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:43,424 INFO L124 PetriNetUnfolderBase]: 4643/7019 cut-off events. [2024-06-27 20:15:43,424 INFO L125 PetriNetUnfolderBase]: For 1830001/1830001 co-relation queries the response was YES. [2024-06-27 20:15:43,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89466 conditions, 7019 events. 4643/7019 cut-off events. For 1830001/1830001 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 39123 event pairs, 654 based on Foata normal form. 6/7023 useless extension candidates. Maximal degree in co-relation 89303. Up to 6473 conditions per place. [2024-06-27 20:15:43,553 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 523 selfloop transitions, 91 changer transitions 0/618 dead transitions. [2024-06-27 20:15:43,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 618 transitions, 10356 flow [2024-06-27 20:15:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:15:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:15:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 20:15:43,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-27 20:15:43,554 INFO L175 Difference]: Start difference. First operand has 354 places, 552 transitions, 7399 flow. Second operand 11 states and 213 transitions. [2024-06-27 20:15:43,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 618 transitions, 10356 flow [2024-06-27 20:15:46,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 618 transitions, 9895 flow, removed 147 selfloop flow, removed 9 redundant places. [2024-06-27 20:15:46,165 INFO L231 Difference]: Finished difference. Result has 358 places, 571 transitions, 8003 flow [2024-06-27 20:15:46,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8003, PETRI_PLACES=358, PETRI_TRANSITIONS=571} [2024-06-27 20:15:46,165 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-27 20:15:46,165 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 571 transitions, 8003 flow [2024-06-27 20:15:46,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:46,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:46,165 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 20:15:46,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:15:46,166 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:46,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2039108175, now seen corresponding path program 5 times [2024-06-27 20:15:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:46,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028210710] [2024-06-27 20:15:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:46,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:47,196 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 20:15:47,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:47,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028210710] [2024-06-27 20:15:47,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028210710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:47,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:47,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682577402] [2024-06-27 20:15:47,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:47,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:47,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:47,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:47,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:47,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:15:47,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 571 transitions, 8003 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:47,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:47,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:15:47,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:49,261 INFO L124 PetriNetUnfolderBase]: 4661/7053 cut-off events. [2024-06-27 20:15:49,262 INFO L125 PetriNetUnfolderBase]: For 1847108/1847108 co-relation queries the response was YES. [2024-06-27 20:15:49,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90567 conditions, 7053 events. 4661/7053 cut-off events. For 1847108/1847108 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39433 event pairs, 660 based on Foata normal form. 3/7054 useless extension candidates. Maximal degree in co-relation 90401. Up to 6361 conditions per place. [2024-06-27 20:15:49,369 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 469 selfloop transitions, 145 changer transitions 0/618 dead transitions. [2024-06-27 20:15:49,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 618 transitions, 10069 flow [2024-06-27 20:15:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:15:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:15:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:15:49,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:15:49,370 INFO L175 Difference]: Start difference. First operand has 358 places, 571 transitions, 8003 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:15:49,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 618 transitions, 10069 flow [2024-06-27 20:15:52,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 618 transitions, 9615 flow, removed 172 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:52,483 INFO L231 Difference]: Finished difference. Result has 363 places, 575 transitions, 8162 flow [2024-06-27 20:15:52,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8162, PETRI_PLACES=363, PETRI_TRANSITIONS=575} [2024-06-27 20:15:52,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-27 20:15:52,484 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 575 transitions, 8162 flow [2024-06-27 20:15:52,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:52,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:52,484 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 20:15:52,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:15:52,484 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 20:15:52,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:52,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1713445331, now seen corresponding path program 4 times [2024-06-27 20:15:52,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:52,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364790689] [2024-06-27 20:15:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:52,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:53,599 INFO 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 20:15:53,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:53,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364790689] [2024-06-27 20:15:53,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364790689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:53,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:53,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:53,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437769940] [2024-06-27 20:15:53,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:53,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:53,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:53,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:53,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:15:53,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 575 transitions, 8162 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:53,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:53,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:15:53,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:55,745 INFO L124 PetriNetUnfolderBase]: 4813/7301 cut-off events. [2024-06-27 20:15:55,745 INFO L125 PetriNetUnfolderBase]: For 2108286/2108286 co-relation queries the response was YES. [2024-06-27 20:15:55,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95357 conditions, 7301 events. 4813/7301 cut-off events. For 2108286/2108286 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41320 event pairs, 681 based on Foata normal form. 36/7335 useless extension candidates. Maximal degree in co-relation 95189. Up to 6603 conditions per place. [2024-06-27 20:15:55,871 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 539 selfloop transitions, 87 changer transitions 0/630 dead transitions. [2024-06-27 20:15:55,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 630 transitions, 10730 flow [2024-06-27 20:15:55,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:15:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:15:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-27 20:15:55,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-27 20:15:55,872 INFO L175 Difference]: Start difference. First operand has 363 places, 575 transitions, 8162 flow. Second operand 11 states and 218 transitions. [2024-06-27 20:15:55,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 630 transitions, 10730 flow [2024-06-27 20:15:58,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 630 transitions, 10129 flow, removed 153 selfloop flow, removed 9 redundant places. [2024-06-27 20:15:58,831 INFO L231 Difference]: Finished difference. Result has 365 places, 580 transitions, 8190 flow [2024-06-27 20:15:58,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7561, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8190, PETRI_PLACES=365, PETRI_TRANSITIONS=580} [2024-06-27 20:15:58,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-27 20:15:58,832 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 580 transitions, 8190 flow [2024-06-27 20:15:58,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:58,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:58,833 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 20:15:58,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:15:58,833 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 20:15:58,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2039108423, now seen corresponding path program 5 times [2024-06-27 20:15:58,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:58,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74982356] [2024-06-27 20:15:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:58,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:59,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:59,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74982356] [2024-06-27 20:15:59,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74982356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:59,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:59,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:59,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284042318] [2024-06-27 20:15:59,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:59,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:59,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:59,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:59,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:15:59,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 580 transitions, 8190 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:59,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:59,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:15:59,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:02,003 INFO L124 PetriNetUnfolderBase]: 4803/7287 cut-off events. [2024-06-27 20:16:02,003 INFO L125 PetriNetUnfolderBase]: For 1950429/1950429 co-relation queries the response was YES. [2024-06-27 20:16:02,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94235 conditions, 7287 events. 4803/7287 cut-off events. For 1950429/1950429 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41208 event pairs, 683 based on Foata normal form. 6/7291 useless extension candidates. Maximal degree in co-relation 94066. Up to 6861 conditions per place. [2024-06-27 20:16:02,129 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 540 selfloop transitions, 80 changer transitions 0/624 dead transitions. [2024-06-27 20:16:02,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 624 transitions, 9972 flow [2024-06-27 20:16:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:16:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:16:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 20:16:02,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-27 20:16:02,130 INFO L175 Difference]: Start difference. First operand has 365 places, 580 transitions, 8190 flow. Second operand 11 states and 210 transitions. [2024-06-27 20:16:02,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 624 transitions, 9972 flow [2024-06-27 20:16:05,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 624 transitions, 9156 flow, removed 326 selfloop flow, removed 9 redundant places. [2024-06-27 20:16:05,385 INFO L231 Difference]: Finished difference. Result has 367 places, 580 transitions, 7542 flow [2024-06-27 20:16:05,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7374, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7542, PETRI_PLACES=367, PETRI_TRANSITIONS=580} [2024-06-27 20:16:05,385 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-27 20:16:05,385 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 580 transitions, 7542 flow [2024-06-27 20:16:05,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:05,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:05,385 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 20:16:05,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:16:05,386 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:05,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:05,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2070715785, now seen corresponding path program 1 times [2024-06-27 20:16:05,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:05,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66608353] [2024-06-27 20:16:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:05,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:06,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:06,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66608353] [2024-06-27 20:16:06,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66608353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:06,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:06,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:06,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616522762] [2024-06-27 20:16:06,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:06,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:06,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:06,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:06,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:06,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:16:06,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 580 transitions, 7542 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:06,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:06,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:16:06,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:08,117 INFO L124 PetriNetUnfolderBase]: 4813/7303 cut-off events. [2024-06-27 20:16:08,117 INFO L125 PetriNetUnfolderBase]: For 1900470/1900470 co-relation queries the response was YES. [2024-06-27 20:16:08,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92009 conditions, 7303 events. 4813/7303 cut-off events. For 1900470/1900470 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41407 event pairs, 686 based on Foata normal form. 2/7303 useless extension candidates. Maximal degree in co-relation 91839. Up to 7060 conditions per place. [2024-06-27 20:16:08,244 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 571 selfloop transitions, 41 changer transitions 0/616 dead transitions. [2024-06-27 20:16:08,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 616 transitions, 9191 flow [2024-06-27 20:16:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:16:08,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 20:16:08,245 INFO L175 Difference]: Start difference. First operand has 367 places, 580 transitions, 7542 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:16:08,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 616 transitions, 9191 flow [2024-06-27 20:16:11,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 616 transitions, 9026 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 20:16:11,638 INFO L231 Difference]: Finished difference. Result has 367 places, 585 transitions, 7585 flow [2024-06-27 20:16:11,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7382, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7585, PETRI_PLACES=367, PETRI_TRANSITIONS=585} [2024-06-27 20:16:11,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-27 20:16:11,638 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 585 transitions, 7585 flow [2024-06-27 20:16:11,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:11,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:11,638 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 20:16:11,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:16:11,638 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:11,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2071044075, now seen corresponding path program 2 times [2024-06-27 20:16:11,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:11,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779643447] [2024-06-27 20:16:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:11,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:12,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:12,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779643447] [2024-06-27 20:16:12,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779643447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:12,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:12,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:12,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251864634] [2024-06-27 20:16:12,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:12,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:12,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:12,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:12,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:12,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:16:12,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 585 transitions, 7585 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:12,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:12,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:16:12,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:14,578 INFO L124 PetriNetUnfolderBase]: 4823/7319 cut-off events. [2024-06-27 20:16:14,578 INFO L125 PetriNetUnfolderBase]: For 1929419/1929419 co-relation queries the response was YES. [2024-06-27 20:16:14,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92165 conditions, 7319 events. 4823/7319 cut-off events. For 1929419/1929419 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41478 event pairs, 686 based on Foata normal form. 2/7319 useless extension candidates. Maximal degree in co-relation 91994. Up to 7070 conditions per place. [2024-06-27 20:16:14,703 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 568 selfloop transitions, 44 changer transitions 0/616 dead transitions. [2024-06-27 20:16:14,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 616 transitions, 9239 flow [2024-06-27 20:16:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:16:14,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 20:16:14,704 INFO L175 Difference]: Start difference. First operand has 367 places, 585 transitions, 7585 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:16:14,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 616 transitions, 9239 flow [2024-06-27 20:16:17,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 616 transitions, 9103 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:17,827 INFO L231 Difference]: Finished difference. Result has 370 places, 590 transitions, 7667 flow [2024-06-27 20:16:17,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7454, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7667, PETRI_PLACES=370, PETRI_TRANSITIONS=590} [2024-06-27 20:16:17,828 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-27 20:16:17,828 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 590 transitions, 7667 flow [2024-06-27 20:16:17,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:17,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:17,828 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 20:16:17,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:16:17,828 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:17,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2071044478, now seen corresponding path program 1 times [2024-06-27 20:16:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:17,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134404277] [2024-06-27 20:16:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:18,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:18,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134404277] [2024-06-27 20:16:18,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134404277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:18,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:18,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:18,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515982568] [2024-06-27 20:16:18,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:18,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:18,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:18,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:18,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:16:18,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 590 transitions, 7667 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:18,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:18,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:16:18,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:20,628 INFO L124 PetriNetUnfolderBase]: 4828/7326 cut-off events. [2024-06-27 20:16:20,629 INFO L125 PetriNetUnfolderBase]: For 1943102/1943102 co-relation queries the response was YES. [2024-06-27 20:16:20,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92453 conditions, 7326 events. 4828/7326 cut-off events. For 1943102/1943102 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41525 event pairs, 686 based on Foata normal form. 1/7325 useless extension candidates. Maximal degree in co-relation 92281. Up to 7105 conditions per place. [2024-06-27 20:16:20,746 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 576 selfloop transitions, 40 changer transitions 0/620 dead transitions. [2024-06-27 20:16:20,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 620 transitions, 9289 flow [2024-06-27 20:16:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:16:20,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 20:16:20,748 INFO L175 Difference]: Start difference. First operand has 370 places, 590 transitions, 7667 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:16:20,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 620 transitions, 9289 flow [2024-06-27 20:16:24,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 620 transitions, 9156 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:24,175 INFO L231 Difference]: Finished difference. Result has 373 places, 596 transitions, 7734 flow [2024-06-27 20:16:24,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7534, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7734, PETRI_PLACES=373, PETRI_TRANSITIONS=596} [2024-06-27 20:16:24,176 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-27 20:16:24,176 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 596 transitions, 7734 flow [2024-06-27 20:16:24,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:24,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:24,176 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 20:16:24,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:16:24,176 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:24,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:24,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2076435657, now seen corresponding path program 1 times [2024-06-27 20:16:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:24,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601554304] [2024-06-27 20:16:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:24,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:24,756 INFO 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 20:16:24,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:24,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601554304] [2024-06-27 20:16:24,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601554304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:24,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:24,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:24,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204778531] [2024-06-27 20:16:24,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:24,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:24,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:24,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:24,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:24,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:16:24,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 596 transitions, 7734 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:16:24,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:24,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:16:24,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:26,675 INFO L124 PetriNetUnfolderBase]: 4619/7110 cut-off events. [2024-06-27 20:16:26,676 INFO L125 PetriNetUnfolderBase]: For 1970155/1970155 co-relation queries the response was YES. [2024-06-27 20:16:26,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91218 conditions, 7110 events. 4619/7110 cut-off events. For 1970155/1970155 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41179 event pairs, 675 based on Foata normal form. 2/7097 useless extension candidates. Maximal degree in co-relation 91045. Up to 6551 conditions per place. [2024-06-27 20:16:26,791 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 547 selfloop transitions, 27 changer transitions 0/619 dead transitions. [2024-06-27 20:16:26,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 619 transitions, 9223 flow [2024-06-27 20:16:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:16:26,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 20:16:26,792 INFO L175 Difference]: Start difference. First operand has 373 places, 596 transitions, 7734 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:16:26,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 619 transitions, 9223 flow [2024-06-27 20:16:29,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 619 transitions, 9133 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:29,650 INFO L231 Difference]: Finished difference. Result has 376 places, 599 transitions, 7775 flow [2024-06-27 20:16:29,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7644, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7775, PETRI_PLACES=376, PETRI_TRANSITIONS=599} [2024-06-27 20:16:29,650 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-27 20:16:29,650 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 599 transitions, 7775 flow [2024-06-27 20:16:29,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:16:29,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:29,651 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 20:16:29,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:16:29,651 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 20:16:29,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:29,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2082149577, now seen corresponding path program 2 times [2024-06-27 20:16:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:29,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430250870] [2024-06-27 20:16:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:29,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:30,243 INFO 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 20:16:30,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:30,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430250870] [2024-06-27 20:16:30,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430250870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:30,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:30,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:30,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837917780] [2024-06-27 20:16:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:30,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:30,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:30,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:30,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:16:30,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 599 transitions, 7775 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:16:30,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:30,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:16:30,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:32,330 INFO L124 PetriNetUnfolderBase]: 4624/7117 cut-off events. [2024-06-27 20:16:32,330 INFO L125 PetriNetUnfolderBase]: For 1992387/1992387 co-relation queries the response was YES. [2024-06-27 20:16:32,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91513 conditions, 7117 events. 4624/7117 cut-off events. For 1992387/1992387 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41220 event pairs, 675 based on Foata normal form. 1/7103 useless extension candidates. Maximal degree in co-relation 91338. Up to 6591 conditions per place. [2024-06-27 20:16:32,454 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 554 selfloop transitions, 19 changer transitions 0/618 dead transitions. [2024-06-27 20:16:32,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 618 transitions, 9034 flow [2024-06-27 20:16:32,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:16:32,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:16:32,455 INFO L175 Difference]: Start difference. First operand has 376 places, 599 transitions, 7775 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:16:32,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 618 transitions, 9034 flow [2024-06-27 20:16:36,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 618 transitions, 8978 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:36,119 INFO L231 Difference]: Finished difference. Result has 379 places, 602 transitions, 7842 flow [2024-06-27 20:16:36,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7721, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7842, PETRI_PLACES=379, PETRI_TRANSITIONS=602} [2024-06-27 20:16:36,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-27 20:16:36,120 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 602 transitions, 7842 flow [2024-06-27 20:16:36,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:16:36,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:36,120 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 20:16:36,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:16:36,120 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:36,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:36,120 INFO L85 PathProgramCache]: Analyzing trace with hash 291496721, now seen corresponding path program 5 times [2024-06-27 20:16:36,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:36,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127559697] [2024-06-27 20:16:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:36,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:36,997 INFO 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 20:16:36,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:36,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127559697] [2024-06-27 20:16:36,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127559697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:36,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:36,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:16:36,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638166093] [2024-06-27 20:16:36,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:36,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:16:36,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:16:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:16:37,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:16:37,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 602 transitions, 7842 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:37,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:37,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:16:37,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:39,094 INFO L124 PetriNetUnfolderBase]: 4668/7177 cut-off events. [2024-06-27 20:16:39,094 INFO L125 PetriNetUnfolderBase]: For 2036741/2036741 co-relation queries the response was YES. [2024-06-27 20:16:39,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91522 conditions, 7177 events. 4668/7177 cut-off events. For 2036741/2036741 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 41526 event pairs, 645 based on Foata normal form. 4/7179 useless extension candidates. Maximal degree in co-relation 91346. Up to 6344 conditions per place. [2024-06-27 20:16:39,210 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 470 selfloop transitions, 38 changer transitions 0/641 dead transitions. [2024-06-27 20:16:39,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 641 transitions, 9150 flow [2024-06-27 20:16:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:16:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:16:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:16:39,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:16:39,211 INFO L175 Difference]: Start difference. First operand has 379 places, 602 transitions, 7842 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:16:39,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 641 transitions, 9150 flow [2024-06-27 20:16:42,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 641 transitions, 9096 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:42,500 INFO L231 Difference]: Finished difference. Result has 385 places, 606 transitions, 8085 flow [2024-06-27 20:16:42,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7788, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8085, PETRI_PLACES=385, PETRI_TRANSITIONS=606} [2024-06-27 20:16:42,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-27 20:16:42,500 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 606 transitions, 8085 flow [2024-06-27 20:16:42,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:42,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:42,500 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 20:16:42,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:16:42,500 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:42,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:42,501 INFO L85 PathProgramCache]: Analyzing trace with hash 519582321, now seen corresponding path program 6 times [2024-06-27 20:16:42,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:42,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027107774] [2024-06-27 20:16:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:42,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:43,545 INFO 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 20:16:43,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:43,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027107774] [2024-06-27 20:16:43,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027107774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:43,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:43,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:16:43,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631114218] [2024-06-27 20:16:43,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:43,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:16:43,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:16:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:16:43,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:16:43,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 606 transitions, 8085 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:43,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:43,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:16:43,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:45,846 INFO L124 PetriNetUnfolderBase]: 4870/7395 cut-off events. [2024-06-27 20:16:45,846 INFO L125 PetriNetUnfolderBase]: For 2092101/2092101 co-relation queries the response was YES. [2024-06-27 20:16:45,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95248 conditions, 7395 events. 4870/7395 cut-off events. For 2092101/2092101 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42036 event pairs, 673 based on Foata normal form. 3/7396 useless extension candidates. Maximal degree in co-relation 95070. Up to 6590 conditions per place. [2024-06-27 20:16:45,976 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 477 selfloop transitions, 169 changer transitions 0/650 dead transitions. [2024-06-27 20:16:45,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 650 transitions, 10257 flow [2024-06-27 20:16:45,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:16:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:16:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:16:45,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:16:45,976 INFO L175 Difference]: Start difference. First operand has 385 places, 606 transitions, 8085 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:16:45,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 650 transitions, 10257 flow [2024-06-27 20:16:50,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 650 transitions, 9998 flow, removed 96 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:50,412 INFO L231 Difference]: Finished difference. Result has 390 places, 610 transitions, 8501 flow [2024-06-27 20:16:50,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7826, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8501, PETRI_PLACES=390, PETRI_TRANSITIONS=610} [2024-06-27 20:16:50,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-27 20:16:50,412 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 610 transitions, 8501 flow [2024-06-27 20:16:50,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:50,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:50,412 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 20:16:50,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:16:50,412 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:50,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash 519582569, now seen corresponding path program 6 times [2024-06-27 20:16:50,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:50,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169670194] [2024-06-27 20:16:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:50,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:51,441 INFO 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 20:16:51,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169670194] [2024-06-27 20:16:51,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169670194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:51,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:51,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:16:51,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225911269] [2024-06-27 20:16:51,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:51,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:16:51,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:16:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:16:51,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:16:51,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 610 transitions, 8501 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:51,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:51,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:16:51,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:53,840 INFO L124 PetriNetUnfolderBase]: 5022/7643 cut-off events. [2024-06-27 20:16:53,840 INFO L125 PetriNetUnfolderBase]: For 2400475/2400475 co-relation queries the response was YES. [2024-06-27 20:16:53,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100943 conditions, 7643 events. 5022/7643 cut-off events. For 2400475/2400475 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 43944 event pairs, 687 based on Foata normal form. 36/7677 useless extension candidates. Maximal degree in co-relation 100764. Up to 6712 conditions per place. [2024-06-27 20:16:53,982 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 505 selfloop transitions, 149 changer transitions 0/658 dead transitions. [2024-06-27 20:16:53,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 658 transitions, 10751 flow [2024-06-27 20:16:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:16:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:16:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 20:16:53,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-27 20:16:53,983 INFO L175 Difference]: Start difference. First operand has 390 places, 610 transitions, 8501 flow. Second operand 11 states and 217 transitions. [2024-06-27 20:16:53,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 658 transitions, 10751 flow [2024-06-27 20:16:58,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 658 transitions, 10106 flow, removed 156 selfloop flow, removed 9 redundant places. [2024-06-27 20:16:58,660 INFO L231 Difference]: Finished difference. Result has 392 places, 613 transitions, 8431 flow [2024-06-27 20:16:58,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7856, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8431, PETRI_PLACES=392, PETRI_TRANSITIONS=613} [2024-06-27 20:16:58,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-27 20:16:58,661 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 613 transitions, 8431 flow [2024-06-27 20:16:58,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:58,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:58,661 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 20:16:58,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:16:58,661 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:58,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:58,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1001742169, now seen corresponding path program 7 times [2024-06-27 20:16:58,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:58,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055635468] [2024-06-27 20:16:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:58,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:59,825 INFO 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 20:16:59,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:59,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055635468] [2024-06-27 20:16:59,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055635468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:59,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:59,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:16:59,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171428649] [2024-06-27 20:16:59,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:59,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:16:59,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:59,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:16:59,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:17:00,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:17:00,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 613 transitions, 8431 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:00,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:00,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:17:00,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:02,168 INFO L124 PetriNetUnfolderBase]: 5040/7677 cut-off events. [2024-06-27 20:17:02,169 INFO L125 PetriNetUnfolderBase]: For 2249339/2249339 co-relation queries the response was YES. [2024-06-27 20:17:02,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101675 conditions, 7677 events. 5040/7677 cut-off events. For 2249339/2249339 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 44214 event pairs, 689 based on Foata normal form. 3/7678 useless extension candidates. Maximal degree in co-relation 101495. Up to 6864 conditions per place. [2024-06-27 20:17:02,316 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 512 selfloop transitions, 143 changer transitions 0/659 dead transitions. [2024-06-27 20:17:02,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 659 transitions, 10882 flow [2024-06-27 20:17:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:17:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:17:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 20:17:02,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-27 20:17:02,317 INFO L175 Difference]: Start difference. First operand has 392 places, 613 transitions, 8431 flow. Second operand 11 states and 217 transitions. [2024-06-27 20:17:02,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 659 transitions, 10882 flow [2024-06-27 20:17:07,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 659 transitions, 10483 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-27 20:17:07,259 INFO L231 Difference]: Finished difference. Result has 394 places, 617 transitions, 8667 flow [2024-06-27 20:17:07,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8032, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8667, PETRI_PLACES=394, PETRI_TRANSITIONS=617} [2024-06-27 20:17:07,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-27 20:17:07,260 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 617 transitions, 8667 flow [2024-06-27 20:17:07,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:07,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:07,260 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 20:17:07,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:17:07,260 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:07,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash 297937529, now seen corresponding path program 7 times [2024-06-27 20:17:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:07,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552910846] [2024-06-27 20:17:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:07,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:08,529 INFO 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 20:17:08,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:08,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552910846] [2024-06-27 20:17:08,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552910846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:08,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:08,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:17:08,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332268730] [2024-06-27 20:17:08,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:08,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:17:08,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:08,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:17:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:17:08,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:17:08,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 617 transitions, 8667 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:08,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:08,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:17:08,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:11,252 INFO L124 PetriNetUnfolderBase]: 5192/7925 cut-off events. [2024-06-27 20:17:11,252 INFO L125 PetriNetUnfolderBase]: For 2531013/2531013 co-relation queries the response was YES. [2024-06-27 20:17:11,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106084 conditions, 7925 events. 5192/7925 cut-off events. For 2531013/2531013 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 46102 event pairs, 711 based on Foata normal form. 36/7959 useless extension candidates. Maximal degree in co-relation 105903. Up to 6986 conditions per place. [2024-06-27 20:17:11,391 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 537 selfloop transitions, 126 changer transitions 0/667 dead transitions. [2024-06-27 20:17:11,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 667 transitions, 11200 flow [2024-06-27 20:17:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:17:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:17:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 20:17:11,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:17:11,392 INFO L175 Difference]: Start difference. First operand has 394 places, 617 transitions, 8667 flow. Second operand 11 states and 220 transitions. [2024-06-27 20:17:11,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 667 transitions, 11200 flow [2024-06-27 20:17:16,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 667 transitions, 10595 flow, removed 162 selfloop flow, removed 9 redundant places. [2024-06-27 20:17:16,136 INFO L231 Difference]: Finished difference. Result has 396 places, 620 transitions, 8601 flow [2024-06-27 20:17:16,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8062, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8601, PETRI_PLACES=396, PETRI_TRANSITIONS=620} [2024-06-27 20:17:16,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-27 20:17:16,136 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 620 transitions, 8601 flow [2024-06-27 20:17:16,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:16,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:16,136 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 20:17:16,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:17:16,137 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:16,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:16,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1998264067, now seen corresponding path program 8 times [2024-06-27 20:17:16,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:16,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255579212] [2024-06-27 20:17:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:16,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:17,277 INFO 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 20:17:17,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:17,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255579212] [2024-06-27 20:17:17,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255579212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:17,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:17,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:17:17,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083739353] [2024-06-27 20:17:17,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:17,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:17:17,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:17:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:17:17,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:17:17,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 620 transitions, 8601 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:17,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:17,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:17:17,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:19,914 INFO L124 PetriNetUnfolderBase]: 5210/7959 cut-off events. [2024-06-27 20:17:19,914 INFO L125 PetriNetUnfolderBase]: For 2369386/2369386 co-relation queries the response was YES. [2024-06-27 20:17:19,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106826 conditions, 7959 events. 5210/7959 cut-off events. For 2369386/2369386 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 46448 event pairs, 702 based on Foata normal form. 3/7960 useless extension candidates. Maximal degree in co-relation 106644. Up to 7099 conditions per place. [2024-06-27 20:17:20,116 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 481 selfloop transitions, 179 changer transitions 0/664 dead transitions. [2024-06-27 20:17:20,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 664 transitions, 10841 flow [2024-06-27 20:17:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:17:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:17:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 20:17:20,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-27 20:17:20,123 INFO L175 Difference]: Start difference. First operand has 396 places, 620 transitions, 8601 flow. Second operand 11 states and 216 transitions. [2024-06-27 20:17:20,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 664 transitions, 10841 flow [2024-06-27 20:17:24,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 664 transitions, 10482 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-27 20:17:24,647 INFO L231 Difference]: Finished difference. Result has 398 places, 624 transitions, 8961 flow [2024-06-27 20:17:24,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8242, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8961, PETRI_PLACES=398, PETRI_TRANSITIONS=624} [2024-06-27 20:17:24,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-27 20:17:24,648 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 624 transitions, 8961 flow [2024-06-27 20:17:24,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:24,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:24,648 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 20:17:24,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:17:24,648 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:24,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash 200636867, now seen corresponding path program 8 times [2024-06-27 20:17:24,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:24,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898959112] [2024-06-27 20:17:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:24,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:25,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:25,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898959112] [2024-06-27 20:17:25,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898959112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:25,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:25,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:17:25,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666845710] [2024-06-27 20:17:25,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:25,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:17:25,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:25,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:17:25,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:17:26,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:17:26,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 624 transitions, 8961 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:26,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:26,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:17:26,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:28,703 INFO L124 PetriNetUnfolderBase]: 5238/8008 cut-off events. [2024-06-27 20:17:28,703 INFO L125 PetriNetUnfolderBase]: For 2390955/2390955 co-relation queries the response was YES. [2024-06-27 20:17:28,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107303 conditions, 8008 events. 5238/8008 cut-off events. For 2390955/2390955 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 46819 event pairs, 714 based on Foata normal form. 6/8012 useless extension candidates. Maximal degree in co-relation 107120. Up to 7004 conditions per place. [2024-06-27 20:17:28,832 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 512 selfloop transitions, 160 changer transitions 0/676 dead transitions. [2024-06-27 20:17:28,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 676 transitions, 11301 flow [2024-06-27 20:17:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:17:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:17:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-27 20:17:28,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:17:28,833 INFO L175 Difference]: Start difference. First operand has 398 places, 624 transitions, 8961 flow. Second operand 12 states and 234 transitions. [2024-06-27 20:17:28,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 676 transitions, 11301 flow [2024-06-27 20:17:34,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 676 transitions, 10612 flow, removed 168 selfloop flow, removed 9 redundant places. [2024-06-27 20:17:34,020 INFO L231 Difference]: Finished difference. Result has 401 places, 627 transitions, 8893 flow [2024-06-27 20:17:34,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8272, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8893, PETRI_PLACES=401, PETRI_TRANSITIONS=627} [2024-06-27 20:17:34,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-27 20:17:34,021 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 627 transitions, 8893 flow [2024-06-27 20:17:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:34,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:34,021 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 20:17:34,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:17:34,021 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:34,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash 298168169, now seen corresponding path program 9 times [2024-06-27 20:17:34,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:34,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181141551] [2024-06-27 20:17:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:35,055 INFO 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 20:17:35,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:35,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181141551] [2024-06-27 20:17:35,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181141551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:35,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:35,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:17:35,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863017574] [2024-06-27 20:17:35,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:35,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:17:35,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:35,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:17:35,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:17:35,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:17:35,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 627 transitions, 8893 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:35,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:35,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:17:35,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:37,698 INFO L124 PetriNetUnfolderBase]: 5266/8052 cut-off events. [2024-06-27 20:17:37,698 INFO L125 PetriNetUnfolderBase]: For 2435309/2435309 co-relation queries the response was YES. [2024-06-27 20:17:37,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108270 conditions, 8052 events. 5266/8052 cut-off events. For 2435309/2435309 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 47121 event pairs, 706 based on Foata normal form. 6/8056 useless extension candidates. Maximal degree in co-relation 108086. Up to 7443 conditions per place. [2024-06-27 20:17:37,918 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 565 selfloop transitions, 103 changer transitions 0/672 dead transitions. [2024-06-27 20:17:37,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 672 transitions, 11345 flow [2024-06-27 20:17:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:17:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:17:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 20:17:37,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-27 20:17:37,919 INFO L175 Difference]: Start difference. First operand has 401 places, 627 transitions, 8893 flow. Second operand 11 states and 212 transitions. [2024-06-27 20:17:37,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 672 transitions, 11345 flow [2024-06-27 20:17:42,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 672 transitions, 10900 flow, removed 68 selfloop flow, removed 10 redundant places. [2024-06-27 20:17:42,381 INFO L231 Difference]: Finished difference. Result has 402 places, 630 transitions, 8960 flow [2024-06-27 20:17:42,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8460, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8960, PETRI_PLACES=402, PETRI_TRANSITIONS=630} [2024-06-27 20:17:42,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-27 20:17:42,381 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 630 transitions, 8960 flow [2024-06-27 20:17:42,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:42,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:42,383 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 20:17:42,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:17:42,383 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:42,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:42,383 INFO L85 PathProgramCache]: Analyzing trace with hash 291681419, now seen corresponding path program 10 times [2024-06-27 20:17:42,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:42,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949362235] [2024-06-27 20:17:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:42,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:43,426 INFO 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 20:17:43,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:43,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949362235] [2024-06-27 20:17:43,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949362235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:43,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:43,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:17:43,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572806367] [2024-06-27 20:17:43,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:43,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:17:43,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:43,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:17:43,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:17:43,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:17:43,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 630 transitions, 8960 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:43,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:43,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:17:43,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:46,197 INFO L124 PetriNetUnfolderBase]: 5418/8295 cut-off events. [2024-06-27 20:17:46,198 INFO L125 PetriNetUnfolderBase]: For 2714317/2714317 co-relation queries the response was YES. [2024-06-27 20:17:46,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112937 conditions, 8295 events. 5418/8295 cut-off events. For 2714317/2714317 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49067 event pairs, 727 based on Foata normal form. 36/8329 useless extension candidates. Maximal degree in co-relation 112752. Up to 7348 conditions per place. [2024-06-27 20:17:46,330 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 553 selfloop transitions, 124 changer transitions 0/681 dead transitions. [2024-06-27 20:17:46,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 681 transitions, 11805 flow [2024-06-27 20:17:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:17:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:17:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 20:17:46,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-27 20:17:46,332 INFO L175 Difference]: Start difference. First operand has 402 places, 630 transitions, 8960 flow. Second operand 11 states and 219 transitions. [2024-06-27 20:17:46,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 681 transitions, 11805 flow [2024-06-27 20:17:50,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 681 transitions, 11350 flow, removed 137 selfloop flow, removed 8 redundant places. [2024-06-27 20:17:50,834 INFO L231 Difference]: Finished difference. Result has 405 places, 633 transitions, 9058 flow [2024-06-27 20:17:50,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8507, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9058, PETRI_PLACES=405, PETRI_TRANSITIONS=633} [2024-06-27 20:17:50,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-27 20:17:50,834 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 633 transitions, 9058 flow [2024-06-27 20:17:50,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:50,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:50,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:50,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:17:50,835 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 20:17:50,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash -20999803, now seen corresponding path program 11 times [2024-06-27 20:17:50,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:50,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336316078] [2024-06-27 20:17:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:50,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:51,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:51,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336316078] [2024-06-27 20:17:51,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336316078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:51,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:51,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:17:51,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055127278] [2024-06-27 20:17:51,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:51,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:17:51,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:51,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:17:51,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:17:51,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:17:51,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 633 transitions, 9058 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:51,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:51,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:17:51,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:54,570 INFO L124 PetriNetUnfolderBase]: 5446/8344 cut-off events. [2024-06-27 20:17:54,570 INFO L125 PetriNetUnfolderBase]: For 2572285/2572285 co-relation queries the response was YES. [2024-06-27 20:17:54,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113935 conditions, 8344 events. 5446/8344 cut-off events. For 2572285/2572285 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 49407 event pairs, 732 based on Foata normal form. 6/8348 useless extension candidates. Maximal degree in co-relation 113749. Up to 7623 conditions per place. [2024-06-27 20:17:54,713 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 565 selfloop transitions, 114 changer transitions 0/683 dead transitions. [2024-06-27 20:17:54,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 683 transitions, 11942 flow [2024-06-27 20:17:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:17:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:17:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 20:17:54,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-27 20:17:54,714 INFO L175 Difference]: Start difference. First operand has 405 places, 633 transitions, 9058 flow. Second operand 11 states and 213 transitions. [2024-06-27 20:17:54,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 683 transitions, 11942 flow [2024-06-27 20:17:59,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 683 transitions, 11463 flow, removed 118 selfloop flow, removed 9 redundant places. [2024-06-27 20:17:59,494 INFO L231 Difference]: Finished difference. Result has 408 places, 640 transitions, 9533 flow [2024-06-27 20:17:59,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8691, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9533, PETRI_PLACES=408, PETRI_TRANSITIONS=640} [2024-06-27 20:17:59,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-27 20:17:59,495 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 640 transitions, 9533 flow [2024-06-27 20:17:59,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:59,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:59,495 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 20:17:59,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:17:59,495 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 20:17:59,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash 200645237, now seen corresponding path program 12 times [2024-06-27 20:17:59,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:59,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433300619] [2024-06-27 20:17:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:59,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:00,527 INFO 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 20:18:00,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:00,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433300619] [2024-06-27 20:18:00,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433300619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:00,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:00,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:18:00,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850018771] [2024-06-27 20:18:00,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:00,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:18:00,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:00,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:18:00,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:18:00,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:18:00,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 640 transitions, 9533 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:00,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:00,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:18:00,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:03,315 INFO L124 PetriNetUnfolderBase]: 5502/8437 cut-off events. [2024-06-27 20:18:03,315 INFO L125 PetriNetUnfolderBase]: For 2563904/2563904 co-relation queries the response was YES. [2024-06-27 20:18:03,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114228 conditions, 8437 events. 5502/8437 cut-off events. For 2563904/2563904 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50153 event pairs, 740 based on Foata normal form. 6/8441 useless extension candidates. Maximal degree in co-relation 114040. Up to 7750 conditions per place. [2024-06-27 20:18:03,447 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 566 selfloop transitions, 120 changer transitions 0/690 dead transitions. [2024-06-27 20:18:03,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 690 transitions, 11954 flow [2024-06-27 20:18:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 20:18:03,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-27 20:18:03,448 INFO L175 Difference]: Start difference. First operand has 408 places, 640 transitions, 9533 flow. Second operand 11 states and 212 transitions. [2024-06-27 20:18:03,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 690 transitions, 11954 flow [2024-06-27 20:18:08,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 690 transitions, 11156 flow, removed 295 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:08,955 INFO L231 Difference]: Finished difference. Result has 412 places, 648 transitions, 9464 flow [2024-06-27 20:18:08,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8735, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9464, PETRI_PLACES=412, PETRI_TRANSITIONS=648} [2024-06-27 20:18:08,955 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-27 20:18:08,955 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 648 transitions, 9464 flow [2024-06-27 20:18:08,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:08,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:08,956 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 20:18:08,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:18:08,956 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 20:18:08,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash -21008421, now seen corresponding path program 9 times [2024-06-27 20:18:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:08,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491373246] [2024-06-27 20:18:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:08,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:10,015 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 20:18:10,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:10,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491373246] [2024-06-27 20:18:10,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491373246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:10,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:10,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:18:10,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113272568] [2024-06-27 20:18:10,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:10,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:18:10,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:18:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:18:10,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:18:10,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 648 transitions, 9464 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:10,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:10,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:18:10,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:12,914 INFO L124 PetriNetUnfolderBase]: 5544/8508 cut-off events. [2024-06-27 20:18:12,914 INFO L125 PetriNetUnfolderBase]: For 2596990/2596990 co-relation queries the response was YES. [2024-06-27 20:18:13,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115280 conditions, 8508 events. 5544/8508 cut-off events. For 2596990/2596990 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 50687 event pairs, 747 based on Foata normal form. 3/8509 useless extension candidates. Maximal degree in co-relation 115090. Up to 7585 conditions per place. [2024-06-27 20:18:13,080 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 531 selfloop transitions, 164 changer transitions 0/699 dead transitions. [2024-06-27 20:18:13,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 699 transitions, 12896 flow [2024-06-27 20:18:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 20:18:13,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-27 20:18:13,081 INFO L175 Difference]: Start difference. First operand has 412 places, 648 transitions, 9464 flow. Second operand 11 states and 219 transitions. [2024-06-27 20:18:13,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 699 transitions, 12896 flow [2024-06-27 20:18:18,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 699 transitions, 12080 flow, removed 296 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:18,391 INFO L231 Difference]: Finished difference. Result has 415 places, 656 transitions, 9729 flow [2024-06-27 20:18:18,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8648, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9729, PETRI_PLACES=415, PETRI_TRANSITIONS=656} [2024-06-27 20:18:18,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-27 20:18:18,391 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 656 transitions, 9729 flow [2024-06-27 20:18:18,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:18,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:18,392 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 20:18:18,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:18:18,392 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 20:18:18,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash 528153449, now seen corresponding path program 13 times [2024-06-27 20:18:18,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:18,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121341448] [2024-06-27 20:18:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:18,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:19,416 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 20:18:19,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121341448] [2024-06-27 20:18:19,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121341448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:19,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:19,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:18:19,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621454129] [2024-06-27 20:18:19,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:19,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:18:19,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:19,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:18:19,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:18:19,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:18:19,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 656 transitions, 9729 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:19,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:19,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:18:19,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:22,404 INFO L124 PetriNetUnfolderBase]: 5610/8609 cut-off events. [2024-06-27 20:18:22,404 INFO L125 PetriNetUnfolderBase]: For 2720898/2720898 co-relation queries the response was YES. [2024-06-27 20:18:22,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117604 conditions, 8609 events. 5610/8609 cut-off events. For 2720898/2720898 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51407 event pairs, 727 based on Foata normal form. 6/8613 useless extension candidates. Maximal degree in co-relation 117413. Up to 5915 conditions per place. [2024-06-27 20:18:22,555 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 424 selfloop transitions, 283 changer transitions 0/711 dead transitions. [2024-06-27 20:18:22,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 711 transitions, 12957 flow [2024-06-27 20:18:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-27 20:18:22,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-27 20:18:22,556 INFO L175 Difference]: Start difference. First operand has 415 places, 656 transitions, 9729 flow. Second operand 11 states and 222 transitions. [2024-06-27 20:18:22,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 711 transitions, 12957 flow [2024-06-27 20:18:27,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 711 transitions, 12396 flow, removed 196 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:27,274 INFO L231 Difference]: Finished difference. Result has 419 places, 662 transitions, 10364 flow [2024-06-27 20:18:27,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9168, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10364, PETRI_PLACES=419, PETRI_TRANSITIONS=662} [2024-06-27 20:18:27,274 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-27 20:18:27,274 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 662 transitions, 10364 flow [2024-06-27 20:18:27,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:27,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:27,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:27,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:18:27,275 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:27,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:27,275 INFO L85 PathProgramCache]: Analyzing trace with hash 208680437, now seen corresponding path program 14 times [2024-06-27 20:18:27,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:27,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890704302] [2024-06-27 20:18:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:27,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:28,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:28,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890704302] [2024-06-27 20:18:28,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890704302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:28,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:28,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:18:28,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349635587] [2024-06-27 20:18:28,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:28,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:18:28,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:28,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:18:28,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:18:28,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:18:28,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 662 transitions, 10364 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:28,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:28,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:18:28,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:31,471 INFO L124 PetriNetUnfolderBase]: 5638/8648 cut-off events. [2024-06-27 20:18:31,471 INFO L125 PetriNetUnfolderBase]: For 2777999/2777999 co-relation queries the response was YES. [2024-06-27 20:18:31,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120099 conditions, 8648 events. 5638/8648 cut-off events. For 2777999/2777999 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 51651 event pairs, 753 based on Foata normal form. 6/8652 useless extension candidates. Maximal degree in co-relation 119906. Up to 7371 conditions per place. [2024-06-27 20:18:31,617 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 483 selfloop transitions, 231 changer transitions 0/718 dead transitions. [2024-06-27 20:18:31,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 718 transitions, 12860 flow [2024-06-27 20:18:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:18:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:18:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 254 transitions. [2024-06-27 20:18:31,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543828264758497 [2024-06-27 20:18:31,618 INFO L175 Difference]: Start difference. First operand has 419 places, 662 transitions, 10364 flow. Second operand 13 states and 254 transitions. [2024-06-27 20:18:31,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 718 transitions, 12860 flow [2024-06-27 20:18:37,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 718 transitions, 12259 flow, removed 156 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:37,035 INFO L231 Difference]: Finished difference. Result has 425 places, 665 transitions, 10566 flow [2024-06-27 20:18:37,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9765, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10566, PETRI_PLACES=425, PETRI_TRANSITIONS=665} [2024-06-27 20:18:37,036 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-27 20:18:37,036 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 665 transitions, 10566 flow [2024-06-27 20:18:37,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:37,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:37,037 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 20:18:37,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:18:37,037 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:37,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash 208680189, now seen corresponding path program 10 times [2024-06-27 20:18:37,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:37,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040808523] [2024-06-27 20:18:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:37,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:38,009 INFO 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 20:18:38,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:38,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040808523] [2024-06-27 20:18:38,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040808523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:38,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:38,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:18:38,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836840706] [2024-06-27 20:18:38,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:38,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:18:38,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:38,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:18:38,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:18:38,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:18:38,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 665 transitions, 10566 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:38,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:38,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:18:38,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:41,110 INFO L124 PetriNetUnfolderBase]: 5656/8688 cut-off events. [2024-06-27 20:18:41,110 INFO L125 PetriNetUnfolderBase]: For 2776293/2776293 co-relation queries the response was YES. [2024-06-27 20:18:41,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120930 conditions, 8688 events. 5656/8688 cut-off events. For 2776293/2776293 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 52071 event pairs, 758 based on Foata normal form. 3/8689 useless extension candidates. Maximal degree in co-relation 120735. Up to 7442 conditions per place. [2024-06-27 20:18:41,253 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 436 selfloop transitions, 271 changer transitions 0/711 dead transitions. [2024-06-27 20:18:41,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 711 transitions, 13436 flow [2024-06-27 20:18:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 20:18:41,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-27 20:18:41,254 INFO L175 Difference]: Start difference. First operand has 425 places, 665 transitions, 10566 flow. Second operand 11 states and 217 transitions. [2024-06-27 20:18:41,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 711 transitions, 13436 flow [2024-06-27 20:18:46,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 711 transitions, 12855 flow, removed 68 selfloop flow, removed 11 redundant places. [2024-06-27 20:18:46,752 INFO L231 Difference]: Finished difference. Result has 425 places, 669 transitions, 10920 flow [2024-06-27 20:18:46,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9985, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10920, PETRI_PLACES=425, PETRI_TRANSITIONS=669} [2024-06-27 20:18:46,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-27 20:18:46,753 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 669 transitions, 10920 flow [2024-06-27 20:18:46,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:46,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:46,753 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 20:18:46,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:18:46,753 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:46,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash 208688807, now seen corresponding path program 15 times [2024-06-27 20:18:46,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:46,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669240966] [2024-06-27 20:18:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:46,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:47,722 INFO 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 20:18:47,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669240966] [2024-06-27 20:18:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669240966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:47,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:47,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:18:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331572270] [2024-06-27 20:18:47,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:47,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:18:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:47,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:18:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:18:47,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:18:47,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 669 transitions, 10920 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:47,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:47,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:18:47,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:50,729 INFO L124 PetriNetUnfolderBase]: 5646/8673 cut-off events. [2024-06-27 20:18:50,729 INFO L125 PetriNetUnfolderBase]: For 2788355/2788355 co-relation queries the response was YES. [2024-06-27 20:18:50,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120548 conditions, 8673 events. 5646/8673 cut-off events. For 2788355/2788355 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 52012 event pairs, 759 based on Foata normal form. 6/8677 useless extension candidates. Maximal degree in co-relation 120352. Up to 7838 conditions per place. [2024-06-27 20:18:50,894 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 546 selfloop transitions, 161 changer transitions 0/711 dead transitions. [2024-06-27 20:18:50,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 711 transitions, 12950 flow [2024-06-27 20:18:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 20:18:50,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-27 20:18:50,895 INFO L175 Difference]: Start difference. First operand has 425 places, 669 transitions, 10920 flow. Second operand 11 states and 213 transitions. [2024-06-27 20:18:50,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 711 transitions, 12950 flow [2024-06-27 20:18:56,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 711 transitions, 11944 flow, removed 227 selfloop flow, removed 9 redundant places. [2024-06-27 20:18:56,827 INFO L231 Difference]: Finished difference. Result has 427 places, 669 transitions, 10244 flow [2024-06-27 20:18:56,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9914, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10244, PETRI_PLACES=427, PETRI_TRANSITIONS=669} [2024-06-27 20:18:56,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-27 20:18:56,828 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 669 transitions, 10244 flow [2024-06-27 20:18:56,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:56,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:56,828 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 20:18:56,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:18:56,828 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:56,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:56,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2068571439, now seen corresponding path program 11 times [2024-06-27 20:18:56,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:56,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481207108] [2024-06-27 20:18:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:56,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:57,856 INFO 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 20:18:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481207108] [2024-06-27 20:18:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481207108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:57,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:57,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:18:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562263172] [2024-06-27 20:18:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:18:57,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:57,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:18:57,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:18:58,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:18:58,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 669 transitions, 10244 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:58,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:58,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:18:58,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:00,818 INFO L124 PetriNetUnfolderBase]: 5640/8666 cut-off events. [2024-06-27 20:19:00,819 INFO L125 PetriNetUnfolderBase]: For 2752584/2752584 co-relation queries the response was YES. [2024-06-27 20:19:00,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118901 conditions, 8666 events. 5640/8666 cut-off events. For 2752584/2752584 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 51940 event pairs, 758 based on Foata normal form. 3/8667 useless extension candidates. Maximal degree in co-relation 118704. Up to 7816 conditions per place. [2024-06-27 20:19:00,970 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 567 selfloop transitions, 141 changer transitions 0/712 dead transitions. [2024-06-27 20:19:00,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 712 transitions, 12803 flow [2024-06-27 20:19:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:19:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:19:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 20:19:00,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-27 20:19:00,971 INFO L175 Difference]: Start difference. First operand has 427 places, 669 transitions, 10244 flow. Second operand 11 states and 216 transitions. [2024-06-27 20:19:00,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 712 transitions, 12803 flow