./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe014_rmo.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/safe014_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe014_rmo.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 18:56:24,817 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:56:24,893 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:56:24,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:56:24,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:56:24,925 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:56:24,926 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:56:24,926 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:56:24,927 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:56:24,930 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:56:24,930 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:56:24,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:56:24,931 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:56:24,932 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:56:24,933 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:56:24,933 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:56:24,933 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:56:24,933 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:56:24,933 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:56:24,934 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:56:24,934 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:56:24,934 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:56:24,935 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:56:24,935 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:56:24,935 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:56:24,935 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:56:24,935 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:56:24,936 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:56:24,936 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:56:24,937 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:56:24,938 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:56:24,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:56:24,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:56:24,938 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:56:24,939 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:56:24,939 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:56:24,939 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:56:24,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:56:24,940 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:56:24,940 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:56:24,940 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:56:24,940 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:56:24,941 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:56:24,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:56:25,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:56:25,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:56:25,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:56:25,216 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:56:25,216 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:56:25,217 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe014_rmo.oepc.yml/witness.yml [2024-06-27 18:56:25,466 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:56:25,467 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:56:25,468 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i [2024-06-27 18:56:26,556 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:56:26,753 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:56:26,754 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i [2024-06-27 18:56:26,763 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ade760db/4649e6fa42b6489394d4eef0734a97e6/FLAGe7973c8b7 [2024-06-27 18:56:26,773 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ade760db/4649e6fa42b6489394d4eef0734a97e6 [2024-06-27 18:56:26,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:56:26,774 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:56:26,775 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:56:26,775 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:56:26,779 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:56:26,780 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:56:25" (1/2) ... [2024-06-27 18:56:26,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd7f271 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:26, skipping insertion in model container [2024-06-27 18:56:26,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:56:25" (1/2) ... [2024-06-27 18:56:26,781 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@746946d4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:26, skipping insertion in model container [2024-06-27 18:56:26,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:56:26" (2/2) ... [2024-06-27 18:56:26,782 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd7f271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:26, skipping insertion in model container [2024-06-27 18:56:26,782 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:56:26" (2/2) ... [2024-06-27 18:56:26,782 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:56:26,881 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:56:26,881 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:56:26,882 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:56:26,882 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:56:26,882 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:56:26,882 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-27 18:56:26,918 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:56:27,050 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/safe014_rmo.oepc.i[993,1006] [2024-06-27 18:56:27,245 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:56:27,256 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:56:27,287 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/safe014_rmo.oepc.i[993,1006] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:56:27,370 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:56:27,397 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:56:27,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27 WrapperNode [2024-06-27 18:56:27,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:56:27,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:56:27,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:56:27,400 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:56:27,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,442 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,481 INFO L138 Inliner]: procedures = 175, calls = 67, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 170 [2024-06-27 18:56:27,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:56:27,482 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:56:27,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:56:27,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:56:27,492 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,509 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,539 INFO L175 MemorySlicer]: Split 27 memory accesses to 2 slices as follows [2, 25]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-27 18:56:27,541 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,541 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,562 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,564 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:56:27,582 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:56:27,582 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:56:27,582 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:56:27,583 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (1/1) ... [2024-06-27 18:56:27,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:56:27,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:56:27,623 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 18:56:27,664 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 18:56:27,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:56:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:56:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:56:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:56:27,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:56:27,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:56:27,756 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:56:27,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:56:27,756 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:56:27,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:56:27,757 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:56:27,757 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:56:27,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:56:27,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:56:27,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:56:27,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:56:27,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:56:27,761 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 18:56:27,900 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:56:27,902 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:56:28,258 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:56:28,258 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:56:28,548 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:56:28,548 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:56:28,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:56:28 BoogieIcfgContainer [2024-06-27 18:56:28,549 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:56:28,552 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:56:28,552 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:56:28,555 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:56:28,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:56:25" (1/4) ... [2024-06-27 18:56:28,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7349856a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:56:28, skipping insertion in model container [2024-06-27 18:56:28,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:56:26" (2/4) ... [2024-06-27 18:56:28,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7349856a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:56:28, skipping insertion in model container [2024-06-27 18:56:28,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:27" (3/4) ... [2024-06-27 18:56:28,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7349856a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:56:28, skipping insertion in model container [2024-06-27 18:56:28,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:56:28" (4/4) ... [2024-06-27 18:56:28,558 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_rmo.oepc.i [2024-06-27 18:56:28,575 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:56:28,575 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:56:28,575 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:56:28,632 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:56:28,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:56:28,699 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 18:56:28,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:56:28,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 18:56:28,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:56:28,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 18:56:28,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:56:28,730 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;@2a1e030a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:56:28,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:56:28,735 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:56:28,735 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:56:28,735 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:56:28,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:28,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:56:28,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:28,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:28,742 INFO L85 PathProgramCache]: Analyzing trace with hash 560830374, now seen corresponding path program 1 times [2024-06-27 18:56:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:28,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507455107] [2024-06-27 18:56:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:28,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:30,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:30,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507455107] [2024-06-27 18:56:30,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507455107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:30,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:30,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:56:30,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456717070] [2024-06-27 18:56:30,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:30,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:56:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:56:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:56:30,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 18:56:30,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:30,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:30,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 18:56:30,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:31,114 INFO L124 PetriNetUnfolderBase]: 2180/3473 cut-off events. [2024-06-27 18:56:31,114 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 18:56:31,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 3473 events. 2180/3473 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19849 event pairs, 1317 based on Foata normal form. 0/3340 useless extension candidates. Maximal degree in co-relation 6714. Up to 3184 conditions per place. [2024-06-27 18:56:31,131 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-27 18:56:31,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 227 flow [2024-06-27 18:56:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:56:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:56:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-27 18:56:31,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-27 18:56:31,141 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 93 transitions. [2024-06-27 18:56:31,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 227 flow [2024-06-27 18:56:31,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:56:31,145 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 18:56:31,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 18:56:31,148 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 18:56:31,149 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 18:56:31,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:31,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:31,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:31,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:56:31,150 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:31,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2087120485, now seen corresponding path program 1 times [2024-06-27 18:56:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:31,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634538406] [2024-06-27 18:56:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:31,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:33,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:33,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634538406] [2024-06-27 18:56:33,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634538406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:33,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:33,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:56:33,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788143762] [2024-06-27 18:56:33,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:33,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:56:33,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:56:33,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:56:33,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 18:56:33,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:33,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:33,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 18:56:33,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:34,014 INFO L124 PetriNetUnfolderBase]: 2174/3323 cut-off events. [2024-06-27 18:56:34,014 INFO L125 PetriNetUnfolderBase]: For 604/614 co-relation queries the response was YES. [2024-06-27 18:56:34,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7442 conditions, 3323 events. 2174/3323 cut-off events. For 604/614 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18219 event pairs, 893 based on Foata normal form. 6/3323 useless extension candidates. Maximal degree in co-relation 7430. Up to 3142 conditions per place. [2024-06-27 18:56:34,032 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 60 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-27 18:56:34,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 355 flow [2024-06-27 18:56:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:56:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:56:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-27 18:56:34,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-06-27 18:56:34,037 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 126 transitions. [2024-06-27 18:56:34,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 355 flow [2024-06-27 18:56:34,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:34,040 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-27 18:56:34,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-27 18:56:34,044 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 18:56:34,044 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-27 18:56:34,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:34,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:34,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:34,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:56:34,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:34,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash -833777383, now seen corresponding path program 1 times [2024-06-27 18:56:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:34,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628535497] [2024-06-27 18:56:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:34,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:36,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:36,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628535497] [2024-06-27 18:56:36,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628535497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:36,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:36,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:56:36,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735579767] [2024-06-27 18:56:36,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:36,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:56:36,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:56:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:56:36,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:56:36,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:36,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:36,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:56:36,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:37,974 INFO L124 PetriNetUnfolderBase]: 2769/4162 cut-off events. [2024-06-27 18:56:37,975 INFO L125 PetriNetUnfolderBase]: For 2308/2338 co-relation queries the response was YES. [2024-06-27 18:56:37,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10435 conditions, 4162 events. 2769/4162 cut-off events. For 2308/2338 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22470 event pairs, 709 based on Foata normal form. 15/4169 useless extension candidates. Maximal degree in co-relation 10420. Up to 3890 conditions per place. [2024-06-27 18:56:37,999 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 87 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2024-06-27 18:56:37,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 546 flow [2024-06-27 18:56:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 18:56:38,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:56:38,004 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 6 states and 180 transitions. [2024-06-27 18:56:38,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 546 flow [2024-06-27 18:56:38,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 111 transitions, 546 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:56:38,013 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 258 flow [2024-06-27 18:56:38,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 18:56:38,014 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2024-06-27 18:56:38,014 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 258 flow [2024-06-27 18:56:38,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:38,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:38,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:56:38,016 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:38,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1085519080, now seen corresponding path program 1 times [2024-06-27 18:56:38,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:38,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802287445] [2024-06-27 18:56:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:38,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:39,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:39,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802287445] [2024-06-27 18:56:39,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802287445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:39,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:39,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:56:39,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093958116] [2024-06-27 18:56:39,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:39,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:56:39,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:39,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:56:39,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:56:39,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:39,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:39,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:39,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:39,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:40,406 INFO L124 PetriNetUnfolderBase]: 3310/5149 cut-off events. [2024-06-27 18:56:40,407 INFO L125 PetriNetUnfolderBase]: For 4482/4482 co-relation queries the response was YES. [2024-06-27 18:56:40,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13605 conditions, 5149 events. 3310/5149 cut-off events. For 4482/4482 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29194 event pairs, 1324 based on Foata normal form. 2/5147 useless extension candidates. Maximal degree in co-relation 13585. Up to 4735 conditions per place. [2024-06-27 18:56:40,440 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 70 selfloop transitions, 13 changer transitions 0/90 dead transitions. [2024-06-27 18:56:40,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 542 flow [2024-06-27 18:56:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:56:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:56:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 18:56:40,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234042553191489 [2024-06-27 18:56:40,443 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 258 flow. Second operand 5 states and 123 transitions. [2024-06-27 18:56:40,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 542 flow [2024-06-27 18:56:40,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 509 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 18:56:40,447 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 337 flow [2024-06-27 18:56:40,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-27 18:56:40,449 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2024-06-27 18:56:40,449 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 337 flow [2024-06-27 18:56:40,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:40,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:40,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:40,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:56:40,450 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:40,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:40,451 INFO L85 PathProgramCache]: Analyzing trace with hash 709749901, now seen corresponding path program 1 times [2024-06-27 18:56:40,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:40,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611912663] [2024-06-27 18:56:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:40,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:41,736 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 18:56:41,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:41,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611912663] [2024-06-27 18:56:41,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611912663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:41,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:41,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:56:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248425724] [2024-06-27 18:56:41,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:41,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:56:41,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:56:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:56:41,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:41,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:41,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:41,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:41,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:42,875 INFO L124 PetriNetUnfolderBase]: 3305/5151 cut-off events. [2024-06-27 18:56:42,875 INFO L125 PetriNetUnfolderBase]: For 6141/6144 co-relation queries the response was YES. [2024-06-27 18:56:42,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14872 conditions, 5151 events. 3305/5151 cut-off events. For 6141/6144 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29302 event pairs, 1337 based on Foata normal form. 4/5152 useless extension candidates. Maximal degree in co-relation 14849. Up to 4730 conditions per place. [2024-06-27 18:56:42,901 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 69 selfloop transitions, 13 changer transitions 0/89 dead transitions. [2024-06-27 18:56:42,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 556 flow [2024-06-27 18:56:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:56:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:56:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 18:56:42,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-27 18:56:42,907 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 337 flow. Second operand 5 states and 121 transitions. [2024-06-27 18:56:42,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 556 flow [2024-06-27 18:56:42,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 548 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:42,915 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 369 flow [2024-06-27 18:56:42,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-27 18:56:42,918 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-06-27 18:56:42,918 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 369 flow [2024-06-27 18:56:42,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:42,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:42,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:42,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:56:42,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:42,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1299294779, now seen corresponding path program 1 times [2024-06-27 18:56:42,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:42,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240010530] [2024-06-27 18:56:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:42,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:45,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:45,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240010530] [2024-06-27 18:56:45,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240010530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:45,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:45,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:56:45,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236206991] [2024-06-27 18:56:45,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:45,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:56:45,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:45,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:56:45,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:56:45,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:45,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 369 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:45,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:45,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:45,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:46,851 INFO L124 PetriNetUnfolderBase]: 3336/4962 cut-off events. [2024-06-27 18:56:46,851 INFO L125 PetriNetUnfolderBase]: For 7002/7002 co-relation queries the response was YES. [2024-06-27 18:56:46,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15002 conditions, 4962 events. 3336/4962 cut-off events. For 7002/7002 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26653 event pairs, 1003 based on Foata normal form. 2/4959 useless extension candidates. Maximal degree in co-relation 14976. Up to 4633 conditions per place. [2024-06-27 18:56:46,882 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 96 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-06-27 18:56:46,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 124 transitions, 802 flow [2024-06-27 18:56:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 18:56:46,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-27 18:56:46,884 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 369 flow. Second operand 6 states and 157 transitions. [2024-06-27 18:56:46,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 124 transitions, 802 flow [2024-06-27 18:56:46,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 124 transitions, 783 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 18:56:46,894 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 501 flow [2024-06-27 18:56:46,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=501, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-27 18:56:46,897 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-06-27 18:56:46,897 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 501 flow [2024-06-27 18:56:46,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:46,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:46,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:46,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:56:46,898 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:46,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:46,899 INFO L85 PathProgramCache]: Analyzing trace with hash 527172869, now seen corresponding path program 2 times [2024-06-27 18:56:46,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:46,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970524143] [2024-06-27 18:56:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:48,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:48,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970524143] [2024-06-27 18:56:48,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970524143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:48,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:48,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:56:48,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760023264] [2024-06-27 18:56:48,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:48,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:56:48,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:56:48,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:56:48,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:48,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 501 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:48,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:48,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:48,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:50,270 INFO L124 PetriNetUnfolderBase]: 3331/4946 cut-off events. [2024-06-27 18:56:50,270 INFO L125 PetriNetUnfolderBase]: For 10708/10715 co-relation queries the response was YES. [2024-06-27 18:56:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16660 conditions, 4946 events. 3331/4946 cut-off events. For 10708/10715 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26508 event pairs, 1017 based on Foata normal form. 8/4947 useless extension candidates. Maximal degree in co-relation 16630. Up to 4630 conditions per place. [2024-06-27 18:56:50,301 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2024-06-27 18:56:50,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 125 transitions, 911 flow [2024-06-27 18:56:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:56:50,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-27 18:56:50,303 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 501 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:56:50,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 125 transitions, 911 flow [2024-06-27 18:56:50,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 903 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:50,317 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 641 flow [2024-06-27 18:56:50,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=641, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-27 18:56:50,318 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-27 18:56:50,319 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 641 flow [2024-06-27 18:56:50,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:50,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:50,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:50,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:56:50,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:50,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1027630010, now seen corresponding path program 1 times [2024-06-27 18:56:50,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:50,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780590620] [2024-06-27 18:56:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:50,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:52,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:52,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780590620] [2024-06-27 18:56:52,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780590620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:52,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:52,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:52,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950547495] [2024-06-27 18:56:52,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:52,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:52,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:52,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:52,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 641 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:52,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:52,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:52,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:54,147 INFO L124 PetriNetUnfolderBase]: 3615/5636 cut-off events. [2024-06-27 18:56:54,147 INFO L125 PetriNetUnfolderBase]: For 14014/14020 co-relation queries the response was YES. [2024-06-27 18:56:54,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19492 conditions, 5636 events. 3615/5636 cut-off events. For 14014/14020 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 32508 event pairs, 1223 based on Foata normal form. 9/5643 useless extension candidates. Maximal degree in co-relation 19457. Up to 4926 conditions per place. [2024-06-27 18:56:54,238 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 156 selfloop transitions, 37 changer transitions 0/200 dead transitions. [2024-06-27 18:56:54,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 200 transitions, 1569 flow [2024-06-27 18:56:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:56:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:56:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:56:54,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2024-06-27 18:56:54,240 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 641 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:56:54,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 200 transitions, 1569 flow [2024-06-27 18:56:54,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 200 transitions, 1559 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:54,258 INFO L231 Difference]: Finished difference. Result has 93 places, 121 transitions, 1065 flow [2024-06-27 18:56:54,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1065, PETRI_PLACES=93, PETRI_TRANSITIONS=121} [2024-06-27 18:56:54,258 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 42 predicate places. [2024-06-27 18:56:54,259 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 121 transitions, 1065 flow [2024-06-27 18:56:54,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:54,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:54,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:54,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:56:54,259 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:54,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:54,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1623313292, now seen corresponding path program 2 times [2024-06-27 18:56:54,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:54,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806880021] [2024-06-27 18:56:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:54,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:56,608 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 18:56:56,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:56,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806880021] [2024-06-27 18:56:56,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806880021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:56,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:56,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:56,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540547415] [2024-06-27 18:56:56,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:56,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:56,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:56,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:56,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:56,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:56,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 121 transitions, 1065 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:56,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:56,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:56,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:58,287 INFO L124 PetriNetUnfolderBase]: 3731/5822 cut-off events. [2024-06-27 18:56:58,288 INFO L125 PetriNetUnfolderBase]: For 21231/21239 co-relation queries the response was YES. [2024-06-27 18:56:58,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22994 conditions, 5822 events. 3731/5822 cut-off events. For 21231/21239 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 33697 event pairs, 1149 based on Foata normal form. 11/5831 useless extension candidates. Maximal degree in co-relation 22952. Up to 4947 conditions per place. [2024-06-27 18:56:58,328 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 136 selfloop transitions, 58 changer transitions 0/201 dead transitions. [2024-06-27 18:56:58,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 201 transitions, 1808 flow [2024-06-27 18:56:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:56:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:56:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:56:58,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-27 18:56:58,330 INFO L175 Difference]: Start difference. First operand has 93 places, 121 transitions, 1065 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:56:58,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 201 transitions, 1808 flow [2024-06-27 18:56:58,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 201 transitions, 1774 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:58,357 INFO L231 Difference]: Finished difference. Result has 101 places, 129 transitions, 1255 flow [2024-06-27 18:56:58,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1255, PETRI_PLACES=101, PETRI_TRANSITIONS=129} [2024-06-27 18:56:58,357 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 50 predicate places. [2024-06-27 18:56:58,358 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 129 transitions, 1255 flow [2024-06-27 18:56:58,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:58,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:58,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:58,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:56:58,358 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:58,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:58,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1373694090, now seen corresponding path program 3 times [2024-06-27 18:56:58,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:58,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254715630] [2024-06-27 18:56:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:58,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:00,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:00,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254715630] [2024-06-27 18:57:00,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254715630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:00,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:00,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:00,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928591588] [2024-06-27 18:57:00,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:00,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:00,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:00,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:00,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 129 transitions, 1255 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:00,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:00,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:00,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:02,449 INFO L124 PetriNetUnfolderBase]: 3762/5777 cut-off events. [2024-06-27 18:57:02,450 INFO L125 PetriNetUnfolderBase]: For 29275/29277 co-relation queries the response was YES. [2024-06-27 18:57:02,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25242 conditions, 5777 events. 3762/5777 cut-off events. For 29275/29277 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32527 event pairs, 1138 based on Foata normal form. 2/5773 useless extension candidates. Maximal degree in co-relation 25196. Up to 4920 conditions per place. [2024-06-27 18:57:02,492 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 149 selfloop transitions, 51 changer transitions 0/207 dead transitions. [2024-06-27 18:57:02,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 207 transitions, 2121 flow [2024-06-27 18:57:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:57:02,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5592705167173252 [2024-06-27 18:57:02,495 INFO L175 Difference]: Start difference. First operand has 101 places, 129 transitions, 1255 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:57:02,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 207 transitions, 2121 flow [2024-06-27 18:57:02,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 207 transitions, 2016 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:02,534 INFO L231 Difference]: Finished difference. Result has 106 places, 151 transitions, 1590 flow [2024-06-27 18:57:02,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1590, PETRI_PLACES=106, PETRI_TRANSITIONS=151} [2024-06-27 18:57:02,536 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 55 predicate places. [2024-06-27 18:57:02,536 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 151 transitions, 1590 flow [2024-06-27 18:57:02,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:02,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:02,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:02,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:57:02,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:02,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:02,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1373694276, now seen corresponding path program 1 times [2024-06-27 18:57:02,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:02,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953967738] [2024-06-27 18:57:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:02,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:04,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:04,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953967738] [2024-06-27 18:57:04,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953967738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:04,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:04,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:04,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676353935] [2024-06-27 18:57:04,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:04,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:04,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:04,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:04,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:04,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:04,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 151 transitions, 1590 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:04,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:04,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:04,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:06,125 INFO L124 PetriNetUnfolderBase]: 3793/5861 cut-off events. [2024-06-27 18:57:06,125 INFO L125 PetriNetUnfolderBase]: For 34130/34138 co-relation queries the response was YES. [2024-06-27 18:57:06,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26991 conditions, 5861 events. 3793/5861 cut-off events. For 34130/34138 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33345 event pairs, 1169 based on Foata normal form. 10/5866 useless extension candidates. Maximal degree in co-relation 26941. Up to 5232 conditions per place. [2024-06-27 18:57:06,175 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 163 selfloop transitions, 30 changer transitions 0/200 dead transitions. [2024-06-27 18:57:06,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 200 transitions, 2204 flow [2024-06-27 18:57:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 18:57:06,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-27 18:57:06,184 INFO L175 Difference]: Start difference. First operand has 106 places, 151 transitions, 1590 flow. Second operand 6 states and 157 transitions. [2024-06-27 18:57:06,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 200 transitions, 2204 flow [2024-06-27 18:57:06,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 200 transitions, 2153 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 18:57:06,221 INFO L231 Difference]: Finished difference. Result has 110 places, 154 transitions, 1642 flow [2024-06-27 18:57:06,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1642, PETRI_PLACES=110, PETRI_TRANSITIONS=154} [2024-06-27 18:57:06,222 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 59 predicate places. [2024-06-27 18:57:06,222 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 154 transitions, 1642 flow [2024-06-27 18:57:06,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:06,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:06,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:06,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:57:06,223 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:06,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:06,223 INFO L85 PathProgramCache]: Analyzing trace with hash -864321368, now seen corresponding path program 4 times [2024-06-27 18:57:06,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:06,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273053117] [2024-06-27 18:57:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:06,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:08,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:08,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273053117] [2024-06-27 18:57:08,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273053117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:08,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:08,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:08,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51257375] [2024-06-27 18:57:08,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:08,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:08,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:08,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:08,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:08,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:08,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 154 transitions, 1642 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:08,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:08,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:08,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:09,906 INFO L124 PetriNetUnfolderBase]: 3788/5774 cut-off events. [2024-06-27 18:57:09,906 INFO L125 PetriNetUnfolderBase]: For 34087/34095 co-relation queries the response was YES. [2024-06-27 18:57:09,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26708 conditions, 5774 events. 3788/5774 cut-off events. For 34087/34095 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 32055 event pairs, 1168 based on Foata normal form. 4/5762 useless extension candidates. Maximal degree in co-relation 26656. Up to 4937 conditions per place. [2024-06-27 18:57:09,947 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 146 selfloop transitions, 57 changer transitions 0/210 dead transitions. [2024-06-27 18:57:09,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 210 transitions, 2306 flow [2024-06-27 18:57:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 18:57:09,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 18:57:09,949 INFO L175 Difference]: Start difference. First operand has 110 places, 154 transitions, 1642 flow. Second operand 7 states and 179 transitions. [2024-06-27 18:57:09,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 210 transitions, 2306 flow [2024-06-27 18:57:09,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 210 transitions, 2267 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:10,000 INFO L231 Difference]: Finished difference. Result has 114 places, 157 transitions, 1765 flow [2024-06-27 18:57:10,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1765, PETRI_PLACES=114, PETRI_TRANSITIONS=157} [2024-06-27 18:57:10,002 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 63 predicate places. [2024-06-27 18:57:10,003 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 157 transitions, 1765 flow [2024-06-27 18:57:10,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:10,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:10,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:10,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:57:10,016 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:10,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:10,017 INFO L85 PathProgramCache]: Analyzing trace with hash -830122292, now seen corresponding path program 2 times [2024-06-27 18:57:10,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:10,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908976570] [2024-06-27 18:57:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:10,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:11,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908976570] [2024-06-27 18:57:11,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908976570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:11,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:11,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:11,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476608652] [2024-06-27 18:57:11,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:11,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:11,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:11,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:11,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 157 transitions, 1765 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:11,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:11,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:11,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:13,212 INFO L124 PetriNetUnfolderBase]: 3783/5859 cut-off events. [2024-06-27 18:57:13,213 INFO L125 PetriNetUnfolderBase]: For 39290/39331 co-relation queries the response was YES. [2024-06-27 18:57:13,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27521 conditions, 5859 events. 3783/5859 cut-off events. For 39290/39331 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33504 event pairs, 1186 based on Foata normal form. 34/5886 useless extension candidates. Maximal degree in co-relation 27468. Up to 5220 conditions per place. [2024-06-27 18:57:13,252 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 165 selfloop transitions, 29 changer transitions 0/201 dead transitions. [2024-06-27 18:57:13,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 201 transitions, 2330 flow [2024-06-27 18:57:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 18:57:13,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:57:13,259 INFO L175 Difference]: Start difference. First operand has 114 places, 157 transitions, 1765 flow. Second operand 6 states and 150 transitions. [2024-06-27 18:57:13,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 201 transitions, 2330 flow [2024-06-27 18:57:13,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 201 transitions, 2235 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:13,296 INFO L231 Difference]: Finished difference. Result has 116 places, 159 transitions, 1766 flow [2024-06-27 18:57:13,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1766, PETRI_PLACES=116, PETRI_TRANSITIONS=159} [2024-06-27 18:57:13,297 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 65 predicate places. [2024-06-27 18:57:13,297 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 159 transitions, 1766 flow [2024-06-27 18:57:13,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:13,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:13,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:13,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:57:13,298 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:13,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:13,298 INFO L85 PathProgramCache]: Analyzing trace with hash -864075104, now seen corresponding path program 1 times [2024-06-27 18:57:13,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:13,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025148080] [2024-06-27 18:57:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:13,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:14,736 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 18:57:14,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:14,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025148080] [2024-06-27 18:57:14,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025148080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:14,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:14,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:14,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932341415] [2024-06-27 18:57:14,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:14,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:14,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:14,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:14,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 159 transitions, 1766 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:14,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:14,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:14,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:16,147 INFO L124 PetriNetUnfolderBase]: 3775/5884 cut-off events. [2024-06-27 18:57:16,148 INFO L125 PetriNetUnfolderBase]: For 40922/40930 co-relation queries the response was YES. [2024-06-27 18:57:16,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27299 conditions, 5884 events. 3775/5884 cut-off events. For 40922/40930 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33782 event pairs, 1256 based on Foata normal form. 8/5889 useless extension candidates. Maximal degree in co-relation 27244. Up to 5340 conditions per place. [2024-06-27 18:57:16,180 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 171 selfloop transitions, 17 changer transitions 0/195 dead transitions. [2024-06-27 18:57:16,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 195 transitions, 2275 flow [2024-06-27 18:57:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:57:16,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 18:57:16,182 INFO L175 Difference]: Start difference. First operand has 116 places, 159 transitions, 1766 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:57:16,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 195 transitions, 2275 flow [2024-06-27 18:57:16,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 195 transitions, 2230 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:16,223 INFO L231 Difference]: Finished difference. Result has 119 places, 162 transitions, 1799 flow [2024-06-27 18:57:16,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1799, PETRI_PLACES=119, PETRI_TRANSITIONS=162} [2024-06-27 18:57:16,224 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 68 predicate places. [2024-06-27 18:57:16,224 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 162 transitions, 1799 flow [2024-06-27 18:57:16,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:16,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:16,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:16,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:57:16,224 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:16,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:16,225 INFO L85 PathProgramCache]: Analyzing trace with hash -365299357, now seen corresponding path program 1 times [2024-06-27 18:57:16,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:16,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495174147] [2024-06-27 18:57:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:16,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:18,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:18,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495174147] [2024-06-27 18:57:18,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495174147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:18,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:18,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:18,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780297050] [2024-06-27 18:57:18,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:18,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:18,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:18,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:18,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:18,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:18,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 162 transitions, 1799 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:18,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:18,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:18,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:20,211 INFO L124 PetriNetUnfolderBase]: 3759/5863 cut-off events. [2024-06-27 18:57:20,212 INFO L125 PetriNetUnfolderBase]: For 43205/43213 co-relation queries the response was YES. [2024-06-27 18:57:20,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27618 conditions, 5863 events. 3759/5863 cut-off events. For 43205/43213 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 33668 event pairs, 1238 based on Foata normal form. 14/5875 useless extension candidates. Maximal degree in co-relation 27562. Up to 4991 conditions per place. [2024-06-27 18:57:20,253 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 149 selfloop transitions, 74 changer transitions 0/230 dead transitions. [2024-06-27 18:57:20,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 230 transitions, 2488 flow [2024-06-27 18:57:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:57:20,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-27 18:57:20,255 INFO L175 Difference]: Start difference. First operand has 119 places, 162 transitions, 1799 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:57:20,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 230 transitions, 2488 flow [2024-06-27 18:57:20,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 230 transitions, 2420 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:20,298 INFO L231 Difference]: Finished difference. Result has 123 places, 162 transitions, 1899 flow [2024-06-27 18:57:20,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1899, PETRI_PLACES=123, PETRI_TRANSITIONS=162} [2024-06-27 18:57:20,298 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 72 predicate places. [2024-06-27 18:57:20,298 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 162 transitions, 1899 flow [2024-06-27 18:57:20,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:20,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:20,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:20,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:57:20,299 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:20,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:20,299 INFO L85 PathProgramCache]: Analyzing trace with hash -365155207, now seen corresponding path program 2 times [2024-06-27 18:57:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:20,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3540904] [2024-06-27 18:57:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:20,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:22,789 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 18:57:22,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:22,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3540904] [2024-06-27 18:57:22,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3540904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:22,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:22,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:22,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479289228] [2024-06-27 18:57:22,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:22,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:22,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:22,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:22,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:22,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:22,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 162 transitions, 1899 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:22,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:22,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:22,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:24,670 INFO L124 PetriNetUnfolderBase]: 3790/5827 cut-off events. [2024-06-27 18:57:24,670 INFO L125 PetriNetUnfolderBase]: For 46971/46973 co-relation queries the response was YES. [2024-06-27 18:57:24,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28256 conditions, 5827 events. 3790/5827 cut-off events. For 46971/46973 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 32844 event pairs, 1129 based on Foata normal form. 2/5823 useless extension candidates. Maximal degree in co-relation 28199. Up to 4936 conditions per place. [2024-06-27 18:57:24,712 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 164 selfloop transitions, 60 changer transitions 0/231 dead transitions. [2024-06-27 18:57:24,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 231 transitions, 2665 flow [2024-06-27 18:57:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:57:24,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-27 18:57:24,714 INFO L175 Difference]: Start difference. First operand has 123 places, 162 transitions, 1899 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:57:24,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 231 transitions, 2665 flow [2024-06-27 18:57:24,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 231 transitions, 2501 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 18:57:24,753 INFO L231 Difference]: Finished difference. Result has 124 places, 165 transitions, 1903 flow [2024-06-27 18:57:24,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1903, PETRI_PLACES=124, PETRI_TRANSITIONS=165} [2024-06-27 18:57:24,754 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 73 predicate places. [2024-06-27 18:57:24,754 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 165 transitions, 1903 flow [2024-06-27 18:57:24,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:24,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:24,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:24,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:57:24,755 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:24,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash -365149627, now seen corresponding path program 3 times [2024-06-27 18:57:24,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:24,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132637527] [2024-06-27 18:57:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:24,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:27,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:27,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132637527] [2024-06-27 18:57:27,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132637527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:27,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:27,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:27,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857823363] [2024-06-27 18:57:27,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:27,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:27,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:27,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:27,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:27,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 165 transitions, 1903 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:27,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:27,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:27,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:28,783 INFO L124 PetriNetUnfolderBase]: 3857/5933 cut-off events. [2024-06-27 18:57:28,783 INFO L125 PetriNetUnfolderBase]: For 46425/46427 co-relation queries the response was YES. [2024-06-27 18:57:28,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28512 conditions, 5933 events. 3857/5933 cut-off events. For 46425/46427 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 33605 event pairs, 1108 based on Foata normal form. 2/5930 useless extension candidates. Maximal degree in co-relation 28454. Up to 5005 conditions per place. [2024-06-27 18:57:28,833 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 160 selfloop transitions, 61 changer transitions 0/228 dead transitions. [2024-06-27 18:57:28,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 228 transitions, 2733 flow [2024-06-27 18:57:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 18:57:28,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653495440729484 [2024-06-27 18:57:28,835 INFO L175 Difference]: Start difference. First operand has 124 places, 165 transitions, 1903 flow. Second operand 7 states and 186 transitions. [2024-06-27 18:57:28,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 228 transitions, 2733 flow [2024-06-27 18:57:28,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 228 transitions, 2587 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:28,885 INFO L231 Difference]: Finished difference. Result has 125 places, 171 transitions, 1967 flow [2024-06-27 18:57:28,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1967, PETRI_PLACES=125, PETRI_TRANSITIONS=171} [2024-06-27 18:57:28,886 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 74 predicate places. [2024-06-27 18:57:28,886 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 171 transitions, 1967 flow [2024-06-27 18:57:28,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:28,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:28,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:28,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:57:28,887 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:28,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:28,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1016800439, now seen corresponding path program 4 times [2024-06-27 18:57:28,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:28,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066693808] [2024-06-27 18:57:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:28,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:31,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:31,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066693808] [2024-06-27 18:57:31,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066693808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:31,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:31,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:31,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185035951] [2024-06-27 18:57:31,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:31,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:31,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:31,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:31,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:31,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:31,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 171 transitions, 1967 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:31,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:31,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:31,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:32,779 INFO L124 PetriNetUnfolderBase]: 3852/5925 cut-off events. [2024-06-27 18:57:32,779 INFO L125 PetriNetUnfolderBase]: For 49267/49304 co-relation queries the response was YES. [2024-06-27 18:57:32,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28511 conditions, 5925 events. 3852/5925 cut-off events. For 49267/49304 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 33605 event pairs, 1155 based on Foata normal form. 17/5929 useless extension candidates. Maximal degree in co-relation 28452. Up to 5000 conditions per place. [2024-06-27 18:57:32,823 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 159 selfloop transitions, 59 changer transitions 0/225 dead transitions. [2024-06-27 18:57:32,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 225 transitions, 2667 flow [2024-06-27 18:57:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 18:57:32,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 18:57:32,826 INFO L175 Difference]: Start difference. First operand has 125 places, 171 transitions, 1967 flow. Second operand 7 states and 179 transitions. [2024-06-27 18:57:32,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 225 transitions, 2667 flow [2024-06-27 18:57:32,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 225 transitions, 2582 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:32,877 INFO L231 Difference]: Finished difference. Result has 129 places, 172 transitions, 2024 flow [2024-06-27 18:57:32,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2024, PETRI_PLACES=129, PETRI_TRANSITIONS=172} [2024-06-27 18:57:32,878 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 78 predicate places. [2024-06-27 18:57:32,878 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 172 transitions, 2024 flow [2024-06-27 18:57:32,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:32,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:32,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:32,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:57:32,879 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:32,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:32,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1024157669, now seen corresponding path program 5 times [2024-06-27 18:57:32,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:32,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547720399] [2024-06-27 18:57:32,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:32,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:35,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:35,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547720399] [2024-06-27 18:57:35,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547720399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:35,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:35,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:35,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154702908] [2024-06-27 18:57:35,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:35,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:35,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:35,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:35,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:35,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:35,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 172 transitions, 2024 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:35,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:35,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:35,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:37,369 INFO L124 PetriNetUnfolderBase]: 3847/5877 cut-off events. [2024-06-27 18:57:37,369 INFO L125 PetriNetUnfolderBase]: For 52932/52940 co-relation queries the response was YES. [2024-06-27 18:57:37,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28566 conditions, 5877 events. 3847/5877 cut-off events. For 52932/52940 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 32725 event pairs, 1174 based on Foata normal form. 4/5863 useless extension candidates. Maximal degree in co-relation 28506. Up to 4995 conditions per place. [2024-06-27 18:57:37,415 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 158 selfloop transitions, 69 changer transitions 0/234 dead transitions. [2024-06-27 18:57:37,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 234 transitions, 2696 flow [2024-06-27 18:57:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:57:37,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-27 18:57:37,424 INFO L175 Difference]: Start difference. First operand has 129 places, 172 transitions, 2024 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:57:37,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 234 transitions, 2696 flow [2024-06-27 18:57:37,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 234 transitions, 2595 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:37,477 INFO L231 Difference]: Finished difference. Result has 133 places, 172 transitions, 2069 flow [2024-06-27 18:57:37,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1923, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2069, PETRI_PLACES=133, PETRI_TRANSITIONS=172} [2024-06-27 18:57:37,477 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 82 predicate places. [2024-06-27 18:57:37,478 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 172 transitions, 2069 flow [2024-06-27 18:57:37,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:37,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:37,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:37,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:57:37,478 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:37,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:37,479 INFO L85 PathProgramCache]: Analyzing trace with hash 432669605, now seen corresponding path program 1 times [2024-06-27 18:57:37,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:37,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389437063] [2024-06-27 18:57:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:37,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:40,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:40,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389437063] [2024-06-27 18:57:40,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389437063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:40,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:40,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:40,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358129874] [2024-06-27 18:57:40,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:40,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:40,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:40,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:40,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:40,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:40,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 172 transitions, 2069 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:40,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:40,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:40,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:42,269 INFO L124 PetriNetUnfolderBase]: 4432/6941 cut-off events. [2024-06-27 18:57:42,269 INFO L125 PetriNetUnfolderBase]: For 65268/65276 co-relation queries the response was YES. [2024-06-27 18:57:42,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33361 conditions, 6941 events. 4432/6941 cut-off events. For 65268/65276 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 41302 event pairs, 971 based on Foata normal form. 14/6953 useless extension candidates. Maximal degree in co-relation 33299. Up to 5083 conditions per place. [2024-06-27 18:57:42,322 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 181 selfloop transitions, 77 changer transitions 0/265 dead transitions. [2024-06-27 18:57:42,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 265 transitions, 3038 flow [2024-06-27 18:57:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:57:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:57:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-27 18:57:42,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-06-27 18:57:42,324 INFO L175 Difference]: Start difference. First operand has 133 places, 172 transitions, 2069 flow. Second operand 9 states and 243 transitions. [2024-06-27 18:57:42,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 265 transitions, 3038 flow [2024-06-27 18:57:42,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 265 transitions, 2890 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:42,402 INFO L231 Difference]: Finished difference. Result has 137 places, 179 transitions, 2192 flow [2024-06-27 18:57:42,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2192, PETRI_PLACES=137, PETRI_TRANSITIONS=179} [2024-06-27 18:57:42,403 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 86 predicate places. [2024-06-27 18:57:42,403 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 179 transitions, 2192 flow [2024-06-27 18:57:42,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:42,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:42,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:42,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:57:42,403 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:42,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:42,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1041793571, now seen corresponding path program 2 times [2024-06-27 18:57:42,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:42,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311573610] [2024-06-27 18:57:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:42,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:45,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:45,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311573610] [2024-06-27 18:57:45,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311573610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:45,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:45,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:45,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455368494] [2024-06-27 18:57:45,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:45,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:45,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:45,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:45,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:45,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:45,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 179 transitions, 2192 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:45,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:45,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:45,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:47,086 INFO L124 PetriNetUnfolderBase]: 4419/6924 cut-off events. [2024-06-27 18:57:47,086 INFO L125 PetriNetUnfolderBase]: For 71403/71411 co-relation queries the response was YES. [2024-06-27 18:57:47,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34398 conditions, 6924 events. 4419/6924 cut-off events. For 71403/71411 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 41241 event pairs, 1281 based on Foata normal form. 14/6936 useless extension candidates. Maximal degree in co-relation 34334. Up to 5869 conditions per place. [2024-06-27 18:57:47,140 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 177 selfloop transitions, 77 changer transitions 0/261 dead transitions. [2024-06-27 18:57:47,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 261 transitions, 3013 flow [2024-06-27 18:57:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:57:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:57:47,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:57:47,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2024-06-27 18:57:47,142 INFO L175 Difference]: Start difference. First operand has 137 places, 179 transitions, 2192 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:57:47,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 261 transitions, 3013 flow [2024-06-27 18:57:47,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 261 transitions, 2894 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 18:57:47,241 INFO L231 Difference]: Finished difference. Result has 141 places, 182 transitions, 2290 flow [2024-06-27 18:57:47,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2290, PETRI_PLACES=141, PETRI_TRANSITIONS=182} [2024-06-27 18:57:47,242 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 90 predicate places. [2024-06-27 18:57:47,242 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 182 transitions, 2290 flow [2024-06-27 18:57:47,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:47,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:47,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:47,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:57:47,243 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:47,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:47,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1046262221, now seen corresponding path program 3 times [2024-06-27 18:57:47,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:47,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056542229] [2024-06-27 18:57:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:47,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:49,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:49,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056542229] [2024-06-27 18:57:49,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056542229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:49,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:49,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:49,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325026823] [2024-06-27 18:57:49,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:49,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:49,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:49,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:49,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:49,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:49,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 182 transitions, 2290 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:49,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:49,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:49,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:51,695 INFO L124 PetriNetUnfolderBase]: 4469/6895 cut-off events. [2024-06-27 18:57:51,695 INFO L125 PetriNetUnfolderBase]: For 78438/78440 co-relation queries the response was YES. [2024-06-27 18:57:51,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35452 conditions, 6895 events. 4469/6895 cut-off events. For 78438/78440 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 40234 event pairs, 1151 based on Foata normal form. 4/6893 useless extension candidates. Maximal degree in co-relation 35386. Up to 5875 conditions per place. [2024-06-27 18:57:51,745 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 173 selfloop transitions, 69 changer transitions 0/249 dead transitions. [2024-06-27 18:57:51,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 249 transitions, 3028 flow [2024-06-27 18:57:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:57:51,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 18:57:51,747 INFO L175 Difference]: Start difference. First operand has 141 places, 182 transitions, 2290 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:57:51,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 249 transitions, 3028 flow [2024-06-27 18:57:51,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 249 transitions, 2855 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 18:57:51,831 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 2300 flow [2024-06-27 18:57:51,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2300, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-06-27 18:57:51,831 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 91 predicate places. [2024-06-27 18:57:51,831 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 2300 flow [2024-06-27 18:57:51,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:51,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:51,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:51,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:57:51,832 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:51,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1046446919, now seen corresponding path program 1 times [2024-06-27 18:57:51,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:51,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323998524] [2024-06-27 18:57:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:54,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:54,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323998524] [2024-06-27 18:57:54,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323998524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:54,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:54,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:54,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897759795] [2024-06-27 18:57:54,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:54,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:54,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:54,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:54,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 2300 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:54,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:54,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:54,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:56,002 INFO L124 PetriNetUnfolderBase]: 4519/7013 cut-off events. [2024-06-27 18:57:56,002 INFO L125 PetriNetUnfolderBase]: For 84048/84056 co-relation queries the response was YES. [2024-06-27 18:57:56,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36122 conditions, 7013 events. 4519/7013 cut-off events. For 84048/84056 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 41436 event pairs, 1161 based on Foata normal form. 12/7020 useless extension candidates. Maximal degree in co-relation 36055. Up to 6262 conditions per place. [2024-06-27 18:57:56,059 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 201 selfloop transitions, 34 changer transitions 0/242 dead transitions. [2024-06-27 18:57:56,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 242 transitions, 2988 flow [2024-06-27 18:57:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:57:56,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-27 18:57:56,071 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 2300 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:57:56,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 242 transitions, 2988 flow [2024-06-27 18:57:56,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 242 transitions, 2827 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:56,185 INFO L231 Difference]: Finished difference. Result has 143 places, 186 transitions, 2242 flow [2024-06-27 18:57:56,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2242, PETRI_PLACES=143, PETRI_TRANSITIONS=186} [2024-06-27 18:57:56,185 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2024-06-27 18:57:56,185 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 186 transitions, 2242 flow [2024-06-27 18:57:56,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:56,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:56,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:56,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:57:56,186 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:56,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1687688509, now seen corresponding path program 4 times [2024-06-27 18:57:56,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:56,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877492873] [2024-06-27 18:57:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:56,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:58,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:58,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877492873] [2024-06-27 18:57:58,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877492873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:58,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:58,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:58,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961980305] [2024-06-27 18:57:58,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:58,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:58,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:58,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:58,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:58,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:58,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 186 transitions, 2242 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:58,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:58,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:58,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:00,578 INFO L124 PetriNetUnfolderBase]: 4511/6895 cut-off events. [2024-06-27 18:58:00,579 INFO L125 PetriNetUnfolderBase]: For 87367/87375 co-relation queries the response was YES. [2024-06-27 18:58:00,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35797 conditions, 6895 events. 4511/6895 cut-off events. For 87367/87375 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 39640 event pairs, 1193 based on Foata normal form. 6/6881 useless extension candidates. Maximal degree in co-relation 35729. Up to 5937 conditions per place. [2024-06-27 18:58:00,635 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 173 selfloop transitions, 71 changer transitions 0/251 dead transitions. [2024-06-27 18:58:00,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 251 transitions, 2990 flow [2024-06-27 18:58:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:58:00,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-27 18:58:00,638 INFO L175 Difference]: Start difference. First operand has 143 places, 186 transitions, 2242 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:58:00,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 251 transitions, 2990 flow [2024-06-27 18:58:00,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 251 transitions, 2909 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:00,764 INFO L231 Difference]: Finished difference. Result has 146 places, 188 transitions, 2354 flow [2024-06-27 18:58:00,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2161, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2354, PETRI_PLACES=146, PETRI_TRANSITIONS=188} [2024-06-27 18:58:00,765 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 95 predicate places. [2024-06-27 18:58:00,766 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 188 transitions, 2354 flow [2024-06-27 18:58:00,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:00,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:00,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:00,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:58:00,766 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:00,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1116426283, now seen corresponding path program 2 times [2024-06-27 18:58:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:00,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017111294] [2024-06-27 18:58:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:00,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:03,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:03,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017111294] [2024-06-27 18:58:03,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017111294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:03,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:03,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:58:03,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041375836] [2024-06-27 18:58:03,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:03,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:58:03,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:03,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:58:03,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:58:03,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:03,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 188 transitions, 2354 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:03,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:03,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:03,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:04,744 INFO L124 PetriNetUnfolderBase]: 4561/7089 cut-off events. [2024-06-27 18:58:04,745 INFO L125 PetriNetUnfolderBase]: For 95876/95917 co-relation queries the response was YES. [2024-06-27 18:58:04,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37085 conditions, 7089 events. 4561/7089 cut-off events. For 95876/95917 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 41989 event pairs, 1196 based on Foata normal form. 36/7118 useless extension candidates. Maximal degree in co-relation 37016. Up to 6324 conditions per place. [2024-06-27 18:58:04,799 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 206 selfloop transitions, 31 changer transitions 0/244 dead transitions. [2024-06-27 18:58:04,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 244 transitions, 3052 flow [2024-06-27 18:58:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:04,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:04,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:58:04,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:58:04,802 INFO L175 Difference]: Start difference. First operand has 146 places, 188 transitions, 2354 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:58:04,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 244 transitions, 3052 flow [2024-06-27 18:58:04,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 244 transitions, 2881 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 18:58:04,957 INFO L231 Difference]: Finished difference. Result has 147 places, 190 transitions, 2286 flow [2024-06-27 18:58:04,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2286, PETRI_PLACES=147, PETRI_TRANSITIONS=190} [2024-06-27 18:58:04,957 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 96 predicate places. [2024-06-27 18:58:04,957 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 190 transitions, 2286 flow [2024-06-27 18:58:04,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:04,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:04,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:04,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:58:04,962 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:04,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1447463905, now seen corresponding path program 3 times [2024-06-27 18:58:04,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:04,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143331141] [2024-06-27 18:58:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:04,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:06,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:06,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143331141] [2024-06-27 18:58:06,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143331141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:06,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:06,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:58:06,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507453961] [2024-06-27 18:58:06,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:06,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:58:06,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:58:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:58:06,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:06,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 190 transitions, 2286 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:06,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:06,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:06,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:08,685 INFO L124 PetriNetUnfolderBase]: 4553/7077 cut-off events. [2024-06-27 18:58:08,685 INFO L125 PetriNetUnfolderBase]: For 97018/97059 co-relation queries the response was YES. [2024-06-27 18:58:08,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36760 conditions, 7077 events. 4553/7077 cut-off events. For 97018/97059 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 41951 event pairs, 1092 based on Foata normal form. 36/7106 useless extension candidates. Maximal degree in co-relation 36690. Up to 6162 conditions per place. [2024-06-27 18:58:08,738 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 205 selfloop transitions, 37 changer transitions 0/249 dead transitions. [2024-06-27 18:58:08,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 249 transitions, 3036 flow [2024-06-27 18:58:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:58:08,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-27 18:58:08,740 INFO L175 Difference]: Start difference. First operand has 147 places, 190 transitions, 2286 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:58:08,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 249 transitions, 3036 flow [2024-06-27 18:58:08,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 249 transitions, 2955 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:08,866 INFO L231 Difference]: Finished difference. Result has 150 places, 194 transitions, 2375 flow [2024-06-27 18:58:08,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2375, PETRI_PLACES=150, PETRI_TRANSITIONS=194} [2024-06-27 18:58:08,867 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 99 predicate places. [2024-06-27 18:58:08,867 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 194 transitions, 2375 flow [2024-06-27 18:58:08,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:08,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:08,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:08,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:58:08,868 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:08,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:08,868 INFO L85 PathProgramCache]: Analyzing trace with hash -720356569, now seen corresponding path program 1 times [2024-06-27 18:58:08,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:08,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962939093] [2024-06-27 18:58:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:08,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:10,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962939093] [2024-06-27 18:58:10,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962939093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:10,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:10,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:58:10,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000961358] [2024-06-27 18:58:10,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:10,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:58:10,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:58:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:58:10,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:58:10,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 194 transitions, 2375 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:10,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:10,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:58:10,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:11,640 INFO L124 PetriNetUnfolderBase]: 4258/6801 cut-off events. [2024-06-27 18:58:11,640 INFO L125 PetriNetUnfolderBase]: For 99238/99282 co-relation queries the response was YES. [2024-06-27 18:58:11,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35403 conditions, 6801 events. 4258/6801 cut-off events. For 99238/99282 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 41953 event pairs, 1351 based on Foata normal form. 42/6834 useless extension candidates. Maximal degree in co-relation 35331. Up to 6074 conditions per place. [2024-06-27 18:58:11,702 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 179 selfloop transitions, 18 changer transitions 0/216 dead transitions. [2024-06-27 18:58:11,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 216 transitions, 2853 flow [2024-06-27 18:58:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:58:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:58:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 18:58:11,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-27 18:58:11,703 INFO L175 Difference]: Start difference. First operand has 150 places, 194 transitions, 2375 flow. Second operand 5 states and 121 transitions. [2024-06-27 18:58:11,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 216 transitions, 2853 flow [2024-06-27 18:58:11,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 216 transitions, 2777 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 18:58:11,859 INFO L231 Difference]: Finished difference. Result has 152 places, 198 transitions, 2383 flow [2024-06-27 18:58:11,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2383, PETRI_PLACES=152, PETRI_TRANSITIONS=198} [2024-06-27 18:58:11,862 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 101 predicate places. [2024-06-27 18:58:11,862 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 198 transitions, 2383 flow [2024-06-27 18:58:11,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:11,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:11,863 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 18:58:11,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:58:11,863 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:11,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1285666468, now seen corresponding path program 1 times [2024-06-27 18:58:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:11,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392570632] [2024-06-27 18:58:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:11,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:14,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:14,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392570632] [2024-06-27 18:58:14,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392570632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:14,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:14,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:14,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241884909] [2024-06-27 18:58:14,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:14,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:14,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:14,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:14,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:14,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:14,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 198 transitions, 2383 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:14,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:14,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:14,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:16,390 INFO L124 PetriNetUnfolderBase]: 4771/7488 cut-off events. [2024-06-27 18:58:16,391 INFO L125 PetriNetUnfolderBase]: For 112120/112128 co-relation queries the response was YES. [2024-06-27 18:58:16,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39887 conditions, 7488 events. 4771/7488 cut-off events. For 112120/112128 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 45143 event pairs, 990 based on Foata normal form. 26/7512 useless extension candidates. Maximal degree in co-relation 39813. Up to 5365 conditions per place. [2024-06-27 18:58:16,448 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 199 selfloop transitions, 81 changer transitions 0/287 dead transitions. [2024-06-27 18:58:16,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 287 transitions, 3392 flow [2024-06-27 18:58:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:16,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 18:58:16,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768321513002365 [2024-06-27 18:58:16,450 INFO L175 Difference]: Start difference. First operand has 152 places, 198 transitions, 2383 flow. Second operand 9 states and 244 transitions. [2024-06-27 18:58:16,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 287 transitions, 3392 flow [2024-06-27 18:58:16,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 287 transitions, 3338 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 18:58:16,606 INFO L231 Difference]: Finished difference. Result has 158 places, 200 transitions, 2531 flow [2024-06-27 18:58:16,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2531, PETRI_PLACES=158, PETRI_TRANSITIONS=200} [2024-06-27 18:58:16,608 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 107 predicate places. [2024-06-27 18:58:16,608 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 200 transitions, 2531 flow [2024-06-27 18:58:16,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:16,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:16,608 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 18:58:16,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:58:16,609 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:16,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1204519658, now seen corresponding path program 2 times [2024-06-27 18:58:16,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:16,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753376824] [2024-06-27 18:58:16,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:16,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:19,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:19,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753376824] [2024-06-27 18:58:19,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753376824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:19,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:19,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:19,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243685347] [2024-06-27 18:58:19,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:19,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:19,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:19,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:19,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:19,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:19,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 200 transitions, 2531 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:19,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:19,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:19,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:21,451 INFO L124 PetriNetUnfolderBase]: 4725/7400 cut-off events. [2024-06-27 18:58:21,452 INFO L125 PetriNetUnfolderBase]: For 112407/112415 co-relation queries the response was YES. [2024-06-27 18:58:21,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39888 conditions, 7400 events. 4725/7400 cut-off events. For 112407/112415 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 44403 event pairs, 1294 based on Foata normal form. 32/7430 useless extension candidates. Maximal degree in co-relation 39813. Up to 6005 conditions per place. [2024-06-27 18:58:21,611 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 200 selfloop transitions, 76 changer transitions 0/283 dead transitions. [2024-06-27 18:58:21,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 283 transitions, 3401 flow [2024-06-27 18:58:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:58:21,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2024-06-27 18:58:21,613 INFO L175 Difference]: Start difference. First operand has 158 places, 200 transitions, 2531 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:58:21,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 283 transitions, 3401 flow [2024-06-27 18:58:21,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 283 transitions, 3255 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:58:21,763 INFO L231 Difference]: Finished difference. Result has 161 places, 201 transitions, 2574 flow [2024-06-27 18:58:21,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2574, PETRI_PLACES=161, PETRI_TRANSITIONS=201} [2024-06-27 18:58:21,764 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 110 predicate places. [2024-06-27 18:58:21,765 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 201 transitions, 2574 flow [2024-06-27 18:58:21,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:21,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:21,765 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 18:58:21,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:58:21,765 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:21,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:21,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1278552612, now seen corresponding path program 3 times [2024-06-27 18:58:21,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:21,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175829644] [2024-06-27 18:58:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:21,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:24,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:24,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175829644] [2024-06-27 18:58:24,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175829644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:24,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:24,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:24,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160870474] [2024-06-27 18:58:24,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:24,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:24,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:24,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:24,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:24,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:24,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 201 transitions, 2574 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:24,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:24,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:24,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:26,579 INFO L124 PetriNetUnfolderBase]: 4901/7585 cut-off events. [2024-06-27 18:58:26,579 INFO L125 PetriNetUnfolderBase]: For 117908/117910 co-relation queries the response was YES. [2024-06-27 18:58:26,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41308 conditions, 7585 events. 4901/7585 cut-off events. For 117908/117910 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45285 event pairs, 1185 based on Foata normal form. 16/7596 useless extension candidates. Maximal degree in co-relation 41232. Up to 6351 conditions per place. [2024-06-27 18:58:26,639 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 200 selfloop transitions, 63 changer transitions 0/270 dead transitions. [2024-06-27 18:58:26,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 270 transitions, 3374 flow [2024-06-27 18:58:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:58:26,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-27 18:58:26,641 INFO L175 Difference]: Start difference. First operand has 161 places, 201 transitions, 2574 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:58:26,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 270 transitions, 3374 flow [2024-06-27 18:58:26,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 270 transitions, 3226 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:26,809 INFO L231 Difference]: Finished difference. Result has 162 places, 202 transitions, 2587 flow [2024-06-27 18:58:26,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2587, PETRI_PLACES=162, PETRI_TRANSITIONS=202} [2024-06-27 18:58:26,810 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 111 predicate places. [2024-06-27 18:58:26,810 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 202 transitions, 2587 flow [2024-06-27 18:58:26,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:26,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:26,810 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 18:58:26,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:58:26,811 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:26,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:26,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1273190232, now seen corresponding path program 4 times [2024-06-27 18:58:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:26,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299881846] [2024-06-27 18:58:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:30,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299881846] [2024-06-27 18:58:30,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299881846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:30,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:30,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:30,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396248098] [2024-06-27 18:58:30,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:30,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:30,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:30,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:30,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:30,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:30,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 202 transitions, 2587 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:30,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:30,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:30,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:33,104 INFO L124 PetriNetUnfolderBase]: 5077/7904 cut-off events. [2024-06-27 18:58:33,104 INFO L125 PetriNetUnfolderBase]: For 129072/129074 co-relation queries the response was YES. [2024-06-27 18:58:33,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43116 conditions, 7904 events. 5077/7904 cut-off events. For 129072/129074 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 47838 event pairs, 1272 based on Foata normal form. 16/7914 useless extension candidates. Maximal degree in co-relation 43039. Up to 6623 conditions per place. [2024-06-27 18:58:33,173 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 207 selfloop transitions, 68 changer transitions 0/282 dead transitions. [2024-06-27 18:58:33,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 282 transitions, 3453 flow [2024-06-27 18:58:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:58:33,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:58:33,175 INFO L175 Difference]: Start difference. First operand has 162 places, 202 transitions, 2587 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:58:33,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 282 transitions, 3453 flow [2024-06-27 18:58:33,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 282 transitions, 3316 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:58:33,380 INFO L231 Difference]: Finished difference. Result has 165 places, 203 transitions, 2623 flow [2024-06-27 18:58:33,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2623, PETRI_PLACES=165, PETRI_TRANSITIONS=203} [2024-06-27 18:58:33,381 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2024-06-27 18:58:33,381 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 203 transitions, 2623 flow [2024-06-27 18:58:33,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:33,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:33,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:33,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:58:33,382 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:33,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:33,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1273042362, now seen corresponding path program 5 times [2024-06-27 18:58:33,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:33,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987589936] [2024-06-27 18:58:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:33,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:36,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:36,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987589936] [2024-06-27 18:58:36,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987589936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:36,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:36,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:36,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799350222] [2024-06-27 18:58:36,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:36,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:36,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:36,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:36,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 203 transitions, 2623 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:36,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:36,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:36,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:39,264 INFO L124 PetriNetUnfolderBase]: 5203/8092 cut-off events. [2024-06-27 18:58:39,264 INFO L125 PetriNetUnfolderBase]: For 133901/133903 co-relation queries the response was YES. [2024-06-27 18:58:39,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44213 conditions, 8092 events. 5203/8092 cut-off events. For 133901/133903 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 49220 event pairs, 1239 based on Foata normal form. 12/8098 useless extension candidates. Maximal degree in co-relation 44135. Up to 6601 conditions per place. [2024-06-27 18:58:39,341 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 219 selfloop transitions, 71 changer transitions 0/297 dead transitions. [2024-06-27 18:58:39,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 297 transitions, 3575 flow [2024-06-27 18:58:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:58:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:58:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-27 18:58:39,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553191489361702 [2024-06-27 18:58:39,344 INFO L175 Difference]: Start difference. First operand has 165 places, 203 transitions, 2623 flow. Second operand 10 states and 261 transitions. [2024-06-27 18:58:39,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 297 transitions, 3575 flow [2024-06-27 18:58:39,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 297 transitions, 3426 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:39,677 INFO L231 Difference]: Finished difference. Result has 168 places, 204 transitions, 2654 flow [2024-06-27 18:58:39,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2654, PETRI_PLACES=168, PETRI_TRANSITIONS=204} [2024-06-27 18:58:39,679 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-06-27 18:58:39,679 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 204 transitions, 2654 flow [2024-06-27 18:58:39,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:39,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:39,679 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 18:58:39,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:58:39,679 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:39,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:39,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1278767814, now seen corresponding path program 1 times [2024-06-27 18:58:39,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:39,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148620785] [2024-06-27 18:58:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:39,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:42,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:42,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148620785] [2024-06-27 18:58:42,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148620785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:42,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:42,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:42,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654584810] [2024-06-27 18:58:42,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:42,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:42,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:42,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:42,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:42,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:42,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 204 transitions, 2654 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:42,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:42,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:42,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:44,733 INFO L124 PetriNetUnfolderBase]: 5533/8593 cut-off events. [2024-06-27 18:58:44,733 INFO L125 PetriNetUnfolderBase]: For 155976/155978 co-relation queries the response was YES. [2024-06-27 18:58:44,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47779 conditions, 8593 events. 5533/8593 cut-off events. For 155976/155978 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 52790 event pairs, 1257 based on Foata normal form. 12/8600 useless extension candidates. Maximal degree in co-relation 47700. Up to 6359 conditions per place. [2024-06-27 18:58:44,804 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 204 selfloop transitions, 68 changer transitions 0/279 dead transitions. [2024-06-27 18:58:44,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 279 transitions, 3648 flow [2024-06-27 18:58:44,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 18:58:44,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664893617021277 [2024-06-27 18:58:44,807 INFO L175 Difference]: Start difference. First operand has 168 places, 204 transitions, 2654 flow. Second operand 8 states and 213 transitions. [2024-06-27 18:58:44,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 279 transitions, 3648 flow [2024-06-27 18:58:45,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 279 transitions, 3488 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 18:58:45,091 INFO L231 Difference]: Finished difference. Result has 168 places, 206 transitions, 2702 flow [2024-06-27 18:58:45,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2702, PETRI_PLACES=168, PETRI_TRANSITIONS=206} [2024-06-27 18:58:45,091 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-06-27 18:58:45,091 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 206 transitions, 2702 flow [2024-06-27 18:58:45,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:45,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:45,092 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 18:58:45,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:58:45,092 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:45,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1734748242, now seen corresponding path program 6 times [2024-06-27 18:58:45,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:45,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454410880] [2024-06-27 18:58:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:45,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:47,737 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 18:58:47,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:47,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454410880] [2024-06-27 18:58:47,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454410880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:47,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:47,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:47,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844189585] [2024-06-27 18:58:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:47,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:47,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:47,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:47,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:47,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:47,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 206 transitions, 2702 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:47,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:47,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:47,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:49,829 INFO L124 PetriNetUnfolderBase]: 5709/8916 cut-off events. [2024-06-27 18:58:49,829 INFO L125 PetriNetUnfolderBase]: For 171243/171276 co-relation queries the response was YES. [2024-06-27 18:58:49,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49613 conditions, 8916 events. 5709/8916 cut-off events. For 171243/171276 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 55629 event pairs, 1410 based on Foata normal form. 29/8932 useless extension candidates. Maximal degree in co-relation 49533. Up to 7607 conditions per place. [2024-06-27 18:58:49,909 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 206 selfloop transitions, 60 changer transitions 0/273 dead transitions. [2024-06-27 18:58:49,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 273 transitions, 3518 flow [2024-06-27 18:58:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:58:49,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:58:49,911 INFO L175 Difference]: Start difference. First operand has 168 places, 206 transitions, 2702 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:58:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 273 transitions, 3518 flow [2024-06-27 18:58:50,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 273 transitions, 3419 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:58:50,207 INFO L231 Difference]: Finished difference. Result has 172 places, 207 transitions, 2766 flow [2024-06-27 18:58:50,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2603, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2766, PETRI_PLACES=172, PETRI_TRANSITIONS=207} [2024-06-27 18:58:50,211 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 121 predicate places. [2024-06-27 18:58:50,211 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 207 transitions, 2766 flow [2024-06-27 18:58:50,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:50,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:50,212 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 18:58:50,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:58:50,212 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:50,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1535446452, now seen corresponding path program 7 times [2024-06-27 18:58:50,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:50,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35174207] [2024-06-27 18:58:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:50,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:53,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35174207] [2024-06-27 18:58:53,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35174207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:53,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:53,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:53,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676088560] [2024-06-27 18:58:53,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:53,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:53,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:53,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:53,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 207 transitions, 2766 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:53,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:53,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:53,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:55,837 INFO L124 PetriNetUnfolderBase]: 5681/8831 cut-off events. [2024-06-27 18:58:55,837 INFO L125 PetriNetUnfolderBase]: For 164356/164364 co-relation queries the response was YES. [2024-06-27 18:58:55,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49028 conditions, 8831 events. 5681/8831 cut-off events. For 164356/164364 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 54576 event pairs, 1405 based on Foata normal form. 18/8831 useless extension candidates. Maximal degree in co-relation 48946. Up to 7563 conditions per place. [2024-06-27 18:58:55,923 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 207 selfloop transitions, 70 changer transitions 0/284 dead transitions. [2024-06-27 18:58:55,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 284 transitions, 3610 flow [2024-06-27 18:58:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 18:58:55,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541371158392435 [2024-06-27 18:58:55,926 INFO L175 Difference]: Start difference. First operand has 172 places, 207 transitions, 2766 flow. Second operand 9 states and 229 transitions. [2024-06-27 18:58:55,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 284 transitions, 3610 flow [2024-06-27 18:58:56,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 284 transitions, 3461 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 18:58:56,254 INFO L231 Difference]: Finished difference. Result has 175 places, 207 transitions, 2764 flow [2024-06-27 18:58:56,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2764, PETRI_PLACES=175, PETRI_TRANSITIONS=207} [2024-06-27 18:58:56,255 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 124 predicate places. [2024-06-27 18:58:56,255 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 207 transitions, 2764 flow [2024-06-27 18:58:56,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:56,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:56,255 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 18:58:56,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:58:56,255 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:56,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash -316652102, now seen corresponding path program 8 times [2024-06-27 18:58:56,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:56,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744358530] [2024-06-27 18:58:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:56,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:59,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:59,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744358530] [2024-06-27 18:58:59,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744358530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:59,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:59,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:59,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981310852] [2024-06-27 18:58:59,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:59,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:59,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:59,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:59,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:59,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:59,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 207 transitions, 2764 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:59,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:59,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:59,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:01,670 INFO L124 PetriNetUnfolderBase]: 5749/8939 cut-off events. [2024-06-27 18:59:01,670 INFO L125 PetriNetUnfolderBase]: For 157942/157950 co-relation queries the response was YES. [2024-06-27 18:59:01,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48919 conditions, 8939 events. 5749/8939 cut-off events. For 157942/157950 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 55399 event pairs, 1385 based on Foata normal form. 14/8935 useless extension candidates. Maximal degree in co-relation 48836. Up to 7455 conditions per place. [2024-06-27 18:59:01,740 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 219 selfloop transitions, 73 changer transitions 0/299 dead transitions. [2024-06-27 18:59:01,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 299 transitions, 3728 flow [2024-06-27 18:59:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:59:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:59:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-27 18:59:01,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446808510638298 [2024-06-27 18:59:01,742 INFO L175 Difference]: Start difference. First operand has 175 places, 207 transitions, 2764 flow. Second operand 10 states and 256 transitions. [2024-06-27 18:59:01,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 299 transitions, 3728 flow [2024-06-27 18:59:01,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 299 transitions, 3581 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:01,956 INFO L231 Difference]: Finished difference. Result has 178 places, 208 transitions, 2807 flow [2024-06-27 18:59:01,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2807, PETRI_PLACES=178, PETRI_TRANSITIONS=208} [2024-06-27 18:59:01,957 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 127 predicate places. [2024-06-27 18:59:01,957 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 208 transitions, 2807 flow [2024-06-27 18:59:01,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:01,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:01,958 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 18:59:01,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:59:01,958 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:01,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash 249477182, now seen corresponding path program 2 times [2024-06-27 18:59:01,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:01,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675749184] [2024-06-27 18:59:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:04,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:04,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675749184] [2024-06-27 18:59:04,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675749184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:04,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:04,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:04,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462906766] [2024-06-27 18:59:04,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:04,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:04,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:04,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:04,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 208 transitions, 2807 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:04,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:04,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:04,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:06,728 INFO L124 PetriNetUnfolderBase]: 5875/9210 cut-off events. [2024-06-27 18:59:06,728 INFO L125 PetriNetUnfolderBase]: For 170224/170257 co-relation queries the response was YES. [2024-06-27 18:59:06,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50409 conditions, 9210 events. 5875/9210 cut-off events. For 170224/170257 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 57962 event pairs, 1424 based on Foata normal form. 25/9222 useless extension candidates. Maximal degree in co-relation 50325. Up to 7653 conditions per place. [2024-06-27 18:59:06,802 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 209 selfloop transitions, 62 changer transitions 0/278 dead transitions. [2024-06-27 18:59:06,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 278 transitions, 3649 flow [2024-06-27 18:59:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:59:06,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 18:59:06,811 INFO L175 Difference]: Start difference. First operand has 178 places, 208 transitions, 2807 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:59:06,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 278 transitions, 3649 flow [2024-06-27 18:59:07,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 278 transitions, 3479 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 18:59:07,087 INFO L231 Difference]: Finished difference. Result has 178 places, 209 transitions, 2807 flow [2024-06-27 18:59:07,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2637, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2807, PETRI_PLACES=178, PETRI_TRANSITIONS=209} [2024-06-27 18:59:07,088 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 127 predicate places. [2024-06-27 18:59:07,089 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 209 transitions, 2807 flow [2024-06-27 18:59:07,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:07,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:07,089 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 18:59:07,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:59:07,089 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:07,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1921707318, now seen corresponding path program 3 times [2024-06-27 18:59:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:07,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973347993] [2024-06-27 18:59:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:07,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:09,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:09,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973347993] [2024-06-27 18:59:09,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973347993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:09,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:09,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:09,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368276190] [2024-06-27 18:59:09,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:09,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:09,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:09,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:09,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:09,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:09,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 209 transitions, 2807 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:09,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:09,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:09,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:12,050 INFO L124 PetriNetUnfolderBase]: 5855/9170 cut-off events. [2024-06-27 18:59:12,050 INFO L125 PetriNetUnfolderBase]: For 161866/161899 co-relation queries the response was YES. [2024-06-27 18:59:12,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49334 conditions, 9170 events. 5855/9170 cut-off events. For 161866/161899 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 57418 event pairs, 1251 based on Foata normal form. 25/9182 useless extension candidates. Maximal degree in co-relation 49249. Up to 6171 conditions per place. [2024-06-27 18:59:12,135 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 199 selfloop transitions, 72 changer transitions 0/278 dead transitions. [2024-06-27 18:59:12,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 278 transitions, 3541 flow [2024-06-27 18:59:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:59:12,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-27 18:59:12,156 INFO L175 Difference]: Start difference. First operand has 178 places, 209 transitions, 2807 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:59:12,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 278 transitions, 3541 flow [2024-06-27 18:59:12,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 278 transitions, 3389 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:12,473 INFO L231 Difference]: Finished difference. Result has 179 places, 208 transitions, 2731 flow [2024-06-27 18:59:12,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2731, PETRI_PLACES=179, PETRI_TRANSITIONS=208} [2024-06-27 18:59:12,474 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 128 predicate places. [2024-06-27 18:59:12,474 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 208 transitions, 2731 flow [2024-06-27 18:59:12,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:12,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:12,474 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 18:59:12,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:59:12,474 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:12,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:12,475 INFO L85 PathProgramCache]: Analyzing trace with hash -738043951, now seen corresponding path program 1 times [2024-06-27 18:59:12,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:12,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46637047] [2024-06-27 18:59:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:12,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:13,874 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 18:59:13,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:13,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46637047] [2024-06-27 18:59:13,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46637047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:13,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:13,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:59:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843832509] [2024-06-27 18:59:13,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:13,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:59:13,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:59:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:59:13,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:13,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 208 transitions, 2731 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:13,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:13,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:13,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:15,807 INFO L124 PetriNetUnfolderBase]: 5873/9315 cut-off events. [2024-06-27 18:59:15,807 INFO L125 PetriNetUnfolderBase]: For 154720/154722 co-relation queries the response was YES. [2024-06-27 18:59:15,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49525 conditions, 9315 events. 5873/9315 cut-off events. For 154720/154722 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60105 event pairs, 1820 based on Foata normal form. 1/9312 useless extension candidates. Maximal degree in co-relation 49439. Up to 8521 conditions per place. [2024-06-27 18:59:15,896 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 209 selfloop transitions, 33 changer transitions 0/249 dead transitions. [2024-06-27 18:59:15,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 249 transitions, 3619 flow [2024-06-27 18:59:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 18:59:15,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070921985815603 [2024-06-27 18:59:15,898 INFO L175 Difference]: Start difference. First operand has 179 places, 208 transitions, 2731 flow. Second operand 6 states and 143 transitions. [2024-06-27 18:59:15,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 249 transitions, 3619 flow [2024-06-27 18:59:16,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 249 transitions, 3377 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 18:59:16,191 INFO L231 Difference]: Finished difference. Result has 178 places, 220 transitions, 2763 flow [2024-06-27 18:59:16,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2763, PETRI_PLACES=178, PETRI_TRANSITIONS=220} [2024-06-27 18:59:16,193 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 127 predicate places. [2024-06-27 18:59:16,193 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 220 transitions, 2763 flow [2024-06-27 18:59:16,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:16,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:16,194 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 18:59:16,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:59:16,194 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:16,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash -283341935, now seen corresponding path program 2 times [2024-06-27 18:59:16,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:16,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669317811] [2024-06-27 18:59:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:16,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:17,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:17,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669317811] [2024-06-27 18:59:17,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669317811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:17,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:17,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:59:17,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986213200] [2024-06-27 18:59:17,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:17,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:59:17,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:59:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:59:17,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:17,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 220 transitions, 2763 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:17,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:17,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:17,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:19,371 INFO L124 PetriNetUnfolderBase]: 5891/9352 cut-off events. [2024-06-27 18:59:19,371 INFO L125 PetriNetUnfolderBase]: For 151484/151486 co-relation queries the response was YES. [2024-06-27 18:59:19,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48601 conditions, 9352 events. 5891/9352 cut-off events. For 151484/151486 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60402 event pairs, 1811 based on Foata normal form. 1/9351 useless extension candidates. Maximal degree in co-relation 48515. Up to 8570 conditions per place. [2024-06-27 18:59:19,447 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 218 selfloop transitions, 30 changer transitions 0/255 dead transitions. [2024-06-27 18:59:19,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 255 transitions, 3487 flow [2024-06-27 18:59:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 18:59:19,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-27 18:59:19,458 INFO L175 Difference]: Start difference. First operand has 178 places, 220 transitions, 2763 flow. Second operand 6 states and 146 transitions. [2024-06-27 18:59:19,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 255 transitions, 3487 flow [2024-06-27 18:59:19,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 255 transitions, 3379 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-06-27 18:59:19,685 INFO L231 Difference]: Finished difference. Result has 184 places, 224 transitions, 2807 flow [2024-06-27 18:59:19,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2807, PETRI_PLACES=184, PETRI_TRANSITIONS=224} [2024-06-27 18:59:19,691 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 133 predicate places. [2024-06-27 18:59:19,691 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 224 transitions, 2807 flow [2024-06-27 18:59:19,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:19,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:19,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:19,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:59:19,692 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:19,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1127550392, now seen corresponding path program 1 times [2024-06-27 18:59:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813322980] [2024-06-27 18:59:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:19,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:22,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:22,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813322980] [2024-06-27 18:59:22,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813322980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:22,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:22,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:22,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106565795] [2024-06-27 18:59:22,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:22,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:22,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:22,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:59:22,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 224 transitions, 2807 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:22,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:22,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:59:22,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:24,335 INFO L124 PetriNetUnfolderBase]: 5780/9318 cut-off events. [2024-06-27 18:59:24,335 INFO L125 PetriNetUnfolderBase]: For 159659/159736 co-relation queries the response was YES. [2024-06-27 18:59:24,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48453 conditions, 9318 events. 5780/9318 cut-off events. For 159659/159736 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 61300 event pairs, 1686 based on Foata normal form. 68/9335 useless extension candidates. Maximal degree in co-relation 48363. Up to 8049 conditions per place. [2024-06-27 18:59:24,431 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 208 selfloop transitions, 74 changer transitions 0/301 dead transitions. [2024-06-27 18:59:24,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 301 transitions, 3923 flow [2024-06-27 18:59:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:59:24,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 18:59:24,439 INFO L175 Difference]: Start difference. First operand has 184 places, 224 transitions, 2807 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:59:24,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 301 transitions, 3923 flow [2024-06-27 18:59:24,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 301 transitions, 3878 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 18:59:24,883 INFO L231 Difference]: Finished difference. Result has 190 places, 250 transitions, 3249 flow [2024-06-27 18:59:24,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3249, PETRI_PLACES=190, PETRI_TRANSITIONS=250} [2024-06-27 18:59:24,885 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 139 predicate places. [2024-06-27 18:59:24,885 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 250 transitions, 3249 flow [2024-06-27 18:59:24,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:24,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:24,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:24,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:59:24,886 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:24,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash -193431996, now seen corresponding path program 2 times [2024-06-27 18:59:24,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:24,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325976364] [2024-06-27 18:59:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:24,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:27,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:27,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325976364] [2024-06-27 18:59:27,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325976364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:27,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:27,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:27,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727934106] [2024-06-27 18:59:27,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:27,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:27,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:27,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:59:27,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 250 transitions, 3249 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:27,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:27,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:59:27,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:29,140 INFO L124 PetriNetUnfolderBase]: 5769/9316 cut-off events. [2024-06-27 18:59:29,141 INFO L125 PetriNetUnfolderBase]: For 169827/169905 co-relation queries the response was YES. [2024-06-27 18:59:29,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50148 conditions, 9316 events. 5769/9316 cut-off events. For 169827/169905 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 61518 event pairs, 1719 based on Foata normal form. 74/9328 useless extension candidates. Maximal degree in co-relation 50055. Up to 7967 conditions per place. [2024-06-27 18:59:29,238 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 195 selfloop transitions, 74 changer transitions 0/288 dead transitions. [2024-06-27 18:59:29,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 288 transitions, 4057 flow [2024-06-27 18:59:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 18:59:29,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 18:59:29,240 INFO L175 Difference]: Start difference. First operand has 190 places, 250 transitions, 3249 flow. Second operand 6 states and 148 transitions. [2024-06-27 18:59:29,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 288 transitions, 4057 flow [2024-06-27 18:59:29,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 288 transitions, 3987 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 18:59:29,614 INFO L231 Difference]: Finished difference. Result has 195 places, 257 transitions, 3446 flow [2024-06-27 18:59:29,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3179, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3446, PETRI_PLACES=195, PETRI_TRANSITIONS=257} [2024-06-27 18:59:29,614 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 144 predicate places. [2024-06-27 18:59:29,615 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 257 transitions, 3446 flow [2024-06-27 18:59:29,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:29,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:29,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:29,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:59:29,615 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:29,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash -193847706, now seen corresponding path program 3 times [2024-06-27 18:59:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:29,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410262370] [2024-06-27 18:59:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:29,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:31,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:31,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410262370] [2024-06-27 18:59:31,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410262370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:31,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:31,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:31,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528805884] [2024-06-27 18:59:31,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:31,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:31,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:31,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:31,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:31,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:59:31,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 257 transitions, 3446 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:31,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:31,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:59:31,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:33,885 INFO L124 PetriNetUnfolderBase]: 5759/9298 cut-off events. [2024-06-27 18:59:33,885 INFO L125 PetriNetUnfolderBase]: For 177249/177326 co-relation queries the response was YES. [2024-06-27 18:59:33,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51417 conditions, 9298 events. 5759/9298 cut-off events. For 177249/177326 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 61297 event pairs, 1708 based on Foata normal form. 68/9316 useless extension candidates. Maximal degree in co-relation 51321. Up to 8043 conditions per place. [2024-06-27 18:59:33,965 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 200 selfloop transitions, 72 changer transitions 0/291 dead transitions. [2024-06-27 18:59:33,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 291 transitions, 4100 flow [2024-06-27 18:59:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 18:59:33,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:59:33,967 INFO L175 Difference]: Start difference. First operand has 195 places, 257 transitions, 3446 flow. Second operand 6 states and 153 transitions. [2024-06-27 18:59:33,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 291 transitions, 4100 flow [2024-06-27 18:59:34,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 291 transitions, 3983 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-27 18:59:34,309 INFO L231 Difference]: Finished difference. Result has 199 places, 257 transitions, 3497 flow [2024-06-27 18:59:34,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3329, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3497, PETRI_PLACES=199, PETRI_TRANSITIONS=257} [2024-06-27 18:59:34,310 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 148 predicate places. [2024-06-27 18:59:34,310 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 257 transitions, 3497 flow [2024-06-27 18:59:34,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:34,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:34,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:34,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:59:34,310 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:34,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:34,311 INFO L85 PathProgramCache]: Analyzing trace with hash 948303354, now seen corresponding path program 1 times [2024-06-27 18:59:34,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:34,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888405679] [2024-06-27 18:59:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:34,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:35,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:35,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888405679] [2024-06-27 18:59:35,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888405679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:35,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:35,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:59:35,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329916081] [2024-06-27 18:59:35,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:35,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:59:35,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:35,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:59:35,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:59:35,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:35,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 257 transitions, 3497 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 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 18:59:35,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:35,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:35,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:37,906 INFO L124 PetriNetUnfolderBase]: 6198/9809 cut-off events. [2024-06-27 18:59:37,907 INFO L125 PetriNetUnfolderBase]: For 180924/180932 co-relation queries the response was YES. [2024-06-27 18:59:37,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54057 conditions, 9809 events. 6198/9809 cut-off events. For 180924/180932 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 63348 event pairs, 1859 based on Foata normal form. 5/9811 useless extension candidates. Maximal degree in co-relation 53959. Up to 8951 conditions per place. [2024-06-27 18:59:38,001 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 245 selfloop transitions, 37 changer transitions 0/289 dead transitions. [2024-06-27 18:59:38,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 289 transitions, 4293 flow [2024-06-27 18:59:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:38,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 18:59:38,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035460992907801 [2024-06-27 18:59:38,003 INFO L175 Difference]: Start difference. First operand has 199 places, 257 transitions, 3497 flow. Second operand 6 states and 142 transitions. [2024-06-27 18:59:38,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 289 transitions, 4293 flow [2024-06-27 18:59:38,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 289 transitions, 4143 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 18:59:38,352 INFO L231 Difference]: Finished difference. Result has 200 places, 261 transitions, 3490 flow [2024-06-27 18:59:38,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3347, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3490, PETRI_PLACES=200, PETRI_TRANSITIONS=261} [2024-06-27 18:59:38,353 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 149 predicate places. [2024-06-27 18:59:38,353 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 261 transitions, 3490 flow [2024-06-27 18:59:38,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 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 18:59:38,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:38,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:38,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:59:38,353 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:38,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1386043772, now seen corresponding path program 1 times [2024-06-27 18:59:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:38,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034337403] [2024-06-27 18:59:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:38,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:40,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:40,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034337403] [2024-06-27 18:59:40,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034337403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:40,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:40,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:40,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641453657] [2024-06-27 18:59:40,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:40,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:40,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:40,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:40,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:40,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 261 transitions, 3490 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:40,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:40,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:40,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:42,367 INFO L124 PetriNetUnfolderBase]: 6234/9792 cut-off events. [2024-06-27 18:59:42,367 INFO L125 PetriNetUnfolderBase]: For 186042/186044 co-relation queries the response was YES. [2024-06-27 18:59:42,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54167 conditions, 9792 events. 6234/9792 cut-off events. For 186042/186044 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 62717 event pairs, 1845 based on Foata normal form. 2/9790 useless extension candidates. Maximal degree in co-relation 54068. Up to 8853 conditions per place. [2024-06-27 18:59:42,477 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 252 selfloop transitions, 51 changer transitions 0/310 dead transitions. [2024-06-27 18:59:42,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 310 transitions, 4564 flow [2024-06-27 18:59:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:59:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:59:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 18:59:42,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:59:42,481 INFO L175 Difference]: Start difference. First operand has 200 places, 261 transitions, 3490 flow. Second operand 7 states and 168 transitions. [2024-06-27 18:59:42,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 310 transitions, 4564 flow [2024-06-27 18:59:42,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 310 transitions, 4429 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 18:59:42,881 INFO L231 Difference]: Finished difference. Result has 204 places, 273 transitions, 3696 flow [2024-06-27 18:59:42,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3696, PETRI_PLACES=204, PETRI_TRANSITIONS=273} [2024-06-27 18:59:42,883 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 153 predicate places. [2024-06-27 18:59:42,883 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 273 transitions, 3696 flow [2024-06-27 18:59:42,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:42,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:42,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:42,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:59:42,884 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:42,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1382502684, now seen corresponding path program 2 times [2024-06-27 18:59:42,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:42,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540319584] [2024-06-27 18:59:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:42,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:44,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:44,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540319584] [2024-06-27 18:59:44,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540319584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:44,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:44,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:44,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812320894] [2024-06-27 18:59:44,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:44,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:44,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:44,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:44,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:44,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:44,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 273 transitions, 3696 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:44,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:44,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:44,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:47,078 INFO L124 PetriNetUnfolderBase]: 6231/9796 cut-off events. [2024-06-27 18:59:47,078 INFO L125 PetriNetUnfolderBase]: For 196034/196036 co-relation queries the response was YES. [2024-06-27 18:59:47,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55649 conditions, 9796 events. 6231/9796 cut-off events. For 196034/196036 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 62881 event pairs, 1854 based on Foata normal form. 1/9793 useless extension candidates. Maximal degree in co-relation 55549. Up to 8996 conditions per place. [2024-06-27 18:59:47,185 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 258 selfloop transitions, 41 changer transitions 0/306 dead transitions. [2024-06-27 18:59:47,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 306 transitions, 4484 flow [2024-06-27 18:59:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:59:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:59:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 18:59:47,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49240121580547114 [2024-06-27 18:59:47,186 INFO L175 Difference]: Start difference. First operand has 204 places, 273 transitions, 3696 flow. Second operand 7 states and 162 transitions. [2024-06-27 18:59:47,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 306 transitions, 4484 flow [2024-06-27 18:59:47,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 306 transitions, 4399 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-27 18:59:47,721 INFO L231 Difference]: Finished difference. Result has 209 places, 273 transitions, 3700 flow [2024-06-27 18:59:47,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3611, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3700, PETRI_PLACES=209, PETRI_TRANSITIONS=273} [2024-06-27 18:59:47,721 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2024-06-27 18:59:47,722 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 273 transitions, 3700 flow [2024-06-27 18:59:47,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:47,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:47,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:47,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:59:47,722 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:47,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1525945884, now seen corresponding path program 3 times [2024-06-27 18:59:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886206054] [2024-06-27 18:59:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:49,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:49,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886206054] [2024-06-27 18:59:49,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886206054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:49,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:49,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:59:49,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576654833] [2024-06-27 18:59:49,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:49,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:59:49,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:59:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:59:49,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:49,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 273 transitions, 3700 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 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 18:59:49,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:49,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:49,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:51,210 INFO L124 PetriNetUnfolderBase]: 6228/9799 cut-off events. [2024-06-27 18:59:51,210 INFO L125 PetriNetUnfolderBase]: For 195778/195780 co-relation queries the response was YES. [2024-06-27 18:59:51,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55108 conditions, 9799 events. 6228/9799 cut-off events. For 195778/195780 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 62875 event pairs, 1841 based on Foata normal form. 1/9798 useless extension candidates. Maximal degree in co-relation 55005. Up to 9026 conditions per place. [2024-06-27 18:59:51,319 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 266 selfloop transitions, 30 changer transitions 0/303 dead transitions. [2024-06-27 18:59:51,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 303 transitions, 4382 flow [2024-06-27 18:59:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:59:51,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 18:59:51,321 INFO L175 Difference]: Start difference. First operand has 209 places, 273 transitions, 3700 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:59:51,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 303 transitions, 4382 flow [2024-06-27 18:59:51,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 303 transitions, 4230 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:51,705 INFO L231 Difference]: Finished difference. Result has 208 places, 273 transitions, 3620 flow [2024-06-27 18:59:51,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3548, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3620, PETRI_PLACES=208, PETRI_TRANSITIONS=273} [2024-06-27 18:59:51,706 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 157 predicate places. [2024-06-27 18:59:51,706 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 273 transitions, 3620 flow [2024-06-27 18:59:51,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 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 18:59:51,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:51,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:51,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:59:51,707 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:51,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash -193663194, now seen corresponding path program 2 times [2024-06-27 18:59:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:51,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533316553] [2024-06-27 18:59:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:53,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:53,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533316553] [2024-06-27 18:59:53,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533316553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:53,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:53,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:53,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881951027] [2024-06-27 18:59:53,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:53,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:53,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:53,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:53,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 273 transitions, 3620 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:53,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:53,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:53,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:55,782 INFO L124 PetriNetUnfolderBase]: 6306/9903 cut-off events. [2024-06-27 18:59:55,782 INFO L125 PetriNetUnfolderBase]: For 205104/205106 co-relation queries the response was YES. [2024-06-27 18:59:55,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55863 conditions, 9903 events. 6306/9903 cut-off events. For 205104/205106 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 63374 event pairs, 1827 based on Foata normal form. 2/9903 useless extension candidates. Maximal degree in co-relation 55760. Up to 9004 conditions per place. [2024-06-27 18:59:55,884 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 273 selfloop transitions, 43 changer transitions 0/323 dead transitions. [2024-06-27 18:59:55,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 323 transitions, 4683 flow [2024-06-27 18:59:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:59:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:59:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:59:55,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-27 18:59:55,886 INFO L175 Difference]: Start difference. First operand has 208 places, 273 transitions, 3620 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:59:55,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 323 transitions, 4683 flow [2024-06-27 18:59:56,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 323 transitions, 4599 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:56,326 INFO L231 Difference]: Finished difference. Result has 209 places, 281 transitions, 3779 flow [2024-06-27 18:59:56,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3779, PETRI_PLACES=209, PETRI_TRANSITIONS=281} [2024-06-27 18:59:56,326 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2024-06-27 18:59:56,327 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 281 transitions, 3779 flow [2024-06-27 18:59:56,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:56,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:56,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:56,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:59:56,327 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:56,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash -193426044, now seen corresponding path program 3 times [2024-06-27 18:59:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:56,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727339912] [2024-06-27 18:59:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:56,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:58,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727339912] [2024-06-27 18:59:58,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727339912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:58,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:58,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:58,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632233554] [2024-06-27 18:59:58,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:58,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:58,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:58,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:58,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:58,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 281 transitions, 3779 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:58,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:58,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:58,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:00,290 INFO L124 PetriNetUnfolderBase]: 6300/9899 cut-off events. [2024-06-27 19:00:00,291 INFO L125 PetriNetUnfolderBase]: For 203051/203053 co-relation queries the response was YES. [2024-06-27 19:00:00,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55959 conditions, 9899 events. 6300/9899 cut-off events. For 203051/203053 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 63470 event pairs, 1827 based on Foata normal form. 2/9899 useless extension candidates. Maximal degree in co-relation 55856. Up to 9001 conditions per place. [2024-06-27 19:00:00,405 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 271 selfloop transitions, 43 changer transitions 0/321 dead transitions. [2024-06-27 19:00:00,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 321 transitions, 4617 flow [2024-06-27 19:00:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:00:00,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946808510638298 [2024-06-27 19:00:00,407 INFO L175 Difference]: Start difference. First operand has 209 places, 281 transitions, 3779 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:00:00,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 321 transitions, 4617 flow [2024-06-27 19:00:00,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 321 transitions, 4462 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:00,821 INFO L231 Difference]: Finished difference. Result has 213 places, 281 transitions, 3717 flow [2024-06-27 19:00:00,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3717, PETRI_PLACES=213, PETRI_TRANSITIONS=281} [2024-06-27 19:00:00,821 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 162 predicate places. [2024-06-27 19:00:00,821 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 281 transitions, 3717 flow [2024-06-27 19:00:00,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:00,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:00,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:00,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:00:00,822 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:00,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:00,823 INFO L85 PathProgramCache]: Analyzing trace with hash -193417116, now seen corresponding path program 1 times [2024-06-27 19:00:00,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:00,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259644446] [2024-06-27 19:00:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:00,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:03,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:03,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259644446] [2024-06-27 19:00:03,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259644446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:03,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:03,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:03,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559278704] [2024-06-27 19:00:03,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:03,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:03,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:03,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:03,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:03,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:00:03,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 281 transitions, 3717 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:03,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:03,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:00:03,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:05,351 INFO L124 PetriNetUnfolderBase]: 5873/9326 cut-off events. [2024-06-27 19:00:05,352 INFO L125 PetriNetUnfolderBase]: For 201835/201912 co-relation queries the response was YES. [2024-06-27 19:00:05,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52758 conditions, 9326 events. 5873/9326 cut-off events. For 201835/201912 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 60583 event pairs, 1732 based on Foata normal form. 66/9346 useless extension candidates. Maximal degree in co-relation 52654. Up to 8473 conditions per place. [2024-06-27 19:00:05,463 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 268 selfloop transitions, 21 changer transitions 0/308 dead transitions. [2024-06-27 19:00:05,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 308 transitions, 4417 flow [2024-06-27 19:00:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:00:05,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:00:05,465 INFO L175 Difference]: Start difference. First operand has 213 places, 281 transitions, 3717 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:00:05,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 308 transitions, 4417 flow [2024-06-27 19:00:05,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 308 transitions, 4297 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:00:05,952 INFO L231 Difference]: Finished difference. Result has 213 places, 284 transitions, 3703 flow [2024-06-27 19:00:05,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3703, PETRI_PLACES=213, PETRI_TRANSITIONS=284} [2024-06-27 19:00:05,953 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 162 predicate places. [2024-06-27 19:00:05,953 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 284 transitions, 3703 flow [2024-06-27 19:00:05,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:05,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:05,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:05,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:00:05,954 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:05,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:05,954 INFO L85 PathProgramCache]: Analyzing trace with hash -600043410, now seen corresponding path program 1 times [2024-06-27 19:00:05,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:05,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10592596] [2024-06-27 19:00:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:05,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:08,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:08,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10592596] [2024-06-27 19:00:08,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10592596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:08,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:08,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:08,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140979396] [2024-06-27 19:00:08,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:08,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:08,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:08,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:08,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:08,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 284 transitions, 3703 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:08,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:08,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:08,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:10,892 INFO L124 PetriNetUnfolderBase]: 6344/10006 cut-off events. [2024-06-27 19:00:10,892 INFO L125 PetriNetUnfolderBase]: For 214331/214339 co-relation queries the response was YES. [2024-06-27 19:00:10,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56589 conditions, 10006 events. 6344/10006 cut-off events. For 214331/214339 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 64212 event pairs, 1585 based on Foata normal form. 9/10010 useless extension candidates. Maximal degree in co-relation 56484. Up to 8756 conditions per place. [2024-06-27 19:00:11,025 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 274 selfloop transitions, 69 changer transitions 0/350 dead transitions. [2024-06-27 19:00:11,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 350 transitions, 5040 flow [2024-06-27 19:00:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:00:11,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 19:00:11,026 INFO L175 Difference]: Start difference. First operand has 213 places, 284 transitions, 3703 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:00:11,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 350 transitions, 5040 flow [2024-06-27 19:00:11,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 350 transitions, 4956 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:11,517 INFO L231 Difference]: Finished difference. Result has 218 places, 296 transitions, 4014 flow [2024-06-27 19:00:11,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3619, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4014, PETRI_PLACES=218, PETRI_TRANSITIONS=296} [2024-06-27 19:00:11,517 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 167 predicate places. [2024-06-27 19:00:11,518 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 296 transitions, 4014 flow [2024-06-27 19:00:11,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:11,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:11,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:11,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:00:11,518 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:11,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:11,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2031654276, now seen corresponding path program 2 times [2024-06-27 19:00:11,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:11,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36969356] [2024-06-27 19:00:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:11,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:13,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:13,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36969356] [2024-06-27 19:00:13,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36969356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:13,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:13,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:13,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711737244] [2024-06-27 19:00:13,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:13,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:13,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:14,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:14,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 296 transitions, 4014 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:14,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:14,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:14,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:16,235 INFO L124 PetriNetUnfolderBase]: 6473/10297 cut-off events. [2024-06-27 19:00:16,235 INFO L125 PetriNetUnfolderBase]: For 232479/232481 co-relation queries the response was YES. [2024-06-27 19:00:16,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60032 conditions, 10297 events. 6473/10297 cut-off events. For 232479/232481 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 66800 event pairs, 1793 based on Foata normal form. 1/10296 useless extension candidates. Maximal degree in co-relation 59924. Up to 9045 conditions per place. [2024-06-27 19:00:16,362 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 276 selfloop transitions, 84 changer transitions 0/367 dead transitions. [2024-06-27 19:00:16,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 367 transitions, 5340 flow [2024-06-27 19:00:16,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:00:16,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:00:16,364 INFO L175 Difference]: Start difference. First operand has 218 places, 296 transitions, 4014 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:00:16,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 367 transitions, 5340 flow [2024-06-27 19:00:16,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 367 transitions, 5254 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-27 19:00:16,875 INFO L231 Difference]: Finished difference. Result has 226 places, 314 transitions, 4426 flow [2024-06-27 19:00:16,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3942, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4426, PETRI_PLACES=226, PETRI_TRANSITIONS=314} [2024-06-27 19:00:16,876 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 175 predicate places. [2024-06-27 19:00:16,876 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 314 transitions, 4426 flow [2024-06-27 19:00:16,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:16,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:16,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:16,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:00:16,877 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:16,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash 596066414, now seen corresponding path program 3 times [2024-06-27 19:00:16,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:16,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229919759] [2024-06-27 19:00:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:16,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:19,238 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 19:00:19,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:19,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229919759] [2024-06-27 19:00:19,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229919759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:19,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:19,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:19,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674076483] [2024-06-27 19:00:19,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:19,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:19,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:19,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:19,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:19,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:19,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 314 transitions, 4426 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:19,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:19,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:19,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:21,819 INFO L124 PetriNetUnfolderBase]: 6496/10253 cut-off events. [2024-06-27 19:00:21,820 INFO L125 PetriNetUnfolderBase]: For 244125/244141 co-relation queries the response was YES. [2024-06-27 19:00:21,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60683 conditions, 10253 events. 6496/10253 cut-off events. For 244125/244141 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 66099 event pairs, 1628 based on Foata normal form. 15/10259 useless extension candidates. Maximal degree in co-relation 60571. Up to 8923 conditions per place. [2024-06-27 19:00:21,927 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 284 selfloop transitions, 83 changer transitions 0/374 dead transitions. [2024-06-27 19:00:21,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 374 transitions, 5879 flow [2024-06-27 19:00:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:00:21,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:00:21,929 INFO L175 Difference]: Start difference. First operand has 226 places, 314 transitions, 4426 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:00:21,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 374 transitions, 5879 flow [2024-06-27 19:00:22,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 374 transitions, 5722 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:22,540 INFO L231 Difference]: Finished difference. Result has 230 places, 323 transitions, 4674 flow [2024-06-27 19:00:22,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4269, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4674, PETRI_PLACES=230, PETRI_TRANSITIONS=323} [2024-06-27 19:00:22,540 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 179 predicate places. [2024-06-27 19:00:22,540 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 323 transitions, 4674 flow [2024-06-27 19:00:22,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:22,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:22,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:22,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:00:22,541 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:22,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash -226150250, now seen corresponding path program 4 times [2024-06-27 19:00:22,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:22,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125749012] [2024-06-27 19:00:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:22,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:24,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:24,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125749012] [2024-06-27 19:00:24,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125749012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:24,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:24,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:24,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569572415] [2024-06-27 19:00:24,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:24,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:24,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:24,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:24,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 323 transitions, 4674 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:24,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:24,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:24,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:27,032 INFO L124 PetriNetUnfolderBase]: 6524/10295 cut-off events. [2024-06-27 19:00:27,032 INFO L125 PetriNetUnfolderBase]: For 255904/255920 co-relation queries the response was YES. [2024-06-27 19:00:27,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61505 conditions, 10295 events. 6524/10295 cut-off events. For 255904/255920 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 66399 event pairs, 1624 based on Foata normal form. 15/10301 useless extension candidates. Maximal degree in co-relation 61391. Up to 8941 conditions per place. [2024-06-27 19:00:27,151 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 280 selfloop transitions, 88 changer transitions 0/375 dead transitions. [2024-06-27 19:00:27,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 375 transitions, 5970 flow [2024-06-27 19:00:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:00:27,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167173252279635 [2024-06-27 19:00:27,153 INFO L175 Difference]: Start difference. First operand has 230 places, 323 transitions, 4674 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:00:27,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 375 transitions, 5970 flow [2024-06-27 19:00:27,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 375 transitions, 5874 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-27 19:00:27,769 INFO L231 Difference]: Finished difference. Result has 237 places, 329 transitions, 4920 flow [2024-06-27 19:00:27,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4920, PETRI_PLACES=237, PETRI_TRANSITIONS=329} [2024-06-27 19:00:27,770 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 186 predicate places. [2024-06-27 19:00:27,770 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 329 transitions, 4920 flow [2024-06-27 19:00:27,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:27,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:27,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:27,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:00:27,771 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:27,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:27,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1708603376, now seen corresponding path program 5 times [2024-06-27 19:00:27,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:27,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157152656] [2024-06-27 19:00:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:27,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:29,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157152656] [2024-06-27 19:00:29,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157152656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:29,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:29,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:29,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423881851] [2024-06-27 19:00:29,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:29,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:29,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:29,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:29,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:29,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 329 transitions, 4920 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:29,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:29,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:29,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:32,225 INFO L124 PetriNetUnfolderBase]: 6552/10247 cut-off events. [2024-06-27 19:00:32,226 INFO L125 PetriNetUnfolderBase]: For 254936/254944 co-relation queries the response was YES. [2024-06-27 19:00:32,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61863 conditions, 10247 events. 6552/10247 cut-off events. For 254936/254944 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 65366 event pairs, 1449 based on Foata normal form. 3/10242 useless extension candidates. Maximal degree in co-relation 61745. Up to 8728 conditions per place. [2024-06-27 19:00:32,364 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 237 selfloop transitions, 141 changer transitions 0/385 dead transitions. [2024-06-27 19:00:32,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 385 transitions, 6209 flow [2024-06-27 19:00:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:00:32,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 19:00:32,366 INFO L175 Difference]: Start difference. First operand has 237 places, 329 transitions, 4920 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:00:32,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 385 transitions, 6209 flow [2024-06-27 19:00:33,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 385 transitions, 5998 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 19:00:33,232 INFO L231 Difference]: Finished difference. Result has 242 places, 334 transitions, 5156 flow [2024-06-27 19:00:33,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5156, PETRI_PLACES=242, PETRI_TRANSITIONS=334} [2024-06-27 19:00:33,232 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 191 predicate places. [2024-06-27 19:00:33,232 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 334 transitions, 5156 flow [2024-06-27 19:00:33,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:33,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:33,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:33,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:00:33,233 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:33,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:33,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1714317296, now seen corresponding path program 6 times [2024-06-27 19:00:33,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:33,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954735458] [2024-06-27 19:00:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:33,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:35,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:35,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954735458] [2024-06-27 19:00:35,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954735458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:35,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:35,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:35,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202227270] [2024-06-27 19:00:35,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:35,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:35,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:35,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:35,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:35,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 334 transitions, 5156 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:35,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:35,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:35,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:38,418 INFO L124 PetriNetUnfolderBase]: 6549/10427 cut-off events. [2024-06-27 19:00:38,419 INFO L125 PetriNetUnfolderBase]: For 261347/261349 co-relation queries the response was YES. [2024-06-27 19:00:38,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62653 conditions, 10427 events. 6549/10427 cut-off events. For 261347/261349 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 68007 event pairs, 1661 based on Foata normal form. 1/10426 useless extension candidates. Maximal degree in co-relation 62533. Up to 8726 conditions per place. [2024-06-27 19:00:38,549 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 243 selfloop transitions, 145 changer transitions 0/395 dead transitions. [2024-06-27 19:00:38,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 395 transitions, 6283 flow [2024-06-27 19:00:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 19:00:38,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-27 19:00:38,551 INFO L175 Difference]: Start difference. First operand has 242 places, 334 transitions, 5156 flow. Second operand 8 states and 210 transitions. [2024-06-27 19:00:38,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 395 transitions, 6283 flow [2024-06-27 19:00:39,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 395 transitions, 6034 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 19:00:39,509 INFO L231 Difference]: Finished difference. Result has 245 places, 335 transitions, 5296 flow [2024-06-27 19:00:39,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5296, PETRI_PLACES=245, PETRI_TRANSITIONS=335} [2024-06-27 19:00:39,510 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 194 predicate places. [2024-06-27 19:00:39,510 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 335 transitions, 5296 flow [2024-06-27 19:00:39,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:39,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:39,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:39,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:00:39,510 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:39,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:39,512 INFO L85 PathProgramCache]: Analyzing trace with hash -667364899, now seen corresponding path program 1 times [2024-06-27 19:00:39,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:39,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853050663] [2024-06-27 19:00:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:39,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:41,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853050663] [2024-06-27 19:00:41,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853050663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:41,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:41,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:41,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197824789] [2024-06-27 19:00:41,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:41,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:41,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:41,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:41,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:41,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:41,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 335 transitions, 5296 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:41,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:41,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:41,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:43,849 INFO L124 PetriNetUnfolderBase]: 6585/10340 cut-off events. [2024-06-27 19:00:43,849 INFO L125 PetriNetUnfolderBase]: For 269659/269667 co-relation queries the response was YES. [2024-06-27 19:00:43,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63199 conditions, 10340 events. 6585/10340 cut-off events. For 269659/269667 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 66754 event pairs, 1887 based on Foata normal form. 6/10343 useless extension candidates. Maximal degree in co-relation 63079. Up to 9271 conditions per place. [2024-06-27 19:00:43,957 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 310 selfloop transitions, 58 changer transitions 0/375 dead transitions. [2024-06-27 19:00:43,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 375 transitions, 6312 flow [2024-06-27 19:00:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:00:43,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-27 19:00:43,959 INFO L175 Difference]: Start difference. First operand has 245 places, 335 transitions, 5296 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:00:43,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 375 transitions, 6312 flow [2024-06-27 19:00:44,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 375 transitions, 6077 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:44,627 INFO L231 Difference]: Finished difference. Result has 247 places, 339 transitions, 5252 flow [2024-06-27 19:00:44,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5252, PETRI_PLACES=247, PETRI_TRANSITIONS=339} [2024-06-27 19:00:44,628 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-06-27 19:00:44,628 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 339 transitions, 5252 flow [2024-06-27 19:00:44,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:44,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:44,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:44,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:00:44,629 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:44,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash -17681959, now seen corresponding path program 2 times [2024-06-27 19:00:44,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:44,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388105012] [2024-06-27 19:00:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:44,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:46,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:46,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388105012] [2024-06-27 19:00:46,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388105012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:46,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:46,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:46,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028012769] [2024-06-27 19:00:46,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:46,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:46,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:46,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:46,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:46,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:46,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 339 transitions, 5252 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:00:46,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:46,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:46,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:49,645 INFO L124 PetriNetUnfolderBase]: 6621/10373 cut-off events. [2024-06-27 19:00:49,645 INFO L125 PetriNetUnfolderBase]: For 267348/267350 co-relation queries the response was YES. [2024-06-27 19:00:49,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63108 conditions, 10373 events. 6621/10373 cut-off events. For 267348/267350 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 66650 event pairs, 1870 based on Foata normal form. 2/10371 useless extension candidates. Maximal degree in co-relation 62987. Up to 9303 conditions per place. [2024-06-27 19:00:49,771 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 322 selfloop transitions, 68 changer transitions 0/397 dead transitions. [2024-06-27 19:00:49,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 397 transitions, 6480 flow [2024-06-27 19:00:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:00:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:00:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:00:49,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 19:00:49,773 INFO L175 Difference]: Start difference. First operand has 247 places, 339 transitions, 5252 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:00:49,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 397 transitions, 6480 flow [2024-06-27 19:00:50,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 397 transitions, 6282 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:50,476 INFO L231 Difference]: Finished difference. Result has 252 places, 343 transitions, 5271 flow [2024-06-27 19:00:50,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5271, PETRI_PLACES=252, PETRI_TRANSITIONS=343} [2024-06-27 19:00:50,476 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 201 predicate places. [2024-06-27 19:00:50,476 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 343 transitions, 5271 flow [2024-06-27 19:00:50,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:00:50,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:50,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:50,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:00:50,477 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:50,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash 607502345, now seen corresponding path program 3 times [2024-06-27 19:00:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367548731] [2024-06-27 19:00:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:52,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:52,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367548731] [2024-06-27 19:00:52,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367548731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:52,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:52,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311196864] [2024-06-27 19:00:52,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:52,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:52,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:52,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:52,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 343 transitions, 5271 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:00:52,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:52,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:52,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:55,229 INFO L124 PetriNetUnfolderBase]: 6615/10364 cut-off events. [2024-06-27 19:00:55,230 INFO L125 PetriNetUnfolderBase]: For 268574/268576 co-relation queries the response was YES. [2024-06-27 19:00:55,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62874 conditions, 10364 events. 6615/10364 cut-off events. For 268574/268576 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 66660 event pairs, 1866 based on Foata normal form. 2/10362 useless extension candidates. Maximal degree in co-relation 62753. Up to 9298 conditions per place. [2024-06-27 19:00:55,357 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 312 selfloop transitions, 67 changer transitions 0/386 dead transitions. [2024-06-27 19:00:55,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 386 transitions, 6265 flow [2024-06-27 19:00:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:00:55,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-27 19:00:55,359 INFO L175 Difference]: Start difference. First operand has 252 places, 343 transitions, 5271 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:00:55,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 386 transitions, 6265 flow [2024-06-27 19:00:56,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 386 transitions, 5985 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-27 19:00:56,136 INFO L231 Difference]: Finished difference. Result has 250 places, 343 transitions, 5132 flow [2024-06-27 19:00:56,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4991, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5132, PETRI_PLACES=250, PETRI_TRANSITIONS=343} [2024-06-27 19:00:56,137 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 199 predicate places. [2024-06-27 19:00:56,137 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 343 transitions, 5132 flow [2024-06-27 19:00:56,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:00:56,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:56,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:56,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:00:56,137 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:56,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:56,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1708589705, now seen corresponding path program 4 times [2024-06-27 19:00:56,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:56,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916118210] [2024-06-27 19:00:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:56,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:57,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:57,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916118210] [2024-06-27 19:00:57,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916118210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:57,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:57,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218715530] [2024-06-27 19:00:57,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:57,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:57,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:57,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 343 transitions, 5132 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:57,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:57,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:57,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:00,459 INFO L124 PetriNetUnfolderBase]: 6651/10426 cut-off events. [2024-06-27 19:01:00,460 INFO L125 PetriNetUnfolderBase]: For 271962/271964 co-relation queries the response was YES. [2024-06-27 19:01:00,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62715 conditions, 10426 events. 6651/10426 cut-off events. For 271962/271964 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 67090 event pairs, 1847 based on Foata normal form. 2/10426 useless extension candidates. Maximal degree in co-relation 62595. Up to 9457 conditions per place. [2024-06-27 19:01:00,591 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 332 selfloop transitions, 48 changer transitions 0/387 dead transitions. [2024-06-27 19:01:00,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 387 transitions, 6168 flow [2024-06-27 19:01:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:01:00,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946808510638298 [2024-06-27 19:01:00,593 INFO L175 Difference]: Start difference. First operand has 250 places, 343 transitions, 5132 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:01:00,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 387 transitions, 6168 flow [2024-06-27 19:01:01,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 387 transitions, 6022 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:01:01,283 INFO L231 Difference]: Finished difference. Result has 251 places, 347 transitions, 5138 flow [2024-06-27 19:01:01,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5138, PETRI_PLACES=251, PETRI_TRANSITIONS=347} [2024-06-27 19:01:01,285 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 200 predicate places. [2024-06-27 19:01:01,285 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 347 transitions, 5138 flow [2024-06-27 19:01:01,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:01,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:01,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:01,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:01:01,286 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:01,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1708595285, now seen corresponding path program 5 times [2024-06-27 19:01:01,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:01,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383683937] [2024-06-27 19:01:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:01,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:03,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:03,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383683937] [2024-06-27 19:01:03,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383683937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:03,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:03,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:03,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245079564] [2024-06-27 19:01:03,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:03,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:03,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:03,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:03,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:03,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:03,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 347 transitions, 5138 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:03,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:03,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:03,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:05,380 INFO L124 PetriNetUnfolderBase]: 6645/10426 cut-off events. [2024-06-27 19:01:05,381 INFO L125 PetriNetUnfolderBase]: For 270684/270686 co-relation queries the response was YES. [2024-06-27 19:01:05,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61995 conditions, 10426 events. 6645/10426 cut-off events. For 270684/270686 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 67138 event pairs, 1857 based on Foata normal form. 2/10426 useless extension candidates. Maximal degree in co-relation 61874. Up to 9452 conditions per place. [2024-06-27 19:01:05,507 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 333 selfloop transitions, 47 changer transitions 0/387 dead transitions. [2024-06-27 19:01:05,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 387 transitions, 6018 flow [2024-06-27 19:01:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:01:05,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 19:01:05,509 INFO L175 Difference]: Start difference. First operand has 251 places, 347 transitions, 5138 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:01:05,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 387 transitions, 6018 flow [2024-06-27 19:01:06,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 387 transitions, 5911 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:06,207 INFO L231 Difference]: Finished difference. Result has 253 places, 347 transitions, 5132 flow [2024-06-27 19:01:06,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5132, PETRI_PLACES=253, PETRI_TRANSITIONS=347} [2024-06-27 19:01:06,208 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 202 predicate places. [2024-06-27 19:01:06,208 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 347 transitions, 5132 flow [2024-06-27 19:01:06,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:06,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:06,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:06,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:01:06,209 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:06,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:06,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1340851627, now seen corresponding path program 1 times [2024-06-27 19:01:06,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:06,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186716381] [2024-06-27 19:01:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:06,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:09,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:09,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186716381] [2024-06-27 19:01:09,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186716381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:09,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:09,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:09,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635576974] [2024-06-27 19:01:09,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:09,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:09,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:09,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:09,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 347 transitions, 5132 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:09,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:09,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:09,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:11,810 INFO L124 PetriNetUnfolderBase]: 6694/10633 cut-off events. [2024-06-27 19:01:11,810 INFO L125 PetriNetUnfolderBase]: For 276048/276056 co-relation queries the response was YES. [2024-06-27 19:01:11,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62777 conditions, 10633 events. 6694/10633 cut-off events. For 276048/276056 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 69228 event pairs, 1782 based on Foata normal form. 9/10640 useless extension candidates. Maximal degree in co-relation 62655. Up to 9164 conditions per place. [2024-06-27 19:01:11,927 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 313 selfloop transitions, 108 changer transitions 0/428 dead transitions. [2024-06-27 19:01:11,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 428 transitions, 6495 flow [2024-06-27 19:01:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:01:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:01:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 19:01:11,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2024-06-27 19:01:11,929 INFO L175 Difference]: Start difference. First operand has 253 places, 347 transitions, 5132 flow. Second operand 9 states and 230 transitions. [2024-06-27 19:01:11,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 428 transitions, 6495 flow [2024-06-27 19:01:12,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 428 transitions, 6358 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:01:12,556 INFO L231 Difference]: Finished difference. Result has 255 places, 353 transitions, 5344 flow [2024-06-27 19:01:12,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4995, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5344, PETRI_PLACES=255, PETRI_TRANSITIONS=353} [2024-06-27 19:01:12,556 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 204 predicate places. [2024-06-27 19:01:12,556 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 353 transitions, 5344 flow [2024-06-27 19:01:12,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:12,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:12,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:12,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:01:12,557 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:12,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:12,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1421773229, now seen corresponding path program 2 times [2024-06-27 19:01:12,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:12,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720045106] [2024-06-27 19:01:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:12,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:15,413 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 19:01:15,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720045106] [2024-06-27 19:01:15,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720045106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:15,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:15,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:15,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083276759] [2024-06-27 19:01:15,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:15,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:15,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:15,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:15,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:15,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:15,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 353 transitions, 5344 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:15,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:15,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:15,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:18,248 INFO L124 PetriNetUnfolderBase]: 6743/10518 cut-off events. [2024-06-27 19:01:18,248 INFO L125 PetriNetUnfolderBase]: For 300115/300117 co-relation queries the response was YES. [2024-06-27 19:01:18,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65113 conditions, 10518 events. 6743/10518 cut-off events. For 300115/300117 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 67156 event pairs, 1523 based on Foata normal form. 1/10513 useless extension candidates. Maximal degree in co-relation 64989. Up to 8462 conditions per place. [2024-06-27 19:01:18,384 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 247 selfloop transitions, 168 changer transitions 0/422 dead transitions. [2024-06-27 19:01:18,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 422 transitions, 6842 flow [2024-06-27 19:01:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:01:18,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 19:01:18,385 INFO L175 Difference]: Start difference. First operand has 255 places, 353 transitions, 5344 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:01:18,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 422 transitions, 6842 flow [2024-06-27 19:01:19,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 422 transitions, 6711 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 19:01:19,248 INFO L231 Difference]: Finished difference. Result has 261 places, 362 transitions, 5861 flow [2024-06-27 19:01:19,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5861, PETRI_PLACES=261, PETRI_TRANSITIONS=362} [2024-06-27 19:01:19,248 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-06-27 19:01:19,248 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 362 transitions, 5861 flow [2024-06-27 19:01:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:19,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:19,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:19,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:01:19,252 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:19,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:19,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1421594483, now seen corresponding path program 1 times [2024-06-27 19:01:19,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:19,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584296942] [2024-06-27 19:01:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:19,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:21,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:21,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584296942] [2024-06-27 19:01:21,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584296942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:21,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:21,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:21,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606160558] [2024-06-27 19:01:21,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:21,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:21,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:21,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:21,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 362 transitions, 5861 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:21,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:21,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:21,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:24,504 INFO L124 PetriNetUnfolderBase]: 6818/10687 cut-off events. [2024-06-27 19:01:24,505 INFO L125 PetriNetUnfolderBase]: For 324876/324884 co-relation queries the response was YES. [2024-06-27 19:01:24,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69367 conditions, 10687 events. 6818/10687 cut-off events. For 324876/324884 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 68766 event pairs, 1536 based on Foata normal form. 9/10691 useless extension candidates. Maximal degree in co-relation 69239. Up to 9306 conditions per place. [2024-06-27 19:01:24,621 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 321 selfloop transitions, 95 changer transitions 0/423 dead transitions. [2024-06-27 19:01:24,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 423 transitions, 7317 flow [2024-06-27 19:01:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:01:24,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 19:01:24,624 INFO L175 Difference]: Start difference. First operand has 261 places, 362 transitions, 5861 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:01:24,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 423 transitions, 7317 flow [2024-06-27 19:01:25,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 423 transitions, 7151 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 19:01:25,543 INFO L231 Difference]: Finished difference. Result has 265 places, 371 transitions, 6064 flow [2024-06-27 19:01:25,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6064, PETRI_PLACES=265, PETRI_TRANSITIONS=371} [2024-06-27 19:01:25,544 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 214 predicate places. [2024-06-27 19:01:25,544 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 371 transitions, 6064 flow [2024-06-27 19:01:25,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:25,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:25,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:25,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:01:25,545 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:25,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:25,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1620356577, now seen corresponding path program 3 times [2024-06-27 19:01:25,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:25,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216424395] [2024-06-27 19:01:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:28,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:28,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216424395] [2024-06-27 19:01:28,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216424395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:28,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:28,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:28,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693895670] [2024-06-27 19:01:28,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:28,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:28,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:28,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:28,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:28,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 371 transitions, 6064 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:28,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:28,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:28,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:30,873 INFO L124 PetriNetUnfolderBase]: 6841/10662 cut-off events. [2024-06-27 19:01:30,874 INFO L125 PetriNetUnfolderBase]: For 327169/327171 co-relation queries the response was YES. [2024-06-27 19:01:30,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68639 conditions, 10662 events. 6841/10662 cut-off events. For 327169/327171 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 68046 event pairs, 1526 based on Foata normal form. 1/10657 useless extension candidates. Maximal degree in co-relation 68509. Up to 8530 conditions per place. [2024-06-27 19:01:31,017 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 246 selfloop transitions, 177 changer transitions 0/430 dead transitions. [2024-06-27 19:01:31,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 430 transitions, 7466 flow [2024-06-27 19:01:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:01:31,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 19:01:31,019 INFO L175 Difference]: Start difference. First operand has 265 places, 371 transitions, 6064 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:01:31,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 430 transitions, 7466 flow [2024-06-27 19:01:32,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 430 transitions, 7309 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 19:01:32,075 INFO L231 Difference]: Finished difference. Result has 270 places, 374 transitions, 6319 flow [2024-06-27 19:01:32,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5907, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6319, PETRI_PLACES=270, PETRI_TRANSITIONS=374} [2024-06-27 19:01:32,076 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 219 predicate places. [2024-06-27 19:01:32,076 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 374 transitions, 6319 flow [2024-06-27 19:01:32,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:32,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:32,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:32,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:01:32,076 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:32,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1620356391, now seen corresponding path program 2 times [2024-06-27 19:01:32,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:32,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523293898] [2024-06-27 19:01:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:32,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:34,907 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 19:01:34,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:34,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523293898] [2024-06-27 19:01:34,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523293898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:34,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:34,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:34,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002779615] [2024-06-27 19:01:34,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:34,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:34,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:34,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:34,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:34,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:34,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 374 transitions, 6319 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:34,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:34,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:34,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:38,103 INFO L124 PetriNetUnfolderBase]: 6864/10797 cut-off events. [2024-06-27 19:01:38,103 INFO L125 PetriNetUnfolderBase]: For 339314/339322 co-relation queries the response was YES. [2024-06-27 19:01:38,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69732 conditions, 10797 events. 6864/10797 cut-off events. For 339314/339322 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 69823 event pairs, 1608 based on Foata normal form. 9/10801 useless extension candidates. Maximal degree in co-relation 69601. Up to 9361 conditions per place. [2024-06-27 19:01:38,226 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 325 selfloop transitions, 103 changer transitions 0/435 dead transitions. [2024-06-27 19:01:38,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 435 transitions, 7603 flow [2024-06-27 19:01:38,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:01:38,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 19:01:38,228 INFO L175 Difference]: Start difference. First operand has 270 places, 374 transitions, 6319 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:01:38,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 435 transitions, 7603 flow [2024-06-27 19:01:39,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 435 transitions, 7272 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:39,144 INFO L231 Difference]: Finished difference. Result has 273 places, 377 transitions, 6255 flow [2024-06-27 19:01:39,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5992, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6255, PETRI_PLACES=273, PETRI_TRANSITIONS=377} [2024-06-27 19:01:39,144 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 222 predicate places. [2024-06-27 19:01:39,145 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 377 transitions, 6255 flow [2024-06-27 19:01:39,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:39,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:39,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:39,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:01:39,145 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:39,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1620356205, now seen corresponding path program 1 times [2024-06-27 19:01:39,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:39,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029627527] [2024-06-27 19:01:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:39,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:41,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:41,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029627527] [2024-06-27 19:01:41,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029627527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:41,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:41,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:41,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871253226] [2024-06-27 19:01:41,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:41,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:41,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:41,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:41,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:41,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:41,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 377 transitions, 6255 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:41,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:41,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:41,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:44,699 INFO L124 PetriNetUnfolderBase]: 7066/11070 cut-off events. [2024-06-27 19:01:44,700 INFO L125 PetriNetUnfolderBase]: For 362995/363003 co-relation queries the response was YES. [2024-06-27 19:01:44,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71682 conditions, 11070 events. 7066/11070 cut-off events. For 362995/363003 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 71355 event pairs, 1614 based on Foata normal form. 10/11075 useless extension candidates. Maximal degree in co-relation 71550. Up to 9281 conditions per place. [2024-06-27 19:01:44,855 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 342 selfloop transitions, 121 changer transitions 0/470 dead transitions. [2024-06-27 19:01:44,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 470 transitions, 8112 flow [2024-06-27 19:01:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:01:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:01:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-27 19:01:44,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276595744680851 [2024-06-27 19:01:44,857 INFO L175 Difference]: Start difference. First operand has 273 places, 377 transitions, 6255 flow. Second operand 10 states and 248 transitions. [2024-06-27 19:01:44,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 470 transitions, 8112 flow [2024-06-27 19:01:45,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 470 transitions, 7886 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:01:45,885 INFO L231 Difference]: Finished difference. Result has 279 places, 395 transitions, 6590 flow [2024-06-27 19:01:45,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6029, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6590, PETRI_PLACES=279, PETRI_TRANSITIONS=395} [2024-06-27 19:01:45,886 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 228 predicate places. [2024-06-27 19:01:45,886 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 395 transitions, 6590 flow [2024-06-27 19:01:45,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:45,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:45,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:45,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:01:45,886 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:45,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2135093205, now seen corresponding path program 2 times [2024-06-27 19:01:45,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:45,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109850339] [2024-06-27 19:01:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:45,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:48,495 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 19:01:48,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:48,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109850339] [2024-06-27 19:01:48,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109850339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:48,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:48,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:48,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533875795] [2024-06-27 19:01:48,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:48,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:48,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:48,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:48,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 395 transitions, 6590 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:48,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:48,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:48,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:51,684 INFO L124 PetriNetUnfolderBase]: 7396/11653 cut-off events. [2024-06-27 19:01:51,685 INFO L125 PetriNetUnfolderBase]: For 417276/417278 co-relation queries the response was YES. [2024-06-27 19:01:51,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78734 conditions, 11653 events. 7396/11653 cut-off events. For 417276/417278 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 75838 event pairs, 1856 based on Foata normal form. 4/11655 useless extension candidates. Maximal degree in co-relation 78599. Up to 9828 conditions per place. [2024-06-27 19:01:51,819 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 388 selfloop transitions, 119 changer transitions 0/514 dead transitions. [2024-06-27 19:01:51,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 514 transitions, 9052 flow [2024-06-27 19:01:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:01:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:01:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 268 transitions. [2024-06-27 19:01:51,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183752417794971 [2024-06-27 19:01:51,821 INFO L175 Difference]: Start difference. First operand has 279 places, 395 transitions, 6590 flow. Second operand 11 states and 268 transitions. [2024-06-27 19:01:51,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 514 transitions, 9052 flow [2024-06-27 19:01:53,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 514 transitions, 8728 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:53,207 INFO L231 Difference]: Finished difference. Result has 287 places, 434 transitions, 7440 flow [2024-06-27 19:01:53,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6347, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7440, PETRI_PLACES=287, PETRI_TRANSITIONS=434} [2024-06-27 19:01:53,208 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 236 predicate places. [2024-06-27 19:01:53,208 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 434 transitions, 7440 flow [2024-06-27 19:01:53,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:01:53,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:53,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:53,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:01:53,209 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:53,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:53,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1987384387, now seen corresponding path program 3 times [2024-06-27 19:01:53,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:53,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287505489] [2024-06-27 19:01:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:53,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:55,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:55,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287505489] [2024-06-27 19:01:55,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287505489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:55,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:55,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:55,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530778809] [2024-06-27 19:01:55,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:55,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:55,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:55,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:55,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:55,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:55,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 434 transitions, 7440 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:55,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:55,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:55,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:58,648 INFO L124 PetriNetUnfolderBase]: 7393/11656 cut-off events. [2024-06-27 19:01:58,648 INFO L125 PetriNetUnfolderBase]: For 431966/431968 co-relation queries the response was YES. [2024-06-27 19:01:58,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80972 conditions, 11656 events. 7393/11656 cut-off events. For 431966/431968 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 76024 event pairs, 1902 based on Foata normal form. 1/11655 useless extension candidates. Maximal degree in co-relation 80833. Up to 10274 conditions per place. [2024-06-27 19:01:58,815 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 380 selfloop transitions, 99 changer transitions 0/486 dead transitions. [2024-06-27 19:01:58,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 486 transitions, 8690 flow [2024-06-27 19:01:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:01:58,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132978723404256 [2024-06-27 19:01:58,817 INFO L175 Difference]: Start difference. First operand has 287 places, 434 transitions, 7440 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:01:58,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 486 transitions, 8690 flow [2024-06-27 19:02:00,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 486 transitions, 8346 flow, removed 102 selfloop flow, removed 7 redundant places. [2024-06-27 19:02:00,489 INFO L231 Difference]: Finished difference. Result has 288 places, 434 transitions, 7335 flow [2024-06-27 19:02:00,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7114, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7335, PETRI_PLACES=288, PETRI_TRANSITIONS=434} [2024-06-27 19:02:00,490 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 237 predicate places. [2024-06-27 19:02:00,490 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 434 transitions, 7335 flow [2024-06-27 19:02:00,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:00,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:00,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:00,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:02:00,490 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:00,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1244105657, now seen corresponding path program 3 times [2024-06-27 19:02:00,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:00,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816378181] [2024-06-27 19:02:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:00,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:03,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:03,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816378181] [2024-06-27 19:02:03,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816378181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:03,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:03,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:03,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032926038] [2024-06-27 19:02:03,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:03,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:03,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:03,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:03,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 434 transitions, 7335 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:02:03,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:03,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:03,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:06,418 INFO L124 PetriNetUnfolderBase]: 7381/11624 cut-off events. [2024-06-27 19:02:06,419 INFO L125 PetriNetUnfolderBase]: For 429366/429368 co-relation queries the response was YES. [2024-06-27 19:02:06,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80202 conditions, 11624 events. 7381/11624 cut-off events. For 429366/429368 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 75594 event pairs, 1858 based on Foata normal form. 4/11626 useless extension candidates. Maximal degree in co-relation 80061. Up to 9820 conditions per place. [2024-06-27 19:02:06,579 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 388 selfloop transitions, 119 changer transitions 0/514 dead transitions. [2024-06-27 19:02:06,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 514 transitions, 8918 flow [2024-06-27 19:02:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:02:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:02:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-27 19:02:06,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145067698259188 [2024-06-27 19:02:06,583 INFO L175 Difference]: Start difference. First operand has 288 places, 434 transitions, 7335 flow. Second operand 11 states and 266 transitions. [2024-06-27 19:02:06,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 514 transitions, 8918 flow [2024-06-27 19:02:08,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 514 transitions, 8610 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 19:02:08,325 INFO L231 Difference]: Finished difference. Result has 293 places, 439 transitions, 7422 flow [2024-06-27 19:02:08,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7045, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7422, PETRI_PLACES=293, PETRI_TRANSITIONS=439} [2024-06-27 19:02:08,326 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 242 predicate places. [2024-06-27 19:02:08,326 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 439 transitions, 7422 flow [2024-06-27 19:02:08,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:02:08,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:08,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:08,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:02:08,327 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:08,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:08,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1244343179, now seen corresponding path program 4 times [2024-06-27 19:02:08,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:08,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014845050] [2024-06-27 19:02:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:08,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:11,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:11,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014845050] [2024-06-27 19:02:11,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014845050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:11,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:11,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:11,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505736107] [2024-06-27 19:02:11,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:11,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:11,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:11,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:11,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:11,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:11,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 439 transitions, 7422 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:02:11,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:11,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:11,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:14,454 INFO L124 PetriNetUnfolderBase]: 7430/11732 cut-off events. [2024-06-27 19:02:14,454 INFO L125 PetriNetUnfolderBase]: For 433675/433677 co-relation queries the response was YES. [2024-06-27 19:02:14,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81018 conditions, 11732 events. 7430/11732 cut-off events. For 433675/433677 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 76771 event pairs, 1906 based on Foata normal form. 1/11731 useless extension candidates. Maximal degree in co-relation 80875. Up to 10281 conditions per place. [2024-06-27 19:02:14,607 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 391 selfloop transitions, 106 changer transitions 0/504 dead transitions. [2024-06-27 19:02:14,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 504 transitions, 8972 flow [2024-06-27 19:02:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:02:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:02:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:02:14,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508274231678487 [2024-06-27 19:02:14,609 INFO L175 Difference]: Start difference. First operand has 293 places, 439 transitions, 7422 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:02:14,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 504 transitions, 8972 flow [2024-06-27 19:02:16,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 504 transitions, 8754 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:16,261 INFO L231 Difference]: Finished difference. Result has 297 places, 445 transitions, 7567 flow [2024-06-27 19:02:16,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7204, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7567, PETRI_PLACES=297, PETRI_TRANSITIONS=445} [2024-06-27 19:02:16,263 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 246 predicate places. [2024-06-27 19:02:16,263 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 445 transitions, 7567 flow [2024-06-27 19:02:16,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:02:16,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:16,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:16,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:02:16,264 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:16,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:16,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1244096729, now seen corresponding path program 1 times [2024-06-27 19:02:16,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:16,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790336384] [2024-06-27 19:02:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:16,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:19,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:19,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790336384] [2024-06-27 19:02:19,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790336384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:19,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:19,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:02:19,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571525489] [2024-06-27 19:02:19,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:19,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:02:19,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:19,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:02:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:02:19,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:02:19,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 445 transitions, 7567 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:19,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:19,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:02:19,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:22,860 INFO L124 PetriNetUnfolderBase]: 7194/11402 cut-off events. [2024-06-27 19:02:22,860 INFO L125 PetriNetUnfolderBase]: For 466578/466693 co-relation queries the response was YES. [2024-06-27 19:02:22,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79000 conditions, 11402 events. 7194/11402 cut-off events. For 466578/466693 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 75246 event pairs, 1789 based on Foata normal form. 108/11457 useless extension candidates. Maximal degree in co-relation 78855. Up to 9569 conditions per place. [2024-06-27 19:02:23,000 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 386 selfloop transitions, 82 changer transitions 0/508 dead transitions. [2024-06-27 19:02:23,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 508 transitions, 8806 flow [2024-06-27 19:02:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:02:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:02:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-27 19:02:23,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271867612293144 [2024-06-27 19:02:23,001 INFO L175 Difference]: Start difference. First operand has 297 places, 445 transitions, 7567 flow. Second operand 9 states and 223 transitions. [2024-06-27 19:02:23,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 508 transitions, 8806 flow [2024-06-27 19:02:24,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 508 transitions, 8579 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:24,462 INFO L231 Difference]: Finished difference. Result has 300 places, 447 transitions, 7561 flow [2024-06-27 19:02:24,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7340, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7561, PETRI_PLACES=300, PETRI_TRANSITIONS=447} [2024-06-27 19:02:24,462 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 249 predicate places. [2024-06-27 19:02:24,463 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 447 transitions, 7561 flow [2024-06-27 19:02:24,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:24,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:24,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:24,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:02:24,463 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:24,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash 775085113, now seen corresponding path program 4 times [2024-06-27 19:02:24,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:24,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579176402] [2024-06-27 19:02:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:24,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:27,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:27,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579176402] [2024-06-27 19:02:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579176402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:27,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:27,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:27,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124002038] [2024-06-27 19:02:27,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:27,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:27,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:27,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:27,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:27,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:27,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 447 transitions, 7561 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:27,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:27,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:27,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:30,234 INFO L124 PetriNetUnfolderBase]: 7665/11972 cut-off events. [2024-06-27 19:02:30,235 INFO L125 PetriNetUnfolderBase]: For 467876/467909 co-relation queries the response was YES. [2024-06-27 19:02:30,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83441 conditions, 11972 events. 7665/11972 cut-off events. For 467876/467909 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 77691 event pairs, 1704 based on Foata normal form. 27/11992 useless extension candidates. Maximal degree in co-relation 83295. Up to 10454 conditions per place. [2024-06-27 19:02:30,407 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 394 selfloop transitions, 101 changer transitions 0/502 dead transitions. [2024-06-27 19:02:30,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 502 transitions, 9183 flow [2024-06-27 19:02:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:02:30,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-27 19:02:30,408 INFO L175 Difference]: Start difference. First operand has 300 places, 447 transitions, 7561 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:02:30,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 502 transitions, 9183 flow [2024-06-27 19:02:32,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 502 transitions, 8990 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 19:02:32,162 INFO L231 Difference]: Finished difference. Result has 300 places, 450 transitions, 7639 flow [2024-06-27 19:02:32,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7368, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7639, PETRI_PLACES=300, PETRI_TRANSITIONS=450} [2024-06-27 19:02:32,162 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 249 predicate places. [2024-06-27 19:02:32,163 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 450 transitions, 7639 flow [2024-06-27 19:02:32,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:32,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:32,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:32,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:02:32,163 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:32,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1243056183, now seen corresponding path program 5 times [2024-06-27 19:02:32,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:32,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835894964] [2024-06-27 19:02:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:32,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:34,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:34,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835894964] [2024-06-27 19:02:34,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835894964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:34,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:34,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:34,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837774017] [2024-06-27 19:02:34,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:34,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:34,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:34,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:34,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:34,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:34,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 450 transitions, 7639 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:34,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:34,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:34,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:37,539 INFO L124 PetriNetUnfolderBase]: 7693/12014 cut-off events. [2024-06-27 19:02:37,539 INFO L125 PetriNetUnfolderBase]: For 474278/474311 co-relation queries the response was YES. [2024-06-27 19:02:37,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83568 conditions, 12014 events. 7693/12014 cut-off events. For 474278/474311 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 78002 event pairs, 1706 based on Foata normal form. 27/12034 useless extension candidates. Maximal degree in co-relation 83421. Up to 10482 conditions per place. [2024-06-27 19:02:37,691 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 392 selfloop transitions, 104 changer transitions 0/503 dead transitions. [2024-06-27 19:02:37,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 503 transitions, 9189 flow [2024-06-27 19:02:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:02:37,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-06-27 19:02:37,693 INFO L175 Difference]: Start difference. First operand has 300 places, 450 transitions, 7639 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:02:37,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 503 transitions, 9189 flow [2024-06-27 19:02:39,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 503 transitions, 8755 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 19:02:39,480 INFO L231 Difference]: Finished difference. Result has 301 places, 456 transitions, 7575 flow [2024-06-27 19:02:39,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7237, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7575, PETRI_PLACES=301, PETRI_TRANSITIONS=456} [2024-06-27 19:02:39,480 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 250 predicate places. [2024-06-27 19:02:39,480 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 456 transitions, 7575 flow [2024-06-27 19:02:39,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:39,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:39,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:39,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:02:39,481 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:39,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1892058545, now seen corresponding path program 5 times [2024-06-27 19:02:39,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:39,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191738232] [2024-06-27 19:02:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:41,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:41,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191738232] [2024-06-27 19:02:41,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191738232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:41,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:41,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:41,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243774297] [2024-06-27 19:02:41,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:41,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:41,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:41,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:41,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:41,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 456 transitions, 7575 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:02:41,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:41,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:41,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:45,307 INFO L124 PetriNetUnfolderBase]: 7716/11885 cut-off events. [2024-06-27 19:02:45,308 INFO L125 PetriNetUnfolderBase]: For 480985/480993 co-relation queries the response was YES. [2024-06-27 19:02:45,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83417 conditions, 11885 events. 7716/11885 cut-off events. For 480985/480993 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 75701 event pairs, 1756 based on Foata normal form. 3/11868 useless extension candidates. Maximal degree in co-relation 83271. Up to 9633 conditions per place. [2024-06-27 19:02:45,500 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 296 selfloop transitions, 217 changer transitions 0/520 dead transitions. [2024-06-27 19:02:45,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 520 transitions, 9507 flow [2024-06-27 19:02:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:02:45,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 19:02:45,501 INFO L175 Difference]: Start difference. First operand has 301 places, 456 transitions, 7575 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:02:45,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 520 transitions, 9507 flow [2024-06-27 19:02:47,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 520 transitions, 9342 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 19:02:47,583 INFO L231 Difference]: Finished difference. Result has 306 places, 462 transitions, 8012 flow [2024-06-27 19:02:47,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7410, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8012, PETRI_PLACES=306, PETRI_TRANSITIONS=462} [2024-06-27 19:02:47,584 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 255 predicate places. [2024-06-27 19:02:47,584 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 462 transitions, 8012 flow [2024-06-27 19:02:47,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:02:47,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:47,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:47,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:02:47,584 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:47,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash -719659907, now seen corresponding path program 6 times [2024-06-27 19:02:47,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:47,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913673979] [2024-06-27 19:02:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:50,489 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 19:02:50,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913673979] [2024-06-27 19:02:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913673979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:50,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:50,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:50,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867731735] [2024-06-27 19:02:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:50,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:50,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:50,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:50,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 462 transitions, 8012 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:02:50,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:50,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:50,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:54,354 INFO L124 PetriNetUnfolderBase]: 7739/11910 cut-off events. [2024-06-27 19:02:54,355 INFO L125 PetriNetUnfolderBase]: For 502293/502301 co-relation queries the response was YES. [2024-06-27 19:02:54,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84999 conditions, 11910 events. 7739/11910 cut-off events. For 502293/502301 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 75726 event pairs, 1747 based on Foata normal form. 3/11893 useless extension candidates. Maximal degree in co-relation 84852. Up to 9649 conditions per place. [2024-06-27 19:02:54,564 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 294 selfloop transitions, 218 changer transitions 0/519 dead transitions. [2024-06-27 19:02:54,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 519 transitions, 9862 flow [2024-06-27 19:02:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:02:54,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:02:54,566 INFO L175 Difference]: Start difference. First operand has 306 places, 462 transitions, 8012 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:02:54,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 519 transitions, 9862 flow [2024-06-27 19:02:56,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 519 transitions, 9541 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:56,538 INFO L231 Difference]: Finished difference. Result has 309 places, 465 transitions, 8219 flow [2024-06-27 19:02:56,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7717, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8219, PETRI_PLACES=309, PETRI_TRANSITIONS=465} [2024-06-27 19:02:56,539 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 258 predicate places. [2024-06-27 19:02:56,539 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 465 transitions, 8219 flow [2024-06-27 19:02:56,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:02:56,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:56,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:56,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:02:56,540 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:56,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1627697193, now seen corresponding path program 6 times [2024-06-27 19:02:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:56,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136958788] [2024-06-27 19:02:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:56,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:59,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:59,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136958788] [2024-06-27 19:02:59,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136958788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:59,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:59,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:59,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020887506] [2024-06-27 19:02:59,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:59,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:59,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:59,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:59,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:59,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:59,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 465 transitions, 8219 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:02:59,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:59,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:59,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:02,832 INFO L124 PetriNetUnfolderBase]: 7762/12131 cut-off events. [2024-06-27 19:03:02,833 INFO L125 PetriNetUnfolderBase]: For 506834/506850 co-relation queries the response was YES. [2024-06-27 19:03:02,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85413 conditions, 12131 events. 7762/12131 cut-off events. For 506834/506850 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 78912 event pairs, 1776 based on Foata normal form. 15/12137 useless extension candidates. Maximal degree in co-relation 85265. Up to 10568 conditions per place. [2024-06-27 19:03:02,987 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 396 selfloop transitions, 123 changer transitions 0/526 dead transitions. [2024-06-27 19:03:02,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 526 transitions, 9811 flow [2024-06-27 19:03:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:03:02,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:03:02,989 INFO L175 Difference]: Start difference. First operand has 309 places, 465 transitions, 8219 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:03:02,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 526 transitions, 9811 flow [2024-06-27 19:03:05,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 526 transitions, 9363 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:05,035 INFO L231 Difference]: Finished difference. Result has 312 places, 468 transitions, 8086 flow [2024-06-27 19:03:05,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7775, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8086, PETRI_PLACES=312, PETRI_TRANSITIONS=468} [2024-06-27 19:03:05,035 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 261 predicate places. [2024-06-27 19:03:05,036 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 468 transitions, 8086 flow [2024-06-27 19:03:05,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:05,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:05,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:05,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:03:05,036 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:05,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:05,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1298191849, now seen corresponding path program 4 times [2024-06-27 19:03:05,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:05,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095471634] [2024-06-27 19:03:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:05,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:07,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:07,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095471634] [2024-06-27 19:03:07,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095471634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:07,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:07,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:07,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521778740] [2024-06-27 19:03:07,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:07,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:07,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:07,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:07,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:07,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:07,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 468 transitions, 8086 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:07,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:07,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:07,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:11,503 INFO L124 PetriNetUnfolderBase]: 7808/12174 cut-off events. [2024-06-27 19:03:11,504 INFO L125 PetriNetUnfolderBase]: For 516236/516252 co-relation queries the response was YES. [2024-06-27 19:03:11,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85333 conditions, 12174 events. 7808/12174 cut-off events. For 516236/516252 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 78969 event pairs, 1781 based on Foata normal form. 16/12181 useless extension candidates. Maximal degree in co-relation 85184. Up to 10563 conditions per place. [2024-06-27 19:03:11,750 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 404 selfloop transitions, 131 changer transitions 0/542 dead transitions. [2024-06-27 19:03:11,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 542 transitions, 9959 flow [2024-06-27 19:03:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:03:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:03:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 19:03:11,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153664302600472 [2024-06-27 19:03:11,752 INFO L175 Difference]: Start difference. First operand has 312 places, 468 transitions, 8086 flow. Second operand 9 states and 218 transitions. [2024-06-27 19:03:11,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 542 transitions, 9959 flow [2024-06-27 19:03:13,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 542 transitions, 9788 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:13,989 INFO L231 Difference]: Finished difference. Result has 316 places, 476 transitions, 8366 flow [2024-06-27 19:03:13,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7915, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8366, PETRI_PLACES=316, PETRI_TRANSITIONS=476} [2024-06-27 19:03:13,989 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 265 predicate places. [2024-06-27 19:03:13,989 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 476 transitions, 8366 flow [2024-06-27 19:03:13,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:13,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:13,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:13,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:03:13,990 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:13,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:13,990 INFO L85 PathProgramCache]: Analyzing trace with hash 901567159, now seen corresponding path program 5 times [2024-06-27 19:03:13,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:13,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057516526] [2024-06-27 19:03:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:13,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:16,525 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 19:03:16,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:16,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057516526] [2024-06-27 19:03:16,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057516526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:16,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:16,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:16,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383029307] [2024-06-27 19:03:16,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:16,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:16,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:16,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:16,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 476 transitions, 8366 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:16,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:16,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:16,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:20,167 INFO L124 PetriNetUnfolderBase]: 7854/12243 cut-off events. [2024-06-27 19:03:20,167 INFO L125 PetriNetUnfolderBase]: For 537028/537044 co-relation queries the response was YES. [2024-06-27 19:03:20,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86487 conditions, 12243 events. 7854/12243 cut-off events. For 537028/537044 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 79415 event pairs, 1779 based on Foata normal form. 16/12250 useless extension candidates. Maximal degree in co-relation 86336. Up to 10664 conditions per place. [2024-06-27 19:03:20,336 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 401 selfloop transitions, 126 changer transitions 0/534 dead transitions. [2024-06-27 19:03:20,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 534 transitions, 9966 flow [2024-06-27 19:03:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:03:20,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-27 19:03:20,337 INFO L175 Difference]: Start difference. First operand has 316 places, 476 transitions, 8366 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:03:20,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 534 transitions, 9966 flow [2024-06-27 19:03:22,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 534 transitions, 9683 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:22,500 INFO L231 Difference]: Finished difference. Result has 319 places, 480 transitions, 8445 flow [2024-06-27 19:03:22,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8109, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8445, PETRI_PLACES=319, PETRI_TRANSITIONS=480} [2024-06-27 19:03:22,500 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 268 predicate places. [2024-06-27 19:03:22,500 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 480 transitions, 8445 flow [2024-06-27 19:03:22,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:22,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:22,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:22,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:03:22,501 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:22,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:22,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1652870599, now seen corresponding path program 6 times [2024-06-27 19:03:22,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:22,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769504161] [2024-06-27 19:03:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:22,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:24,737 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 19:03:24,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:24,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769504161] [2024-06-27 19:03:24,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769504161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:24,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:24,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:24,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319063793] [2024-06-27 19:03:24,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:24,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:24,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:24,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:24,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:24,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:24,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 480 transitions, 8445 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:24,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:24,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:24,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:28,340 INFO L124 PetriNetUnfolderBase]: 7920/12328 cut-off events. [2024-06-27 19:03:28,340 INFO L125 PetriNetUnfolderBase]: For 546120/546136 co-relation queries the response was YES. [2024-06-27 19:03:28,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87561 conditions, 12328 events. 7920/12328 cut-off events. For 546120/546136 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 79891 event pairs, 1832 based on Foata normal form. 16/12335 useless extension candidates. Maximal degree in co-relation 87408. Up to 9644 conditions per place. [2024-06-27 19:03:28,581 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 395 selfloop transitions, 155 changer transitions 0/557 dead transitions. [2024-06-27 19:03:28,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 557 transitions, 10502 flow [2024-06-27 19:03:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:03:28,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526595744680851 [2024-06-27 19:03:28,582 INFO L175 Difference]: Start difference. First operand has 319 places, 480 transitions, 8445 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:03:28,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 557 transitions, 10502 flow [2024-06-27 19:03:31,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 557 transitions, 10205 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:03:31,028 INFO L231 Difference]: Finished difference. Result has 323 places, 497 transitions, 8913 flow [2024-06-27 19:03:31,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8148, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8913, PETRI_PLACES=323, PETRI_TRANSITIONS=497} [2024-06-27 19:03:31,028 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 272 predicate places. [2024-06-27 19:03:31,028 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 497 transitions, 8913 flow [2024-06-27 19:03:31,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:31,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:31,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:31,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:03:31,029 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:31,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:31,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1652454517, now seen corresponding path program 7 times [2024-06-27 19:03:31,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:31,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335490501] [2024-06-27 19:03:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:31,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:33,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:33,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335490501] [2024-06-27 19:03:33,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335490501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:33,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:33,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326495849] [2024-06-27 19:03:33,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:33,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:33,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:33,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:33,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:33,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:33,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 497 transitions, 8913 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:33,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:33,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:33,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:37,050 INFO L124 PetriNetUnfolderBase]: 7943/12194 cut-off events. [2024-06-27 19:03:37,050 INFO L125 PetriNetUnfolderBase]: For 566799/566807 co-relation queries the response was YES. [2024-06-27 19:03:37,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90205 conditions, 12194 events. 7943/12194 cut-off events. For 566799/566807 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 77385 event pairs, 1742 based on Foata normal form. 3/12177 useless extension candidates. Maximal degree in co-relation 90049. Up to 9895 conditions per place. [2024-06-27 19:03:37,319 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 317 selfloop transitions, 225 changer transitions 0/549 dead transitions. [2024-06-27 19:03:37,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 549 transitions, 10664 flow [2024-06-27 19:03:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:03:37,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:03:37,336 INFO L175 Difference]: Start difference. First operand has 323 places, 497 transitions, 8913 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:03:37,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 549 transitions, 10664 flow [2024-06-27 19:03:39,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 549 transitions, 10521 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-27 19:03:39,647 INFO L231 Difference]: Finished difference. Result has 329 places, 500 transitions, 9289 flow [2024-06-27 19:03:39,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8770, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9289, PETRI_PLACES=329, PETRI_TRANSITIONS=500} [2024-06-27 19:03:39,648 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 278 predicate places. [2024-06-27 19:03:39,648 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 500 transitions, 9289 flow [2024-06-27 19:03:39,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:39,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:39,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:39,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:03:39,648 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:39,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1433128731, now seen corresponding path program 7 times [2024-06-27 19:03:39,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:39,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712367071] [2024-06-27 19:03:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:39,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:42,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:42,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712367071] [2024-06-27 19:03:42,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712367071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:42,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:42,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:42,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725169716] [2024-06-27 19:03:42,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:42,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:42,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:42,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:42,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:42,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 500 transitions, 9289 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:42,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:42,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:42,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:46,478 INFO L124 PetriNetUnfolderBase]: 7940/12405 cut-off events. [2024-06-27 19:03:46,478 INFO L125 PetriNetUnfolderBase]: For 567542/567558 co-relation queries the response was YES. [2024-06-27 19:03:46,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90852 conditions, 12405 events. 7940/12405 cut-off events. For 567542/567558 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 80865 event pairs, 1763 based on Foata normal form. 15/12411 useless extension candidates. Maximal degree in co-relation 90693. Up to 10810 conditions per place. [2024-06-27 19:03:46,669 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 438 selfloop transitions, 124 changer transitions 0/569 dead transitions. [2024-06-27 19:03:46,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 569 transitions, 11162 flow [2024-06-27 19:03:46,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:03:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:03:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-27 19:03:46,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4978723404255319 [2024-06-27 19:03:46,671 INFO L175 Difference]: Start difference. First operand has 329 places, 500 transitions, 9289 flow. Second operand 10 states and 234 transitions. [2024-06-27 19:03:46,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 569 transitions, 11162 flow [2024-06-27 19:03:49,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 569 transitions, 10772 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:49,174 INFO L231 Difference]: Finished difference. Result has 334 places, 500 transitions, 9153 flow [2024-06-27 19:03:49,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8899, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9153, PETRI_PLACES=334, PETRI_TRANSITIONS=500} [2024-06-27 19:03:49,180 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 283 predicate places. [2024-06-27 19:03:49,181 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 500 transitions, 9153 flow [2024-06-27 19:03:49,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:49,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:49,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:49,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:03:49,181 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:49,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1579285365, now seen corresponding path program 8 times [2024-06-27 19:03:49,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:49,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092897563] [2024-06-27 19:03:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:49,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:51,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:51,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092897563] [2024-06-27 19:03:51,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092897563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:51,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:51,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:51,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500414549] [2024-06-27 19:03:51,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:51,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:51,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:51,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:51,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 500 transitions, 9153 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:51,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:51,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:51,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:55,138 INFO L124 PetriNetUnfolderBase]: 7937/12402 cut-off events. [2024-06-27 19:03:55,139 INFO L125 PetriNetUnfolderBase]: For 569202/569218 co-relation queries the response was YES. [2024-06-27 19:03:55,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90172 conditions, 12402 events. 7937/12402 cut-off events. For 569202/569218 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 80906 event pairs, 1771 based on Foata normal form. 15/12408 useless extension candidates. Maximal degree in co-relation 90012. Up to 10807 conditions per place. [2024-06-27 19:03:55,375 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 425 selfloop transitions, 122 changer transitions 0/554 dead transitions. [2024-06-27 19:03:55,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 554 transitions, 10738 flow [2024-06-27 19:03:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:03:55,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-27 19:03:55,378 INFO L175 Difference]: Start difference. First operand has 334 places, 500 transitions, 9153 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:03:55,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 554 transitions, 10738 flow [2024-06-27 19:03:58,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 554 transitions, 10425 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 19:03:58,882 INFO L231 Difference]: Finished difference. Result has 334 places, 500 transitions, 9091 flow [2024-06-27 19:03:58,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8840, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9091, PETRI_PLACES=334, PETRI_TRANSITIONS=500} [2024-06-27 19:03:58,883 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 283 predicate places. [2024-06-27 19:03:58,883 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 500 transitions, 9091 flow [2024-06-27 19:03:58,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:03:58,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:58,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:58,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:03:58,884 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:58,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:58,884 INFO L85 PathProgramCache]: Analyzing trace with hash 541543595, now seen corresponding path program 7 times [2024-06-27 19:03:58,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:58,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087614324] [2024-06-27 19:03:58,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:58,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:01,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087614324] [2024-06-27 19:04:01,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087614324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:01,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:01,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:01,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392474234] [2024-06-27 19:04:01,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:01,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:01,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:01,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 500 transitions, 9091 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:04:01,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:01,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:01,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:05,361 INFO L124 PetriNetUnfolderBase]: 8319/12850 cut-off events. [2024-06-27 19:04:05,361 INFO L125 PetriNetUnfolderBase]: For 625777/625785 co-relation queries the response was YES. [2024-06-27 19:04:05,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94701 conditions, 12850 events. 8319/12850 cut-off events. For 625777/625785 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 82935 event pairs, 1468 based on Foata normal form. 6/12848 useless extension candidates. Maximal degree in co-relation 94542. Up to 9821 conditions per place. [2024-06-27 19:04:05,557 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 373 selfloop transitions, 218 changer transitions 0/598 dead transitions. [2024-06-27 19:04:05,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 598 transitions, 11708 flow [2024-06-27 19:04:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:04:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:04:05,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-27 19:04:05,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297872340425532 [2024-06-27 19:04:05,559 INFO L175 Difference]: Start difference. First operand has 334 places, 500 transitions, 9091 flow. Second operand 10 states and 249 transitions. [2024-06-27 19:04:05,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 598 transitions, 11708 flow [2024-06-27 19:04:08,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 598 transitions, 11464 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:04:08,655 INFO L231 Difference]: Finished difference. Result has 339 places, 524 transitions, 9828 flow [2024-06-27 19:04:08,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9828, PETRI_PLACES=339, PETRI_TRANSITIONS=524} [2024-06-27 19:04:08,655 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 288 predicate places. [2024-06-27 19:04:08,656 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 524 transitions, 9828 flow [2024-06-27 19:04:08,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:04:08,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:08,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:08,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:04:08,657 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:08,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1599572705, now seen corresponding path program 8 times [2024-06-27 19:04:08,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:08,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423691709] [2024-06-27 19:04:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:08,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:11,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:11,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423691709] [2024-06-27 19:04:11,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423691709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:11,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:11,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:11,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886895414] [2024-06-27 19:04:11,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:11,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:11,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:11,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:11,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 524 transitions, 9828 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:04:11,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:11,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:11,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:14,667 INFO L124 PetriNetUnfolderBase]: 8489/13112 cut-off events. [2024-06-27 19:04:14,667 INFO L125 PetriNetUnfolderBase]: For 671481/671489 co-relation queries the response was YES. [2024-06-27 19:04:14,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100846 conditions, 13112 events. 8489/13112 cut-off events. For 671481/671489 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 84838 event pairs, 1543 based on Foata normal form. 4/13108 useless extension candidates. Maximal degree in co-relation 100684. Up to 9907 conditions per place. [2024-06-27 19:04:14,956 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 371 selfloop transitions, 226 changer transitions 0/604 dead transitions. [2024-06-27 19:04:14,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 604 transitions, 12342 flow [2024-06-27 19:04:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:04:14,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-27 19:04:14,958 INFO L175 Difference]: Start difference. First operand has 339 places, 524 transitions, 9828 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:04:14,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 604 transitions, 12342 flow [2024-06-27 19:04:19,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 604 transitions, 11895 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-06-27 19:04:19,018 INFO L231 Difference]: Finished difference. Result has 343 places, 540 transitions, 10295 flow [2024-06-27 19:04:19,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9433, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10295, PETRI_PLACES=343, PETRI_TRANSITIONS=540} [2024-06-27 19:04:19,020 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 292 predicate places. [2024-06-27 19:04:19,020 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 540 transitions, 10295 flow [2024-06-27 19:04:19,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:04:19,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:19,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:19,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:04:19,021 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:19,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:19,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1198778045, now seen corresponding path program 9 times [2024-06-27 19:04:19,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:19,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896560308] [2024-06-27 19:04:19,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:19,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:21,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:21,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896560308] [2024-06-27 19:04:21,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896560308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:21,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:21,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:21,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414894729] [2024-06-27 19:04:21,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:21,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:21,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:21,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:21,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:21,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:21,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 540 transitions, 10295 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:04:21,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:21,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:21,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:25,562 INFO L124 PetriNetUnfolderBase]: 8483/13097 cut-off events. [2024-06-27 19:04:25,562 INFO L125 PetriNetUnfolderBase]: For 677071/677079 co-relation queries the response was YES. [2024-06-27 19:04:25,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101452 conditions, 13097 events. 8483/13097 cut-off events. For 677071/677079 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 84562 event pairs, 1489 based on Foata normal form. 4/13093 useless extension candidates. Maximal degree in co-relation 101287. Up to 9904 conditions per place. [2024-06-27 19:04:25,777 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 370 selfloop transitions, 230 changer transitions 0/607 dead transitions. [2024-06-27 19:04:25,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 607 transitions, 12491 flow [2024-06-27 19:04:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 19:04:25,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:04:25,783 INFO L175 Difference]: Start difference. First operand has 343 places, 540 transitions, 10295 flow. Second operand 9 states and 225 transitions. [2024-06-27 19:04:25,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 607 transitions, 12491 flow [2024-06-27 19:04:29,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 607 transitions, 12383 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 19:04:29,010 INFO L231 Difference]: Finished difference. Result has 351 places, 542 transitions, 10759 flow [2024-06-27 19:04:29,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10187, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10759, PETRI_PLACES=351, PETRI_TRANSITIONS=542} [2024-06-27 19:04:29,011 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 300 predicate places. [2024-06-27 19:04:29,011 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 542 transitions, 10759 flow [2024-06-27 19:04:29,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:04:29,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:29,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:29,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:04:29,012 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:29,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:29,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1426857941, now seen corresponding path program 9 times [2024-06-27 19:04:29,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:29,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626133902] [2024-06-27 19:04:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:29,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:31,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:31,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626133902] [2024-06-27 19:04:31,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626133902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:31,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:31,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:04:31,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128839994] [2024-06-27 19:04:31,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:31,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:04:31,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:04:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:04:31,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:31,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 542 transitions, 10759 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:31,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:31,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:31,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:35,156 INFO L124 PetriNetUnfolderBase]: 8480/13117 cut-off events. [2024-06-27 19:04:35,156 INFO L125 PetriNetUnfolderBase]: For 686675/686683 co-relation queries the response was YES. [2024-06-27 19:04:35,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103441 conditions, 13117 events. 8480/13117 cut-off events. For 686675/686683 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 84986 event pairs, 1686 based on Foata normal form. 3/13112 useless extension candidates. Maximal degree in co-relation 103273. Up to 11336 conditions per place. [2024-06-27 19:04:35,374 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 422 selfloop transitions, 162 changer transitions 0/591 dead transitions. [2024-06-27 19:04:35,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 591 transitions, 12361 flow [2024-06-27 19:04:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:04:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:04:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:04:35,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501519756838906 [2024-06-27 19:04:35,376 INFO L175 Difference]: Start difference. First operand has 351 places, 542 transitions, 10759 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:04:35,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 591 transitions, 12361 flow [2024-06-27 19:04:39,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 591 transitions, 11809 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 19:04:39,099 INFO L231 Difference]: Finished difference. Result has 351 places, 542 transitions, 10543 flow [2024-06-27 19:04:39,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10207, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10543, PETRI_PLACES=351, PETRI_TRANSITIONS=542} [2024-06-27 19:04:39,100 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 300 predicate places. [2024-06-27 19:04:39,100 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 542 transitions, 10543 flow [2024-06-27 19:04:39,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:39,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:39,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:39,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:04:39,101 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:39,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2007213551, now seen corresponding path program 8 times [2024-06-27 19:04:39,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:39,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935498659] [2024-06-27 19:04:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:39,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:41,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:41,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935498659] [2024-06-27 19:04:41,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935498659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:41,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:41,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:41,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393192546] [2024-06-27 19:04:41,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:41,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:41,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:41,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:41,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:41,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:41,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 542 transitions, 10543 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:04:41,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:41,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:41,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:46,204 INFO L124 PetriNetUnfolderBase]: 8503/13182 cut-off events. [2024-06-27 19:04:46,205 INFO L125 PetriNetUnfolderBase]: For 684666/684674 co-relation queries the response was YES. [2024-06-27 19:04:46,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102745 conditions, 13182 events. 8503/13182 cut-off events. For 684666/684674 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 85739 event pairs, 1713 based on Foata normal form. 3/13177 useless extension candidates. Maximal degree in co-relation 102576. Up to 11113 conditions per place. [2024-06-27 19:04:46,422 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 414 selfloop transitions, 185 changer transitions 0/606 dead transitions. [2024-06-27 19:04:46,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 606 transitions, 12472 flow [2024-06-27 19:04:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:04:46,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 19:04:46,424 INFO L175 Difference]: Start difference. First operand has 351 places, 542 transitions, 10543 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:04:46,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 606 transitions, 12472 flow [2024-06-27 19:04:49,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 606 transitions, 12093 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 19:04:49,437 INFO L231 Difference]: Finished difference. Result has 353 places, 545 transitions, 10702 flow [2024-06-27 19:04:49,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10168, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10702, PETRI_PLACES=353, PETRI_TRANSITIONS=545} [2024-06-27 19:04:49,438 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 302 predicate places. [2024-06-27 19:04:49,438 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 545 transitions, 10702 flow [2024-06-27 19:04:49,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:04:49,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:49,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:49,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:04:49,438 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:49,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:49,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1603989275, now seen corresponding path program 10 times [2024-06-27 19:04:49,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:49,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42583509] [2024-06-27 19:04:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:49,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:52,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:52,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42583509] [2024-06-27 19:04:52,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42583509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:52,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:52,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796795127] [2024-06-27 19:04:52,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:52,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:52,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:52,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:52,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:52,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:52,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 545 transitions, 10702 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:04:52,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:52,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:52,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:57,362 INFO L124 PetriNetUnfolderBase]: 8795/13780 cut-off events. [2024-06-27 19:04:57,362 INFO L125 PetriNetUnfolderBase]: For 712071/712073 co-relation queries the response was YES. [2024-06-27 19:04:57,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106821 conditions, 13780 events. 8795/13780 cut-off events. For 712071/712073 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 91328 event pairs, 1906 based on Foata normal form. 4/13782 useless extension candidates. Maximal degree in co-relation 106651. Up to 10991 conditions per place. [2024-06-27 19:04:57,575 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 417 selfloop transitions, 215 changer transitions 0/639 dead transitions. [2024-06-27 19:04:57,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 639 transitions, 13088 flow [2024-06-27 19:04:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 19:04:57,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484633569739953 [2024-06-27 19:04:57,577 INFO L175 Difference]: Start difference. First operand has 353 places, 545 transitions, 10702 flow. Second operand 9 states and 232 transitions. [2024-06-27 19:04:57,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 639 transitions, 13088 flow [2024-06-27 19:05:01,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 639 transitions, 12678 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:05:01,086 INFO L231 Difference]: Finished difference. Result has 355 places, 574 transitions, 11384 flow [2024-06-27 19:05:01,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10292, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11384, PETRI_PLACES=355, PETRI_TRANSITIONS=574} [2024-06-27 19:05:01,087 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 304 predicate places. [2024-06-27 19:05:01,087 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 574 transitions, 11384 flow [2024-06-27 19:05:01,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:05:01,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:01,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:01,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:05:01,088 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:01,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1849966135, now seen corresponding path program 11 times [2024-06-27 19:05:01,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:01,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892458375] [2024-06-27 19:05:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:03,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:03,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892458375] [2024-06-27 19:05:03,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892458375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:03,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:03,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:03,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721472337] [2024-06-27 19:05:03,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:03,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:03,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:03,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:03,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 574 transitions, 11384 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:05:03,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:03,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:03,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:08,182 INFO L124 PetriNetUnfolderBase]: 8789/13632 cut-off events. [2024-06-27 19:05:08,183 INFO L125 PetriNetUnfolderBase]: For 719794/719802 co-relation queries the response was YES. [2024-06-27 19:05:08,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108372 conditions, 13632 events. 8789/13632 cut-off events. For 719794/719802 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 89248 event pairs, 1766 based on Foata normal form. 4/13628 useless extension candidates. Maximal degree in co-relation 108200. Up to 11725 conditions per place. [2024-06-27 19:05:08,397 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 457 selfloop transitions, 166 changer transitions 0/630 dead transitions. [2024-06-27 19:05:08,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 630 transitions, 13104 flow [2024-06-27 19:05:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:05:08,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 19:05:08,398 INFO L175 Difference]: Start difference. First operand has 355 places, 574 transitions, 11384 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:05:08,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 630 transitions, 13104 flow [2024-06-27 19:05:11,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 630 transitions, 12647 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-27 19:05:11,852 INFO L231 Difference]: Finished difference. Result has 358 places, 574 transitions, 11266 flow [2024-06-27 19:05:11,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10927, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11266, PETRI_PLACES=358, PETRI_TRANSITIONS=574} [2024-06-27 19:05:11,852 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 307 predicate places. [2024-06-27 19:05:11,853 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 574 transitions, 11266 flow [2024-06-27 19:05:11,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 19:05:11,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:11,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:11,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:05:11,853 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:11,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1427095091, now seen corresponding path program 10 times [2024-06-27 19:05:11,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:11,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383718429] [2024-06-27 19:05:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:11,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:14,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:14,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383718429] [2024-06-27 19:05:14,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383718429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:14,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:14,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:05:14,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415295601] [2024-06-27 19:05:14,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:14,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:05:14,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:14,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:05:14,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:05:14,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:14,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 574 transitions, 11266 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:14,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:14,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:14,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:19,212 INFO L124 PetriNetUnfolderBase]: 8786/13817 cut-off events. [2024-06-27 19:05:19,212 INFO L125 PetriNetUnfolderBase]: For 720039/720041 co-relation queries the response was YES. [2024-06-27 19:05:19,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107551 conditions, 13817 events. 8786/13817 cut-off events. For 720039/720041 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 92131 event pairs, 1984 based on Foata normal form. 1/13816 useless extension candidates. Maximal degree in co-relation 107378. Up to 11750 conditions per place. [2024-06-27 19:05:19,482 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 458 selfloop transitions, 168 changer transitions 0/633 dead transitions. [2024-06-27 19:05:19,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 633 transitions, 12796 flow [2024-06-27 19:05:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:05:19,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-27 19:05:19,484 INFO L175 Difference]: Start difference. First operand has 358 places, 574 transitions, 11266 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:05:19,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 633 transitions, 12796 flow [2024-06-27 19:05:22,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 633 transitions, 12516 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:22,807 INFO L231 Difference]: Finished difference. Result has 360 places, 574 transitions, 11374 flow [2024-06-27 19:05:22,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10986, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11374, PETRI_PLACES=360, PETRI_TRANSITIONS=574} [2024-06-27 19:05:22,808 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 309 predicate places. [2024-06-27 19:05:22,808 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 574 transitions, 11374 flow [2024-06-27 19:05:22,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:22,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:22,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:22,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:05:22,809 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:22,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:22,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1604226425, now seen corresponding path program 12 times [2024-06-27 19:05:22,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:22,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219568056] [2024-06-27 19:05:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:22,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat