./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix015.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix015.oepc.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/mix015.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix015.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:19:43,912 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:19:43,984 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:19:43,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:19:43,989 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:19:44,028 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:19:44,029 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:19:44,029 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:19:44,030 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:19:44,035 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:19:44,036 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:19:44,036 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:19:44,037 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:19:44,039 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:19:44,039 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:19:44,041 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:19:44,041 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:19:44,041 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:19:44,042 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:19:44,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:19:44,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:19:44,043 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:19:44,043 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:19:44,043 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:19:44,044 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:19:44,044 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:19:44,044 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:19:44,044 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:19:44,045 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:19:44,045 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:19:44,046 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:19:44,046 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:19:44,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:19:44,047 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:19:44,047 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:19:44,047 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:19:44,048 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:19:44,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:19:44,049 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:19:44,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:19:44,049 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:19:44,050 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:19:44,050 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:19:44,050 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:19:44,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:19:44,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:19:44,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:19:44,339 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:19:44,341 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:19:44,342 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix015.oepc.i [2024-06-27 18:19:45,537 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:19:45,781 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:19:45,786 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.oepc.i [2024-06-27 18:19:45,800 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d93ed836/8492c6795ff848778dbdd266a8497a83/FLAG9aca49dad [2024-06-27 18:19:45,813 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d93ed836/8492c6795ff848778dbdd266a8497a83 [2024-06-27 18:19:45,817 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:19:45,817 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:19:45,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix015.oepc.yml/witness.yml [2024-06-27 18:19:46,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:19:46,039 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:19:46,040 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:19:46,040 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:19:46,045 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:19:46,045 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:19:45" (1/2) ... [2024-06-27 18:19:46,047 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9f1c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:19:46, skipping insertion in model container [2024-06-27 18:19:46,047 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:19:45" (1/2) ... [2024-06-27 18:19:46,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@21acc801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:19:46, skipping insertion in model container [2024-06-27 18:19:46,049 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:19:46" (2/2) ... [2024-06-27 18:19:46,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9f1c50 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46, skipping insertion in model container [2024-06-27 18:19:46,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:19:46" (2/2) ... [2024-06-27 18:19:46,051 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:19:46,152 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:19:46,153 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 18:19:46,153 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 18:19:46,154 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 18:19:46,154 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:19:46,154 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-27 18:19:46,198 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:19:46,409 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.oepc.i[945,958] [2024-06-27 18:19:46,685 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:19:46,694 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:19:46,735 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.oepc.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:19:46,846 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:19:46,897 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:19:46,898 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46 WrapperNode [2024-06-27 18:19:46,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:19:46,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:19:46,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:19:46,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:19:46,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:46,943 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:46,985 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2024-06-27 18:19:46,989 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:19:46,990 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:19:46,990 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:19:46,991 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:19:47,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:47,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:47,020 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:47,044 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 18:19:47,049 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:47,050 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:47,062 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:47,064 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:47,066 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:47,067 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:47,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:19:47,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:19:47,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:19:47,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:19:47,072 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (1/1) ... [2024-06-27 18:19:47,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:19:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:19:47,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 18:19:47,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 18:19:47,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:19:47,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:19:47,141 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:19:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:19:47,141 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:19:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:19:47,141 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:19:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:19:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:19:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:19:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:19:47,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:19:47,143 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:19:47,273 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:19:47,275 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:19:47,662 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:19:47,663 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:19:47,865 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:19:47,896 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:19:47,897 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:19:47 BoogieIcfgContainer [2024-06-27 18:19:47,897 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:19:47,899 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:19:47,899 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:19:47,902 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:19:47,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:19:45" (1/4) ... [2024-06-27 18:19:47,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e67531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:19:47, skipping insertion in model container [2024-06-27 18:19:47,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:19:46" (2/4) ... [2024-06-27 18:19:47,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e67531 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:19:47, skipping insertion in model container [2024-06-27 18:19:47,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:19:46" (3/4) ... [2024-06-27 18:19:47,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e67531 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:19:47, skipping insertion in model container [2024-06-27 18:19:47,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:19:47" (4/4) ... [2024-06-27 18:19:47,904 INFO L112 eAbstractionObserver]: Analyzing ICFG mix015.oepc.i [2024-06-27 18:19:47,921 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:19:47,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:19:47,922 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:19:47,976 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:19:48,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 110 flow [2024-06-27 18:19:48,049 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2024-06-27 18:19:48,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:19:48,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 46 events. 1/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-06-27 18:19:48,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 110 flow [2024-06-27 18:19:48,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 46 transitions, 101 flow [2024-06-27 18:19:48,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:19:48,081 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;@5effcc8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:19:48,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 18:19:48,086 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:19:48,087 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:19:48,087 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:19:48,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:48,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:19:48,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:48,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:48,096 INFO L85 PathProgramCache]: Analyzing trace with hash 348695165, now seen corresponding path program 1 times [2024-06-27 18:19:48,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:48,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324949722] [2024-06-27 18:19:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:48,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:49,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:49,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324949722] [2024-06-27 18:19:49,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324949722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:49,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:49,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:19:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717883981] [2024-06-27 18:19:49,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:49,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:19:49,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:49,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:19:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:19:49,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 18:19:49,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:49,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:49,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 18:19:49,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:50,483 INFO L124 PetriNetUnfolderBase]: 3699/6169 cut-off events. [2024-06-27 18:19:50,484 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 18:19:50,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11595 conditions, 6169 events. 3699/6169 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 41137 event pairs, 2881 based on Foata normal form. 176/5849 useless extension candidates. Maximal degree in co-relation 11583. Up to 5323 conditions per place. [2024-06-27 18:19:50,527 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 41 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-27 18:19:50,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 227 flow [2024-06-27 18:19:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:19:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:19:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-27 18:19:50,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6938775510204082 [2024-06-27 18:19:50,542 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 101 flow. Second operand 3 states and 102 transitions. [2024-06-27 18:19:50,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 227 flow [2024-06-27 18:19:50,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:19:50,551 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 133 flow [2024-06-27 18:19:50,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-27 18:19:50,556 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-06-27 18:19:50,556 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 133 flow [2024-06-27 18:19:50,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:50,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:50,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:19:50,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:19:50,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:50,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash 348695892, now seen corresponding path program 1 times [2024-06-27 18:19:50,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:50,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848370734] [2024-06-27 18:19:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:50,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:50,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:50,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848370734] [2024-06-27 18:19:50,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848370734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:50,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:50,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:19:50,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254210769] [2024-06-27 18:19:50,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:50,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:19:50,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:50,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:19:50,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:19:50,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 49 [2024-06-27 18:19:50,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 18:19:50,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:50,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 49 [2024-06-27 18:19:50,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:51,057 INFO L124 PetriNetUnfolderBase]: 978/2048 cut-off events. [2024-06-27 18:19:51,057 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-06-27 18:19:51,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3794 conditions, 2048 events. 978/2048 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14560 event pairs, 610 based on Foata normal form. 0/1913 useless extension candidates. Maximal degree in co-relation 3782. Up to 1259 conditions per place. [2024-06-27 18:19:51,072 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 35 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-06-27 18:19:51,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 63 transitions, 236 flow [2024-06-27 18:19:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:19:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:19:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2024-06-27 18:19:51,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7891156462585034 [2024-06-27 18:19:51,078 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 133 flow. Second operand 3 states and 116 transitions. [2024-06-27 18:19:51,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 63 transitions, 236 flow [2024-06-27 18:19:51,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:19:51,081 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 126 flow [2024-06-27 18:19:51,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-27 18:19:51,083 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-06-27 18:19:51,083 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 126 flow [2024-06-27 18:19:51,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 18:19:51,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:51,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:19:51,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:19:51,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:51,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:51,093 INFO L85 PathProgramCache]: Analyzing trace with hash 88628475, now seen corresponding path program 1 times [2024-06-27 18:19:51,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:51,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759283316] [2024-06-27 18:19:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:51,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:52,115 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 18:19:52,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:52,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759283316] [2024-06-27 18:19:52,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759283316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:52,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:52,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:19:52,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673035303] [2024-06-27 18:19:52,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:52,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:19:52,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:52,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:19:52,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:19:52,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 18:19:52,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:52,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:52,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 18:19:52,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:52,892 INFO L124 PetriNetUnfolderBase]: 3141/5239 cut-off events. [2024-06-27 18:19:52,892 INFO L125 PetriNetUnfolderBase]: For 1190/1190 co-relation queries the response was YES. [2024-06-27 18:19:52,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11020 conditions, 5239 events. 3141/5239 cut-off events. For 1190/1190 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33669 event pairs, 2003 based on Foata normal form. 3/5049 useless extension candidates. Maximal degree in co-relation 11007. Up to 4514 conditions per place. [2024-06-27 18:19:53,010 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 49 selfloop transitions, 8 changer transitions 2/73 dead transitions. [2024-06-27 18:19:53,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 316 flow [2024-06-27 18:19:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:19:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:19:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 18:19:53,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-06-27 18:19:53,012 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 126 flow. Second operand 4 states and 127 transitions. [2024-06-27 18:19:53,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 316 flow [2024-06-27 18:19:53,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:19:53,015 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 187 flow [2024-06-27 18:19:53,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-27 18:19:53,016 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2024-06-27 18:19:53,016 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 187 flow [2024-06-27 18:19:53,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:53,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:53,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:19:53,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:19:53,017 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:53,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1547483730, now seen corresponding path program 1 times [2024-06-27 18:19:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:53,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395387335] [2024-06-27 18:19:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:54,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:54,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395387335] [2024-06-27 18:19:54,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395387335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:54,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:54,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:19:54,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514412734] [2024-06-27 18:19:54,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:54,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:19:54,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:54,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:19:54,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:19:54,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-06-27 18:19:54,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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 18:19:54,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:54,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-06-27 18:19:54,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:55,190 INFO L124 PetriNetUnfolderBase]: 3177/5401 cut-off events. [2024-06-27 18:19:55,191 INFO L125 PetriNetUnfolderBase]: For 2275/2275 co-relation queries the response was YES. [2024-06-27 18:19:55,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12228 conditions, 5401 events. 3177/5401 cut-off events. For 2275/2275 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 35127 event pairs, 2153 based on Foata normal form. 3/5227 useless extension candidates. Maximal degree in co-relation 12213. Up to 4552 conditions per place. [2024-06-27 18:19:55,239 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 60 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-27 18:19:55,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 84 transitions, 415 flow [2024-06-27 18:19:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:19:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:19:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 18:19:55,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6163265306122448 [2024-06-27 18:19:55,243 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 187 flow. Second operand 5 states and 151 transitions. [2024-06-27 18:19:55,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 84 transitions, 415 flow [2024-06-27 18:19:55,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 404 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 18:19:55,249 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 228 flow [2024-06-27 18:19:55,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-27 18:19:55,251 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-27 18:19:55,251 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 228 flow [2024-06-27 18:19:55,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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 18:19:55,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:55,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:19:55,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:19:55,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:55,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash -727354502, now seen corresponding path program 1 times [2024-06-27 18:19:55,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:55,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779698115] [2024-06-27 18:19:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:55,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:56,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:56,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779698115] [2024-06-27 18:19:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779698115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:56,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:56,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:19:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550292319] [2024-06-27 18:19:56,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:56,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:19:56,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:19:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:19:56,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-06-27 18:19:56,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:56,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:56,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-06-27 18:19:56,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:57,655 INFO L124 PetriNetUnfolderBase]: 3176/5396 cut-off events. [2024-06-27 18:19:57,655 INFO L125 PetriNetUnfolderBase]: For 4158/4158 co-relation queries the response was YES. [2024-06-27 18:19:57,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13146 conditions, 5396 events. 3176/5396 cut-off events. For 4158/4158 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 35087 event pairs, 1579 based on Foata normal form. 3/5193 useless extension candidates. Maximal degree in co-relation 13129. Up to 4529 conditions per place. [2024-06-27 18:19:57,699 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 70 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2024-06-27 18:19:57,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 512 flow [2024-06-27 18:19:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:19:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:19:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 18:19:57,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 18:19:57,704 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 228 flow. Second operand 6 states and 180 transitions. [2024-06-27 18:19:57,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 512 flow [2024-06-27 18:19:57,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 486 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 18:19:57,715 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 264 flow [2024-06-27 18:19:57,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-27 18:19:57,717 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-27 18:19:57,717 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 264 flow [2024-06-27 18:19:57,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:57,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:57,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:19:57,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:19:57,718 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:57,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:57,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1397150315, now seen corresponding path program 1 times [2024-06-27 18:19:57,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:57,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307948944] [2024-06-27 18:19:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:57,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:19:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:19:58,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:19:58,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307948944] [2024-06-27 18:19:58,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307948944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:19:58,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:19:58,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:19:58,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212352661] [2024-06-27 18:19:58,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:19:58,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:19:58,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:19:58,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:19:58,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:19:58,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:19:58,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 264 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:58,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:58,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:19:58,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:59,582 INFO L124 PetriNetUnfolderBase]: 4059/6972 cut-off events. [2024-06-27 18:19:59,582 INFO L125 PetriNetUnfolderBase]: For 8097/8101 co-relation queries the response was YES. [2024-06-27 18:19:59,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17623 conditions, 6972 events. 4059/6972 cut-off events. For 8097/8101 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 47201 event pairs, 2245 based on Foata normal form. 8/6779 useless extension candidates. Maximal degree in co-relation 17604. Up to 5822 conditions per place. [2024-06-27 18:19:59,638 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 58 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-27 18:19:59,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 464 flow [2024-06-27 18:19:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:19:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:19:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 18:19:59,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-06-27 18:19:59,640 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 264 flow. Second operand 5 states and 130 transitions. [2024-06-27 18:19:59,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 464 flow [2024-06-27 18:19:59,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 428 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 18:19:59,649 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 281 flow [2024-06-27 18:19:59,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-27 18:19:59,651 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2024-06-27 18:19:59,651 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 281 flow [2024-06-27 18:19:59,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:59,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:19:59,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:19:59,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:19:59,652 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:19:59,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:19:59,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1092021753, now seen corresponding path program 1 times [2024-06-27 18:19:59,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:19:59,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710937614] [2024-06-27 18:19:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:19:59,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:19:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:01,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:01,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710937614] [2024-06-27 18:20:01,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710937614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:01,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:01,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:20:01,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723711652] [2024-06-27 18:20:01,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:01,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:20:01,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:01,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:20:01,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:20:02,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:20:02,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 281 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:02,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:02,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:20:02,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:02,847 INFO L124 PetriNetUnfolderBase]: 3643/5641 cut-off events. [2024-06-27 18:20:02,847 INFO L125 PetriNetUnfolderBase]: For 9286/9286 co-relation queries the response was YES. [2024-06-27 18:20:02,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16249 conditions, 5641 events. 3643/5641 cut-off events. For 9286/9286 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 33302 event pairs, 1270 based on Foata normal form. 3/5615 useless extension candidates. Maximal degree in co-relation 16229. Up to 5134 conditions per place. [2024-06-27 18:20:02,889 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 93 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-27 18:20:02,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 138 transitions, 819 flow [2024-06-27 18:20:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:20:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:20:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 18:20:02,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-27 18:20:02,891 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 281 flow. Second operand 8 states and 232 transitions. [2024-06-27 18:20:02,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 138 transitions, 819 flow [2024-06-27 18:20:02,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 138 transitions, 792 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 18:20:02,897 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 509 flow [2024-06-27 18:20:02,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=509, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-27 18:20:02,898 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-27 18:20:02,898 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 509 flow [2024-06-27 18:20:02,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:02,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:02,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:02,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:20:02,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:02,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash 453254701, now seen corresponding path program 1 times [2024-06-27 18:20:02,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:02,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204583514] [2024-06-27 18:20:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:02,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:03,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:03,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204583514] [2024-06-27 18:20:03,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204583514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:03,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:03,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:20:03,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911481063] [2024-06-27 18:20:03,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:03,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:20:03,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:03,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:20:03,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:20:03,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:20:03,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 509 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:03,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:03,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:20:03,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:04,847 INFO L124 PetriNetUnfolderBase]: 4138/7037 cut-off events. [2024-06-27 18:20:04,848 INFO L125 PetriNetUnfolderBase]: For 15472/15477 co-relation queries the response was YES. [2024-06-27 18:20:04,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20906 conditions, 7037 events. 4138/7037 cut-off events. For 15472/15477 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 46686 event pairs, 1500 based on Foata normal form. 9/6808 useless extension candidates. Maximal degree in co-relation 20881. Up to 5853 conditions per place. [2024-06-27 18:20:04,888 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 90 selfloop transitions, 18 changer transitions 0/121 dead transitions. [2024-06-27 18:20:04,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 121 transitions, 889 flow [2024-06-27 18:20:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:20:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:20:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 18:20:04,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-27 18:20:04,891 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 509 flow. Second operand 6 states and 162 transitions. [2024-06-27 18:20:04,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 121 transitions, 889 flow [2024-06-27 18:20:04,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 121 transitions, 808 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-27 18:20:04,906 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 556 flow [2024-06-27 18:20:04,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=556, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2024-06-27 18:20:04,908 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-27 18:20:04,909 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 556 flow [2024-06-27 18:20:04,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:04,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:04,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:04,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:20:04,909 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:04,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:04,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1688901351, now seen corresponding path program 2 times [2024-06-27 18:20:04,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:04,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084408297] [2024-06-27 18:20:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:04,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:05,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:05,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084408297] [2024-06-27 18:20:05,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084408297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:05,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:05,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:20:05,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106200286] [2024-06-27 18:20:05,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:05,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:20:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:05,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:20:05,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:20:05,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-06-27 18:20:05,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 89 transitions, 556 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:05,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:05,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-06-27 18:20:05,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:06,815 INFO L124 PetriNetUnfolderBase]: 4122/7053 cut-off events. [2024-06-27 18:20:06,815 INFO L125 PetriNetUnfolderBase]: For 20377/20387 co-relation queries the response was YES. [2024-06-27 18:20:06,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22615 conditions, 7053 events. 4122/7053 cut-off events. For 20377/20387 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 47562 event pairs, 1742 based on Foata normal form. 14/6863 useless extension candidates. Maximal degree in co-relation 22586. Up to 5900 conditions per place. [2024-06-27 18:20:06,883 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 87 selfloop transitions, 13 changer transitions 0/113 dead transitions. [2024-06-27 18:20:06,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 113 transitions, 818 flow [2024-06-27 18:20:06,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:20:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:20:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 18:20:06,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-27 18:20:06,885 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 556 flow. Second operand 6 states and 153 transitions. [2024-06-27 18:20:06,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 113 transitions, 818 flow [2024-06-27 18:20:06,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 113 transitions, 788 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 18:20:06,899 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 560 flow [2024-06-27 18:20:06,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=560, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-27 18:20:06,901 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-27 18:20:06,901 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 560 flow [2024-06-27 18:20:06,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:06,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:06,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:06,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:20:06,903 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:06,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash -507063060, now seen corresponding path program 1 times [2024-06-27 18:20:06,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:06,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244364006] [2024-06-27 18:20:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:09,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:09,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244364006] [2024-06-27 18:20:09,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244364006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:09,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:09,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:20:09,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340158266] [2024-06-27 18:20:09,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:09,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:20:09,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:09,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:20:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:20:09,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-06-27 18:20:09,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 560 flow. Second operand has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 9 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:09,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:09,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-06-27 18:20:09,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:10,352 INFO L124 PetriNetUnfolderBase]: 3694/5691 cut-off events. [2024-06-27 18:20:10,352 INFO L125 PetriNetUnfolderBase]: For 19913/19913 co-relation queries the response was YES. [2024-06-27 18:20:10,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20142 conditions, 5691 events. 3694/5691 cut-off events. For 19913/19913 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 33587 event pairs, 931 based on Foata normal form. 6/5665 useless extension candidates. Maximal degree in co-relation 20111. Up to 5161 conditions per place. [2024-06-27 18:20:10,392 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 110 selfloop transitions, 35 changer transitions 0/157 dead transitions. [2024-06-27 18:20:10,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 157 transitions, 1050 flow [2024-06-27 18:20:10,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:20:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:20:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 256 transitions. [2024-06-27 18:20:10,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804988662131519 [2024-06-27 18:20:10,394 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 560 flow. Second operand 9 states and 256 transitions. [2024-06-27 18:20:10,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 157 transitions, 1050 flow [2024-06-27 18:20:10,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 157 transitions, 1007 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 18:20:10,413 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 614 flow [2024-06-27 18:20:10,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=614, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2024-06-27 18:20:10,415 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-27 18:20:10,415 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 614 flow [2024-06-27 18:20:10,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 9 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:10,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:10,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:10,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:20:10,416 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:10,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:10,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1165815914, now seen corresponding path program 1 times [2024-06-27 18:20:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:10,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101768752] [2024-06-27 18:20:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:10,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:11,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:11,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101768752] [2024-06-27 18:20:11,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101768752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:11,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:11,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:20:11,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540770976] [2024-06-27 18:20:11,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:11,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:20:11,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:11,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:20:11,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:20:11,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:11,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 614 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:11,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:11,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:11,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:12,393 INFO L124 PetriNetUnfolderBase]: 4384/7122 cut-off events. [2024-06-27 18:20:12,393 INFO L125 PetriNetUnfolderBase]: For 27423/27423 co-relation queries the response was YES. [2024-06-27 18:20:12,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24687 conditions, 7122 events. 4384/7122 cut-off events. For 27423/27423 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 45247 event pairs, 1382 based on Foata normal form. 4/6937 useless extension candidates. Maximal degree in co-relation 24656. Up to 6061 conditions per place. [2024-06-27 18:20:12,444 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 104 selfloop transitions, 26 changer transitions 0/140 dead transitions. [2024-06-27 18:20:12,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 140 transitions, 1090 flow [2024-06-27 18:20:12,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:20:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:20:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 18:20:12,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393586005830904 [2024-06-27 18:20:12,447 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 614 flow. Second operand 7 states and 185 transitions. [2024-06-27 18:20:12,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 140 transitions, 1090 flow [2024-06-27 18:20:12,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 140 transitions, 999 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 18:20:12,474 INFO L231 Difference]: Finished difference. Result has 88 places, 96 transitions, 649 flow [2024-06-27 18:20:12,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=649, PETRI_PLACES=88, PETRI_TRANSITIONS=96} [2024-06-27 18:20:12,475 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-27 18:20:12,475 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 96 transitions, 649 flow [2024-06-27 18:20:12,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:12,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:12,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:12,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:20:12,476 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:12,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:12,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1165995404, now seen corresponding path program 2 times [2024-06-27 18:20:12,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:12,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101823342] [2024-06-27 18:20:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:12,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:13,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101823342] [2024-06-27 18:20:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101823342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:13,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:13,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:20:13,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690344094] [2024-06-27 18:20:13,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:13,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:20:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:13,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:20:13,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:20:13,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:13,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 96 transitions, 649 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:13,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:13,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:13,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:14,538 INFO L124 PetriNetUnfolderBase]: 4430/7192 cut-off events. [2024-06-27 18:20:14,538 INFO L125 PetriNetUnfolderBase]: For 33194/33194 co-relation queries the response was YES. [2024-06-27 18:20:14,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25960 conditions, 7192 events. 4430/7192 cut-off events. For 33194/33194 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 45585 event pairs, 1395 based on Foata normal form. 4/7006 useless extension candidates. Maximal degree in co-relation 25927. Up to 6100 conditions per place. [2024-06-27 18:20:14,591 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 102 selfloop transitions, 28 changer transitions 0/140 dead transitions. [2024-06-27 18:20:14,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 140 transitions, 1097 flow [2024-06-27 18:20:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:20:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:20:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 18:20:14,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335276967930029 [2024-06-27 18:20:14,594 INFO L175 Difference]: Start difference. First operand has 88 places, 96 transitions, 649 flow. Second operand 7 states and 183 transitions. [2024-06-27 18:20:14,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 140 transitions, 1097 flow [2024-06-27 18:20:14,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 140 transitions, 1045 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 18:20:14,625 INFO L231 Difference]: Finished difference. Result has 92 places, 99 transitions, 697 flow [2024-06-27 18:20:14,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=697, PETRI_PLACES=92, PETRI_TRANSITIONS=99} [2024-06-27 18:20:14,626 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-27 18:20:14,626 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 99 transitions, 697 flow [2024-06-27 18:20:14,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:14,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:14,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:14,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:20:14,627 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:14,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:14,627 INFO L85 PathProgramCache]: Analyzing trace with hash 816335890, now seen corresponding path program 3 times [2024-06-27 18:20:14,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:14,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389806960] [2024-06-27 18:20:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:14,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:15,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:15,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389806960] [2024-06-27 18:20:15,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389806960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:15,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:15,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:20:15,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012340081] [2024-06-27 18:20:15,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:15,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:20:15,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:20:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:20:15,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:15,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 99 transitions, 697 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:15,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:15,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:15,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:16,470 INFO L124 PetriNetUnfolderBase]: 4420/7222 cut-off events. [2024-06-27 18:20:16,470 INFO L125 PetriNetUnfolderBase]: For 36032/36032 co-relation queries the response was YES. [2024-06-27 18:20:16,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26239 conditions, 7222 events. 4420/7222 cut-off events. For 36032/36032 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 46550 event pairs, 1678 based on Foata normal form. 4/7058 useless extension candidates. Maximal degree in co-relation 26204. Up to 6247 conditions per place. [2024-06-27 18:20:16,521 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 106 selfloop transitions, 16 changer transitions 0/132 dead transitions. [2024-06-27 18:20:16,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 132 transitions, 1029 flow [2024-06-27 18:20:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:20:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:20:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:20:16,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2024-06-27 18:20:16,523 INFO L175 Difference]: Start difference. First operand has 92 places, 99 transitions, 697 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:20:16,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 132 transitions, 1029 flow [2024-06-27 18:20:16,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 132 transitions, 957 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 18:20:16,664 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 665 flow [2024-06-27 18:20:16,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-06-27 18:20:16,665 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2024-06-27 18:20:16,666 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 665 flow [2024-06-27 18:20:16,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:16,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:16,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:16,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:20:16,666 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:16,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1689947099, now seen corresponding path program 1 times [2024-06-27 18:20:16,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:16,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271712014] [2024-06-27 18:20:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:16,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:17,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:17,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271712014] [2024-06-27 18:20:17,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271712014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:17,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:17,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:20:17,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013930132] [2024-06-27 18:20:17,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:17,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:20:17,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:20:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:20:17,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:17,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 665 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:17,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:17,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:17,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:18,919 INFO L124 PetriNetUnfolderBase]: 5147/8412 cut-off events. [2024-06-27 18:20:18,920 INFO L125 PetriNetUnfolderBase]: For 43376/43386 co-relation queries the response was YES. [2024-06-27 18:20:18,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29506 conditions, 8412 events. 5147/8412 cut-off events. For 43376/43386 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 55145 event pairs, 2056 based on Foata normal form. 14/8221 useless extension candidates. Maximal degree in co-relation 29470. Up to 7261 conditions per place. [2024-06-27 18:20:18,982 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 107 selfloop transitions, 20 changer transitions 0/142 dead transitions. [2024-06-27 18:20:18,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 142 transitions, 1078 flow [2024-06-27 18:20:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:20:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:20:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:20:18,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-06-27 18:20:18,984 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 665 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:20:18,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 142 transitions, 1078 flow [2024-06-27 18:20:19,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 142 transitions, 1011 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 18:20:19,016 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 721 flow [2024-06-27 18:20:19,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=721, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2024-06-27 18:20:19,016 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-27 18:20:19,017 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 721 flow [2024-06-27 18:20:19,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:19,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:19,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:19,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:20:19,017 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:19,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1332515057, now seen corresponding path program 1 times [2024-06-27 18:20:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020496136] [2024-06-27 18:20:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:19,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020496136] [2024-06-27 18:20:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020496136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:19,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:19,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:20:19,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785681274] [2024-06-27 18:20:19,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:19,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:20:19,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:19,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:20:19,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:20:19,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:19,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 721 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 18:20:19,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:19,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:19,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:20,814 INFO L124 PetriNetUnfolderBase]: 5664/9262 cut-off events. [2024-06-27 18:20:20,814 INFO L125 PetriNetUnfolderBase]: For 55235/55247 co-relation queries the response was YES. [2024-06-27 18:20:20,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33649 conditions, 9262 events. 5664/9262 cut-off events. For 55235/55247 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 61376 event pairs, 2509 based on Foata normal form. 13/9033 useless extension candidates. Maximal degree in co-relation 33611. Up to 8154 conditions per place. [2024-06-27 18:20:20,881 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 97 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-27 18:20:20,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 124 transitions, 999 flow [2024-06-27 18:20:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:20:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:20:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 18:20:20,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 18:20:20,883 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 721 flow. Second operand 5 states and 120 transitions. [2024-06-27 18:20:20,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 124 transitions, 999 flow [2024-06-27 18:20:20,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 124 transitions, 942 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 18:20:20,922 INFO L231 Difference]: Finished difference. Result has 97 places, 109 transitions, 723 flow [2024-06-27 18:20:20,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=723, PETRI_PLACES=97, PETRI_TRANSITIONS=109} [2024-06-27 18:20:20,923 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-27 18:20:20,923 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 109 transitions, 723 flow [2024-06-27 18:20:20,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 18:20:20,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:20,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:20,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:20:20,924 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:20,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:20,925 INFO L85 PathProgramCache]: Analyzing trace with hash -483012824, now seen corresponding path program 1 times [2024-06-27 18:20:20,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:20,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845616784] [2024-06-27 18:20:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:20,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:22,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:22,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845616784] [2024-06-27 18:20:22,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845616784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:22,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:22,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:20:22,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894971787] [2024-06-27 18:20:22,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:22,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:20:22,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:20:22,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:20:22,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:22,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 109 transitions, 723 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:22,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:22,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:22,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:23,298 INFO L124 PetriNetUnfolderBase]: 5416/8668 cut-off events. [2024-06-27 18:20:23,298 INFO L125 PetriNetUnfolderBase]: For 60257/60263 co-relation queries the response was YES. [2024-06-27 18:20:23,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33497 conditions, 8668 events. 5416/8668 cut-off events. For 60257/60263 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 55741 event pairs, 1655 based on Foata normal form. 4/8409 useless extension candidates. Maximal degree in co-relation 33458. Up to 7276 conditions per place. [2024-06-27 18:20:23,357 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 121 selfloop transitions, 39 changer transitions 0/172 dead transitions. [2024-06-27 18:20:23,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 172 transitions, 1325 flow [2024-06-27 18:20:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:20:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:20:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 18:20:23,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459183673469388 [2024-06-27 18:20:23,359 INFO L175 Difference]: Start difference. First operand has 97 places, 109 transitions, 723 flow. Second operand 8 states and 214 transitions. [2024-06-27 18:20:23,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 172 transitions, 1325 flow [2024-06-27 18:20:23,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 172 transitions, 1290 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:20:23,411 INFO L231 Difference]: Finished difference. Result has 103 places, 116 transitions, 866 flow [2024-06-27 18:20:23,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=866, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2024-06-27 18:20:23,412 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-27 18:20:23,412 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 866 flow [2024-06-27 18:20:23,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:23,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:23,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:23,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:20:23,413 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:23,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1780556558, now seen corresponding path program 2 times [2024-06-27 18:20:23,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:23,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136980459] [2024-06-27 18:20:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:23,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:24,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:24,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136980459] [2024-06-27 18:20:24,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136980459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:24,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:24,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:20:24,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962070440] [2024-06-27 18:20:24,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:24,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:20:24,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:20:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:20:24,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:24,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 866 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:24,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:24,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:24,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:25,805 INFO L124 PetriNetUnfolderBase]: 5462/8756 cut-off events. [2024-06-27 18:20:25,805 INFO L125 PetriNetUnfolderBase]: For 69199/69205 co-relation queries the response was YES. [2024-06-27 18:20:25,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35477 conditions, 8756 events. 5462/8756 cut-off events. For 69199/69205 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 56588 event pairs, 1658 based on Foata normal form. 4/8489 useless extension candidates. Maximal degree in co-relation 35436. Up to 7315 conditions per place. [2024-06-27 18:20:25,854 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 120 selfloop transitions, 40 changer transitions 0/172 dead transitions. [2024-06-27 18:20:25,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 172 transitions, 1433 flow [2024-06-27 18:20:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:20:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:20:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:20:25,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-06-27 18:20:25,861 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 866 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:20:25,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 172 transitions, 1433 flow [2024-06-27 18:20:25,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 172 transitions, 1352 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 18:20:25,924 INFO L231 Difference]: Finished difference. Result has 107 places, 119 transitions, 916 flow [2024-06-27 18:20:25,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=916, PETRI_PLACES=107, PETRI_TRANSITIONS=119} [2024-06-27 18:20:25,925 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-27 18:20:25,926 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 119 transitions, 916 flow [2024-06-27 18:20:25,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:25,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:25,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:25,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:20:25,927 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:25,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:25,927 INFO L85 PathProgramCache]: Analyzing trace with hash -477298904, now seen corresponding path program 3 times [2024-06-27 18:20:25,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:25,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045792952] [2024-06-27 18:20:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:25,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:27,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:27,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045792952] [2024-06-27 18:20:27,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045792952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:27,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:27,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:20:27,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983245485] [2024-06-27 18:20:27,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:27,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:20:27,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:20:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:20:27,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:27,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 119 transitions, 916 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:27,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:27,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:27,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:28,390 INFO L124 PetriNetUnfolderBase]: 5567/8932 cut-off events. [2024-06-27 18:20:28,390 INFO L125 PetriNetUnfolderBase]: For 75732/75736 co-relation queries the response was YES. [2024-06-27 18:20:28,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36850 conditions, 8932 events. 5567/8932 cut-off events. For 75732/75736 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 57729 event pairs, 1580 based on Foata normal form. 4/8669 useless extension candidates. Maximal degree in co-relation 36807. Up to 7398 conditions per place. [2024-06-27 18:20:28,451 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 118 selfloop transitions, 42 changer transitions 0/172 dead transitions. [2024-06-27 18:20:28,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 172 transitions, 1477 flow [2024-06-27 18:20:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:20:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:20:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:20:28,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 18:20:28,456 INFO L175 Difference]: Start difference. First operand has 107 places, 119 transitions, 916 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:20:28,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 172 transitions, 1477 flow [2024-06-27 18:20:28,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 172 transitions, 1393 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 18:20:28,515 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 965 flow [2024-06-27 18:20:28,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=965, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-06-27 18:20:28,516 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-27 18:20:28,516 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 965 flow [2024-06-27 18:20:28,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:28,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:28,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:28,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:20:28,517 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:28,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash -951637238, now seen corresponding path program 1 times [2024-06-27 18:20:28,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:28,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906540544] [2024-06-27 18:20:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:28,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:29,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:29,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906540544] [2024-06-27 18:20:29,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906540544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:29,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:29,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:20:29,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845725248] [2024-06-27 18:20:29,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:29,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:20:29,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:20:29,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:20:29,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:29,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 965 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:29,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:29,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:29,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:30,776 INFO L124 PetriNetUnfolderBase]: 5625/8877 cut-off events. [2024-06-27 18:20:30,776 INFO L125 PetriNetUnfolderBase]: For 84896/84928 co-relation queries the response was YES. [2024-06-27 18:20:30,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37547 conditions, 8877 events. 5625/8877 cut-off events. For 84896/84928 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 56478 event pairs, 2146 based on Foata normal form. 16/8662 useless extension candidates. Maximal degree in co-relation 37503. Up to 7832 conditions per place. [2024-06-27 18:20:30,844 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 125 selfloop transitions, 23 changer transitions 0/164 dead transitions. [2024-06-27 18:20:30,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 164 transitions, 1443 flow [2024-06-27 18:20:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:20:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:20:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:20:30,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2024-06-27 18:20:30,845 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 965 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:20:30,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 164 transitions, 1443 flow [2024-06-27 18:20:30,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 164 transitions, 1356 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 18:20:30,904 INFO L231 Difference]: Finished difference. Result has 114 places, 134 transitions, 1077 flow [2024-06-27 18:20:30,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1077, PETRI_PLACES=114, PETRI_TRANSITIONS=134} [2024-06-27 18:20:30,905 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-27 18:20:30,905 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 134 transitions, 1077 flow [2024-06-27 18:20:30,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:30,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:30,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:30,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:20:30,906 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:30,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash -859217176, now seen corresponding path program 4 times [2024-06-27 18:20:30,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:30,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067212981] [2024-06-27 18:20:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:30,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:31,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:31,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067212981] [2024-06-27 18:20:31,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067212981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:31,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:31,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:20:31,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672991395] [2024-06-27 18:20:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:31,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:20:31,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:31,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:20:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:20:32,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:32,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 134 transitions, 1077 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:32,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:32,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:32,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:33,218 INFO L124 PetriNetUnfolderBase]: 5616/8858 cut-off events. [2024-06-27 18:20:33,218 INFO L125 PetriNetUnfolderBase]: For 90700/90700 co-relation queries the response was YES. [2024-06-27 18:20:33,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38348 conditions, 8858 events. 5616/8858 cut-off events. For 90700/90700 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 56798 event pairs, 1922 based on Foata normal form. 6/8683 useless extension candidates. Maximal degree in co-relation 38301. Up to 7717 conditions per place. [2024-06-27 18:20:33,290 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 138 selfloop transitions, 25 changer transitions 0/176 dead transitions. [2024-06-27 18:20:33,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 176 transitions, 1523 flow [2024-06-27 18:20:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:20:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:20:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 18:20:33,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025510204081632 [2024-06-27 18:20:33,291 INFO L175 Difference]: Start difference. First operand has 114 places, 134 transitions, 1077 flow. Second operand 8 states and 197 transitions. [2024-06-27 18:20:33,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 176 transitions, 1523 flow [2024-06-27 18:20:33,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1460 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 18:20:33,377 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1072 flow [2024-06-27 18:20:33,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1072, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2024-06-27 18:20:33,378 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-27 18:20:33,378 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1072 flow [2024-06-27 18:20:33,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:33,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:33,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:33,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:20:33,379 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:33,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1656004898, now seen corresponding path program 1 times [2024-06-27 18:20:33,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:33,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287277092] [2024-06-27 18:20:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:34,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:34,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287277092] [2024-06-27 18:20:34,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287277092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:34,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:34,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:20:34,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084794863] [2024-06-27 18:20:34,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:34,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:20:34,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:20:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:20:34,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:34,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1072 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:34,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:34,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:34,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:35,549 INFO L124 PetriNetUnfolderBase]: 5829/9123 cut-off events. [2024-06-27 18:20:35,549 INFO L125 PetriNetUnfolderBase]: For 97359/97384 co-relation queries the response was YES. [2024-06-27 18:20:35,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39434 conditions, 9123 events. 5829/9123 cut-off events. For 97359/97384 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 57017 event pairs, 2421 based on Foata normal form. 17/8978 useless extension candidates. Maximal degree in co-relation 39386. Up to 8263 conditions per place. [2024-06-27 18:20:35,600 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 124 selfloop transitions, 14 changer transitions 0/159 dead transitions. [2024-06-27 18:20:35,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 159 transitions, 1436 flow [2024-06-27 18:20:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:20:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:20:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 18:20:35,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-27 18:20:35,601 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1072 flow. Second operand 6 states and 143 transitions. [2024-06-27 18:20:35,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 159 transitions, 1436 flow [2024-06-27 18:20:35,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 159 transitions, 1384 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 18:20:35,650 INFO L231 Difference]: Finished difference. Result has 119 places, 137 transitions, 1088 flow [2024-06-27 18:20:35,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1088, PETRI_PLACES=119, PETRI_TRANSITIONS=137} [2024-06-27 18:20:35,650 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-27 18:20:35,651 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 137 transitions, 1088 flow [2024-06-27 18:20:35,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:35,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:35,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:35,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:20:35,651 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:35,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:35,651 INFO L85 PathProgramCache]: Analyzing trace with hash -642081527, now seen corresponding path program 1 times [2024-06-27 18:20:35,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:35,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239478436] [2024-06-27 18:20:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:35,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:36,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:36,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239478436] [2024-06-27 18:20:36,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239478436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:36,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:36,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:20:36,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012738175] [2024-06-27 18:20:36,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:36,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:20:36,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:36,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:20:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:20:37,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:37,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 137 transitions, 1088 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:37,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:37,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:37,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:38,212 INFO L124 PetriNetUnfolderBase]: 5681/8859 cut-off events. [2024-06-27 18:20:38,212 INFO L125 PetriNetUnfolderBase]: For 103591/103597 co-relation queries the response was YES. [2024-06-27 18:20:38,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40148 conditions, 8859 events. 5681/8859 cut-off events. For 103591/103597 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 55583 event pairs, 1690 based on Foata normal form. 8/8698 useless extension candidates. Maximal degree in co-relation 40099. Up to 7910 conditions per place. [2024-06-27 18:20:38,279 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 168 selfloop transitions, 21 changer transitions 0/202 dead transitions. [2024-06-27 18:20:38,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 202 transitions, 1688 flow [2024-06-27 18:20:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:20:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:20:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:20:38,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260770975056689 [2024-06-27 18:20:38,280 INFO L175 Difference]: Start difference. First operand has 119 places, 137 transitions, 1088 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:20:38,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 202 transitions, 1688 flow [2024-06-27 18:20:38,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 202 transitions, 1642 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 18:20:38,345 INFO L231 Difference]: Finished difference. Result has 124 places, 140 transitions, 1142 flow [2024-06-27 18:20:38,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1142, PETRI_PLACES=124, PETRI_TRANSITIONS=140} [2024-06-27 18:20:38,345 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-27 18:20:38,345 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 140 transitions, 1142 flow [2024-06-27 18:20:38,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:38,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:38,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:38,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:20:38,346 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:38,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash -641961557, now seen corresponding path program 2 times [2024-06-27 18:20:38,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:38,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45028886] [2024-06-27 18:20:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:38,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:39,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:39,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45028886] [2024-06-27 18:20:39,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45028886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:39,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:39,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:20:39,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534306713] [2024-06-27 18:20:39,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:39,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:20:39,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:39,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:20:39,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:20:39,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:39,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 140 transitions, 1142 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:39,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:39,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:39,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:41,002 INFO L124 PetriNetUnfolderBase]: 5761/8933 cut-off events. [2024-06-27 18:20:41,002 INFO L125 PetriNetUnfolderBase]: For 115546/115550 co-relation queries the response was YES. [2024-06-27 18:20:41,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41996 conditions, 8933 events. 5761/8933 cut-off events. For 115546/115550 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 55647 event pairs, 1400 based on Foata normal form. 8/8785 useless extension candidates. Maximal degree in co-relation 41946. Up to 7408 conditions per place. [2024-06-27 18:20:41,083 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 141 selfloop transitions, 57 changer transitions 0/211 dead transitions. [2024-06-27 18:20:41,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 211 transitions, 1908 flow [2024-06-27 18:20:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:20:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:20:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 18:20:41,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546485260770975 [2024-06-27 18:20:41,085 INFO L175 Difference]: Start difference. First operand has 124 places, 140 transitions, 1142 flow. Second operand 9 states and 241 transitions. [2024-06-27 18:20:41,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 211 transitions, 1908 flow [2024-06-27 18:20:41,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 211 transitions, 1780 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 18:20:41,183 INFO L231 Difference]: Finished difference. Result has 124 places, 146 transitions, 1242 flow [2024-06-27 18:20:41,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1242, PETRI_PLACES=124, PETRI_TRANSITIONS=146} [2024-06-27 18:20:41,184 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-27 18:20:41,184 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 146 transitions, 1242 flow [2024-06-27 18:20:41,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:41,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:41,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:41,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:20:41,185 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:41,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:41,185 INFO L85 PathProgramCache]: Analyzing trace with hash -637319927, now seen corresponding path program 3 times [2024-06-27 18:20:41,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:41,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849320354] [2024-06-27 18:20:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:41,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:42,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:42,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849320354] [2024-06-27 18:20:42,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849320354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:42,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:42,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:20:42,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641194722] [2024-06-27 18:20:42,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:42,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:20:42,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:42,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:20:42,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:20:42,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:42,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 146 transitions, 1242 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:42,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:42,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:42,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:43,765 INFO L124 PetriNetUnfolderBase]: 5807/8974 cut-off events. [2024-06-27 18:20:43,765 INFO L125 PetriNetUnfolderBase]: For 128756/128760 co-relation queries the response was YES. [2024-06-27 18:20:43,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43688 conditions, 8974 events. 5807/8974 cut-off events. For 128756/128760 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 55596 event pairs, 1408 based on Foata normal form. 8/8834 useless extension candidates. Maximal degree in co-relation 43637. Up to 7447 conditions per place. [2024-06-27 18:20:43,844 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 140 selfloop transitions, 58 changer transitions 0/211 dead transitions. [2024-06-27 18:20:43,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 211 transitions, 1960 flow [2024-06-27 18:20:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:20:43,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:20:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-27 18:20:43,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5419501133786848 [2024-06-27 18:20:43,845 INFO L175 Difference]: Start difference. First operand has 124 places, 146 transitions, 1242 flow. Second operand 9 states and 239 transitions. [2024-06-27 18:20:43,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 211 transitions, 1960 flow [2024-06-27 18:20:43,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 211 transitions, 1850 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 18:20:43,949 INFO L231 Difference]: Finished difference. Result has 128 places, 149 transitions, 1312 flow [2024-06-27 18:20:43,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1312, PETRI_PLACES=128, PETRI_TRANSITIONS=149} [2024-06-27 18:20:43,949 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-27 18:20:43,949 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 149 transitions, 1312 flow [2024-06-27 18:20:43,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:43,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:43,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:43,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:20:43,950 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:43,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:43,950 INFO L85 PathProgramCache]: Analyzing trace with hash 56366045, now seen corresponding path program 4 times [2024-06-27 18:20:43,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:43,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386471838] [2024-06-27 18:20:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:43,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:45,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:45,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386471838] [2024-06-27 18:20:45,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386471838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:45,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:45,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:20:45,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106911086] [2024-06-27 18:20:45,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:45,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:20:45,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:45,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:20:45,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:20:45,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:45,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 149 transitions, 1312 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:45,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:45,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:45,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:46,443 INFO L124 PetriNetUnfolderBase]: 5853/9080 cut-off events. [2024-06-27 18:20:46,443 INFO L125 PetriNetUnfolderBase]: For 136243/136247 co-relation queries the response was YES. [2024-06-27 18:20:46,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44693 conditions, 9080 events. 5853/9080 cut-off events. For 136243/136247 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 56756 event pairs, 1475 based on Foata normal form. 8/8930 useless extension candidates. Maximal degree in co-relation 44640. Up to 7486 conditions per place. [2024-06-27 18:20:46,523 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 139 selfloop transitions, 59 changer transitions 0/211 dead transitions. [2024-06-27 18:20:46,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 211 transitions, 2024 flow [2024-06-27 18:20:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:20:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:20:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 18:20:46,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-27 18:20:46,525 INFO L175 Difference]: Start difference. First operand has 128 places, 149 transitions, 1312 flow. Second operand 9 states and 237 transitions. [2024-06-27 18:20:46,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 211 transitions, 2024 flow [2024-06-27 18:20:46,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 211 transitions, 1895 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 18:20:46,650 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1363 flow [2024-06-27 18:20:46,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1363, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2024-06-27 18:20:46,651 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-27 18:20:46,651 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1363 flow [2024-06-27 18:20:46,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:46,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:46,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:46,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:20:46,652 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:46,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:46,652 INFO L85 PathProgramCache]: Analyzing trace with hash -464583773, now seen corresponding path program 1 times [2024-06-27 18:20:46,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:46,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871744455] [2024-06-27 18:20:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:46,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:48,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:48,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871744455] [2024-06-27 18:20:48,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871744455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:48,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:48,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:20:48,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213411472] [2024-06-27 18:20:48,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:48,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:20:48,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:48,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:20:48,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:20:48,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:48,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1363 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:48,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:48,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:48,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:49,606 INFO L124 PetriNetUnfolderBase]: 5943/9260 cut-off events. [2024-06-27 18:20:49,607 INFO L125 PetriNetUnfolderBase]: For 148859/148876 co-relation queries the response was YES. [2024-06-27 18:20:49,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46031 conditions, 9260 events. 5943/9260 cut-off events. For 148859/148876 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 57640 event pairs, 1793 based on Foata normal form. 15/9087 useless extension candidates. Maximal degree in co-relation 45977. Up to 8141 conditions per place. [2024-06-27 18:20:49,687 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 160 selfloop transitions, 29 changer transitions 0/205 dead transitions. [2024-06-27 18:20:49,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 205 transitions, 1945 flow [2024-06-27 18:20:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:20:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:20:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:20:49,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-27 18:20:49,689 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1363 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:20:49,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 205 transitions, 1945 flow [2024-06-27 18:20:49,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 205 transitions, 1814 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 18:20:49,820 INFO L231 Difference]: Finished difference. Result has 134 places, 157 transitions, 1371 flow [2024-06-27 18:20:49,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1371, PETRI_PLACES=134, PETRI_TRANSITIONS=157} [2024-06-27 18:20:49,821 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-27 18:20:49,821 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 157 transitions, 1371 flow [2024-06-27 18:20:49,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:49,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:49,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:49,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:20:49,821 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:49,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash 189184847, now seen corresponding path program 1 times [2024-06-27 18:20:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:49,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127410268] [2024-06-27 18:20:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:50,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:50,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127410268] [2024-06-27 18:20:50,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127410268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:50,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:50,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:20:50,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486290890] [2024-06-27 18:20:50,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:50,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:20:50,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:50,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:20:50,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:20:50,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:50,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 157 transitions, 1371 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:50,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:50,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:50,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:51,792 INFO L124 PetriNetUnfolderBase]: 6096/9361 cut-off events. [2024-06-27 18:20:51,792 INFO L125 PetriNetUnfolderBase]: For 159911/159992 co-relation queries the response was YES. [2024-06-27 18:20:51,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46839 conditions, 9361 events. 6096/9361 cut-off events. For 159911/159992 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 57367 event pairs, 2066 based on Foata normal form. 17/9103 useless extension candidates. Maximal degree in co-relation 46783. Up to 8598 conditions per place. [2024-06-27 18:20:51,883 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 154 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-06-27 18:20:51,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 193 transitions, 1927 flow [2024-06-27 18:20:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:20:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:20:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 18:20:51,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2024-06-27 18:20:51,885 INFO L175 Difference]: Start difference. First operand has 134 places, 157 transitions, 1371 flow. Second operand 6 states and 149 transitions. [2024-06-27 18:20:51,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 193 transitions, 1927 flow [2024-06-27 18:20:52,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 193 transitions, 1836 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 18:20:52,011 INFO L231 Difference]: Finished difference. Result has 136 places, 167 transitions, 1434 flow [2024-06-27 18:20:52,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1434, PETRI_PLACES=136, PETRI_TRANSITIONS=167} [2024-06-27 18:20:52,012 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-27 18:20:52,012 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 167 transitions, 1434 flow [2024-06-27 18:20:52,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:52,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:52,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:52,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:20:52,013 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:52,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:52,013 INFO L85 PathProgramCache]: Analyzing trace with hash -865927057, now seen corresponding path program 5 times [2024-06-27 18:20:52,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:52,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337856562] [2024-06-27 18:20:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:52,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:53,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:53,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337856562] [2024-06-27 18:20:53,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337856562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:53,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:53,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:20:53,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003576361] [2024-06-27 18:20:53,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:53,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:20:53,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:53,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:20:53,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:20:53,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:53,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 167 transitions, 1434 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:53,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:53,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:53,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:54,487 INFO L124 PetriNetUnfolderBase]: 5970/9299 cut-off events. [2024-06-27 18:20:54,487 INFO L125 PetriNetUnfolderBase]: For 167375/167409 co-relation queries the response was YES. [2024-06-27 18:20:54,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47230 conditions, 9299 events. 5970/9299 cut-off events. For 167375/167409 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 58903 event pairs, 2003 based on Foata normal form. 6/9126 useless extension candidates. Maximal degree in co-relation 47172. Up to 8124 conditions per place. [2024-06-27 18:20:54,571 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 173 selfloop transitions, 28 changer transitions 0/218 dead transitions. [2024-06-27 18:20:54,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 218 transitions, 1992 flow [2024-06-27 18:20:54,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:20:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:20:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 18:20:54,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-27 18:20:54,573 INFO L175 Difference]: Start difference. First operand has 136 places, 167 transitions, 1434 flow. Second operand 9 states and 222 transitions. [2024-06-27 18:20:54,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 218 transitions, 1992 flow [2024-06-27 18:20:54,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 218 transitions, 1936 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-27 18:20:54,731 INFO L231 Difference]: Finished difference. Result has 144 places, 167 transitions, 1442 flow [2024-06-27 18:20:54,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1442, PETRI_PLACES=144, PETRI_TRANSITIONS=167} [2024-06-27 18:20:54,731 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-27 18:20:54,732 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 167 transitions, 1442 flow [2024-06-27 18:20:54,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:54,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:54,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:54,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:20:54,732 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:54,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:54,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1909346247, now seen corresponding path program 2 times [2024-06-27 18:20:54,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:54,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123344596] [2024-06-27 18:20:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:54,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:55,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:55,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123344596] [2024-06-27 18:20:55,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123344596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:55,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:55,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:20:55,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734939757] [2024-06-27 18:20:55,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:55,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:20:55,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:55,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:20:55,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:20:55,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:55,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 167 transitions, 1442 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:55,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:55,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:55,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:57,193 INFO L124 PetriNetUnfolderBase]: 6046/9484 cut-off events. [2024-06-27 18:20:57,193 INFO L125 PetriNetUnfolderBase]: For 180416/180462 co-relation queries the response was YES. [2024-06-27 18:20:57,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48785 conditions, 9484 events. 6046/9484 cut-off events. For 180416/180462 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 60095 event pairs, 2120 based on Foata normal form. 18/9290 useless extension candidates. Maximal degree in co-relation 48724. Up to 8382 conditions per place. [2024-06-27 18:20:57,275 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 168 selfloop transitions, 22 changer transitions 0/209 dead transitions. [2024-06-27 18:20:57,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 209 transitions, 1980 flow [2024-06-27 18:20:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:20:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:20:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 18:20:57,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2024-06-27 18:20:57,277 INFO L175 Difference]: Start difference. First operand has 144 places, 167 transitions, 1442 flow. Second operand 8 states and 193 transitions. [2024-06-27 18:20:57,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 209 transitions, 1980 flow [2024-06-27 18:20:57,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 209 transitions, 1843 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 18:20:57,405 INFO L231 Difference]: Finished difference. Result has 143 places, 172 transitions, 1434 flow [2024-06-27 18:20:57,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1434, PETRI_PLACES=143, PETRI_TRANSITIONS=172} [2024-06-27 18:20:57,405 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-06-27 18:20:57,405 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 172 transitions, 1434 flow [2024-06-27 18:20:57,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:57,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:20:57,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:20:57,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:20:57,406 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:20:57,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:20:57,407 INFO L85 PathProgramCache]: Analyzing trace with hash -552875293, now seen corresponding path program 3 times [2024-06-27 18:20:57,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:20:57,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009516032] [2024-06-27 18:20:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:20:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:20:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:20:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:20:58,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:20:58,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009516032] [2024-06-27 18:20:58,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009516032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:20:58,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:20:58,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:20:58,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042341634] [2024-06-27 18:20:58,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:20:58,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:20:58,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:20:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:20:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:20:58,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:20:58,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 172 transitions, 1434 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:20:58,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:20:58,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:20:58,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:20:59,936 INFO L124 PetriNetUnfolderBase]: 6083/9532 cut-off events. [2024-06-27 18:20:59,936 INFO L125 PetriNetUnfolderBase]: For 194842/194895 co-relation queries the response was YES. [2024-06-27 18:20:59,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49975 conditions, 9532 events. 6083/9532 cut-off events. For 194842/194895 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 60360 event pairs, 2156 based on Foata normal form. 18/9327 useless extension candidates. Maximal degree in co-relation 49912. Up to 8449 conditions per place. [2024-06-27 18:21:00,040 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 175 selfloop transitions, 19 changer transitions 0/213 dead transitions. [2024-06-27 18:21:00,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 213 transitions, 1984 flow [2024-06-27 18:21:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:21:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:21:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:21:00,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49489795918367346 [2024-06-27 18:21:00,041 INFO L175 Difference]: Start difference. First operand has 143 places, 172 transitions, 1434 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:21:00,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 213 transitions, 1984 flow [2024-06-27 18:21:00,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 213 transitions, 1897 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 18:21:00,181 INFO L231 Difference]: Finished difference. Result has 146 places, 174 transitions, 1446 flow [2024-06-27 18:21:00,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1446, PETRI_PLACES=146, PETRI_TRANSITIONS=174} [2024-06-27 18:21:00,182 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-27 18:21:00,182 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 174 transitions, 1446 flow [2024-06-27 18:21:00,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:00,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:00,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:00,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:21:00,183 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:00,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1909731577, now seen corresponding path program 1 times [2024-06-27 18:21:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:00,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943822655] [2024-06-27 18:21:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:01,190 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 18:21:01,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:01,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943822655] [2024-06-27 18:21:01,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943822655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:01,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:01,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:21:01,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406669564] [2024-06-27 18:21:01,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:01,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:21:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:01,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:21:01,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:21:01,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:21:01,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 174 transitions, 1446 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:01,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:01,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:21:01,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:02,749 INFO L124 PetriNetUnfolderBase]: 6452/9996 cut-off events. [2024-06-27 18:21:02,750 INFO L125 PetriNetUnfolderBase]: For 206744/206760 co-relation queries the response was YES. [2024-06-27 18:21:02,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52586 conditions, 9996 events. 6452/9996 cut-off events. For 206744/206760 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 62119 event pairs, 2204 based on Foata normal form. 2/9820 useless extension candidates. Maximal degree in co-relation 52522. Up to 8947 conditions per place. [2024-06-27 18:21:02,848 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 177 selfloop transitions, 29 changer transitions 0/219 dead transitions. [2024-06-27 18:21:02,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 219 transitions, 2054 flow [2024-06-27 18:21:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:21:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:21:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 18:21:02,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 18:21:02,849 INFO L175 Difference]: Start difference. First operand has 146 places, 174 transitions, 1446 flow. Second operand 8 states and 189 transitions. [2024-06-27 18:21:02,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 219 transitions, 2054 flow [2024-06-27 18:21:02,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 219 transitions, 1974 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 18:21:02,998 INFO L231 Difference]: Finished difference. Result has 149 places, 180 transitions, 1530 flow [2024-06-27 18:21:02,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1530, PETRI_PLACES=149, PETRI_TRANSITIONS=180} [2024-06-27 18:21:02,999 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-06-27 18:21:02,999 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 180 transitions, 1530 flow [2024-06-27 18:21:02,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:02,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:02,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:02,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:21:03,000 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:03,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:03,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1482547551, now seen corresponding path program 4 times [2024-06-27 18:21:03,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:03,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830803233] [2024-06-27 18:21:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:03,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:04,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:04,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830803233] [2024-06-27 18:21:04,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830803233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:04,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:04,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:21:04,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612949623] [2024-06-27 18:21:04,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:04,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:21:04,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:04,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:21:04,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:21:04,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:21:04,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 180 transitions, 1530 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:04,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:04,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:21:04,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:05,804 INFO L124 PetriNetUnfolderBase]: 6160/9663 cut-off events. [2024-06-27 18:21:05,804 INFO L125 PetriNetUnfolderBase]: For 223665/223738 co-relation queries the response was YES. [2024-06-27 18:21:05,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52292 conditions, 9663 events. 6160/9663 cut-off events. For 223665/223738 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 61389 event pairs, 2149 based on Foata normal form. 18/9466 useless extension candidates. Maximal degree in co-relation 52227. Up to 8472 conditions per place. [2024-06-27 18:21:05,889 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 172 selfloop transitions, 35 changer transitions 0/228 dead transitions. [2024-06-27 18:21:05,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 228 transitions, 2196 flow [2024-06-27 18:21:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:21:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:21:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 18:21:05,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-06-27 18:21:05,890 INFO L175 Difference]: Start difference. First operand has 149 places, 180 transitions, 1530 flow. Second operand 8 states and 198 transitions. [2024-06-27 18:21:05,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 228 transitions, 2196 flow [2024-06-27 18:21:06,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 228 transitions, 2106 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 18:21:06,083 INFO L231 Difference]: Finished difference. Result has 152 places, 185 transitions, 1669 flow [2024-06-27 18:21:06,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1669, PETRI_PLACES=152, PETRI_TRANSITIONS=185} [2024-06-27 18:21:06,083 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-27 18:21:06,084 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 185 transitions, 1669 flow [2024-06-27 18:21:06,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:06,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:06,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:06,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:21:06,084 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:06,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:06,085 INFO L85 PathProgramCache]: Analyzing trace with hash -865680793, now seen corresponding path program 5 times [2024-06-27 18:21:06,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:06,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119493844] [2024-06-27 18:21:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:07,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119493844] [2024-06-27 18:21:07,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119493844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:07,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:07,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:21:07,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447644276] [2024-06-27 18:21:07,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:07,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:21:07,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:21:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:21:07,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:21:07,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 185 transitions, 1669 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:07,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:07,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:21:07,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:08,968 INFO L124 PetriNetUnfolderBase]: 6154/9633 cut-off events. [2024-06-27 18:21:08,968 INFO L125 PetriNetUnfolderBase]: For 239592/239645 co-relation queries the response was YES. [2024-06-27 18:21:09,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53348 conditions, 9633 events. 6154/9633 cut-off events. For 239592/239645 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 60962 event pairs, 2128 based on Foata normal form. 18/9448 useless extension candidates. Maximal degree in co-relation 53281. Up to 8500 conditions per place. [2024-06-27 18:21:09,044 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 187 selfloop transitions, 24 changer transitions 0/232 dead transitions. [2024-06-27 18:21:09,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 232 transitions, 2306 flow [2024-06-27 18:21:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:21:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:21:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 18:21:09,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-06-27 18:21:09,045 INFO L175 Difference]: Start difference. First operand has 152 places, 185 transitions, 1669 flow. Second operand 8 states and 198 transitions. [2024-06-27 18:21:09,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 232 transitions, 2306 flow [2024-06-27 18:21:09,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 232 transitions, 2187 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 18:21:09,212 INFO L231 Difference]: Finished difference. Result has 157 places, 190 transitions, 1704 flow [2024-06-27 18:21:09,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1704, PETRI_PLACES=157, PETRI_TRANSITIONS=190} [2024-06-27 18:21:09,213 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 102 predicate places. [2024-06-27 18:21:09,213 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 190 transitions, 1704 flow [2024-06-27 18:21:09,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:09,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:09,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:09,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:21:09,214 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:09,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:09,214 INFO L85 PathProgramCache]: Analyzing trace with hash 646729967, now seen corresponding path program 2 times [2024-06-27 18:21:09,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:09,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739096565] [2024-06-27 18:21:09,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:09,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:09,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:09,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739096565] [2024-06-27 18:21:09,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739096565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:09,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:09,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:21:09,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643097442] [2024-06-27 18:21:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:09,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:21:09,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:21:09,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:21:09,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:21:09,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 190 transitions, 1704 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:09,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:09,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:21:09,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:11,273 INFO L124 PetriNetUnfolderBase]: 6248/9711 cut-off events. [2024-06-27 18:21:11,273 INFO L125 PetriNetUnfolderBase]: For 250965/251034 co-relation queries the response was YES. [2024-06-27 18:21:11,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54616 conditions, 9711 events. 6248/9711 cut-off events. For 250965/251034 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 60817 event pairs, 2349 based on Foata normal form. 24/9493 useless extension candidates. Maximal degree in co-relation 54546. Up to 8841 conditions per place. [2024-06-27 18:21:11,351 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 171 selfloop transitions, 13 changer transitions 0/207 dead transitions. [2024-06-27 18:21:11,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 207 transitions, 2120 flow [2024-06-27 18:21:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:21:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:21:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 18:21:11,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-27 18:21:11,352 INFO L175 Difference]: Start difference. First operand has 157 places, 190 transitions, 1704 flow. Second operand 6 states and 139 transitions. [2024-06-27 18:21:11,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 207 transitions, 2120 flow [2024-06-27 18:21:11,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 207 transitions, 1993 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 18:21:11,546 INFO L231 Difference]: Finished difference. Result has 158 places, 190 transitions, 1609 flow [2024-06-27 18:21:11,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1609, PETRI_PLACES=158, PETRI_TRANSITIONS=190} [2024-06-27 18:21:11,547 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 103 predicate places. [2024-06-27 18:21:11,547 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 190 transitions, 1609 flow [2024-06-27 18:21:11,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:11,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:11,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:21:11,548 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:11,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:11,548 INFO L85 PathProgramCache]: Analyzing trace with hash 197734864, now seen corresponding path program 1 times [2024-06-27 18:21:11,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:11,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113295405] [2024-06-27 18:21:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:11,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:12,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:12,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113295405] [2024-06-27 18:21:12,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113295405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:12,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:12,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:21:12,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182356557] [2024-06-27 18:21:12,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:12,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:21:12,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:21:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:21:12,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:21:12,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 190 transitions, 1609 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:12,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:12,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:21:12,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:13,778 INFO L124 PetriNetUnfolderBase]: 6696/10311 cut-off events. [2024-06-27 18:21:13,779 INFO L125 PetriNetUnfolderBase]: For 259059/259093 co-relation queries the response was YES. [2024-06-27 18:21:13,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56624 conditions, 10311 events. 6696/10311 cut-off events. For 259059/259093 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 64046 event pairs, 2440 based on Foata normal form. 21/10136 useless extension candidates. Maximal degree in co-relation 56553. Up to 9433 conditions per place. [2024-06-27 18:21:13,880 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 180 selfloop transitions, 24 changer transitions 0/220 dead transitions. [2024-06-27 18:21:13,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 220 transitions, 2209 flow [2024-06-27 18:21:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:21:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:21:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 18:21:13,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 18:21:13,882 INFO L175 Difference]: Start difference. First operand has 158 places, 190 transitions, 1609 flow. Second operand 6 states and 142 transitions. [2024-06-27 18:21:13,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 220 transitions, 2209 flow [2024-06-27 18:21:14,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 220 transitions, 2162 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 18:21:14,009 INFO L231 Difference]: Finished difference. Result has 159 places, 196 transitions, 1675 flow [2024-06-27 18:21:14,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1675, PETRI_PLACES=159, PETRI_TRANSITIONS=196} [2024-06-27 18:21:14,009 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-27 18:21:14,009 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 196 transitions, 1675 flow [2024-06-27 18:21:14,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:14,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:14,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:14,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:21:14,010 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:14,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:14,010 INFO L85 PathProgramCache]: Analyzing trace with hash 676083060, now seen corresponding path program 2 times [2024-06-27 18:21:14,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:14,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864221429] [2024-06-27 18:21:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:14,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:14,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864221429] [2024-06-27 18:21:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864221429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:14,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:14,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:21:14,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852649769] [2024-06-27 18:21:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:14,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:21:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:21:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:21:14,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:21:14,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 196 transitions, 1675 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:14,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:14,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:21:14,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:16,244 INFO L124 PetriNetUnfolderBase]: 6691/10294 cut-off events. [2024-06-27 18:21:16,244 INFO L125 PetriNetUnfolderBase]: For 271611/271645 co-relation queries the response was YES. [2024-06-27 18:21:16,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57850 conditions, 10294 events. 6691/10294 cut-off events. For 271611/271645 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 63772 event pairs, 2439 based on Foata normal form. 19/10133 useless extension candidates. Maximal degree in co-relation 57779. Up to 9427 conditions per place. [2024-06-27 18:21:16,331 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 176 selfloop transitions, 24 changer transitions 0/216 dead transitions. [2024-06-27 18:21:16,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 216 transitions, 2139 flow [2024-06-27 18:21:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:21:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:21:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 18:21:16,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 18:21:16,332 INFO L175 Difference]: Start difference. First operand has 159 places, 196 transitions, 1675 flow. Second operand 6 states and 138 transitions. [2024-06-27 18:21:16,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 216 transitions, 2139 flow [2024-06-27 18:21:16,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 216 transitions, 2088 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 18:21:16,498 INFO L231 Difference]: Finished difference. Result has 163 places, 196 transitions, 1679 flow [2024-06-27 18:21:16,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1679, PETRI_PLACES=163, PETRI_TRANSITIONS=196} [2024-06-27 18:21:16,499 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-27 18:21:16,499 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 196 transitions, 1679 flow [2024-06-27 18:21:16,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:16,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:16,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:16,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:21:16,499 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:16,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash -322613209, now seen corresponding path program 1 times [2024-06-27 18:21:16,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:16,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255242412] [2024-06-27 18:21:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:16,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:17,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:17,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255242412] [2024-06-27 18:21:17,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255242412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:17,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:17,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:21:17,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202240877] [2024-06-27 18:21:17,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:17,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:21:17,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:17,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:21:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:21:18,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:21:18,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 196 transitions, 1679 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:18,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:18,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:21:18,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:19,995 INFO L124 PetriNetUnfolderBase]: 6296/9558 cut-off events. [2024-06-27 18:21:19,995 INFO L125 PetriNetUnfolderBase]: For 277719/277735 co-relation queries the response was YES. [2024-06-27 18:21:20,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55622 conditions, 9558 events. 6296/9558 cut-off events. For 277719/277735 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 58502 event pairs, 1515 based on Foata normal form. 4/9433 useless extension candidates. Maximal degree in co-relation 55549. Up to 8548 conditions per place. [2024-06-27 18:21:20,103 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 222 selfloop transitions, 47 changer transitions 0/291 dead transitions. [2024-06-27 18:21:20,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 291 transitions, 2825 flow [2024-06-27 18:21:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:21:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:21:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 289 transitions. [2024-06-27 18:21:20,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536178107606679 [2024-06-27 18:21:20,105 INFO L175 Difference]: Start difference. First operand has 163 places, 196 transitions, 1679 flow. Second operand 11 states and 289 transitions. [2024-06-27 18:21:20,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 291 transitions, 2825 flow [2024-06-27 18:21:20,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 291 transitions, 2757 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:21:20,338 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 1933 flow [2024-06-27 18:21:20,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1933, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2024-06-27 18:21:20,339 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2024-06-27 18:21:20,339 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 1933 flow [2024-06-27 18:21:20,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:20,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:20,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:20,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:21:20,340 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:20,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash -322522999, now seen corresponding path program 2 times [2024-06-27 18:21:20,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:20,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635436689] [2024-06-27 18:21:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:20,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:21,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:21,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635436689] [2024-06-27 18:21:21,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635436689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:21,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:21,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:21:21,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107421735] [2024-06-27 18:21:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:21,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:21:21,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:21:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:21:22,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:21:22,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 1933 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:22,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:22,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:21:22,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:23,733 INFO L124 PetriNetUnfolderBase]: 6289/9547 cut-off events. [2024-06-27 18:21:23,734 INFO L125 PetriNetUnfolderBase]: For 293761/293777 co-relation queries the response was YES. [2024-06-27 18:21:23,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57095 conditions, 9547 events. 6289/9547 cut-off events. For 293761/293777 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 58395 event pairs, 1533 based on Foata normal form. 4/9420 useless extension candidates. Maximal degree in co-relation 57021. Up to 8596 conditions per place. [2024-06-27 18:21:23,824 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 214 selfloop transitions, 41 changer transitions 0/277 dead transitions. [2024-06-27 18:21:23,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 277 transitions, 2675 flow [2024-06-27 18:21:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:21:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:21:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 18:21:23,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265306122448979 [2024-06-27 18:21:23,825 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 1933 flow. Second operand 10 states and 258 transitions. [2024-06-27 18:21:23,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 277 transitions, 2675 flow [2024-06-27 18:21:24,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 277 transitions, 2464 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-27 18:21:24,123 INFO L231 Difference]: Finished difference. Result has 173 places, 205 transitions, 1813 flow [2024-06-27 18:21:24,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1813, PETRI_PLACES=173, PETRI_TRANSITIONS=205} [2024-06-27 18:21:24,124 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-06-27 18:21:24,124 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 205 transitions, 1813 flow [2024-06-27 18:21:24,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:24,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:24,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:24,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:21:24,124 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:24,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:24,125 INFO L85 PathProgramCache]: Analyzing trace with hash -318803929, now seen corresponding path program 3 times [2024-06-27 18:21:24,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:24,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715095379] [2024-06-27 18:21:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:25,552 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 18:21:25,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:25,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715095379] [2024-06-27 18:21:25,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715095379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:25,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:25,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:21:25,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126228527] [2024-06-27 18:21:25,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:25,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:21:25,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:25,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:21:25,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:21:25,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:21:25,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 205 transitions, 1813 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:25,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:25,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:21:25,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:27,239 INFO L124 PetriNetUnfolderBase]: 6295/9489 cut-off events. [2024-06-27 18:21:27,239 INFO L125 PetriNetUnfolderBase]: For 304260/304276 co-relation queries the response was YES. [2024-06-27 18:21:27,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57235 conditions, 9489 events. 6295/9489 cut-off events. For 304260/304276 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 57561 event pairs, 1211 based on Foata normal form. 4/9388 useless extension candidates. Maximal degree in co-relation 57159. Up to 7747 conditions per place. [2024-06-27 18:21:27,326 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 163 selfloop transitions, 115 changer transitions 0/300 dead transitions. [2024-06-27 18:21:27,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 300 transitions, 3223 flow [2024-06-27 18:21:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:21:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:21:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-06-27 18:21:27,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5469387755102041 [2024-06-27 18:21:27,328 INFO L175 Difference]: Start difference. First operand has 173 places, 205 transitions, 1813 flow. Second operand 10 states and 268 transitions. [2024-06-27 18:21:27,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 300 transitions, 3223 flow [2024-06-27 18:21:27,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 300 transitions, 3132 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 18:21:27,585 INFO L231 Difference]: Finished difference. Result has 177 places, 223 transitions, 2520 flow [2024-06-27 18:21:27,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2520, PETRI_PLACES=177, PETRI_TRANSITIONS=223} [2024-06-27 18:21:27,585 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 122 predicate places. [2024-06-27 18:21:27,585 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 223 transitions, 2520 flow [2024-06-27 18:21:27,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:27,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:27,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:27,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:21:27,586 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:27,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:27,587 INFO L85 PathProgramCache]: Analyzing trace with hash -174913399, now seen corresponding path program 4 times [2024-06-27 18:21:27,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:27,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368110388] [2024-06-27 18:21:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:27,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:28,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:28,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368110388] [2024-06-27 18:21:28,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368110388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:28,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:28,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:21:28,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62564828] [2024-06-27 18:21:28,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:28,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:21:28,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:21:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:21:29,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:21:29,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 223 transitions, 2520 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:29,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:29,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:21:29,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:30,850 INFO L124 PetriNetUnfolderBase]: 6366/9592 cut-off events. [2024-06-27 18:21:30,850 INFO L125 PetriNetUnfolderBase]: For 334448/334464 co-relation queries the response was YES. [2024-06-27 18:21:30,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61529 conditions, 9592 events. 6366/9592 cut-off events. For 334448/334464 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 58203 event pairs, 1240 based on Foata normal form. 4/9491 useless extension candidates. Maximal degree in co-relation 61449. Up to 7827 conditions per place. [2024-06-27 18:21:30,937 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 169 selfloop transitions, 118 changer transitions 0/309 dead transitions. [2024-06-27 18:21:30,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 309 transitions, 3807 flow [2024-06-27 18:21:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:21:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:21:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 266 transitions. [2024-06-27 18:21:30,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-27 18:21:30,939 INFO L175 Difference]: Start difference. First operand has 177 places, 223 transitions, 2520 flow. Second operand 10 states and 266 transitions. [2024-06-27 18:21:30,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 309 transitions, 3807 flow [2024-06-27 18:21:31,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 309 transitions, 3424 flow, removed 178 selfloop flow, removed 3 redundant places. [2024-06-27 18:21:31,408 INFO L231 Difference]: Finished difference. Result has 186 places, 235 transitions, 2753 flow [2024-06-27 18:21:31,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2753, PETRI_PLACES=186, PETRI_TRANSITIONS=235} [2024-06-27 18:21:31,408 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-27 18:21:31,408 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 235 transitions, 2753 flow [2024-06-27 18:21:31,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:31,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:31,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:31,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:21:31,409 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:31,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:31,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1718135878, now seen corresponding path program 1 times [2024-06-27 18:21:31,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:31,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078635772] [2024-06-27 18:21:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:31,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:32,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:32,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078635772] [2024-06-27 18:21:32,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078635772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:32,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:32,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:21:32,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395093339] [2024-06-27 18:21:32,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:21:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:21:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:21:32,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:21:32,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 235 transitions, 2753 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:32,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:32,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:21:32,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:34,705 INFO L124 PetriNetUnfolderBase]: 6941/10651 cut-off events. [2024-06-27 18:21:34,705 INFO L125 PetriNetUnfolderBase]: For 354025/354051 co-relation queries the response was YES. [2024-06-27 18:21:34,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66541 conditions, 10651 events. 6941/10651 cut-off events. For 354025/354051 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 65713 event pairs, 1798 based on Foata normal form. 4/10454 useless extension candidates. Maximal degree in co-relation 66458. Up to 9293 conditions per place. [2024-06-27 18:21:34,808 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 238 selfloop transitions, 47 changer transitions 0/300 dead transitions. [2024-06-27 18:21:34,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 300 transitions, 3615 flow [2024-06-27 18:21:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:21:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:21:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:21:34,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124716553287982 [2024-06-27 18:21:34,809 INFO L175 Difference]: Start difference. First operand has 186 places, 235 transitions, 2753 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:21:34,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 300 transitions, 3615 flow [2024-06-27 18:21:35,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 300 transitions, 3296 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-27 18:21:35,182 INFO L231 Difference]: Finished difference. Result has 192 places, 240 transitions, 2637 flow [2024-06-27 18:21:35,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2637, PETRI_PLACES=192, PETRI_TRANSITIONS=240} [2024-06-27 18:21:35,183 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 137 predicate places. [2024-06-27 18:21:35,183 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 240 transitions, 2637 flow [2024-06-27 18:21:35,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:35,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:35,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:35,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:21:35,184 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:35,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1569405452, now seen corresponding path program 1 times [2024-06-27 18:21:35,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:35,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987269588] [2024-06-27 18:21:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:35,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:36,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:36,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987269588] [2024-06-27 18:21:36,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987269588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:36,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:36,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:21:36,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864461427] [2024-06-27 18:21:36,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:36,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:21:36,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:36,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:21:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:21:36,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:21:36,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 240 transitions, 2637 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:36,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:36,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:21:36,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:37,653 INFO L124 PetriNetUnfolderBase]: 7043/10778 cut-off events. [2024-06-27 18:21:37,653 INFO L125 PetriNetUnfolderBase]: For 361834/361840 co-relation queries the response was YES. [2024-06-27 18:21:37,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66809 conditions, 10778 events. 7043/10778 cut-off events. For 361834/361840 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 66548 event pairs, 2096 based on Foata normal form. 3/10571 useless extension candidates. Maximal degree in co-relation 66724. Up to 9889 conditions per place. [2024-06-27 18:21:37,778 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 240 selfloop transitions, 26 changer transitions 0/283 dead transitions. [2024-06-27 18:21:37,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 283 transitions, 3445 flow [2024-06-27 18:21:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:21:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:21:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:21:37,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2024-06-27 18:21:37,779 INFO L175 Difference]: Start difference. First operand has 192 places, 240 transitions, 2637 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:21:37,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 283 transitions, 3445 flow [2024-06-27 18:21:38,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 283 transitions, 3298 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 18:21:38,404 INFO L231 Difference]: Finished difference. Result has 193 places, 246 transitions, 2634 flow [2024-06-27 18:21:38,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2634, PETRI_PLACES=193, PETRI_TRANSITIONS=246} [2024-06-27 18:21:38,405 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 138 predicate places. [2024-06-27 18:21:38,405 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 246 transitions, 2634 flow [2024-06-27 18:21:38,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:38,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:38,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:38,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:21:38,406 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:38,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:38,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1517202814, now seen corresponding path program 2 times [2024-06-27 18:21:38,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:38,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239942023] [2024-06-27 18:21:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:38,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:39,842 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 18:21:39,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:39,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239942023] [2024-06-27 18:21:39,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239942023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:39,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:39,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:21:39,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052131903] [2024-06-27 18:21:39,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:39,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:21:39,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:39,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:21:39,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:21:39,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:21:39,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 246 transitions, 2634 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:39,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:39,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:21:39,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:42,061 INFO L124 PetriNetUnfolderBase]: 7068/10825 cut-off events. [2024-06-27 18:21:42,062 INFO L125 PetriNetUnfolderBase]: For 383238/383273 co-relation queries the response was YES. [2024-06-27 18:21:42,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68361 conditions, 10825 events. 7068/10825 cut-off events. For 383238/383273 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 66731 event pairs, 1841 based on Foata normal form. 4/10632 useless extension candidates. Maximal degree in co-relation 68275. Up to 9425 conditions per place. [2024-06-27 18:21:42,179 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 244 selfloop transitions, 50 changer transitions 0/311 dead transitions. [2024-06-27 18:21:42,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 311 transitions, 3543 flow [2024-06-27 18:21:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:21:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:21:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-27 18:21:42,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-27 18:21:42,181 INFO L175 Difference]: Start difference. First operand has 193 places, 246 transitions, 2634 flow. Second operand 9 states and 224 transitions. [2024-06-27 18:21:42,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 311 transitions, 3543 flow [2024-06-27 18:21:42,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 311 transitions, 3483 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 18:21:42,657 INFO L231 Difference]: Finished difference. Result has 200 places, 254 transitions, 2824 flow [2024-06-27 18:21:42,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2824, PETRI_PLACES=200, PETRI_TRANSITIONS=254} [2024-06-27 18:21:42,658 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 145 predicate places. [2024-06-27 18:21:42,658 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 254 transitions, 2824 flow [2024-06-27 18:21:42,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:42,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:42,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:42,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:21:42,659 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:42,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1517193514, now seen corresponding path program 3 times [2024-06-27 18:21:42,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:42,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141441571] [2024-06-27 18:21:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:42,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:44,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:44,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141441571] [2024-06-27 18:21:44,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141441571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:44,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:44,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:21:44,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72806684] [2024-06-27 18:21:44,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:44,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:21:44,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:44,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:21:44,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:21:44,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:21:44,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 254 transitions, 2824 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:44,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:44,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:21:44,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:46,317 INFO L124 PetriNetUnfolderBase]: 7178/11002 cut-off events. [2024-06-27 18:21:46,317 INFO L125 PetriNetUnfolderBase]: For 416814/416844 co-relation queries the response was YES. [2024-06-27 18:21:46,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71652 conditions, 11002 events. 7178/11002 cut-off events. For 416814/416844 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 68003 event pairs, 1831 based on Foata normal form. 4/10775 useless extension candidates. Maximal degree in co-relation 71563. Up to 9438 conditions per place. [2024-06-27 18:21:46,439 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 243 selfloop transitions, 57 changer transitions 0/317 dead transitions. [2024-06-27 18:21:46,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 317 transitions, 3908 flow [2024-06-27 18:21:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:21:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:21:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:21:46,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124716553287982 [2024-06-27 18:21:46,441 INFO L175 Difference]: Start difference. First operand has 200 places, 254 transitions, 2824 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:21:46,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 317 transitions, 3908 flow [2024-06-27 18:21:46,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 317 transitions, 3767 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 18:21:46,940 INFO L231 Difference]: Finished difference. Result has 205 places, 258 transitions, 2944 flow [2024-06-27 18:21:46,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2944, PETRI_PLACES=205, PETRI_TRANSITIONS=258} [2024-06-27 18:21:46,941 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 150 predicate places. [2024-06-27 18:21:46,941 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 258 transitions, 2944 flow [2024-06-27 18:21:46,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:46,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:46,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:46,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:21:46,942 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:46,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:46,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1747564530, now seen corresponding path program 4 times [2024-06-27 18:21:46,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:46,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376708769] [2024-06-27 18:21:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:46,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:48,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:48,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376708769] [2024-06-27 18:21:48,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376708769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:48,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:48,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:21:48,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585011046] [2024-06-27 18:21:48,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:48,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:21:48,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:48,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:21:48,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:21:48,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:21:48,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 258 transitions, 2944 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:48,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:48,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:21:48,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:50,493 INFO L124 PetriNetUnfolderBase]: 7142/10949 cut-off events. [2024-06-27 18:21:50,493 INFO L125 PetriNetUnfolderBase]: For 423280/423310 co-relation queries the response was YES. [2024-06-27 18:21:50,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70687 conditions, 10949 events. 7142/10949 cut-off events. For 423280/423310 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 67672 event pairs, 1808 based on Foata normal form. 4/10752 useless extension candidates. Maximal degree in co-relation 70597. Up to 9535 conditions per place. [2024-06-27 18:21:50,601 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 250 selfloop transitions, 49 changer transitions 0/316 dead transitions. [2024-06-27 18:21:50,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 316 transitions, 3738 flow [2024-06-27 18:21:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:21:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:21:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:21:50,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124716553287982 [2024-06-27 18:21:50,604 INFO L175 Difference]: Start difference. First operand has 205 places, 258 transitions, 2944 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:21:50,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 316 transitions, 3738 flow [2024-06-27 18:21:51,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 316 transitions, 3568 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-27 18:21:51,206 INFO L231 Difference]: Finished difference. Result has 209 places, 258 transitions, 2879 flow [2024-06-27 18:21:51,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2879, PETRI_PLACES=209, PETRI_TRANSITIONS=258} [2024-06-27 18:21:51,207 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2024-06-27 18:21:51,207 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 258 transitions, 2879 flow [2024-06-27 18:21:51,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:51,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:51,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:51,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:21:51,208 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:51,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash 877305895, now seen corresponding path program 5 times [2024-06-27 18:21:51,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:51,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116592187] [2024-06-27 18:21:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:51,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:52,648 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 18:21:52,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116592187] [2024-06-27 18:21:52,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116592187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:52,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:52,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:21:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74387989] [2024-06-27 18:21:52,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:21:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:21:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:21:52,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:21:52,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 258 transitions, 2879 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:52,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:52,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:21:52,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:54,517 INFO L124 PetriNetUnfolderBase]: 6767/10225 cut-off events. [2024-06-27 18:21:54,517 INFO L125 PetriNetUnfolderBase]: For 419800/419816 co-relation queries the response was YES. [2024-06-27 18:21:54,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67902 conditions, 10225 events. 6767/10225 cut-off events. For 419800/419816 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 62305 event pairs, 1295 based on Foata normal form. 4/10116 useless extension candidates. Maximal degree in co-relation 67810. Up to 8239 conditions per place. [2024-06-27 18:21:54,646 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 190 selfloop transitions, 128 changer transitions 0/344 dead transitions. [2024-06-27 18:21:54,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 344 transitions, 4258 flow [2024-06-27 18:21:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:21:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:21:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 18:21:54,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387755102040817 [2024-06-27 18:21:54,647 INFO L175 Difference]: Start difference. First operand has 209 places, 258 transitions, 2879 flow. Second operand 10 states and 264 transitions. [2024-06-27 18:21:54,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 344 transitions, 4258 flow [2024-06-27 18:21:55,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 344 transitions, 4119 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 18:21:55,396 INFO L231 Difference]: Finished difference. Result has 212 places, 273 transitions, 3427 flow [2024-06-27 18:21:55,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3427, PETRI_PLACES=212, PETRI_TRANSITIONS=273} [2024-06-27 18:21:55,397 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 157 predicate places. [2024-06-27 18:21:55,397 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 273 transitions, 3427 flow [2024-06-27 18:21:55,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:55,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:55,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:55,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:21:55,397 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:55,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1569763936, now seen corresponding path program 1 times [2024-06-27 18:21:55,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:55,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413395363] [2024-06-27 18:21:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:55,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:56,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:56,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413395363] [2024-06-27 18:21:56,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413395363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:56,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:56,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:21:56,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853812464] [2024-06-27 18:21:56,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:56,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:21:56,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:56,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:21:56,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:21:56,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:21:56,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 273 transitions, 3427 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:56,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:56,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:21:56,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:21:57,946 INFO L124 PetriNetUnfolderBase]: 7085/10931 cut-off events. [2024-06-27 18:21:57,947 INFO L125 PetriNetUnfolderBase]: For 463221/463270 co-relation queries the response was YES. [2024-06-27 18:21:58,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72786 conditions, 10931 events. 7085/10931 cut-off events. For 463221/463270 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68701 event pairs, 2114 based on Foata normal form. 24/10716 useless extension candidates. Maximal degree in co-relation 72692. Up to 9769 conditions per place. [2024-06-27 18:21:58,080 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 254 selfloop transitions, 26 changer transitions 0/318 dead transitions. [2024-06-27 18:21:58,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 318 transitions, 4303 flow [2024-06-27 18:21:58,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:21:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:21:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:21:58,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131195335276968 [2024-06-27 18:21:58,081 INFO L175 Difference]: Start difference. First operand has 212 places, 273 transitions, 3427 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:21:58,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 318 transitions, 4303 flow [2024-06-27 18:21:58,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 318 transitions, 3963 flow, removed 110 selfloop flow, removed 3 redundant places. [2024-06-27 18:21:58,706 INFO L231 Difference]: Finished difference. Result has 217 places, 283 transitions, 3288 flow [2024-06-27 18:21:58,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3288, PETRI_PLACES=217, PETRI_TRANSITIONS=283} [2024-06-27 18:21:58,707 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 162 predicate places. [2024-06-27 18:21:58,707 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 283 transitions, 3288 flow [2024-06-27 18:21:58,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:58,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:21:58,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:21:58,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:21:58,707 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:21:58,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:21:58,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1569763502, now seen corresponding path program 2 times [2024-06-27 18:21:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:21:58,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447901155] [2024-06-27 18:21:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:21:58,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:21:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:21:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:21:59,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:21:59,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447901155] [2024-06-27 18:21:59,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447901155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:21:59,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:21:59,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:21:59,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939736004] [2024-06-27 18:21:59,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:21:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:21:59,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:21:59,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:21:59,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:21:59,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:21:59,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 283 transitions, 3288 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:21:59,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:21:59,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:21:59,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:01,348 INFO L124 PetriNetUnfolderBase]: 7435/11376 cut-off events. [2024-06-27 18:22:01,348 INFO L125 PetriNetUnfolderBase]: For 477995/478003 co-relation queries the response was YES. [2024-06-27 18:22:01,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75954 conditions, 11376 events. 7435/11376 cut-off events. For 477995/478003 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 70677 event pairs, 2160 based on Foata normal form. 5/11141 useless extension candidates. Maximal degree in co-relation 75858. Up to 10433 conditions per place. [2024-06-27 18:22:01,486 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 271 selfloop transitions, 28 changer transitions 0/317 dead transitions. [2024-06-27 18:22:01,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 317 transitions, 4124 flow [2024-06-27 18:22:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:22:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:22:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 18:22:01,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839650145772595 [2024-06-27 18:22:01,488 INFO L175 Difference]: Start difference. First operand has 217 places, 283 transitions, 3288 flow. Second operand 7 states and 166 transitions. [2024-06-27 18:22:01,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 317 transitions, 4124 flow [2024-06-27 18:22:02,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 317 transitions, 4070 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 18:22:02,250 INFO L231 Difference]: Finished difference. Result has 222 places, 286 transitions, 3336 flow [2024-06-27 18:22:02,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3336, PETRI_PLACES=222, PETRI_TRANSITIONS=286} [2024-06-27 18:22:02,250 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 167 predicate places. [2024-06-27 18:22:02,251 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 286 transitions, 3336 flow [2024-06-27 18:22:02,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:02,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:02,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:02,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:22:02,251 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:02,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:02,251 INFO L85 PathProgramCache]: Analyzing trace with hash 49673962, now seen corresponding path program 5 times [2024-06-27 18:22:02,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:02,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928020704] [2024-06-27 18:22:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:02,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:03,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:03,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928020704] [2024-06-27 18:22:03,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928020704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:03,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:03,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:22:03,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374696759] [2024-06-27 18:22:03,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:03,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:22:03,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:03,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:22:03,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:22:03,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:03,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 286 transitions, 3336 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:03,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:03,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:03,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:05,655 INFO L124 PetriNetUnfolderBase]: 7505/11560 cut-off events. [2024-06-27 18:22:05,655 INFO L125 PetriNetUnfolderBase]: For 507221/507261 co-relation queries the response was YES. [2024-06-27 18:22:05,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78154 conditions, 11560 events. 7505/11560 cut-off events. For 507221/507261 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 72515 event pairs, 2346 based on Foata normal form. 4/11350 useless extension candidates. Maximal degree in co-relation 78055. Up to 10209 conditions per place. [2024-06-27 18:22:05,787 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 289 selfloop transitions, 35 changer transitions 0/342 dead transitions. [2024-06-27 18:22:05,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 342 transitions, 4464 flow [2024-06-27 18:22:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:22:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:22:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 18:22:05,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875283446712018 [2024-06-27 18:22:05,788 INFO L175 Difference]: Start difference. First operand has 222 places, 286 transitions, 3336 flow. Second operand 9 states and 215 transitions. [2024-06-27 18:22:05,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 342 transitions, 4464 flow [2024-06-27 18:22:06,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 342 transitions, 4396 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 18:22:06,336 INFO L231 Difference]: Finished difference. Result has 228 places, 292 transitions, 3522 flow [2024-06-27 18:22:06,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3522, PETRI_PLACES=228, PETRI_TRANSITIONS=292} [2024-06-27 18:22:06,337 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 173 predicate places. [2024-06-27 18:22:06,337 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 292 transitions, 3522 flow [2024-06-27 18:22:06,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:06,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:06,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:06,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:22:06,338 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:06,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:06,338 INFO L85 PathProgramCache]: Analyzing trace with hash 382132222, now seen corresponding path program 6 times [2024-06-27 18:22:06,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:06,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291151020] [2024-06-27 18:22:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:06,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:07,467 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 18:22:07,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:07,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291151020] [2024-06-27 18:22:07,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291151020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:07,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:07,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:22:07,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195813135] [2024-06-27 18:22:07,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:07,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:22:07,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:07,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:22:07,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:22:07,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:07,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 292 transitions, 3522 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:07,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:07,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:07,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:09,880 INFO L124 PetriNetUnfolderBase]: 7497/11573 cut-off events. [2024-06-27 18:22:09,880 INFO L125 PetriNetUnfolderBase]: For 526638/526678 co-relation queries the response was YES. [2024-06-27 18:22:09,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78868 conditions, 11573 events. 7497/11573 cut-off events. For 526638/526678 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 72883 event pairs, 2357 based on Foata normal form. 4/11356 useless extension candidates. Maximal degree in co-relation 78767. Up to 10332 conditions per place. [2024-06-27 18:22:09,996 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 291 selfloop transitions, 31 changer transitions 0/340 dead transitions. [2024-06-27 18:22:09,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 340 transitions, 4316 flow [2024-06-27 18:22:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:22:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:22:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-27 18:22:09,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48072562358276644 [2024-06-27 18:22:09,998 INFO L175 Difference]: Start difference. First operand has 228 places, 292 transitions, 3522 flow. Second operand 9 states and 212 transitions. [2024-06-27 18:22:09,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 340 transitions, 4316 flow [2024-06-27 18:22:10,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 340 transitions, 4152 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-27 18:22:10,688 INFO L231 Difference]: Finished difference. Result has 232 places, 292 transitions, 3428 flow [2024-06-27 18:22:10,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3428, PETRI_PLACES=232, PETRI_TRANSITIONS=292} [2024-06-27 18:22:10,688 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 177 predicate places. [2024-06-27 18:22:10,688 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 292 transitions, 3428 flow [2024-06-27 18:22:10,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:10,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:10,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:10,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:22:10,689 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:10,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1066308546, now seen corresponding path program 7 times [2024-06-27 18:22:10,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:10,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020236260] [2024-06-27 18:22:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:10,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:11,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:11,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020236260] [2024-06-27 18:22:11,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020236260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:11,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:11,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:22:11,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566774908] [2024-06-27 18:22:11,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:11,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:22:11,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:11,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:22:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:22:12,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:12,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 292 transitions, 3428 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:12,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:12,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:12,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:14,042 INFO L124 PetriNetUnfolderBase]: 7580/11687 cut-off events. [2024-06-27 18:22:14,043 INFO L125 PetriNetUnfolderBase]: For 539032/539072 co-relation queries the response was YES. [2024-06-27 18:22:14,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79596 conditions, 11687 events. 7580/11687 cut-off events. For 539032/539072 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 73506 event pairs, 2357 based on Foata normal form. 4/11472 useless extension candidates. Maximal degree in co-relation 79493. Up to 10362 conditions per place. [2024-06-27 18:22:14,198 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 299 selfloop transitions, 34 changer transitions 0/351 dead transitions. [2024-06-27 18:22:14,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 351 transitions, 4421 flow [2024-06-27 18:22:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:22:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:22:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-27 18:22:14,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-27 18:22:14,200 INFO L175 Difference]: Start difference. First operand has 232 places, 292 transitions, 3428 flow. Second operand 9 states and 217 transitions. [2024-06-27 18:22:14,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 351 transitions, 4421 flow [2024-06-27 18:22:14,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 351 transitions, 4359 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 18:22:14,864 INFO L231 Difference]: Finished difference. Result has 235 places, 300 transitions, 3616 flow [2024-06-27 18:22:14,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3616, PETRI_PLACES=235, PETRI_TRANSITIONS=300} [2024-06-27 18:22:14,864 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 180 predicate places. [2024-06-27 18:22:14,864 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 300 transitions, 3616 flow [2024-06-27 18:22:14,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:14,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:14,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:14,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:22:14,865 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:14,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1066299246, now seen corresponding path program 8 times [2024-06-27 18:22:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:14,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69008514] [2024-06-27 18:22:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:14,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:16,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:16,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69008514] [2024-06-27 18:22:16,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69008514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:16,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:16,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:22:16,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716449157] [2024-06-27 18:22:16,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:16,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:22:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:16,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:22:16,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:22:16,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:16,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 300 transitions, 3616 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:16,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:16,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:16,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:18,537 INFO L124 PetriNetUnfolderBase]: 7662/11815 cut-off events. [2024-06-27 18:22:18,537 INFO L125 PetriNetUnfolderBase]: For 577344/577384 co-relation queries the response was YES. [2024-06-27 18:22:18,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82666 conditions, 11815 events. 7662/11815 cut-off events. For 577344/577384 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 74405 event pairs, 2361 based on Foata normal form. 4/11597 useless extension candidates. Maximal degree in co-relation 82561. Up to 10367 conditions per place. [2024-06-27 18:22:18,679 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 300 selfloop transitions, 39 changer transitions 0/357 dead transitions. [2024-06-27 18:22:18,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 357 transitions, 4808 flow [2024-06-27 18:22:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:22:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:22:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-27 18:22:18,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-27 18:22:18,681 INFO L175 Difference]: Start difference. First operand has 235 places, 300 transitions, 3616 flow. Second operand 9 states and 219 transitions. [2024-06-27 18:22:18,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 357 transitions, 4808 flow [2024-06-27 18:22:19,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 357 transitions, 4677 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 18:22:19,508 INFO L231 Difference]: Finished difference. Result has 240 places, 304 transitions, 3734 flow [2024-06-27 18:22:19,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3734, PETRI_PLACES=240, PETRI_TRANSITIONS=304} [2024-06-27 18:22:19,509 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 185 predicate places. [2024-06-27 18:22:19,509 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 304 transitions, 3734 flow [2024-06-27 18:22:19,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:19,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:19,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:19,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:22:19,510 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:19,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:19,510 INFO L85 PathProgramCache]: Analyzing trace with hash 394077142, now seen corresponding path program 9 times [2024-06-27 18:22:19,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:19,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205672134] [2024-06-27 18:22:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:19,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:20,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:20,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205672134] [2024-06-27 18:22:20,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205672134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:20,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:20,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:22:20,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63454829] [2024-06-27 18:22:20,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:20,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:22:20,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:20,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:22:20,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:22:20,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:20,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 304 transitions, 3734 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:20,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:20,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:20,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:23,120 INFO L124 PetriNetUnfolderBase]: 7662/11845 cut-off events. [2024-06-27 18:22:23,120 INFO L125 PetriNetUnfolderBase]: For 592534/592574 co-relation queries the response was YES. [2024-06-27 18:22:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82392 conditions, 11845 events. 7662/11845 cut-off events. For 592534/592574 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 74938 event pairs, 2347 based on Foata normal form. 4/11621 useless extension candidates. Maximal degree in co-relation 82286. Up to 10615 conditions per place. [2024-06-27 18:22:23,242 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 310 selfloop transitions, 24 changer transitions 0/352 dead transitions. [2024-06-27 18:22:23,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 352 transitions, 4616 flow [2024-06-27 18:22:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:22:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:22:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 18:22:23,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47392290249433106 [2024-06-27 18:22:23,244 INFO L175 Difference]: Start difference. First operand has 240 places, 304 transitions, 3734 flow. Second operand 9 states and 209 transitions. [2024-06-27 18:22:23,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 352 transitions, 4616 flow [2024-06-27 18:22:23,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 352 transitions, 4475 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 18:22:23,905 INFO L231 Difference]: Finished difference. Result has 244 places, 306 transitions, 3736 flow [2024-06-27 18:22:23,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3736, PETRI_PLACES=244, PETRI_TRANSITIONS=306} [2024-06-27 18:22:23,906 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 189 predicate places. [2024-06-27 18:22:23,906 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 306 transitions, 3736 flow [2024-06-27 18:22:23,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:23,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:23,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:23,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:22:23,907 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:23,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:23,907 INFO L85 PathProgramCache]: Analyzing trace with hash 382131943, now seen corresponding path program 1 times [2024-06-27 18:22:23,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:23,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182311186] [2024-06-27 18:22:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:23,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:24,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:24,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182311186] [2024-06-27 18:22:24,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182311186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:24,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:24,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:22:24,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186433041] [2024-06-27 18:22:24,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:24,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:22:24,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:22:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:22:25,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:25,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 306 transitions, 3736 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:25,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:25,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:25,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:27,508 INFO L124 PetriNetUnfolderBase]: 7708/11910 cut-off events. [2024-06-27 18:22:27,508 INFO L125 PetriNetUnfolderBase]: For 602045/602085 co-relation queries the response was YES. [2024-06-27 18:22:27,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82774 conditions, 11910 events. 7708/11910 cut-off events. For 602045/602085 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 75309 event pairs, 2374 based on Foata normal form. 2/11683 useless extension candidates. Maximal degree in co-relation 82666. Up to 10620 conditions per place. [2024-06-27 18:22:27,645 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 307 selfloop transitions, 35 changer transitions 0/360 dead transitions. [2024-06-27 18:22:27,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 360 transitions, 4676 flow [2024-06-27 18:22:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:22:27,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:22:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 18:22:27,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 18:22:27,646 INFO L175 Difference]: Start difference. First operand has 244 places, 306 transitions, 3736 flow. Second operand 9 states and 213 transitions. [2024-06-27 18:22:27,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 360 transitions, 4676 flow [2024-06-27 18:22:28,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 360 transitions, 4551 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 18:22:28,529 INFO L231 Difference]: Finished difference. Result has 246 places, 312 transitions, 3809 flow [2024-06-27 18:22:28,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3611, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3809, PETRI_PLACES=246, PETRI_TRANSITIONS=312} [2024-06-27 18:22:28,530 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 191 predicate places. [2024-06-27 18:22:28,530 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 312 transitions, 3809 flow [2024-06-27 18:22:28,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:28,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:28,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:28,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:22:28,530 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:28,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1073717856, now seen corresponding path program 10 times [2024-06-27 18:22:28,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:28,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548422392] [2024-06-27 18:22:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:28,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:29,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:29,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548422392] [2024-06-27 18:22:29,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548422392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:29,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:29,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:22:29,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348300154] [2024-06-27 18:22:29,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:29,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:22:29,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:22:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:22:30,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:30,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 312 transitions, 3809 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:30,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:30,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:30,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:32,239 INFO L124 PetriNetUnfolderBase]: 7700/11881 cut-off events. [2024-06-27 18:22:32,240 INFO L125 PetriNetUnfolderBase]: For 612638/612678 co-relation queries the response was YES. [2024-06-27 18:22:32,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82778 conditions, 11881 events. 7700/11881 cut-off events. For 612638/612678 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 75034 event pairs, 2364 based on Foata normal form. 4/11661 useless extension candidates. Maximal degree in co-relation 82669. Up to 10536 conditions per place. [2024-06-27 18:22:32,353 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 310 selfloop transitions, 35 changer transitions 0/363 dead transitions. [2024-06-27 18:22:32,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 363 transitions, 4669 flow [2024-06-27 18:22:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:22:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:22:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 18:22:32,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 18:22:32,355 INFO L175 Difference]: Start difference. First operand has 246 places, 312 transitions, 3809 flow. Second operand 9 states and 216 transitions. [2024-06-27 18:22:32,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 363 transitions, 4669 flow [2024-06-27 18:22:33,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 363 transitions, 4515 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 18:22:33,234 INFO L231 Difference]: Finished difference. Result has 248 places, 312 transitions, 3732 flow [2024-06-27 18:22:33,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3732, PETRI_PLACES=248, PETRI_TRANSITIONS=312} [2024-06-27 18:22:33,234 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 193 predicate places. [2024-06-27 18:22:33,235 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 312 transitions, 3732 flow [2024-06-27 18:22:33,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:33,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:33,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:33,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:22:33,235 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:33,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1073933337, now seen corresponding path program 6 times [2024-06-27 18:22:33,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:33,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311221133] [2024-06-27 18:22:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:33,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:34,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:34,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311221133] [2024-06-27 18:22:34,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311221133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:34,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:34,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:22:34,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507261783] [2024-06-27 18:22:34,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:34,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:22:34,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:34,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:22:34,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:22:34,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:22:34,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 312 transitions, 3732 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:34,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:34,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:22:34,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:36,832 INFO L124 PetriNetUnfolderBase]: 7201/11212 cut-off events. [2024-06-27 18:22:36,833 INFO L125 PetriNetUnfolderBase]: For 598876/598918 co-relation queries the response was YES. [2024-06-27 18:22:36,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78271 conditions, 11212 events. 7201/11212 cut-off events. For 598876/598918 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 72407 event pairs, 2069 based on Foata normal form. 6/10981 useless extension candidates. Maximal degree in co-relation 78161. Up to 9427 conditions per place. [2024-06-27 18:22:36,981 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 280 selfloop transitions, 75 changer transitions 0/383 dead transitions. [2024-06-27 18:22:36,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 383 transitions, 5036 flow [2024-06-27 18:22:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:22:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:22:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-27 18:22:36,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-27 18:22:36,983 INFO L175 Difference]: Start difference. First operand has 248 places, 312 transitions, 3732 flow. Second operand 10 states and 252 transitions. [2024-06-27 18:22:36,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 383 transitions, 5036 flow [2024-06-27 18:22:37,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 383 transitions, 4938 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 18:22:37,895 INFO L231 Difference]: Finished difference. Result has 250 places, 318 transitions, 3997 flow [2024-06-27 18:22:37,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3997, PETRI_PLACES=250, PETRI_TRANSITIONS=318} [2024-06-27 18:22:37,896 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 195 predicate places. [2024-06-27 18:22:37,896 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 318 transitions, 3997 flow [2024-06-27 18:22:37,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:37,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:37,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:37,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:22:37,897 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:37,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash -97140304, now seen corresponding path program 3 times [2024-06-27 18:22:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:37,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860738345] [2024-06-27 18:22:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:37,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:38,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860738345] [2024-06-27 18:22:38,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860738345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:38,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:38,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:22:38,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001248637] [2024-06-27 18:22:38,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:22:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:22:38,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:22:38,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:38,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 318 transitions, 3997 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:38,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:38,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:38,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:40,879 INFO L124 PetriNetUnfolderBase]: 7722/11912 cut-off events. [2024-06-27 18:22:40,879 INFO L125 PetriNetUnfolderBase]: For 639224/639258 co-relation queries the response was YES. [2024-06-27 18:22:40,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83207 conditions, 11912 events. 7722/11912 cut-off events. For 639224/639258 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 75459 event pairs, 2553 based on Foata normal form. 17/11710 useless extension candidates. Maximal degree in co-relation 83096. Up to 10896 conditions per place. [2024-06-27 18:22:41,024 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 303 selfloop transitions, 16 changer transitions 0/340 dead transitions. [2024-06-27 18:22:41,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 340 transitions, 4707 flow [2024-06-27 18:22:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:22:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:22:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 18:22:41,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 18:22:41,030 INFO L175 Difference]: Start difference. First operand has 250 places, 318 transitions, 3997 flow. Second operand 7 states and 154 transitions. [2024-06-27 18:22:41,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 340 transitions, 4707 flow [2024-06-27 18:22:41,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 340 transitions, 4129 flow, removed 102 selfloop flow, removed 13 redundant places. [2024-06-27 18:22:41,788 INFO L231 Difference]: Finished difference. Result has 244 places, 318 transitions, 3457 flow [2024-06-27 18:22:41,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3419, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3457, PETRI_PLACES=244, PETRI_TRANSITIONS=318} [2024-06-27 18:22:41,789 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 189 predicate places. [2024-06-27 18:22:41,789 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 318 transitions, 3457 flow [2024-06-27 18:22:41,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:41,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:41,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:41,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:22:41,789 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:41,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:41,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2011670176, now seen corresponding path program 2 times [2024-06-27 18:22:41,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:41,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103996374] [2024-06-27 18:22:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:41,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:42,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:42,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103996374] [2024-06-27 18:22:42,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103996374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:42,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:42,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:22:42,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271408803] [2024-06-27 18:22:42,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:42,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:22:42,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:42,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:22:42,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:22:42,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:22:42,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 318 transitions, 3457 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:42,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:42,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:22:42,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:44,548 INFO L124 PetriNetUnfolderBase]: 7379/11519 cut-off events. [2024-06-27 18:22:44,548 INFO L125 PetriNetUnfolderBase]: For 628356/628439 co-relation queries the response was YES. [2024-06-27 18:22:44,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77463 conditions, 11519 events. 7379/11519 cut-off events. For 628356/628439 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 74242 event pairs, 2492 based on Foata normal form. 40/11310 useless extension candidates. Maximal degree in co-relation 77357. Up to 10180 conditions per place. [2024-06-27 18:22:44,693 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 276 selfloop transitions, 22 changer transitions 0/348 dead transitions. [2024-06-27 18:22:44,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 348 transitions, 4303 flow [2024-06-27 18:22:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:22:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:22:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:22:44,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868804664723032 [2024-06-27 18:22:44,694 INFO L175 Difference]: Start difference. First operand has 244 places, 318 transitions, 3457 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:22:44,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 348 transitions, 4303 flow [2024-06-27 18:22:45,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 348 transitions, 4241 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 18:22:45,174 INFO L231 Difference]: Finished difference. Result has 244 places, 321 transitions, 3497 flow [2024-06-27 18:22:45,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3497, PETRI_PLACES=244, PETRI_TRANSITIONS=321} [2024-06-27 18:22:45,175 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 189 predicate places. [2024-06-27 18:22:45,175 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 321 transitions, 3497 flow [2024-06-27 18:22:45,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:45,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:45,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:22:45,176 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1425702468, now seen corresponding path program 3 times [2024-06-27 18:22:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:45,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579351713] [2024-06-27 18:22:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:45,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:45,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579351713] [2024-06-27 18:22:45,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579351713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:45,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:45,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:22:45,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847645424] [2024-06-27 18:22:45,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:45,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:22:45,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:22:45,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:22:46,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:22:46,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 321 transitions, 3497 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:46,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:46,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:22:46,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:48,015 INFO L124 PetriNetUnfolderBase]: 7370/11519 cut-off events. [2024-06-27 18:22:48,015 INFO L125 PetriNetUnfolderBase]: For 640719/640802 co-relation queries the response was YES. [2024-06-27 18:22:48,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77578 conditions, 11519 events. 7370/11519 cut-off events. For 640719/640802 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 74498 event pairs, 2498 based on Foata normal form. 40/11307 useless extension candidates. Maximal degree in co-relation 77471. Up to 10215 conditions per place. [2024-06-27 18:22:48,476 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 276 selfloop transitions, 17 changer transitions 0/343 dead transitions. [2024-06-27 18:22:48,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 343 transitions, 4145 flow [2024-06-27 18:22:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:22:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:22:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 18:22:48,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 18:22:48,477 INFO L175 Difference]: Start difference. First operand has 244 places, 321 transitions, 3497 flow. Second operand 7 states and 161 transitions. [2024-06-27 18:22:48,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 343 transitions, 4145 flow [2024-06-27 18:22:49,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 343 transitions, 4018 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 18:22:49,242 INFO L231 Difference]: Finished difference. Result has 246 places, 321 transitions, 3410 flow [2024-06-27 18:22:49,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3410, PETRI_PLACES=246, PETRI_TRANSITIONS=321} [2024-06-27 18:22:49,243 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 191 predicate places. [2024-06-27 18:22:49,243 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 321 transitions, 3410 flow [2024-06-27 18:22:49,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:49,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:49,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:49,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:22:49,243 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:49,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:49,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1834694307, now seen corresponding path program 1 times [2024-06-27 18:22:49,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:49,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551601698] [2024-06-27 18:22:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:49,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:49,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:49,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551601698] [2024-06-27 18:22:49,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551601698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:49,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:49,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:22:49,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488968722] [2024-06-27 18:22:49,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:49,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:22:49,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:49,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:22:49,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:22:50,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:50,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 321 transitions, 3410 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:50,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:50,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:50,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:52,235 INFO L124 PetriNetUnfolderBase]: 7830/12142 cut-off events. [2024-06-27 18:22:52,235 INFO L125 PetriNetUnfolderBase]: For 655262/655314 co-relation queries the response was YES. [2024-06-27 18:22:52,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80943 conditions, 12142 events. 7830/12142 cut-off events. For 655262/655314 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 77596 event pairs, 2582 based on Foata normal form. 40/11959 useless extension candidates. Maximal degree in co-relation 80836. Up to 10875 conditions per place. [2024-06-27 18:22:52,414 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 293 selfloop transitions, 25 changer transitions 0/355 dead transitions. [2024-06-27 18:22:52,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 355 transitions, 4182 flow [2024-06-27 18:22:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:22:52,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:22:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 18:22:52,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478134110787172 [2024-06-27 18:22:52,416 INFO L175 Difference]: Start difference. First operand has 246 places, 321 transitions, 3410 flow. Second operand 7 states and 164 transitions. [2024-06-27 18:22:52,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 355 transitions, 4182 flow [2024-06-27 18:22:53,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 355 transitions, 4133 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:22:53,293 INFO L231 Difference]: Finished difference. Result has 247 places, 324 transitions, 3475 flow [2024-06-27 18:22:53,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3475, PETRI_PLACES=247, PETRI_TRANSITIONS=324} [2024-06-27 18:22:53,294 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 192 predicate places. [2024-06-27 18:22:53,294 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 324 transitions, 3475 flow [2024-06-27 18:22:53,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:53,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:53,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:53,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:22:53,295 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:53,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:53,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1834814277, now seen corresponding path program 2 times [2024-06-27 18:22:53,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:53,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928861368] [2024-06-27 18:22:53,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:53,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:53,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:53,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928861368] [2024-06-27 18:22:53,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928861368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:53,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:53,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:22:53,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648141207] [2024-06-27 18:22:53,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:53,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:22:53,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:22:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:22:54,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:54,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 324 transitions, 3475 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:54,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:54,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:54,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:22:56,220 INFO L124 PetriNetUnfolderBase]: 7864/12199 cut-off events. [2024-06-27 18:22:56,220 INFO L125 PetriNetUnfolderBase]: For 676320/676372 co-relation queries the response was YES. [2024-06-27 18:22:56,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82472 conditions, 12199 events. 7864/12199 cut-off events. For 676320/676372 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 78074 event pairs, 2563 based on Foata normal form. 40/12013 useless extension candidates. Maximal degree in co-relation 82364. Up to 10841 conditions per place. [2024-06-27 18:22:56,394 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 287 selfloop transitions, 38 changer transitions 0/362 dead transitions. [2024-06-27 18:22:56,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 362 transitions, 4467 flow [2024-06-27 18:22:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:22:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:22:56,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:22:56,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868804664723032 [2024-06-27 18:22:56,395 INFO L175 Difference]: Start difference. First operand has 247 places, 324 transitions, 3475 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:22:56,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 362 transitions, 4467 flow [2024-06-27 18:22:57,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 362 transitions, 4379 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 18:22:57,706 INFO L231 Difference]: Finished difference. Result has 249 places, 330 transitions, 3587 flow [2024-06-27 18:22:57,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3387, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3587, PETRI_PLACES=249, PETRI_TRANSITIONS=330} [2024-06-27 18:22:57,706 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 194 predicate places. [2024-06-27 18:22:57,707 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 330 transitions, 3587 flow [2024-06-27 18:22:57,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:57,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:22:57,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:22:57,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:22:57,707 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:22:57,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:22:57,708 INFO L85 PathProgramCache]: Analyzing trace with hash -979385765, now seen corresponding path program 1 times [2024-06-27 18:22:57,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:22:57,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20285180] [2024-06-27 18:22:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:22:57,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:22:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:22:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:22:58,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:22:58,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20285180] [2024-06-27 18:22:58,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20285180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:22:58,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:22:58,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:22:58,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645581156] [2024-06-27 18:22:58,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:22:58,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:22:58,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:22:58,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:22:58,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:22:58,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:22:58,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 330 transitions, 3587 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:22:58,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:22:58,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:22:58,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:00,841 INFO L124 PetriNetUnfolderBase]: 7915/12273 cut-off events. [2024-06-27 18:23:00,841 INFO L125 PetriNetUnfolderBase]: For 702953/703005 co-relation queries the response was YES. [2024-06-27 18:23:00,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83947 conditions, 12273 events. 7915/12273 cut-off events. For 702953/703005 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 78577 event pairs, 2555 based on Foata normal form. 41/12086 useless extension candidates. Maximal degree in co-relation 83838. Up to 10897 conditions per place. [2024-06-27 18:23:01,008 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 303 selfloop transitions, 32 changer transitions 0/372 dead transitions. [2024-06-27 18:23:01,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 372 transitions, 4573 flow [2024-06-27 18:23:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:23:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:23:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 18:23:01,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-06-27 18:23:01,015 INFO L175 Difference]: Start difference. First operand has 249 places, 330 transitions, 3587 flow. Second operand 7 states and 170 transitions. [2024-06-27 18:23:01,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 372 transitions, 4573 flow [2024-06-27 18:23:01,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 372 transitions, 4493 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 18:23:01,860 INFO L231 Difference]: Finished difference. Result has 253 places, 336 transitions, 3647 flow [2024-06-27 18:23:01,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3647, PETRI_PLACES=253, PETRI_TRANSITIONS=336} [2024-06-27 18:23:01,861 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 198 predicate places. [2024-06-27 18:23:01,861 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 336 transitions, 3647 flow [2024-06-27 18:23:01,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:01,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:01,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:01,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:23:01,861 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:01,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:01,862 INFO L85 PathProgramCache]: Analyzing trace with hash -954935011, now seen corresponding path program 2 times [2024-06-27 18:23:01,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:01,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803082395] [2024-06-27 18:23:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:01,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:23:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:23:02,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:23:02,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803082395] [2024-06-27 18:23:02,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803082395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:23:02,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:23:02,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:23:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231403661] [2024-06-27 18:23:02,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:23:02,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:23:02,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:23:02,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:23:02,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:23:02,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:23:02,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 336 transitions, 3647 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:02,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:23:02,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:23:02,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:04,754 INFO L124 PetriNetUnfolderBase]: 7965/12350 cut-off events. [2024-06-27 18:23:04,755 INFO L125 PetriNetUnfolderBase]: For 723779/723833 co-relation queries the response was YES. [2024-06-27 18:23:04,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85634 conditions, 12350 events. 7965/12350 cut-off events. For 723779/723833 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 79098 event pairs, 2553 based on Foata normal form. 43/12164 useless extension candidates. Maximal degree in co-relation 85523. Up to 10939 conditions per place. [2024-06-27 18:23:04,918 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 299 selfloop transitions, 35 changer transitions 0/371 dead transitions. [2024-06-27 18:23:04,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 371 transitions, 4585 flow [2024-06-27 18:23:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:23:04,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:23:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:23:04,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868804664723032 [2024-06-27 18:23:04,920 INFO L175 Difference]: Start difference. First operand has 253 places, 336 transitions, 3647 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:23:04,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 371 transitions, 4585 flow [2024-06-27 18:23:05,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 371 transitions, 4526 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 18:23:05,890 INFO L231 Difference]: Finished difference. Result has 257 places, 339 transitions, 3702 flow [2024-06-27 18:23:05,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3594, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3702, PETRI_PLACES=257, PETRI_TRANSITIONS=339} [2024-06-27 18:23:05,891 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2024-06-27 18:23:05,891 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 339 transitions, 3702 flow [2024-06-27 18:23:05,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:05,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:05,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:05,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:23:05,892 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:05,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1425693571, now seen corresponding path program 3 times [2024-06-27 18:23:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:05,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801633501] [2024-06-27 18:23:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:05,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:23:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:23:06,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:23:06,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801633501] [2024-06-27 18:23:06,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801633501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:23:06,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:23:06,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:23:06,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927657550] [2024-06-27 18:23:06,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:23:06,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:23:06,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:23:06,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:23:06,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:23:06,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:23:06,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 339 transitions, 3702 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:06,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:23:06,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:23:06,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:09,105 INFO L124 PetriNetUnfolderBase]: 7956/12317 cut-off events. [2024-06-27 18:23:09,105 INFO L125 PetriNetUnfolderBase]: For 735397/735451 co-relation queries the response was YES. [2024-06-27 18:23:09,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85653 conditions, 12317 events. 7956/12317 cut-off events. For 735397/735451 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 78622 event pairs, 2545 based on Foata normal form. 43/12137 useless extension candidates. Maximal degree in co-relation 85540. Up to 10932 conditions per place. [2024-06-27 18:23:09,260 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 295 selfloop transitions, 36 changer transitions 0/368 dead transitions. [2024-06-27 18:23:09,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 368 transitions, 4466 flow [2024-06-27 18:23:09,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:23:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:23:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 18:23:09,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752186588921283 [2024-06-27 18:23:09,262 INFO L175 Difference]: Start difference. First operand has 257 places, 339 transitions, 3702 flow. Second operand 7 states and 163 transitions. [2024-06-27 18:23:09,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 368 transitions, 4466 flow [2024-06-27 18:23:10,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 368 transitions, 4356 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 18:23:10,176 INFO L231 Difference]: Finished difference. Result has 259 places, 339 transitions, 3671 flow [2024-06-27 18:23:10,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3671, PETRI_PLACES=259, PETRI_TRANSITIONS=339} [2024-06-27 18:23:10,177 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 204 predicate places. [2024-06-27 18:23:10,177 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 339 transitions, 3671 flow [2024-06-27 18:23:10,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:10,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:10,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:10,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:23:10,178 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:10,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:10,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2011945797, now seen corresponding path program 3 times [2024-06-27 18:23:10,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:10,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109243421] [2024-06-27 18:23:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:10,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:23:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:23:10,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:23:10,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109243421] [2024-06-27 18:23:10,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109243421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:23:10,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:23:10,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:23:10,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462089892] [2024-06-27 18:23:10,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:23:10,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:23:10,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:23:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:23:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:23:10,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:23:10,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 339 transitions, 3671 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:10,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:23:10,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:23:10,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:13,318 INFO L124 PetriNetUnfolderBase]: 7950/12330 cut-off events. [2024-06-27 18:23:13,318 INFO L125 PetriNetUnfolderBase]: For 746202/746256 co-relation queries the response was YES. [2024-06-27 18:23:13,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85552 conditions, 12330 events. 7950/12330 cut-off events. For 746202/746256 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 79062 event pairs, 2571 based on Foata normal form. 40/12142 useless extension candidates. Maximal degree in co-relation 85438. Up to 10962 conditions per place. [2024-06-27 18:23:13,512 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 292 selfloop transitions, 38 changer transitions 0/367 dead transitions. [2024-06-27 18:23:13,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 367 transitions, 4433 flow [2024-06-27 18:23:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:23:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:23:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 18:23:13,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752186588921283 [2024-06-27 18:23:13,513 INFO L175 Difference]: Start difference. First operand has 259 places, 339 transitions, 3671 flow. Second operand 7 states and 163 transitions. [2024-06-27 18:23:13,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 367 transitions, 4433 flow [2024-06-27 18:23:14,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 367 transitions, 4322 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 18:23:14,603 INFO L231 Difference]: Finished difference. Result has 260 places, 339 transitions, 3642 flow [2024-06-27 18:23:14,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3642, PETRI_PLACES=260, PETRI_TRANSITIONS=339} [2024-06-27 18:23:14,603 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 205 predicate places. [2024-06-27 18:23:14,603 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 339 transitions, 3642 flow [2024-06-27 18:23:14,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:14,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:14,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:14,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:23:14,604 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:14,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1432139176, now seen corresponding path program 1 times [2024-06-27 18:23:14,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:14,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657896356] [2024-06-27 18:23:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:14,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:23:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:23:16,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:23:16,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657896356] [2024-06-27 18:23:16,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657896356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:23:16,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:23:16,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:23:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808637198] [2024-06-27 18:23:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:23:16,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:23:16,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:23:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:23:16,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:23:16,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:23:16,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 339 transitions, 3642 flow. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:16,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:23:16,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:23:16,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:19,028 INFO L124 PetriNetUnfolderBase]: 7707/11732 cut-off events. [2024-06-27 18:23:19,028 INFO L125 PetriNetUnfolderBase]: For 852967/852997 co-relation queries the response was YES. [2024-06-27 18:23:19,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89148 conditions, 11732 events. 7707/11732 cut-off events. For 852967/852997 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 73886 event pairs, 1444 based on Foata normal form. 20/11574 useless extension candidates. Maximal degree in co-relation 89033. Up to 9974 conditions per place. [2024-06-27 18:23:19,206 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 359 selfloop transitions, 50 changer transitions 0/443 dead transitions. [2024-06-27 18:23:19,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 443 transitions, 5214 flow [2024-06-27 18:23:19,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:23:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:23:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 318 transitions. [2024-06-27 18:23:19,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-06-27 18:23:19,208 INFO L175 Difference]: Start difference. First operand has 260 places, 339 transitions, 3642 flow. Second operand 12 states and 318 transitions. [2024-06-27 18:23:19,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 443 transitions, 5214 flow [2024-06-27 18:23:20,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 443 transitions, 5105 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:23:20,253 INFO L231 Difference]: Finished difference. Result has 266 places, 341 transitions, 3769 flow [2024-06-27 18:23:20,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3769, PETRI_PLACES=266, PETRI_TRANSITIONS=341} [2024-06-27 18:23:20,253 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 211 predicate places. [2024-06-27 18:23:20,253 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 341 transitions, 3769 flow [2024-06-27 18:23:20,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:20,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:20,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:20,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:23:20,254 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:20,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash 740242488, now seen corresponding path program 2 times [2024-06-27 18:23:20,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:20,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204569658] [2024-06-27 18:23:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:20,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:23:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:23:21,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:23:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204569658] [2024-06-27 18:23:21,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204569658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:23:21,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:23:21,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:23:21,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943628827] [2024-06-27 18:23:21,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:23:21,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:23:21,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:23:21,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:23:21,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:23:22,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:23:22,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 341 transitions, 3769 flow. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:22,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:23:22,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:23:22,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:24,845 INFO L124 PetriNetUnfolderBase]: 7840/11955 cut-off events. [2024-06-27 18:23:24,845 INFO L125 PetriNetUnfolderBase]: For 912895/912923 co-relation queries the response was YES. [2024-06-27 18:23:24,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92754 conditions, 11955 events. 7840/11955 cut-off events. For 912895/912923 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 75772 event pairs, 1743 based on Foata normal form. 24/11801 useless extension candidates. Maximal degree in co-relation 92638. Up to 10462 conditions per place. [2024-06-27 18:23:25,021 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 357 selfloop transitions, 48 changer transitions 0/439 dead transitions. [2024-06-27 18:23:25,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 439 transitions, 5013 flow [2024-06-27 18:23:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:23:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:23:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 314 transitions. [2024-06-27 18:23:25,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340136054421769 [2024-06-27 18:23:25,022 INFO L175 Difference]: Start difference. First operand has 266 places, 341 transitions, 3769 flow. Second operand 12 states and 314 transitions. [2024-06-27 18:23:25,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 439 transitions, 5013 flow [2024-06-27 18:23:26,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 439 transitions, 4894 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 18:23:26,346 INFO L231 Difference]: Finished difference. Result has 270 places, 342 transitions, 3821 flow [2024-06-27 18:23:26,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3660, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3821, PETRI_PLACES=270, PETRI_TRANSITIONS=342} [2024-06-27 18:23:26,346 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 215 predicate places. [2024-06-27 18:23:26,346 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 342 transitions, 3821 flow [2024-06-27 18:23:26,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:26,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:26,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:26,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:23:26,347 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:26,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1434996136, now seen corresponding path program 3 times [2024-06-27 18:23:26,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:26,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035764483] [2024-06-27 18:23:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:26,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:23:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:23:27,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:23:27,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035764483] [2024-06-27 18:23:27,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035764483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:23:27,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:23:27,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:23:27,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657521954] [2024-06-27 18:23:27,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:23:27,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:23:27,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:23:27,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:23:27,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:23:28,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:23:28,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 342 transitions, 3821 flow. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:28,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:23:28,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:23:28,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:30,859 INFO L124 PetriNetUnfolderBase]: 7778/11873 cut-off events. [2024-06-27 18:23:30,859 INFO L125 PetriNetUnfolderBase]: For 874542/874570 co-relation queries the response was YES. [2024-06-27 18:23:30,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90186 conditions, 11873 events. 7778/11873 cut-off events. For 874542/874570 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 75331 event pairs, 1713 based on Foata normal form. 24/11719 useless extension candidates. Maximal degree in co-relation 90068. Up to 10426 conditions per place. [2024-06-27 18:23:31,009 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 351 selfloop transitions, 42 changer transitions 0/427 dead transitions. [2024-06-27 18:23:31,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 427 transitions, 4933 flow [2024-06-27 18:23:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:23:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:23:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 285 transitions. [2024-06-27 18:23:31,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287569573283859 [2024-06-27 18:23:31,011 INFO L175 Difference]: Start difference. First operand has 270 places, 342 transitions, 3821 flow. Second operand 11 states and 285 transitions. [2024-06-27 18:23:31,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 427 transitions, 4933 flow [2024-06-27 18:23:32,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 427 transitions, 4786 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-27 18:23:32,268 INFO L231 Difference]: Finished difference. Result has 271 places, 342 transitions, 3765 flow [2024-06-27 18:23:32,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3674, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3765, PETRI_PLACES=271, PETRI_TRANSITIONS=342} [2024-06-27 18:23:32,269 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 216 predicate places. [2024-06-27 18:23:32,269 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 342 transitions, 3765 flow [2024-06-27 18:23:32,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:32,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:32,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:32,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:23:32,270 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:32,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:32,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1550472004, now seen corresponding path program 1 times [2024-06-27 18:23:32,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:32,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494495647] [2024-06-27 18:23:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:32,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:23:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:23:33,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:23:33,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494495647] [2024-06-27 18:23:33,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494495647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:23:33,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:23:33,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:23:33,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029680249] [2024-06-27 18:23:33,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:23:33,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:23:33,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:23:33,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:23:33,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:23:34,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:23:34,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 342 transitions, 3765 flow. Second operand has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:34,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:23:34,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:23:34,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:36,481 INFO L124 PetriNetUnfolderBase]: 8509/13053 cut-off events. [2024-06-27 18:23:36,481 INFO L125 PetriNetUnfolderBase]: For 886545/886589 co-relation queries the response was YES. [2024-06-27 18:23:36,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95699 conditions, 13053 events. 8509/13053 cut-off events. For 886545/886589 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 83013 event pairs, 1894 based on Foata normal form. 4/12817 useless extension candidates. Maximal degree in co-relation 95580. Up to 11116 conditions per place. [2024-06-27 18:23:37,021 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 322 selfloop transitions, 76 changer transitions 0/419 dead transitions. [2024-06-27 18:23:37,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 419 transitions, 4928 flow [2024-06-27 18:23:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:23:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:23:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 18:23:37,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-27 18:23:37,022 INFO L175 Difference]: Start difference. First operand has 271 places, 342 transitions, 3765 flow. Second operand 10 states and 255 transitions. [2024-06-27 18:23:37,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 419 transitions, 4928 flow [2024-06-27 18:23:38,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 419 transitions, 4834 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 18:23:38,271 INFO L231 Difference]: Finished difference. Result has 272 places, 347 transitions, 3953 flow [2024-06-27 18:23:38,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3671, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3953, PETRI_PLACES=272, PETRI_TRANSITIONS=347} [2024-06-27 18:23:38,272 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 217 predicate places. [2024-06-27 18:23:38,272 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 347 transitions, 3953 flow [2024-06-27 18:23:38,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:38,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:38,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:38,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:23:38,272 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:38,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1550287306, now seen corresponding path program 4 times [2024-06-27 18:23:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:38,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41121806] [2024-06-27 18:23:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:38,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:23:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:23:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:23:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41121806] [2024-06-27 18:23:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41121806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:23:39,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:23:39,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:23:39,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125100159] [2024-06-27 18:23:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:23:39,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:23:39,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:23:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:23:39,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:23:40,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:23:40,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 347 transitions, 3953 flow. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:40,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:23:40,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:23:40,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:42,991 INFO L124 PetriNetUnfolderBase]: 8038/12122 cut-off events. [2024-06-27 18:23:42,991 INFO L125 PetriNetUnfolderBase]: For 944899/944935 co-relation queries the response was YES. [2024-06-27 18:23:43,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94435 conditions, 12122 events. 8038/12122 cut-off events. For 944899/944935 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 75622 event pairs, 1345 based on Foata normal form. 24/12003 useless extension candidates. Maximal degree in co-relation 94314. Up to 9727 conditions per place. [2024-06-27 18:23:43,150 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 247 selfloop transitions, 155 changer transitions 0/437 dead transitions. [2024-06-27 18:23:43,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 437 transitions, 5403 flow [2024-06-27 18:23:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:23:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:23:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 295 transitions. [2024-06-27 18:23:43,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473098330241187 [2024-06-27 18:23:43,152 INFO L175 Difference]: Start difference. First operand has 272 places, 347 transitions, 3953 flow. Second operand 11 states and 295 transitions. [2024-06-27 18:23:43,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 437 transitions, 5403 flow [2024-06-27 18:23:44,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 437 transitions, 5170 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 18:23:44,801 INFO L231 Difference]: Finished difference. Result has 276 places, 348 transitions, 4107 flow [2024-06-27 18:23:44,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3720, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4107, PETRI_PLACES=276, PETRI_TRANSITIONS=348} [2024-06-27 18:23:44,801 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 221 predicate places. [2024-06-27 18:23:44,802 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 348 transitions, 4107 flow [2024-06-27 18:23:44,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:44,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:44,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:44,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:23:44,802 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:44,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:44,802 INFO L85 PathProgramCache]: Analyzing trace with hash -290473760, now seen corresponding path program 5 times [2024-06-27 18:23:44,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:44,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239947613] [2024-06-27 18:23:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:44,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:23:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:23:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:23:46,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239947613] [2024-06-27 18:23:46,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239947613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:23:46,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:23:46,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:23:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840893292] [2024-06-27 18:23:46,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:23:46,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:23:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:23:46,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:23:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:23:46,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 18:23:46,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 348 transitions, 4107 flow. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:46,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:23:46,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 18:23:46,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:49,921 INFO L124 PetriNetUnfolderBase]: 8183/12357 cut-off events. [2024-06-27 18:23:49,921 INFO L125 PetriNetUnfolderBase]: For 1001531/1001567 co-relation queries the response was YES. [2024-06-27 18:23:50,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97827 conditions, 12357 events. 8183/12357 cut-off events. For 1001531/1001567 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 77464 event pairs, 1374 based on Foata normal form. 24/12247 useless extension candidates. Maximal degree in co-relation 97705. Up to 9962 conditions per place. [2024-06-27 18:23:50,088 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 256 selfloop transitions, 144 changer transitions 0/435 dead transitions. [2024-06-27 18:23:50,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 435 transitions, 5551 flow [2024-06-27 18:23:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:23:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:23:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 293 transitions. [2024-06-27 18:23:50,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435992578849722 [2024-06-27 18:23:50,089 INFO L175 Difference]: Start difference. First operand has 276 places, 348 transitions, 4107 flow. Second operand 11 states and 293 transitions. [2024-06-27 18:23:50,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 435 transitions, 5551 flow [2024-06-27 18:23:51,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 435 transitions, 5202 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 18:23:51,858 INFO L231 Difference]: Finished difference. Result has 278 places, 349 transitions, 4125 flow [2024-06-27 18:23:51,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4125, PETRI_PLACES=278, PETRI_TRANSITIONS=349} [2024-06-27 18:23:51,859 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 223 predicate places. [2024-06-27 18:23:51,859 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 349 transitions, 4125 flow [2024-06-27 18:23:51,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:51,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:51,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:51,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:23:51,860 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:51,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:51,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1127161690, now seen corresponding path program 2 times [2024-06-27 18:23:51,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:51,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227114923] [2024-06-27 18:23:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:51,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:23:53,608 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 18:23:53,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:23:53,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227114923] [2024-06-27 18:23:53,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227114923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:23:53,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:23:53,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:23:53,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139483118] [2024-06-27 18:23:53,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:23:53,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:23:53,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:23:53,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:23:53,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:23:53,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:23:53,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 349 transitions, 4125 flow. Second operand has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:53,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:23:53,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:23:53,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:23:56,964 INFO L124 PetriNetUnfolderBase]: 8987/13812 cut-off events. [2024-06-27 18:23:56,964 INFO L125 PetriNetUnfolderBase]: For 1014063/1014107 co-relation queries the response was YES. [2024-06-27 18:23:57,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104942 conditions, 13812 events. 8987/13812 cut-off events. For 1014063/1014107 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 88992 event pairs, 2033 based on Foata normal form. 4/13574 useless extension candidates. Maximal degree in co-relation 104819. Up to 11814 conditions per place. [2024-06-27 18:23:57,363 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 332 selfloop transitions, 72 changer transitions 0/425 dead transitions. [2024-06-27 18:23:57,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 425 transitions, 5326 flow [2024-06-27 18:23:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:23:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:23:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 18:23:57,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-27 18:23:57,364 INFO L175 Difference]: Start difference. First operand has 278 places, 349 transitions, 4125 flow. Second operand 10 states and 255 transitions. [2024-06-27 18:23:57,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 425 transitions, 5326 flow [2024-06-27 18:23:58,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 425 transitions, 4991 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 18:23:58,951 INFO L231 Difference]: Finished difference. Result has 280 places, 355 transitions, 4094 flow [2024-06-27 18:23:58,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3796, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4094, PETRI_PLACES=280, PETRI_TRANSITIONS=355} [2024-06-27 18:23:58,951 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 225 predicate places. [2024-06-27 18:23:58,951 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 355 transitions, 4094 flow [2024-06-27 18:23:58,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:23:58,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:23:58,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:23:58,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:23:58,952 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:23:58,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:23:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1120674940, now seen corresponding path program 3 times [2024-06-27 18:23:58,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:23:58,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071854240] [2024-06-27 18:23:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:23:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:23:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:24:00,665 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 18:24:00,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:24:00,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071854240] [2024-06-27 18:24:00,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071854240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:24:00,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:24:00,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:24:00,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931266895] [2024-06-27 18:24:00,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:24:00,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:24:00,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:24:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:24:00,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:24:00,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:24:00,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 355 transitions, 4094 flow. Second operand has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:24:00,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:24:00,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:24:00,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:24:04,416 INFO L124 PetriNetUnfolderBase]: 9024/13872 cut-off events. [2024-06-27 18:24:04,417 INFO L125 PetriNetUnfolderBase]: For 1016292/1016336 co-relation queries the response was YES. [2024-06-27 18:24:04,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104883 conditions, 13872 events. 9024/13872 cut-off events. For 1016292/1016336 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 89401 event pairs, 2034 based on Foata normal form. 4/13632 useless extension candidates. Maximal degree in co-relation 104758. Up to 11869 conditions per place. [2024-06-27 18:24:04,620 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 332 selfloop transitions, 75 changer transitions 0/428 dead transitions. [2024-06-27 18:24:04,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 428 transitions, 5280 flow [2024-06-27 18:24:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:24:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:24:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-27 18:24:04,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163265306122449 [2024-06-27 18:24:04,621 INFO L175 Difference]: Start difference. First operand has 280 places, 355 transitions, 4094 flow. Second operand 10 states and 253 transitions. [2024-06-27 18:24:04,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 428 transitions, 5280 flow [2024-06-27 18:24:06,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 428 transitions, 5041 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 18:24:06,010 INFO L231 Difference]: Finished difference. Result has 283 places, 359 transitions, 4138 flow [2024-06-27 18:24:06,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3859, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4138, PETRI_PLACES=283, PETRI_TRANSITIONS=359} [2024-06-27 18:24:06,011 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 228 predicate places. [2024-06-27 18:24:06,011 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 359 transitions, 4138 flow [2024-06-27 18:24:06,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:24:06,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:24:06,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:24:06,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 18:24:06,012 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:24:06,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:24:06,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1120666570, now seen corresponding path program 4 times [2024-06-27 18:24:06,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:24:06,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689276185] [2024-06-27 18:24:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:24:06,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:24:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:24:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:24:07,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:24:07,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689276185] [2024-06-27 18:24:07,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689276185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:24:07,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:24:07,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:24:07,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277813173] [2024-06-27 18:24:07,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:24:07,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:24:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:24:07,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:24:07,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:24:07,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:24:07,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 359 transitions, 4138 flow. Second operand has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:24:07,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:24:07,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:24:07,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:24:11,373 INFO L124 PetriNetUnfolderBase]: 9088/14039 cut-off events. [2024-06-27 18:24:11,373 INFO L125 PetriNetUnfolderBase]: For 1051016/1051060 co-relation queries the response was YES. [2024-06-27 18:24:11,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106136 conditions, 14039 events. 9088/14039 cut-off events. For 1051016/1051060 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 91383 event pairs, 2031 based on Foata normal form. 4/13752 useless extension candidates. Maximal degree in co-relation 106010. Up to 11820 conditions per place. [2024-06-27 18:24:11,590 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 327 selfloop transitions, 82 changer transitions 0/430 dead transitions. [2024-06-27 18:24:11,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 430 transitions, 5302 flow [2024-06-27 18:24:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:24:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:24:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-27 18:24:11,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163265306122449 [2024-06-27 18:24:11,592 INFO L175 Difference]: Start difference. First operand has 283 places, 359 transitions, 4138 flow. Second operand 10 states and 253 transitions. [2024-06-27 18:24:11,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 430 transitions, 5302 flow [2024-06-27 18:24:13,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 430 transitions, 5079 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 18:24:13,498 INFO L231 Difference]: Finished difference. Result has 287 places, 361 transitions, 4188 flow [2024-06-27 18:24:13,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4188, PETRI_PLACES=287, PETRI_TRANSITIONS=361} [2024-06-27 18:24:13,499 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 232 predicate places. [2024-06-27 18:24:13,499 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 361 transitions, 4188 flow [2024-06-27 18:24:13,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:24:13,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:24:13,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:24:13,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 18:24:13,499 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:24:13,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:24:13,500 INFO L85 PathProgramCache]: Analyzing trace with hash 42414602, now seen corresponding path program 1 times [2024-06-27 18:24:13,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:24:13,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897435419] [2024-06-27 18:24:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:24:13,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:24:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:24:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:24:14,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:24:14,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897435419] [2024-06-27 18:24:14,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897435419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:24:14,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:24:14,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:24:14,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071105126] [2024-06-27 18:24:14,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:24:14,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:24:14,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:24:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:24:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:24:14,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 18:24:14,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 361 transitions, 4188 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:24:14,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:24:14,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 18:24:14,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand