./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe004_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:56:17,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:56:17,804 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:56:17,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:56:17,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:56:17,834 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:56:17,834 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:56:17,834 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:56:17,835 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:56:17,838 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:56:17,838 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:56:17,838 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:56:17,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:56:17,840 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:56:17,840 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:56:17,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:56:17,841 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:56:17,841 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:56:17,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:56:17,841 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:56:17,841 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:56:17,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:56:17,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:56:17,844 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:56:17,844 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:56:17,845 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:56:17,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:56:17,845 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:56:17,845 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:56:17,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:56:17,846 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:56:17,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:56:17,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:56:17,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:56:17,847 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:56:17,847 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:56:17,847 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:56:17,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:56:17,848 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:56:17,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:56:17,848 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:56:17,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:56:17,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:56:17,849 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:56:18,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:56:18,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:56:18,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:56:18,082 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:56:18,088 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:56:18,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:56:19,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:56:19,201 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:56:19,201 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:56:19,221 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/516409eb1/c36c08ccd8694d8e93e4b7c2aa014cdb/FLAG0d6bc2f86 [2024-06-14 12:56:19,232 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/516409eb1/c36c08ccd8694d8e93e4b7c2aa014cdb [2024-06-14 12:56:19,233 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:56:19,234 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:56:19,234 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-14 12:56:19,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:56:19,378 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:56:19,379 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:56:19,379 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:56:19,383 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:56:19,383 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:56:19" (1/2) ... [2024-06-14 12:56:19,384 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f8deb2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:19, skipping insertion in model container [2024-06-14 12:56:19,384 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:56:19" (1/2) ... [2024-06-14 12:56:19,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48bb7e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:19, skipping insertion in model container [2024-06-14 12:56:19,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:56:19" (2/2) ... [2024-06-14 12:56:19,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f8deb2c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19, skipping insertion in model container [2024-06-14 12:56:19,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:56:19" (2/2) ... [2024-06-14 12:56:19,387 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:56:19,452 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:56:19,453 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 12:56:19,453 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 12:56:19,454 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 12:56:19,454 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:56:19,454 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-14 12:56:19,491 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:56:19,754 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:56:19,769 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:56:19,872 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:56:19,901 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:56:19,901 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19 WrapperNode [2024-06-14 12:56:19,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:56:19,902 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:56:19,903 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:56:19,903 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:56:19,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:19,928 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:19,955 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-14 12:56:19,956 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:56:19,957 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:56:19,957 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:56:19,957 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:56:19,965 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:19,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:19,969 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:19,982 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:56:19,982 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:19,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:19,989 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:19,991 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:20,010 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:20,012 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:20,015 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:56:20,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:56:20,016 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:56:20,016 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:56:20,016 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (1/1) ... [2024-06-14 12:56:20,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:56:20,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:56:20,054 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) [2024-06-14 12:56:20,063 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 [2024-06-14 12:56:20,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:56:20,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:56:20,094 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:56:20,094 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:56:20,094 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:56:20,094 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:56:20,095 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:56:20,095 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:56:20,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:56:20,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:56:20,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:56:20,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:56:20,097 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:56:20,229 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:56:20,231 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:56:20,539 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:56:20,539 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:56:20,658 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:56:20,658 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:56:20,659 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:56:20 BoogieIcfgContainer [2024-06-14 12:56:20,659 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:56:20,661 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:56:20,662 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:56:20,664 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:56:20,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:56:19" (1/4) ... [2024-06-14 12:56:20,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271fd404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:56:20, skipping insertion in model container [2024-06-14 12:56:20,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:56:19" (2/4) ... [2024-06-14 12:56:20,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271fd404 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:56:20, skipping insertion in model container [2024-06-14 12:56:20,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:19" (3/4) ... [2024-06-14 12:56:20,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271fd404 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:56:20, skipping insertion in model container [2024-06-14 12:56:20,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:56:20" (4/4) ... [2024-06-14 12:56:20,667 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:56:20,680 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:56:20,680 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:56:20,681 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:56:20,728 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:56:20,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:56:20,846 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 12:56:20,846 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:56:20,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:56:20,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:56:20,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 12:56:20,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:56:20,886 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;@6c852573, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:56:20,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:56:20,891 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:56:20,891 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:56:20,891 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:56:20,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:20,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:56:20,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:20,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:20,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1456369184, now seen corresponding path program 1 times [2024-06-14 12:56:20,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:20,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841058766] [2024-06-14 12:56:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:21,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:21,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841058766] [2024-06-14 12:56:21,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841058766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:21,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:21,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:56:21,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861267404] [2024-06-14 12:56:21,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:21,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:56:21,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:21,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:56:21,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:56:21,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:56:21,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:21,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:21,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:56:21,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:22,261 INFO L124 PetriNetUnfolderBase]: 1152/1756 cut-off events. [2024-06-14 12:56:22,261 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 12:56:22,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3598 conditions, 1756 events. 1152/1756 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8194 event pairs, 693 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-14 12:56:22,276 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 12:56:22,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 177 flow [2024-06-14 12:56:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:56:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:56:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-14 12:56:22,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 12:56:22,287 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 71 transitions. [2024-06-14 12:56:22,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 177 flow [2024-06-14 12:56:22,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:22,293 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 12:56:22,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 12:56:22,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 12:56:22,298 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 12:56:22,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:22,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:22,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:22,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:56:22,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:22,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:22,299 INFO L85 PathProgramCache]: Analyzing trace with hash 588573823, now seen corresponding path program 1 times [2024-06-14 12:56:22,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:22,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388147073] [2024-06-14 12:56:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:22,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:22,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:22,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388147073] [2024-06-14 12:56:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388147073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:22,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:22,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:56:22,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396277173] [2024-06-14 12:56:22,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:22,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:56:22,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:22,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:56:22,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:56:22,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:56:22,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:22,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:22,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:56:22,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:23,249 INFO L124 PetriNetUnfolderBase]: 1644/2457 cut-off events. [2024-06-14 12:56:23,250 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2024-06-14 12:56:23,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 2457 events. 1644/2457 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11113 event pairs, 1035 based on Foata normal form. 3/2458 useless extension candidates. Maximal degree in co-relation 5625. Up to 2429 conditions per place. [2024-06-14 12:56:23,261 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 45 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 12:56:23,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 260 flow [2024-06-14 12:56:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:56:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:56:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-14 12:56:23,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 12:56:23,265 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 84 transitions. [2024-06-14 12:56:23,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 260 flow [2024-06-14 12:56:23,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:56:23,267 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-14 12:56:23,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-14 12:56:23,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 12:56:23,268 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-14 12:56:23,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:23,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:23,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:23,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:56:23,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:23,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1065920051, now seen corresponding path program 1 times [2024-06-14 12:56:23,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:23,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513506739] [2024-06-14 12:56:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:23,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:23,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:23,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513506739] [2024-06-14 12:56:23,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513506739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:23,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:23,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:56:23,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062817581] [2024-06-14 12:56:23,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:23,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:56:23,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:23,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:56:23,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:56:23,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:56:23,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:23,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:23,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:56:23,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:24,293 INFO L124 PetriNetUnfolderBase]: 1632/2439 cut-off events. [2024-06-14 12:56:24,294 INFO L125 PetriNetUnfolderBase]: For 1217/1217 co-relation queries the response was YES. [2024-06-14 12:56:24,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6215 conditions, 2439 events. 1632/2439 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11020 event pairs, 743 based on Foata normal form. 6/2443 useless extension candidates. Maximal degree in co-relation 6197. Up to 2381 conditions per place. [2024-06-14 12:56:24,306 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 12:56:24,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 346 flow [2024-06-14 12:56:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:56:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:56:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-14 12:56:24,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-14 12:56:24,310 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 103 transitions. [2024-06-14 12:56:24,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 346 flow [2024-06-14 12:56:24,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 344 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 12:56:24,313 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 198 flow [2024-06-14 12:56:24,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-14 12:56:24,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-14 12:56:24,315 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 198 flow [2024-06-14 12:56:24,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:24,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:24,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:24,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:56:24,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:24,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2146976690, now seen corresponding path program 1 times [2024-06-14 12:56:24,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:24,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754705580] [2024-06-14 12:56:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:24,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:25,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754705580] [2024-06-14 12:56:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754705580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:25,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:25,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:25,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136455957] [2024-06-14 12:56:25,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:25,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:25,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:25,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:56:25,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:25,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:25,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:56:25,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:25,719 INFO L124 PetriNetUnfolderBase]: 1623/2424 cut-off events. [2024-06-14 12:56:25,720 INFO L125 PetriNetUnfolderBase]: For 2223/2223 co-relation queries the response was YES. [2024-06-14 12:56:25,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6782 conditions, 2424 events. 1623/2424 cut-off events. For 2223/2223 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10903 event pairs, 579 based on Foata normal form. 6/2428 useless extension candidates. Maximal degree in co-relation 6761. Up to 2336 conditions per place. [2024-06-14 12:56:25,734 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 57 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-14 12:56:25,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 410 flow [2024-06-14 12:56:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 12:56:25,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-14 12:56:25,737 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 198 flow. Second operand 6 states and 117 transitions. [2024-06-14 12:56:25,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 410 flow [2024-06-14 12:56:25,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 388 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:25,743 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 217 flow [2024-06-14 12:56:25,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=217, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-14 12:56:25,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-14 12:56:25,744 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 217 flow [2024-06-14 12:56:25,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:25,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:25,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:25,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:56:25,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:25,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:25,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1906018500, now seen corresponding path program 1 times [2024-06-14 12:56:25,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:25,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286796569] [2024-06-14 12:56:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:25,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:26,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:26,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286796569] [2024-06-14 12:56:26,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286796569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:26,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:26,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:56:26,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458966182] [2024-06-14 12:56:26,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:26,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:56:26,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:26,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:56:26,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:56:26,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:56:26,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:26,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:26,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:56:26,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:26,706 INFO L124 PetriNetUnfolderBase]: 1245/1944 cut-off events. [2024-06-14 12:56:26,706 INFO L125 PetriNetUnfolderBase]: For 2900/2936 co-relation queries the response was YES. [2024-06-14 12:56:26,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5724 conditions, 1944 events. 1245/1944 cut-off events. For 2900/2936 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9317 event pairs, 585 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 5702. Up to 1826 conditions per place. [2024-06-14 12:56:26,717 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2024-06-14 12:56:26,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 379 flow [2024-06-14 12:56:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:56:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:56:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 12:56:26,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-14 12:56:26,719 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 217 flow. Second operand 5 states and 91 transitions. [2024-06-14 12:56:26,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 379 flow [2024-06-14 12:56:26,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 348 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:26,725 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 257 flow [2024-06-14 12:56:26,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-14 12:56:26,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-14 12:56:26,727 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 257 flow [2024-06-14 12:56:26,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:26,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:26,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:26,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:56:26,729 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:26,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:26,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1081397346, now seen corresponding path program 1 times [2024-06-14 12:56:26,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:26,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917746002] [2024-06-14 12:56:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:26,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:27,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:27,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917746002] [2024-06-14 12:56:27,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917746002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:27,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:27,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:27,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798298317] [2024-06-14 12:56:27,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:27,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:27,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:27,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:27,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:27,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:27,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:27,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:27,764 INFO L124 PetriNetUnfolderBase]: 1626/2432 cut-off events. [2024-06-14 12:56:27,764 INFO L125 PetriNetUnfolderBase]: For 4631/4641 co-relation queries the response was YES. [2024-06-14 12:56:27,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7868 conditions, 2432 events. 1626/2432 cut-off events. For 4631/4641 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10910 event pairs, 734 based on Foata normal form. 12/2441 useless extension candidates. Maximal degree in co-relation 7843. Up to 2346 conditions per place. [2024-06-14 12:56:27,780 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-14 12:56:27,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 519 flow [2024-06-14 12:56:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:56:27,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:56:27,782 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 257 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:56:27,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 519 flow [2024-06-14 12:56:27,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 502 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:27,787 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 348 flow [2024-06-14 12:56:27,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-06-14 12:56:27,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 12:56:27,790 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 348 flow [2024-06-14 12:56:27,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:27,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:27,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:27,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:56:27,791 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:27,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2129436313, now seen corresponding path program 1 times [2024-06-14 12:56:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:27,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112691341] [2024-06-14 12:56:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:27,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:28,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:28,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112691341] [2024-06-14 12:56:28,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112691341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:28,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534962896] [2024-06-14 12:56:28,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:28,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:28,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:28,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:28,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 348 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:28,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:28,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:28,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:28,813 INFO L124 PetriNetUnfolderBase]: 1649/2466 cut-off events. [2024-06-14 12:56:28,813 INFO L125 PetriNetUnfolderBase]: For 6739/6739 co-relation queries the response was YES. [2024-06-14 12:56:28,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8893 conditions, 2466 events. 1649/2466 cut-off events. For 6739/6739 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11011 event pairs, 758 based on Foata normal form. 2/2466 useless extension candidates. Maximal degree in co-relation 8865. Up to 2422 conditions per place. [2024-06-14 12:56:28,826 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 70 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2024-06-14 12:56:28,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 630 flow [2024-06-14 12:56:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:56:28,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:56:28,827 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 348 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:56:28,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 630 flow [2024-06-14 12:56:28,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 601 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:28,833 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 429 flow [2024-06-14 12:56:28,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-14 12:56:28,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-14 12:56:28,834 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 429 flow [2024-06-14 12:56:28,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:28,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:28,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:28,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:56:28,834 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:28,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:28,835 INFO L85 PathProgramCache]: Analyzing trace with hash 830700505, now seen corresponding path program 2 times [2024-06-14 12:56:28,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:28,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829939190] [2024-06-14 12:56:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:28,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:29,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:29,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829939190] [2024-06-14 12:56:29,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829939190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:29,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:29,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:29,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636057870] [2024-06-14 12:56:29,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:29,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:29,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:29,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:29,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:29,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:29,901 INFO L124 PetriNetUnfolderBase]: 1660/2482 cut-off events. [2024-06-14 12:56:29,901 INFO L125 PetriNetUnfolderBase]: For 8271/8271 co-relation queries the response was YES. [2024-06-14 12:56:29,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9215 conditions, 2482 events. 1660/2482 cut-off events. For 8271/8271 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11094 event pairs, 754 based on Foata normal form. 2/2482 useless extension candidates. Maximal degree in co-relation 9184. Up to 2429 conditions per place. [2024-06-14 12:56:29,916 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 68 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2024-06-14 12:56:29,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 681 flow [2024-06-14 12:56:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 12:56:29,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:56:29,918 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 429 flow. Second operand 6 states and 99 transitions. [2024-06-14 12:56:29,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 681 flow [2024-06-14 12:56:29,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 640 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:29,925 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 470 flow [2024-06-14 12:56:29,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2024-06-14 12:56:29,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-14 12:56:29,927 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 470 flow [2024-06-14 12:56:29,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:29,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:29,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:29,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:56:29,927 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:29,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:29,928 INFO L85 PathProgramCache]: Analyzing trace with hash -807277655, now seen corresponding path program 3 times [2024-06-14 12:56:29,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:29,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81642286] [2024-06-14 12:56:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:29,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:30,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81642286] [2024-06-14 12:56:30,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81642286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:30,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:30,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:30,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190089900] [2024-06-14 12:56:30,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:30,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:30,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:30,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:30,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:30,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:30,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:30,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:30,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:30,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:30,956 INFO L124 PetriNetUnfolderBase]: 1647/2465 cut-off events. [2024-06-14 12:56:30,957 INFO L125 PetriNetUnfolderBase]: For 9962/9972 co-relation queries the response was YES. [2024-06-14 12:56:30,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9378 conditions, 2465 events. 1647/2465 cut-off events. For 9962/9972 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11068 event pairs, 759 based on Foata normal form. 12/2473 useless extension candidates. Maximal degree in co-relation 9347. Up to 2355 conditions per place. [2024-06-14 12:56:30,971 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 61 selfloop transitions, 24 changer transitions 0/88 dead transitions. [2024-06-14 12:56:30,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 703 flow [2024-06-14 12:56:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 12:56:30,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 12:56:30,973 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 470 flow. Second operand 6 states and 100 transitions. [2024-06-14 12:56:30,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 703 flow [2024-06-14 12:56:30,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 647 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:30,981 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 505 flow [2024-06-14 12:56:30,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=505, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-14 12:56:30,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-14 12:56:30,982 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 505 flow [2024-06-14 12:56:30,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:30,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:30,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:30,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:56:30,983 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:30,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:30,983 INFO L85 PathProgramCache]: Analyzing trace with hash 836422361, now seen corresponding path program 1 times [2024-06-14 12:56:30,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:30,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293158410] [2024-06-14 12:56:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:30,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:31,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:31,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293158410] [2024-06-14 12:56:31,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293158410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:31,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:31,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:31,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494912089] [2024-06-14 12:56:31,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:31,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:31,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:31,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:31,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:31,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:31,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 505 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:31,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:31,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:31,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:32,262 INFO L124 PetriNetUnfolderBase]: 1713/2565 cut-off events. [2024-06-14 12:56:32,262 INFO L125 PetriNetUnfolderBase]: For 10181/10185 co-relation queries the response was YES. [2024-06-14 12:56:32,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9744 conditions, 2565 events. 1713/2565 cut-off events. For 10181/10185 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11545 event pairs, 506 based on Foata normal form. 12/2572 useless extension candidates. Maximal degree in co-relation 9711. Up to 2263 conditions per place. [2024-06-14 12:56:32,275 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 74 selfloop transitions, 35 changer transitions 0/112 dead transitions. [2024-06-14 12:56:32,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 927 flow [2024-06-14 12:56:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:56:32,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-14 12:56:32,277 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 505 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:56:32,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 927 flow [2024-06-14 12:56:32,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 112 transitions, 891 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:32,285 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 648 flow [2024-06-14 12:56:32,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=648, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-06-14 12:56:32,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-14 12:56:32,286 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 648 flow [2024-06-14 12:56:32,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:32,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:32,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:32,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:56:32,287 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:32,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:32,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2009442793, now seen corresponding path program 1 times [2024-06-14 12:56:32,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:32,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68746417] [2024-06-14 12:56:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:32,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:32,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:32,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68746417] [2024-06-14 12:56:32,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68746417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:32,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:32,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:32,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222326626] [2024-06-14 12:56:32,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:32,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:32,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:32,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:32,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:32,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:32,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 648 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:32,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:32,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:32,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:33,387 INFO L124 PetriNetUnfolderBase]: 1747/2612 cut-off events. [2024-06-14 12:56:33,387 INFO L125 PetriNetUnfolderBase]: For 13418/13418 co-relation queries the response was YES. [2024-06-14 12:56:33,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11144 conditions, 2612 events. 1747/2612 cut-off events. For 13418/13418 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11775 event pairs, 503 based on Foata normal form. 4/2614 useless extension candidates. Maximal degree in co-relation 11109. Up to 2510 conditions per place. [2024-06-14 12:56:33,400 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 97 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-14 12:56:33,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 1045 flow [2024-06-14 12:56:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:33,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:33,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:56:33,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:56:33,402 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 648 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:56:33,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 1045 flow [2024-06-14 12:56:33,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 125 transitions, 1011 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:33,413 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 763 flow [2024-06-14 12:56:33,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=763, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2024-06-14 12:56:33,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-14 12:56:33,413 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 763 flow [2024-06-14 12:56:33,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:33,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:33,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:33,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:56:33,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:33,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash 739436373, now seen corresponding path program 2 times [2024-06-14 12:56:33,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:33,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975225631] [2024-06-14 12:56:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:33,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:33,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:33,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975225631] [2024-06-14 12:56:33,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975225631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:33,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:33,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:33,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062976078] [2024-06-14 12:56:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:33,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:33,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:33,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:33,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:34,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:34,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 763 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:34,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:34,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:34,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:34,508 INFO L124 PetriNetUnfolderBase]: 1769/2644 cut-off events. [2024-06-14 12:56:34,508 INFO L125 PetriNetUnfolderBase]: For 16332/16332 co-relation queries the response was YES. [2024-06-14 12:56:34,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12025 conditions, 2644 events. 1769/2644 cut-off events. For 16332/16332 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11901 event pairs, 500 based on Foata normal form. 4/2646 useless extension candidates. Maximal degree in co-relation 11986. Up to 2524 conditions per place. [2024-06-14 12:56:34,525 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 26 changer transitions 0/124 dead transitions. [2024-06-14 12:56:34,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 1130 flow [2024-06-14 12:56:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:56:34,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-14 12:56:34,527 INFO L175 Difference]: Start difference. First operand has 83 places, 96 transitions, 763 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:56:34,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 1130 flow [2024-06-14 12:56:34,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 1092 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:34,543 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 828 flow [2024-06-14 12:56:34,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=828, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-14 12:56:34,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-14 12:56:34,544 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 828 flow [2024-06-14 12:56:34,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:34,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:34,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:34,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:56:34,544 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:34,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 739556343, now seen corresponding path program 3 times [2024-06-14 12:56:34,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:34,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89029363] [2024-06-14 12:56:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:34,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:35,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:35,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89029363] [2024-06-14 12:56:35,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89029363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:35,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:35,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:35,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937218219] [2024-06-14 12:56:35,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:35,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:35,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:35,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:35,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:35,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 828 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:35,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:35,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:35,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:35,652 INFO L124 PetriNetUnfolderBase]: 1807/2699 cut-off events. [2024-06-14 12:56:35,652 INFO L125 PetriNetUnfolderBase]: For 19456/19456 co-relation queries the response was YES. [2024-06-14 12:56:35,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12719 conditions, 2699 events. 1807/2699 cut-off events. For 19456/19456 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12149 event pairs, 499 based on Foata normal form. 4/2701 useless extension candidates. Maximal degree in co-relation 12679. Up to 2527 conditions per place. [2024-06-14 12:56:35,668 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-14 12:56:35,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 131 transitions, 1302 flow [2024-06-14 12:56:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:56:35,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-14 12:56:35,670 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 828 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:56:35,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 131 transitions, 1302 flow [2024-06-14 12:56:35,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 131 transitions, 1220 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:35,688 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 911 flow [2024-06-14 12:56:35,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-14 12:56:35,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-14 12:56:35,689 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 911 flow [2024-06-14 12:56:35,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:35,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:35,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:35,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:56:35,690 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:35,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:35,691 INFO L85 PathProgramCache]: Analyzing trace with hash 159044901, now seen corresponding path program 4 times [2024-06-14 12:56:35,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:35,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550746979] [2024-06-14 12:56:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:35,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:36,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:36,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550746979] [2024-06-14 12:56:36,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550746979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:36,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:36,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:36,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794984904] [2024-06-14 12:56:36,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:36,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:36,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:36,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:36,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:36,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:36,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 911 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:36,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:36,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:36,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:37,017 INFO L124 PetriNetUnfolderBase]: 1847/2764 cut-off events. [2024-06-14 12:56:37,018 INFO L125 PetriNetUnfolderBase]: For 20161/20174 co-relation queries the response was YES. [2024-06-14 12:56:37,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12845 conditions, 2764 events. 1847/2764 cut-off events. For 20161/20174 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12593 event pairs, 506 based on Foata normal form. 18/2776 useless extension candidates. Maximal degree in co-relation 12804. Up to 2287 conditions per place. [2024-06-14 12:56:37,034 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 86 selfloop transitions, 52 changer transitions 0/141 dead transitions. [2024-06-14 12:56:37,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 1437 flow [2024-06-14 12:56:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:56:37,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 12:56:37,036 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 911 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:56:37,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 1437 flow [2024-06-14 12:56:37,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 141 transitions, 1401 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:37,058 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 1079 flow [2024-06-14 12:56:37,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1079, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-14 12:56:37,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-14 12:56:37,059 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 1079 flow [2024-06-14 12:56:37,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:37,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:37,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:37,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:56:37,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:37,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash 159291165, now seen corresponding path program 1 times [2024-06-14 12:56:37,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:37,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65622476] [2024-06-14 12:56:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:37,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:37,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:37,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65622476] [2024-06-14 12:56:37,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65622476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:37,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:37,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:37,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97054809] [2024-06-14 12:56:37,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:37,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:37,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:37,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:37,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 1079 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:37,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:37,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:37,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:38,511 INFO L124 PetriNetUnfolderBase]: 1947/2940 cut-off events. [2024-06-14 12:56:38,511 INFO L125 PetriNetUnfolderBase]: For 25122/25135 co-relation queries the response was YES. [2024-06-14 12:56:38,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14460 conditions, 2940 events. 1947/2940 cut-off events. For 25122/25135 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13703 event pairs, 446 based on Foata normal form. 34/2968 useless extension candidates. Maximal degree in co-relation 14416. Up to 2366 conditions per place. [2024-06-14 12:56:38,529 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 96 selfloop transitions, 54 changer transitions 0/153 dead transitions. [2024-06-14 12:56:38,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 153 transitions, 1639 flow [2024-06-14 12:56:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:56:38,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 12:56:38,531 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 1079 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:56:38,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 153 transitions, 1639 flow [2024-06-14 12:56:38,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 1562 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:38,560 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 1157 flow [2024-06-14 12:56:38,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1157, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2024-06-14 12:56:38,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-14 12:56:38,560 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 1157 flow [2024-06-14 12:56:38,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:38,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:38,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:38,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:56:38,561 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:38,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash -821612956, now seen corresponding path program 1 times [2024-06-14 12:56:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:38,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086868428] [2024-06-14 12:56:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:38,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:39,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:39,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086868428] [2024-06-14 12:56:39,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086868428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:39,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:39,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:39,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282861138] [2024-06-14 12:56:39,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:39,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:39,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:39,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:39,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 1157 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:39,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:39,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:39,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:39,874 INFO L124 PetriNetUnfolderBase]: 1970/2971 cut-off events. [2024-06-14 12:56:39,874 INFO L125 PetriNetUnfolderBase]: For 26814/26814 co-relation queries the response was YES. [2024-06-14 12:56:39,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15263 conditions, 2971 events. 1970/2971 cut-off events. For 26814/26814 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13920 event pairs, 525 based on Foata normal form. 2/2971 useless extension candidates. Maximal degree in co-relation 15218. Up to 2853 conditions per place. [2024-06-14 12:56:39,889 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 120 selfloop transitions, 31 changer transitions 0/154 dead transitions. [2024-06-14 12:56:39,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 154 transitions, 1646 flow [2024-06-14 12:56:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:56:39,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:56:39,891 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 1157 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:56:39,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 154 transitions, 1646 flow [2024-06-14 12:56:39,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 154 transitions, 1515 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:39,918 INFO L231 Difference]: Finished difference. Result has 102 places, 126 transitions, 1210 flow [2024-06-14 12:56:39,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1210, PETRI_PLACES=102, PETRI_TRANSITIONS=126} [2024-06-14 12:56:39,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-14 12:56:39,918 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 126 transitions, 1210 flow [2024-06-14 12:56:39,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:39,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:39,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:39,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:56:39,919 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:39,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:39,919 INFO L85 PathProgramCache]: Analyzing trace with hash -564492936, now seen corresponding path program 2 times [2024-06-14 12:56:39,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:39,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447920971] [2024-06-14 12:56:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:39,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:40,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:40,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447920971] [2024-06-14 12:56:40,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447920971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:40,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:40,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:40,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317779263] [2024-06-14 12:56:40,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:40,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:40,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:40,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:40,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:40,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:40,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 1210 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:40,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:40,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:40,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:41,339 INFO L124 PetriNetUnfolderBase]: 1965/2964 cut-off events. [2024-06-14 12:56:41,339 INFO L125 PetriNetUnfolderBase]: For 29237/29237 co-relation queries the response was YES. [2024-06-14 12:56:41,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15197 conditions, 2964 events. 1965/2964 cut-off events. For 29237/29237 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13869 event pairs, 522 based on Foata normal form. 2/2964 useless extension candidates. Maximal degree in co-relation 15150. Up to 2819 conditions per place. [2024-06-14 12:56:41,352 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 114 selfloop transitions, 33 changer transitions 0/150 dead transitions. [2024-06-14 12:56:41,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 150 transitions, 1600 flow [2024-06-14 12:56:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:56:41,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-14 12:56:41,354 INFO L175 Difference]: Start difference. First operand has 102 places, 126 transitions, 1210 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:56:41,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 150 transitions, 1600 flow [2024-06-14 12:56:41,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 150 transitions, 1530 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:41,378 INFO L231 Difference]: Finished difference. Result has 104 places, 126 transitions, 1226 flow [2024-06-14 12:56:41,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=104, PETRI_TRANSITIONS=126} [2024-06-14 12:56:41,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-14 12:56:41,379 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 126 transitions, 1226 flow [2024-06-14 12:56:41,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:41,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:41,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:41,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:56:41,380 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:41,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1447692771, now seen corresponding path program 1 times [2024-06-14 12:56:41,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:41,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651690866] [2024-06-14 12:56:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:41,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:41,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651690866] [2024-06-14 12:56:41,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651690866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:41,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:41,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:41,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704890980] [2024-06-14 12:56:41,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:41,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:41,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:42,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:42,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 126 transitions, 1226 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:42,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:42,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:42,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:42,472 INFO L124 PetriNetUnfolderBase]: 1987/2999 cut-off events. [2024-06-14 12:56:42,472 INFO L125 PetriNetUnfolderBase]: For 33100/33117 co-relation queries the response was YES. [2024-06-14 12:56:42,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15627 conditions, 2999 events. 1987/2999 cut-off events. For 33100/33117 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14096 event pairs, 528 based on Foata normal form. 18/3012 useless extension candidates. Maximal degree in co-relation 15579. Up to 2836 conditions per place. [2024-06-14 12:56:42,490 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 118 selfloop transitions, 31 changer transitions 0/152 dead transitions. [2024-06-14 12:56:42,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1647 flow [2024-06-14 12:56:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:56:42,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 12:56:42,492 INFO L175 Difference]: Start difference. First operand has 104 places, 126 transitions, 1226 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:56:42,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1647 flow [2024-06-14 12:56:42,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 152 transitions, 1561 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:42,516 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1244 flow [2024-06-14 12:56:42,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1244, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-14 12:56:42,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-14 12:56:42,517 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1244 flow [2024-06-14 12:56:42,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:42,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:42,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:42,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:56:42,517 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:42,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:42,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1009631325, now seen corresponding path program 2 times [2024-06-14 12:56:42,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:42,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856133877] [2024-06-14 12:56:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:42,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:43,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:43,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856133877] [2024-06-14 12:56:43,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856133877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:43,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:43,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:43,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961068377] [2024-06-14 12:56:43,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:43,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:43,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:43,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:43,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:43,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:43,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1244 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:43,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:43,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:43,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:43,599 INFO L124 PetriNetUnfolderBase]: 2025/3055 cut-off events. [2024-06-14 12:56:43,600 INFO L125 PetriNetUnfolderBase]: For 30803/30816 co-relation queries the response was YES. [2024-06-14 12:56:43,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 3055 events. 2025/3055 cut-off events. For 30803/30816 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14376 event pairs, 528 based on Foata normal form. 10/3059 useless extension candidates. Maximal degree in co-relation 15693. Up to 2503 conditions per place. [2024-06-14 12:56:43,617 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 92 selfloop transitions, 66 changer transitions 0/161 dead transitions. [2024-06-14 12:56:43,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 161 transitions, 1842 flow [2024-06-14 12:56:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:56:43,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:56:43,618 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1244 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:56:43,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 161 transitions, 1842 flow [2024-06-14 12:56:43,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1775 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:43,643 INFO L231 Difference]: Finished difference. Result has 107 places, 135 transitions, 1386 flow [2024-06-14 12:56:43,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1386, PETRI_PLACES=107, PETRI_TRANSITIONS=135} [2024-06-14 12:56:43,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-14 12:56:43,644 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 135 transitions, 1386 flow [2024-06-14 12:56:43,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:43,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:43,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:43,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:56:43,644 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:43,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1009636905, now seen corresponding path program 3 times [2024-06-14 12:56:43,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:43,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882604563] [2024-06-14 12:56:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:43,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:44,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882604563] [2024-06-14 12:56:44,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882604563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:44,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:44,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:44,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694188280] [2024-06-14 12:56:44,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:44,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:44,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:44,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:44,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:44,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:44,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 135 transitions, 1386 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:44,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:44,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:44,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:44,726 INFO L124 PetriNetUnfolderBase]: 1998/3014 cut-off events. [2024-06-14 12:56:44,726 INFO L125 PetriNetUnfolderBase]: For 33577/33590 co-relation queries the response was YES. [2024-06-14 12:56:44,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15921 conditions, 3014 events. 1998/3014 cut-off events. For 33577/33590 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14099 event pairs, 530 based on Foata normal form. 14/3022 useless extension candidates. Maximal degree in co-relation 15871. Up to 2480 conditions per place. [2024-06-14 12:56:44,742 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 88 selfloop transitions, 70 changer transitions 0/161 dead transitions. [2024-06-14 12:56:44,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1926 flow [2024-06-14 12:56:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:56:44,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-14 12:56:44,744 INFO L175 Difference]: Start difference. First operand has 107 places, 135 transitions, 1386 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:56:44,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1926 flow [2024-06-14 12:56:44,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1818 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:44,777 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1430 flow [2024-06-14 12:56:44,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1430, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-14 12:56:44,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-14 12:56:44,777 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1430 flow [2024-06-14 12:56:44,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:44,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:44,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:44,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:56:44,778 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:44,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash 635641370, now seen corresponding path program 1 times [2024-06-14 12:56:44,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:44,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197341856] [2024-06-14 12:56:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:44,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:45,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:45,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197341856] [2024-06-14 12:56:45,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197341856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:45,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:45,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:45,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203972165] [2024-06-14 12:56:45,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:45,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:45,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:45,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:45,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:45,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:45,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1430 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:45,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:45,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:45,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:46,165 INFO L124 PetriNetUnfolderBase]: 1987/2996 cut-off events. [2024-06-14 12:56:46,166 INFO L125 PetriNetUnfolderBase]: For 36470/36483 co-relation queries the response was YES. [2024-06-14 12:56:46,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16065 conditions, 2996 events. 1987/2996 cut-off events. For 36470/36483 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14055 event pairs, 543 based on Foata normal form. 12/3004 useless extension candidates. Maximal degree in co-relation 16014. Up to 2849 conditions per place. [2024-06-14 12:56:46,185 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 128 selfloop transitions, 31 changer transitions 0/162 dead transitions. [2024-06-14 12:56:46,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 162 transitions, 1890 flow [2024-06-14 12:56:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:56:46,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 12:56:46,187 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1430 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:56:46,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 162 transitions, 1890 flow [2024-06-14 12:56:46,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 162 transitions, 1713 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:46,223 INFO L231 Difference]: Finished difference. Result has 114 places, 139 transitions, 1385 flow [2024-06-14 12:56:46,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1385, PETRI_PLACES=114, PETRI_TRANSITIONS=139} [2024-06-14 12:56:46,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-14 12:56:46,224 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 139 transitions, 1385 flow [2024-06-14 12:56:46,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:46,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:46,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:46,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:56:46,224 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:46,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1456217790, now seen corresponding path program 1 times [2024-06-14 12:56:46,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:46,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162946484] [2024-06-14 12:56:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:46,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:47,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:47,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162946484] [2024-06-14 12:56:47,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162946484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:47,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:47,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:47,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576393294] [2024-06-14 12:56:47,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:47,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:47,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:47,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:47,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 139 transitions, 1385 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:47,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:47,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:47,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:47,697 INFO L124 PetriNetUnfolderBase]: 2004/3022 cut-off events. [2024-06-14 12:56:47,697 INFO L125 PetriNetUnfolderBase]: For 39310/39310 co-relation queries the response was YES. [2024-06-14 12:56:47,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16232 conditions, 3022 events. 2004/3022 cut-off events. For 39310/39310 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14184 event pairs, 368 based on Foata normal form. 4/3024 useless extension candidates. Maximal degree in co-relation 16179. Up to 2870 conditions per place. [2024-06-14 12:56:47,715 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-14 12:56:47,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1851 flow [2024-06-14 12:56:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:56:47,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:56:47,716 INFO L175 Difference]: Start difference. First operand has 114 places, 139 transitions, 1385 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:56:47,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1851 flow [2024-06-14 12:56:47,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 170 transitions, 1783 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:47,754 INFO L231 Difference]: Finished difference. Result has 117 places, 141 transitions, 1400 flow [2024-06-14 12:56:47,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=117, PETRI_TRANSITIONS=141} [2024-06-14 12:56:47,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-14 12:56:47,754 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 141 transitions, 1400 flow [2024-06-14 12:56:47,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:47,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:47,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:47,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:56:47,755 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:47,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash -319410268, now seen corresponding path program 2 times [2024-06-14 12:56:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:47,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513782004] [2024-06-14 12:56:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:48,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:48,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513782004] [2024-06-14 12:56:48,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513782004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:48,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:48,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:48,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279274876] [2024-06-14 12:56:48,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:48,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:48,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:48,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:48,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:48,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 141 transitions, 1400 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:48,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:48,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:48,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:49,253 INFO L124 PetriNetUnfolderBase]: 2021/3047 cut-off events. [2024-06-14 12:56:49,253 INFO L125 PetriNetUnfolderBase]: For 43413/43413 co-relation queries the response was YES. [2024-06-14 12:56:49,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16701 conditions, 3047 events. 2021/3047 cut-off events. For 43413/43413 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14330 event pairs, 483 based on Foata normal form. 4/3049 useless extension candidates. Maximal degree in co-relation 16647. Up to 2869 conditions per place. [2024-06-14 12:56:49,270 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 35 changer transitions 0/172 dead transitions. [2024-06-14 12:56:49,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 172 transitions, 1878 flow [2024-06-14 12:56:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:56:49,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:56:49,272 INFO L175 Difference]: Start difference. First operand has 117 places, 141 transitions, 1400 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:56:49,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 172 transitions, 1878 flow [2024-06-14 12:56:49,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 172 transitions, 1813 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:49,315 INFO L231 Difference]: Finished difference. Result has 119 places, 143 transitions, 1445 flow [2024-06-14 12:56:49,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1445, PETRI_PLACES=119, PETRI_TRANSITIONS=143} [2024-06-14 12:56:49,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-14 12:56:49,315 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 143 transitions, 1445 flow [2024-06-14 12:56:49,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:49,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:49,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:49,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:56:49,316 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:49,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:49,316 INFO L85 PathProgramCache]: Analyzing trace with hash -319410144, now seen corresponding path program 1 times [2024-06-14 12:56:49,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:49,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813005733] [2024-06-14 12:56:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:49,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:50,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:50,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813005733] [2024-06-14 12:56:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813005733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:50,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:50,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:50,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706200123] [2024-06-14 12:56:50,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:50,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:50,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:50,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 143 transitions, 1445 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:56:50,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:50,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:50,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:50,632 INFO L124 PetriNetUnfolderBase]: 2001/3009 cut-off events. [2024-06-14 12:56:50,632 INFO L125 PetriNetUnfolderBase]: For 47591/47604 co-relation queries the response was YES. [2024-06-14 12:56:50,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16867 conditions, 3009 events. 2001/3009 cut-off events. For 47591/47604 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14030 event pairs, 480 based on Foata normal form. 12/3017 useless extension candidates. Maximal degree in co-relation 16812. Up to 2815 conditions per place. [2024-06-14 12:56:50,651 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 125 selfloop transitions, 38 changer transitions 0/166 dead transitions. [2024-06-14 12:56:50,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 166 transitions, 1867 flow [2024-06-14 12:56:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:56:50,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 12:56:50,653 INFO L175 Difference]: Start difference. First operand has 119 places, 143 transitions, 1445 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:56:50,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 166 transitions, 1867 flow [2024-06-14 12:56:50,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 166 transitions, 1775 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:50,693 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1443 flow [2024-06-14 12:56:50,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1443, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-14 12:56:50,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-14 12:56:50,694 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1443 flow [2024-06-14 12:56:50,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:56:50,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:50,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:50,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:56:50,694 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:50,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:50,695 INFO L85 PathProgramCache]: Analyzing trace with hash -333737722, now seen corresponding path program 3 times [2024-06-14 12:56:50,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:50,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590973460] [2024-06-14 12:56:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:50,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:51,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:51,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590973460] [2024-06-14 12:56:51,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590973460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:51,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:51,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:51,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992292065] [2024-06-14 12:56:51,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:51,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:51,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:51,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:51,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1443 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:51,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:51,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:51,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:52,313 INFO L124 PetriNetUnfolderBase]: 2018/3034 cut-off events. [2024-06-14 12:56:52,313 INFO L125 PetriNetUnfolderBase]: For 52020/52020 co-relation queries the response was YES. [2024-06-14 12:56:52,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17206 conditions, 3034 events. 2018/3034 cut-off events. For 52020/52020 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14159 event pairs, 470 based on Foata normal form. 4/3036 useless extension candidates. Maximal degree in co-relation 17150. Up to 2830 conditions per place. [2024-06-14 12:56:52,334 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 128 selfloop transitions, 42 changer transitions 0/173 dead transitions. [2024-06-14 12:56:52,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 173 transitions, 1927 flow [2024-06-14 12:56:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:56:52,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:56:52,349 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1443 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:56:52,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 173 transitions, 1927 flow [2024-06-14 12:56:52,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 173 transitions, 1781 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:56:52,392 INFO L231 Difference]: Finished difference. Result has 121 places, 145 transitions, 1422 flow [2024-06-14 12:56:52,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1422, PETRI_PLACES=121, PETRI_TRANSITIONS=145} [2024-06-14 12:56:52,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-14 12:56:52,393 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 145 transitions, 1422 flow [2024-06-14 12:56:52,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:52,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:52,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:52,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:56:52,393 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:52,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash 209305566, now seen corresponding path program 1 times [2024-06-14 12:56:52,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:52,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332072817] [2024-06-14 12:56:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:52,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:52,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:52,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332072817] [2024-06-14 12:56:52,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332072817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:52,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:52,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:52,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914387825] [2024-06-14 12:56:52,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:52,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:52,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:52,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:52,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:53,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:53,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 145 transitions, 1422 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:53,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:53,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:53,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:53,511 INFO L124 PetriNetUnfolderBase]: 2023/3042 cut-off events. [2024-06-14 12:56:53,512 INFO L125 PetriNetUnfolderBase]: For 51773/51773 co-relation queries the response was YES. [2024-06-14 12:56:53,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17293 conditions, 3042 events. 2023/3042 cut-off events. For 51773/51773 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14224 event pairs, 489 based on Foata normal form. 1/3041 useless extension candidates. Maximal degree in co-relation 17236. Up to 2990 conditions per place. [2024-06-14 12:56:53,531 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 147 selfloop transitions, 19 changer transitions 0/169 dead transitions. [2024-06-14 12:56:53,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 169 transitions, 1918 flow [2024-06-14 12:56:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:53,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 12:56:53,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 12:56:53,532 INFO L175 Difference]: Start difference. First operand has 121 places, 145 transitions, 1422 flow. Second operand 6 states and 98 transitions. [2024-06-14 12:56:53,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 169 transitions, 1918 flow [2024-06-14 12:56:53,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1811 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:53,579 INFO L231 Difference]: Finished difference. Result has 122 places, 154 transitions, 1444 flow [2024-06-14 12:56:53,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=122, PETRI_TRANSITIONS=154} [2024-06-14 12:56:53,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-14 12:56:53,580 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 154 transitions, 1444 flow [2024-06-14 12:56:53,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:53,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:53,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:53,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:56:53,580 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:53,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:53,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1776623708, now seen corresponding path program 4 times [2024-06-14 12:56:53,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:53,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269542727] [2024-06-14 12:56:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:54,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:54,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269542727] [2024-06-14 12:56:54,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269542727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:54,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:54,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:54,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177094207] [2024-06-14 12:56:54,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:54,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:54,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:54,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:54,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:54,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:54,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 154 transitions, 1444 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:54,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:54,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:54,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:55,180 INFO L124 PetriNetUnfolderBase]: 2032/3060 cut-off events. [2024-06-14 12:56:55,180 INFO L125 PetriNetUnfolderBase]: For 56687/56703 co-relation queries the response was YES. [2024-06-14 12:56:55,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17567 conditions, 3060 events. 2032/3060 cut-off events. For 56687/56703 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14254 event pairs, 485 based on Foata normal form. 15/3069 useless extension candidates. Maximal degree in co-relation 17508. Up to 2645 conditions per place. [2024-06-14 12:56:55,199 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 122 selfloop transitions, 58 changer transitions 0/183 dead transitions. [2024-06-14 12:56:55,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 183 transitions, 1952 flow [2024-06-14 12:56:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:56:55,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 12:56:55,200 INFO L175 Difference]: Start difference. First operand has 122 places, 154 transitions, 1444 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:56:55,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 183 transitions, 1952 flow [2024-06-14 12:56:55,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 183 transitions, 1930 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-14 12:56:55,251 INFO L231 Difference]: Finished difference. Result has 129 places, 157 transitions, 1592 flow [2024-06-14 12:56:55,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1592, PETRI_PLACES=129, PETRI_TRANSITIONS=157} [2024-06-14 12:56:55,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-14 12:56:55,252 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 157 transitions, 1592 flow [2024-06-14 12:56:55,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:55,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:55,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:55,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:56:55,252 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:55,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash 417172692, now seen corresponding path program 1 times [2024-06-14 12:56:55,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:55,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247429594] [2024-06-14 12:56:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:55,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:56,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:56,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247429594] [2024-06-14 12:56:56,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247429594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:56,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:56,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:56,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947130932] [2024-06-14 12:56:56,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:56,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:56,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:56,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:56,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:56,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 157 transitions, 1592 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:56:56,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:56,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:56,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:56,602 INFO L124 PetriNetUnfolderBase]: 2060/3103 cut-off events. [2024-06-14 12:56:56,602 INFO L125 PetriNetUnfolderBase]: For 62225/62241 co-relation queries the response was YES. [2024-06-14 12:56:56,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18544 conditions, 3103 events. 2060/3103 cut-off events. For 62225/62241 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14488 event pairs, 485 based on Foata normal form. 11/3108 useless extension candidates. Maximal degree in co-relation 18482. Up to 2593 conditions per place. [2024-06-14 12:56:56,623 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 119 selfloop transitions, 68 changer transitions 0/190 dead transitions. [2024-06-14 12:56:56,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 190 transitions, 2222 flow [2024-06-14 12:56:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:56:56,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:56:56,624 INFO L175 Difference]: Start difference. First operand has 129 places, 157 transitions, 1592 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:56:56,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 190 transitions, 2222 flow [2024-06-14 12:56:56,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 190 transitions, 2045 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:56,680 INFO L231 Difference]: Finished difference. Result has 131 places, 162 transitions, 1620 flow [2024-06-14 12:56:56,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1620, PETRI_PLACES=131, PETRI_TRANSITIONS=162} [2024-06-14 12:56:56,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 12:56:56,681 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 162 transitions, 1620 flow [2024-06-14 12:56:56,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:56:56,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:56,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:56,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:56:56,682 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:56,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash 408891724, now seen corresponding path program 1 times [2024-06-14 12:56:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:56,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586384680] [2024-06-14 12:56:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:57,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:57,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586384680] [2024-06-14 12:56:57,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586384680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:57,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:57,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:57,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461972060] [2024-06-14 12:56:57,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:57,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:57,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:57,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:57,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:57,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 162 transitions, 1620 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:56:57,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:57,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:57,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:58,126 INFO L124 PetriNetUnfolderBase]: 2050/3089 cut-off events. [2024-06-14 12:56:58,126 INFO L125 PetriNetUnfolderBase]: For 65509/65525 co-relation queries the response was YES. [2024-06-14 12:56:58,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18614 conditions, 3089 events. 2050/3089 cut-off events. For 65509/65525 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14408 event pairs, 490 based on Foata normal form. 11/3094 useless extension candidates. Maximal degree in co-relation 18551. Up to 2562 conditions per place. [2024-06-14 12:56:58,147 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 115 selfloop transitions, 70 changer transitions 0/188 dead transitions. [2024-06-14 12:56:58,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 188 transitions, 2102 flow [2024-06-14 12:56:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:56:58,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:56:58,149 INFO L175 Difference]: Start difference. First operand has 131 places, 162 transitions, 1620 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:56:58,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 188 transitions, 2102 flow [2024-06-14 12:56:58,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 188 transitions, 1951 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:58,205 INFO L231 Difference]: Finished difference. Result has 135 places, 162 transitions, 1617 flow [2024-06-14 12:56:58,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1617, PETRI_PLACES=135, PETRI_TRANSITIONS=162} [2024-06-14 12:56:58,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-14 12:56:58,206 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 162 transitions, 1617 flow [2024-06-14 12:56:58,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:56:58,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:58,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:58,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:56:58,207 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:58,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:58,207 INFO L85 PathProgramCache]: Analyzing trace with hash 339890280, now seen corresponding path program 2 times [2024-06-14 12:56:58,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:58,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126341464] [2024-06-14 12:56:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:58,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:59,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:59,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126341464] [2024-06-14 12:56:59,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126341464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:59,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:59,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:59,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123034196] [2024-06-14 12:56:59,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:59,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:59,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:59,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:59,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:59,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:59,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 162 transitions, 1617 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:56:59,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:59,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:59,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:59,529 INFO L124 PetriNetUnfolderBase]: 2067/3115 cut-off events. [2024-06-14 12:56:59,529 INFO L125 PetriNetUnfolderBase]: For 70485/70501 co-relation queries the response was YES. [2024-06-14 12:56:59,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18961 conditions, 3115 events. 2067/3115 cut-off events. For 70485/70501 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14632 event pairs, 445 based on Foata normal form. 16/3127 useless extension candidates. Maximal degree in co-relation 18897. Up to 2863 conditions per place. [2024-06-14 12:56:59,552 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 39 changer transitions 0/194 dead transitions. [2024-06-14 12:56:59,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 194 transitions, 2285 flow [2024-06-14 12:56:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:56:59,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:56:59,553 INFO L175 Difference]: Start difference. First operand has 135 places, 162 transitions, 1617 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:56:59,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 194 transitions, 2285 flow [2024-06-14 12:56:59,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 194 transitions, 2125 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:56:59,620 INFO L231 Difference]: Finished difference. Result has 137 places, 167 transitions, 1648 flow [2024-06-14 12:56:59,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1648, PETRI_PLACES=137, PETRI_TRANSITIONS=167} [2024-06-14 12:56:59,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-14 12:56:59,621 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 167 transitions, 1648 flow [2024-06-14 12:56:59,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:56:59,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:59,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:59,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:56:59,621 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:59,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash 408898482, now seen corresponding path program 3 times [2024-06-14 12:56:59,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:59,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359198826] [2024-06-14 12:56:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:59,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:00,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:00,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359198826] [2024-06-14 12:57:00,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359198826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:00,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:00,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:00,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835793578] [2024-06-14 12:57:00,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:00,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:00,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:00,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:00,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 167 transitions, 1648 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:57:00,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:00,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:00,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:01,044 INFO L124 PetriNetUnfolderBase]: 2059/3103 cut-off events. [2024-06-14 12:57:01,044 INFO L125 PetriNetUnfolderBase]: For 74984/75000 co-relation queries the response was YES. [2024-06-14 12:57:01,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19037 conditions, 3103 events. 2059/3103 cut-off events. For 74984/75000 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14522 event pairs, 492 based on Foata normal form. 16/3115 useless extension candidates. Maximal degree in co-relation 18971. Up to 2961 conditions per place. [2024-06-14 12:57:01,064 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 29 changer transitions 0/191 dead transitions. [2024-06-14 12:57:01,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 191 transitions, 2120 flow [2024-06-14 12:57:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:57:01,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:57:01,066 INFO L175 Difference]: Start difference. First operand has 137 places, 167 transitions, 1648 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:57:01,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 191 transitions, 2120 flow [2024-06-14 12:57:01,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 191 transitions, 2010 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:01,138 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1603 flow [2024-06-14 12:57:01,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1603, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-14 12:57:01,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-14 12:57:01,139 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1603 flow [2024-06-14 12:57:01,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:57:01,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:01,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:01,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:57:01,140 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:01,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash 209633856, now seen corresponding path program 2 times [2024-06-14 12:57:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:01,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188185676] [2024-06-14 12:57:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:01,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:01,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:01,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188185676] [2024-06-14 12:57:01,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188185676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:01,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:01,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:57:01,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815040115] [2024-06-14 12:57:01,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:01,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:57:01,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:01,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:57:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:57:01,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:01,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1603 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:01,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:01,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:01,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:02,275 INFO L124 PetriNetUnfolderBase]: 2066/3111 cut-off events. [2024-06-14 12:57:02,275 INFO L125 PetriNetUnfolderBase]: For 78552/78552 co-relation queries the response was YES. [2024-06-14 12:57:02,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19147 conditions, 3111 events. 2066/3111 cut-off events. For 78552/78552 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14624 event pairs, 490 based on Foata normal form. 3/3112 useless extension candidates. Maximal degree in co-relation 19079. Up to 3051 conditions per place. [2024-06-14 12:57:02,299 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-06-14 12:57:02,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 184 transitions, 2057 flow [2024-06-14 12:57:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:57:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:57:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 12:57:02,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:57:02,300 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1603 flow. Second operand 5 states and 90 transitions. [2024-06-14 12:57:02,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 184 transitions, 2057 flow [2024-06-14 12:57:02,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 184 transitions, 1960 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:02,370 INFO L231 Difference]: Finished difference. Result has 139 places, 170 transitions, 1612 flow [2024-06-14 12:57:02,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1612, PETRI_PLACES=139, PETRI_TRANSITIONS=170} [2024-06-14 12:57:02,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-14 12:57:02,371 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 170 transitions, 1612 flow [2024-06-14 12:57:02,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:02,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:02,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:02,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:57:02,371 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:02,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1313655978, now seen corresponding path program 1 times [2024-06-14 12:57:02,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:02,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986455969] [2024-06-14 12:57:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:02,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:03,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:03,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986455969] [2024-06-14 12:57:03,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986455969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:03,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:03,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:03,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762808831] [2024-06-14 12:57:03,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:03,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:03,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:03,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:03,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:03,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 170 transitions, 1612 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:03,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:03,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:03,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:03,860 INFO L124 PetriNetUnfolderBase]: 2083/3141 cut-off events. [2024-06-14 12:57:03,860 INFO L125 PetriNetUnfolderBase]: For 84386/84405 co-relation queries the response was YES. [2024-06-14 12:57:03,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19636 conditions, 3141 events. 2083/3141 cut-off events. For 84386/84405 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14789 event pairs, 329 based on Foata normal form. 18/3155 useless extension candidates. Maximal degree in co-relation 19567. Up to 2964 conditions per place. [2024-06-14 12:57:03,883 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 26 changer transitions 0/200 dead transitions. [2024-06-14 12:57:03,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 200 transitions, 2146 flow [2024-06-14 12:57:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:03,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:57:03,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 12:57:03,884 INFO L175 Difference]: Start difference. First operand has 139 places, 170 transitions, 1612 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:57:03,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 200 transitions, 2146 flow [2024-06-14 12:57:03,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 200 transitions, 2098 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:57:03,952 INFO L231 Difference]: Finished difference. Result has 144 places, 172 transitions, 1661 flow [2024-06-14 12:57:03,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1661, PETRI_PLACES=144, PETRI_TRANSITIONS=172} [2024-06-14 12:57:03,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-14 12:57:03,952 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 172 transitions, 1661 flow [2024-06-14 12:57:03,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:03,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:03,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:03,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:57:03,953 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:03,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1121680166, now seen corresponding path program 2 times [2024-06-14 12:57:03,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:03,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430221546] [2024-06-14 12:57:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:03,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:04,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:04,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430221546] [2024-06-14 12:57:04,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430221546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:04,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:04,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:04,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019930775] [2024-06-14 12:57:04,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:04,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:04,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:04,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:04,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:04,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:04,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 172 transitions, 1661 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:04,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:04,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:04,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:05,577 INFO L124 PetriNetUnfolderBase]: 2100/3166 cut-off events. [2024-06-14 12:57:05,578 INFO L125 PetriNetUnfolderBase]: For 90465/90484 co-relation queries the response was YES. [2024-06-14 12:57:05,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20173 conditions, 3166 events. 2100/3166 cut-off events. For 90465/90484 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14962 event pairs, 447 based on Foata normal form. 18/3180 useless extension candidates. Maximal degree in co-relation 20103. Up to 2949 conditions per place. [2024-06-14 12:57:05,602 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 40 changer transitions 0/202 dead transitions. [2024-06-14 12:57:05,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 202 transitions, 2211 flow [2024-06-14 12:57:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:57:05,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:57:05,603 INFO L175 Difference]: Start difference. First operand has 144 places, 172 transitions, 1661 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:57:05,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 202 transitions, 2211 flow [2024-06-14 12:57:05,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 202 transitions, 2132 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:05,688 INFO L231 Difference]: Finished difference. Result has 146 places, 174 transitions, 1712 flow [2024-06-14 12:57:05,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1712, PETRI_PLACES=146, PETRI_TRANSITIONS=174} [2024-06-14 12:57:05,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-14 12:57:05,688 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 174 transitions, 1712 flow [2024-06-14 12:57:05,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:05,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:05,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:05,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:57:05,689 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:05,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:05,689 INFO L85 PathProgramCache]: Analyzing trace with hash -549107424, now seen corresponding path program 3 times [2024-06-14 12:57:05,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:05,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117023578] [2024-06-14 12:57:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:05,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:06,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:06,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117023578] [2024-06-14 12:57:06,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117023578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:06,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:06,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:06,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138068066] [2024-06-14 12:57:06,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:06,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:06,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:06,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:06,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 174 transitions, 1712 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:06,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:06,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:06,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:07,251 INFO L124 PetriNetUnfolderBase]: 2117/3193 cut-off events. [2024-06-14 12:57:07,251 INFO L125 PetriNetUnfolderBase]: For 97880/97899 co-relation queries the response was YES. [2024-06-14 12:57:07,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20693 conditions, 3193 events. 2117/3193 cut-off events. For 97880/97899 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15099 event pairs, 447 based on Foata normal form. 18/3207 useless extension candidates. Maximal degree in co-relation 20622. Up to 2920 conditions per place. [2024-06-14 12:57:07,275 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 161 selfloop transitions, 40 changer transitions 0/204 dead transitions. [2024-06-14 12:57:07,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 204 transitions, 2266 flow [2024-06-14 12:57:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:57:07,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:57:07,277 INFO L175 Difference]: Start difference. First operand has 146 places, 174 transitions, 1712 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:57:07,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 204 transitions, 2266 flow [2024-06-14 12:57:07,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 204 transitions, 2156 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:07,360 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1735 flow [2024-06-14 12:57:07,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1735, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-14 12:57:07,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-14 12:57:07,360 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1735 flow [2024-06-14 12:57:07,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:07,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:07,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:07,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:57:07,361 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:07,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:07,361 INFO L85 PathProgramCache]: Analyzing trace with hash -272460318, now seen corresponding path program 1 times [2024-06-14 12:57:07,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:07,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809041408] [2024-06-14 12:57:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:07,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:07,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:07,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809041408] [2024-06-14 12:57:07,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809041408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:07,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:07,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:07,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049042795] [2024-06-14 12:57:07,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:07,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:07,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:08,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:08,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1735 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:08,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:08,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:08,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:08,681 INFO L124 PetriNetUnfolderBase]: 2127/3207 cut-off events. [2024-06-14 12:57:08,682 INFO L125 PetriNetUnfolderBase]: For 102768/102768 co-relation queries the response was YES. [2024-06-14 12:57:08,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21028 conditions, 3207 events. 2127/3207 cut-off events. For 102768/102768 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15178 event pairs, 450 based on Foata normal form. 2/3207 useless extension candidates. Maximal degree in co-relation 20956. Up to 3080 conditions per place. [2024-06-14 12:57:08,706 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 33 changer transitions 0/205 dead transitions. [2024-06-14 12:57:08,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 205 transitions, 2341 flow [2024-06-14 12:57:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:57:08,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-14 12:57:08,707 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1735 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:57:08,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 205 transitions, 2341 flow [2024-06-14 12:57:08,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 205 transitions, 2226 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:08,795 INFO L231 Difference]: Finished difference. Result has 149 places, 182 transitions, 1753 flow [2024-06-14 12:57:08,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1753, PETRI_PLACES=149, PETRI_TRANSITIONS=182} [2024-06-14 12:57:08,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 12:57:08,796 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 182 transitions, 1753 flow [2024-06-14 12:57:08,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:08,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:08,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:08,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:57:08,797 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:08,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1051965330, now seen corresponding path program 1 times [2024-06-14 12:57:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:08,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173803962] [2024-06-14 12:57:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:08,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:09,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:09,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173803962] [2024-06-14 12:57:09,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173803962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:09,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:09,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427053684] [2024-06-14 12:57:09,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:09,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:09,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:09,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:09,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 182 transitions, 1753 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:09,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:09,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:09,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:10,354 INFO L124 PetriNetUnfolderBase]: 2321/3527 cut-off events. [2024-06-14 12:57:10,354 INFO L125 PetriNetUnfolderBase]: For 130352/130371 co-relation queries the response was YES. [2024-06-14 12:57:10,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23829 conditions, 3527 events. 2321/3527 cut-off events. For 130352/130371 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17193 event pairs, 421 based on Foata normal form. 24/3545 useless extension candidates. Maximal degree in co-relation 23756. Up to 2574 conditions per place. [2024-06-14 12:57:10,426 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 77 changer transitions 0/226 dead transitions. [2024-06-14 12:57:10,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 226 transitions, 2573 flow [2024-06-14 12:57:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:57:10,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:57:10,428 INFO L175 Difference]: Start difference. First operand has 149 places, 182 transitions, 1753 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:57:10,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 226 transitions, 2573 flow [2024-06-14 12:57:10,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 226 transitions, 2529 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:57:10,506 INFO L231 Difference]: Finished difference. Result has 155 places, 184 transitions, 1935 flow [2024-06-14 12:57:10,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1935, PETRI_PLACES=155, PETRI_TRANSITIONS=184} [2024-06-14 12:57:10,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-14 12:57:10,506 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 184 transitions, 1935 flow [2024-06-14 12:57:10,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:10,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:10,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:10,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:57:10,507 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:10,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:10,507 INFO L85 PathProgramCache]: Analyzing trace with hash -401286342, now seen corresponding path program 2 times [2024-06-14 12:57:10,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:10,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92446039] [2024-06-14 12:57:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:10,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:11,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:11,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92446039] [2024-06-14 12:57:11,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92446039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:11,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:11,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:11,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743239519] [2024-06-14 12:57:11,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:11,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:11,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:11,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:11,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:11,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:11,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 184 transitions, 1935 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:11,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:11,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:11,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:11,909 INFO L124 PetriNetUnfolderBase]: 2363/3601 cut-off events. [2024-06-14 12:57:11,909 INFO L125 PetriNetUnfolderBase]: For 140920/140939 co-relation queries the response was YES. [2024-06-14 12:57:11,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24707 conditions, 3601 events. 2363/3601 cut-off events. For 140920/140939 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17769 event pairs, 503 based on Foata normal form. 32/3627 useless extension candidates. Maximal degree in co-relation 24632. Up to 2936 conditions per place. [2024-06-14 12:57:11,933 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 136 selfloop transitions, 78 changer transitions 0/217 dead transitions. [2024-06-14 12:57:11,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 217 transitions, 2549 flow [2024-06-14 12:57:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:57:11,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 12:57:11,935 INFO L175 Difference]: Start difference. First operand has 155 places, 184 transitions, 1935 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:57:11,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 217 transitions, 2549 flow [2024-06-14 12:57:12,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 217 transitions, 2445 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:12,037 INFO L231 Difference]: Finished difference. Result has 159 places, 186 transitions, 2048 flow [2024-06-14 12:57:12,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2048, PETRI_PLACES=159, PETRI_TRANSITIONS=186} [2024-06-14 12:57:12,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-14 12:57:12,038 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 186 transitions, 2048 flow [2024-06-14 12:57:12,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:12,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:12,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:12,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:57:12,038 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:12,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:12,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1469518908, now seen corresponding path program 4 times [2024-06-14 12:57:12,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:12,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266555320] [2024-06-14 12:57:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:12,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:12,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:12,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266555320] [2024-06-14 12:57:12,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266555320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:12,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:12,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:12,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946360799] [2024-06-14 12:57:12,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:12,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:12,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:12,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:12,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 186 transitions, 2048 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:12,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:12,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:12,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:13,688 INFO L124 PetriNetUnfolderBase]: 2355/3589 cut-off events. [2024-06-14 12:57:13,688 INFO L125 PetriNetUnfolderBase]: For 136238/136257 co-relation queries the response was YES. [2024-06-14 12:57:13,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24993 conditions, 3589 events. 2355/3589 cut-off events. For 136238/136257 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17730 event pairs, 501 based on Foata normal form. 12/3595 useless extension candidates. Maximal degree in co-relation 24916. Up to 3044 conditions per place. [2024-06-14 12:57:13,717 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 137 selfloop transitions, 75 changer transitions 0/215 dead transitions. [2024-06-14 12:57:13,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 215 transitions, 2638 flow [2024-06-14 12:57:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:57:13,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:57:13,718 INFO L175 Difference]: Start difference. First operand has 159 places, 186 transitions, 2048 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:57:13,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 215 transitions, 2638 flow [2024-06-14 12:57:13,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 215 transitions, 2453 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:13,831 INFO L231 Difference]: Finished difference. Result has 161 places, 188 transitions, 2076 flow [2024-06-14 12:57:13,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2076, PETRI_PLACES=161, PETRI_TRANSITIONS=188} [2024-06-14 12:57:13,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-14 12:57:13,832 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 188 transitions, 2076 flow [2024-06-14 12:57:13,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:13,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:13,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:13,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:57:13,832 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:13,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:13,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1469515188, now seen corresponding path program 5 times [2024-06-14 12:57:13,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:13,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864729611] [2024-06-14 12:57:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:13,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:14,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:14,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864729611] [2024-06-14 12:57:14,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864729611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:14,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:14,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:14,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76613104] [2024-06-14 12:57:14,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:14,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:14,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:14,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:14,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 188 transitions, 2076 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:14,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:14,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:14,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:15,449 INFO L124 PetriNetUnfolderBase]: 2458/3758 cut-off events. [2024-06-14 12:57:15,449 INFO L125 PetriNetUnfolderBase]: For 152295/152314 co-relation queries the response was YES. [2024-06-14 12:57:15,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26428 conditions, 3758 events. 2458/3758 cut-off events. For 152295/152314 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18854 event pairs, 541 based on Foata normal form. 12/3764 useless extension candidates. Maximal degree in co-relation 26350. Up to 2822 conditions per place. [2024-06-14 12:57:15,478 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 138 selfloop transitions, 83 changer transitions 0/224 dead transitions. [2024-06-14 12:57:15,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 224 transitions, 2872 flow [2024-06-14 12:57:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:57:15,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 12:57:15,480 INFO L175 Difference]: Start difference. First operand has 161 places, 188 transitions, 2076 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:57:15,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 224 transitions, 2872 flow [2024-06-14 12:57:15,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 224 transitions, 2679 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:15,592 INFO L231 Difference]: Finished difference. Result has 163 places, 191 transitions, 2147 flow [2024-06-14 12:57:15,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2147, PETRI_PLACES=163, PETRI_TRANSITIONS=191} [2024-06-14 12:57:15,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-14 12:57:15,593 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 191 transitions, 2147 flow [2024-06-14 12:57:15,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:15,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:15,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:15,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:57:15,594 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:15,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:15,594 INFO L85 PathProgramCache]: Analyzing trace with hash 949392718, now seen corresponding path program 2 times [2024-06-14 12:57:15,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:15,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201793510] [2024-06-14 12:57:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:15,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:16,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:16,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201793510] [2024-06-14 12:57:16,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201793510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:16,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:16,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:16,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068021886] [2024-06-14 12:57:16,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:16,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:16,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:16,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:16,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 191 transitions, 2147 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:16,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:16,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:16,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:16,965 INFO L124 PetriNetUnfolderBase]: 2468/3768 cut-off events. [2024-06-14 12:57:16,965 INFO L125 PetriNetUnfolderBase]: For 159190/159190 co-relation queries the response was YES. [2024-06-14 12:57:16,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26824 conditions, 3768 events. 2468/3768 cut-off events. For 159190/159190 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18941 event pairs, 561 based on Foata normal form. 2/3768 useless extension candidates. Maximal degree in co-relation 26745. Up to 3639 conditions per place. [2024-06-14 12:57:16,995 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 175 selfloop transitions, 35 changer transitions 0/213 dead transitions. [2024-06-14 12:57:16,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 213 transitions, 2741 flow [2024-06-14 12:57:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:57:16,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:57:16,996 INFO L175 Difference]: Start difference. First operand has 163 places, 191 transitions, 2147 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:57:16,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 213 transitions, 2741 flow [2024-06-14 12:57:17,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 213 transitions, 2598 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:17,116 INFO L231 Difference]: Finished difference. Result has 166 places, 194 transitions, 2108 flow [2024-06-14 12:57:17,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2108, PETRI_PLACES=166, PETRI_TRANSITIONS=194} [2024-06-14 12:57:17,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 12:57:17,117 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 194 transitions, 2108 flow [2024-06-14 12:57:17,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:17,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:17,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:17,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:57:17,117 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:17,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:17,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2101461192, now seen corresponding path program 1 times [2024-06-14 12:57:17,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:17,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161220128] [2024-06-14 12:57:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:17,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:17,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:17,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161220128] [2024-06-14 12:57:17,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161220128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:17,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:17,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:17,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713474128] [2024-06-14 12:57:17,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:17,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:17,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:17,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:17,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 194 transitions, 2108 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:17,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:17,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:17,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:18,505 INFO L124 PetriNetUnfolderBase]: 2478/3783 cut-off events. [2024-06-14 12:57:18,506 INFO L125 PetriNetUnfolderBase]: For 164415/164415 co-relation queries the response was YES. [2024-06-14 12:57:18,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26930 conditions, 3783 events. 2478/3783 cut-off events. For 164415/164415 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18992 event pairs, 571 based on Foata normal form. 2/3783 useless extension candidates. Maximal degree in co-relation 26849. Up to 3703 conditions per place. [2024-06-14 12:57:18,538 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 184 selfloop transitions, 31 changer transitions 0/218 dead transitions. [2024-06-14 12:57:18,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 218 transitions, 2764 flow [2024-06-14 12:57:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:57:18,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:57:18,540 INFO L175 Difference]: Start difference. First operand has 166 places, 194 transitions, 2108 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:57:18,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 218 transitions, 2764 flow [2024-06-14 12:57:18,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 2703 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:18,664 INFO L231 Difference]: Finished difference. Result has 169 places, 200 transitions, 2209 flow [2024-06-14 12:57:18,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2209, PETRI_PLACES=169, PETRI_TRANSITIONS=200} [2024-06-14 12:57:18,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-14 12:57:18,664 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 200 transitions, 2209 flow [2024-06-14 12:57:18,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:18,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:18,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:18,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:57:18,665 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:18,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:18,666 INFO L85 PathProgramCache]: Analyzing trace with hash 47445626, now seen corresponding path program 3 times [2024-06-14 12:57:18,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:18,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148493443] [2024-06-14 12:57:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:18,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:19,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:19,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148493443] [2024-06-14 12:57:19,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148493443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:19,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:19,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:19,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100120896] [2024-06-14 12:57:19,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:19,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:19,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:19,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:19,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:19,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 200 transitions, 2209 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:19,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:19,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:19,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:20,121 INFO L124 PetriNetUnfolderBase]: 2442/3730 cut-off events. [2024-06-14 12:57:20,122 INFO L125 PetriNetUnfolderBase]: For 171843/171862 co-relation queries the response was YES. [2024-06-14 12:57:20,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26375 conditions, 3730 events. 2442/3730 cut-off events. For 171843/171862 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18668 event pairs, 527 based on Foata normal form. 28/3752 useless extension candidates. Maximal degree in co-relation 26293. Up to 3047 conditions per place. [2024-06-14 12:57:20,160 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 154 selfloop transitions, 74 changer transitions 0/231 dead transitions. [2024-06-14 12:57:20,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 231 transitions, 2803 flow [2024-06-14 12:57:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:57:20,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:57:20,161 INFO L175 Difference]: Start difference. First operand has 169 places, 200 transitions, 2209 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:57:20,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 231 transitions, 2803 flow [2024-06-14 12:57:20,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 231 transitions, 2730 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 12:57:20,371 INFO L231 Difference]: Finished difference. Result has 174 places, 200 transitions, 2295 flow [2024-06-14 12:57:20,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2295, PETRI_PLACES=174, PETRI_TRANSITIONS=200} [2024-06-14 12:57:20,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-14 12:57:20,372 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 200 transitions, 2295 flow [2024-06-14 12:57:20,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:20,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:20,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:20,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:57:20,372 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:20,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash 966056290, now seen corresponding path program 4 times [2024-06-14 12:57:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:20,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790559071] [2024-06-14 12:57:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:20,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:21,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:21,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790559071] [2024-06-14 12:57:21,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790559071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:21,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:21,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:21,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179545332] [2024-06-14 12:57:21,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:21,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:21,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:21,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:21,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:21,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 200 transitions, 2295 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:21,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:21,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:21,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:21,882 INFO L124 PetriNetUnfolderBase]: 2611/4009 cut-off events. [2024-06-14 12:57:21,882 INFO L125 PetriNetUnfolderBase]: For 194785/194804 co-relation queries the response was YES. [2024-06-14 12:57:21,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29085 conditions, 4009 events. 2611/4009 cut-off events. For 194785/194804 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20587 event pairs, 560 based on Foata normal form. 24/4027 useless extension candidates. Maximal degree in co-relation 29001. Up to 3012 conditions per place. [2024-06-14 12:57:21,919 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 75 changer transitions 0/238 dead transitions. [2024-06-14 12:57:21,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 238 transitions, 3135 flow [2024-06-14 12:57:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:57:21,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 12:57:21,920 INFO L175 Difference]: Start difference. First operand has 174 places, 200 transitions, 2295 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:57:21,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 238 transitions, 3135 flow [2024-06-14 12:57:22,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 238 transitions, 2972 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:22,119 INFO L231 Difference]: Finished difference. Result has 175 places, 202 transitions, 2363 flow [2024-06-14 12:57:22,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2363, PETRI_PLACES=175, PETRI_TRANSITIONS=202} [2024-06-14 12:57:22,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-14 12:57:22,119 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 202 transitions, 2363 flow [2024-06-14 12:57:22,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:22,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:22,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:22,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:57:22,120 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:22,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash 56649836, now seen corresponding path program 5 times [2024-06-14 12:57:22,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:22,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476014322] [2024-06-14 12:57:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:22,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:22,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:22,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476014322] [2024-06-14 12:57:22,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476014322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:22,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:22,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:22,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079555254] [2024-06-14 12:57:22,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:22,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:22,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:22,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:22,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:22,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:22,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 202 transitions, 2363 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:22,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:22,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:22,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:23,619 INFO L124 PetriNetUnfolderBase]: 2680/4132 cut-off events. [2024-06-14 12:57:23,619 INFO L125 PetriNetUnfolderBase]: For 210587/210606 co-relation queries the response was YES. [2024-06-14 12:57:23,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30164 conditions, 4132 events. 2680/4132 cut-off events. For 210587/210606 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21513 event pairs, 526 based on Foata normal form. 24/4150 useless extension candidates. Maximal degree in co-relation 30079. Up to 2266 conditions per place. [2024-06-14 12:57:23,653 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 154 selfloop transitions, 83 changer transitions 0/240 dead transitions. [2024-06-14 12:57:23,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 240 transitions, 3211 flow [2024-06-14 12:57:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:57:23,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 12:57:23,657 INFO L175 Difference]: Start difference. First operand has 175 places, 202 transitions, 2363 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:57:23,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 240 transitions, 3211 flow [2024-06-14 12:57:23,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 240 transitions, 3100 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:23,870 INFO L231 Difference]: Finished difference. Result has 179 places, 204 transitions, 2502 flow [2024-06-14 12:57:23,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2502, PETRI_PLACES=179, PETRI_TRANSITIONS=204} [2024-06-14 12:57:23,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-14 12:57:23,871 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 204 transitions, 2502 flow [2024-06-14 12:57:23,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:23,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:23,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:23,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:57:23,872 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:23,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash -760241152, now seen corresponding path program 6 times [2024-06-14 12:57:23,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:23,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166539974] [2024-06-14 12:57:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:23,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:24,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:24,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166539974] [2024-06-14 12:57:24,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166539974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:24,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:24,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:24,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867682918] [2024-06-14 12:57:24,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:24,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:24,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:24,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:24,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:24,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 204 transitions, 2502 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:24,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:24,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:24,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:25,442 INFO L124 PetriNetUnfolderBase]: 2705/4179 cut-off events. [2024-06-14 12:57:25,443 INFO L125 PetriNetUnfolderBase]: For 216934/216953 co-relation queries the response was YES. [2024-06-14 12:57:25,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30561 conditions, 4179 events. 2705/4179 cut-off events. For 216934/216953 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21929 event pairs, 637 based on Foata normal form. 28/4201 useless extension candidates. Maximal degree in co-relation 30474. Up to 3630 conditions per place. [2024-06-14 12:57:25,478 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 170 selfloop transitions, 63 changer transitions 0/236 dead transitions. [2024-06-14 12:57:25,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 236 transitions, 3142 flow [2024-06-14 12:57:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:57:25,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 12:57:25,479 INFO L175 Difference]: Start difference. First operand has 179 places, 204 transitions, 2502 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:57:25,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 236 transitions, 3142 flow [2024-06-14 12:57:25,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 236 transitions, 3032 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:25,728 INFO L231 Difference]: Finished difference. Result has 183 places, 205 transitions, 2566 flow [2024-06-14 12:57:25,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2566, PETRI_PLACES=183, PETRI_TRANSITIONS=205} [2024-06-14 12:57:25,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 12:57:25,728 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 205 transitions, 2566 flow [2024-06-14 12:57:25,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:25,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:25,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:25,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:57:25,729 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:25,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:25,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1747198524, now seen corresponding path program 3 times [2024-06-14 12:57:25,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:25,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204781256] [2024-06-14 12:57:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:25,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:26,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:26,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204781256] [2024-06-14 12:57:26,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204781256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:26,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:26,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:26,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112853798] [2024-06-14 12:57:26,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:26,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:26,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:26,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:26,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 205 transitions, 2566 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:26,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:26,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:26,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:27,190 INFO L124 PetriNetUnfolderBase]: 2719/4197 cut-off events. [2024-06-14 12:57:27,190 INFO L125 PetriNetUnfolderBase]: For 211434/211434 co-relation queries the response was YES. [2024-06-14 12:57:27,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30844 conditions, 4197 events. 2719/4197 cut-off events. For 211434/211434 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22097 event pairs, 642 based on Foata normal form. 6/4201 useless extension candidates. Maximal degree in co-relation 30755. Up to 4062 conditions per place. [2024-06-14 12:57:27,224 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 39 changer transitions 0/230 dead transitions. [2024-06-14 12:57:27,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 230 transitions, 3146 flow [2024-06-14 12:57:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:57:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:57:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:57:27,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:57:27,225 INFO L175 Difference]: Start difference. First operand has 183 places, 205 transitions, 2566 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:57:27,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 230 transitions, 3146 flow [2024-06-14 12:57:27,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 230 transitions, 2989 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:27,442 INFO L231 Difference]: Finished difference. Result has 182 places, 208 transitions, 2553 flow [2024-06-14 12:57:27,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2553, PETRI_PLACES=182, PETRI_TRANSITIONS=208} [2024-06-14 12:57:27,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-14 12:57:27,443 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 208 transitions, 2553 flow [2024-06-14 12:57:27,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:27,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:27,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:27,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:57:27,443 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:27,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:27,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2043715990, now seen corresponding path program 2 times [2024-06-14 12:57:27,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:27,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118878798] [2024-06-14 12:57:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:28,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:28,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118878798] [2024-06-14 12:57:28,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118878798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:28,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:28,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:28,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941581934] [2024-06-14 12:57:28,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:28,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:28,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:28,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:28,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:28,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 208 transitions, 2553 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:28,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:28,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:28,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:28,935 INFO L124 PetriNetUnfolderBase]: 2713/4188 cut-off events. [2024-06-14 12:57:28,935 INFO L125 PetriNetUnfolderBase]: For 202890/202890 co-relation queries the response was YES. [2024-06-14 12:57:28,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30664 conditions, 4188 events. 2713/4188 cut-off events. For 202890/202890 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22057 event pairs, 647 based on Foata normal form. 2/4188 useless extension candidates. Maximal degree in co-relation 30575. Up to 4122 conditions per place. [2024-06-14 12:57:28,975 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 195 selfloop transitions, 26 changer transitions 0/224 dead transitions. [2024-06-14 12:57:28,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 224 transitions, 3057 flow [2024-06-14 12:57:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:57:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:57:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:57:28,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:57:28,976 INFO L175 Difference]: Start difference. First operand has 182 places, 208 transitions, 2553 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:57:28,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 224 transitions, 3057 flow [2024-06-14 12:57:29,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 224 transitions, 2963 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:29,268 INFO L231 Difference]: Finished difference. Result has 184 places, 208 transitions, 2517 flow [2024-06-14 12:57:29,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2517, PETRI_PLACES=184, PETRI_TRANSITIONS=208} [2024-06-14 12:57:29,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-14 12:57:29,268 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 208 transitions, 2517 flow [2024-06-14 12:57:29,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:29,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:29,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:29,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:57:29,269 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:29,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:29,269 INFO L85 PathProgramCache]: Analyzing trace with hash -846974204, now seen corresponding path program 1 times [2024-06-14 12:57:29,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:29,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388625131] [2024-06-14 12:57:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:29,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:29,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:29,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388625131] [2024-06-14 12:57:29,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388625131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:29,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:29,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:29,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341956947] [2024-06-14 12:57:29,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:29,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:29,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:29,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:29,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:29,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:29,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 208 transitions, 2517 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:29,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:29,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:29,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:30,662 INFO L124 PetriNetUnfolderBase]: 2731/4215 cut-off events. [2024-06-14 12:57:30,662 INFO L125 PetriNetUnfolderBase]: For 210806/210825 co-relation queries the response was YES. [2024-06-14 12:57:30,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30970 conditions, 4215 events. 2731/4215 cut-off events. For 210806/210825 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22120 event pairs, 649 based on Foata normal form. 16/4227 useless extension candidates. Maximal degree in co-relation 30880. Up to 4046 conditions per place. [2024-06-14 12:57:30,696 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 197 selfloop transitions, 40 changer transitions 0/240 dead transitions. [2024-06-14 12:57:30,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 240 transitions, 3423 flow [2024-06-14 12:57:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:57:30,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 12:57:30,697 INFO L175 Difference]: Start difference. First operand has 184 places, 208 transitions, 2517 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:57:30,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 240 transitions, 3423 flow [2024-06-14 12:57:30,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 240 transitions, 3337 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:30,966 INFO L231 Difference]: Finished difference. Result has 187 places, 221 transitions, 2742 flow [2024-06-14 12:57:30,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2742, PETRI_PLACES=187, PETRI_TRANSITIONS=221} [2024-06-14 12:57:30,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-14 12:57:30,967 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 221 transitions, 2742 flow [2024-06-14 12:57:30,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:30,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:30,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:30,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:57:30,967 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:30,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:30,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1843531816, now seen corresponding path program 2 times [2024-06-14 12:57:30,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:30,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670354147] [2024-06-14 12:57:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:30,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:31,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:31,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670354147] [2024-06-14 12:57:31,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670354147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:31,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:31,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:31,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466201010] [2024-06-14 12:57:31,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:31,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:31,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:31,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 221 transitions, 2742 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:31,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:31,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:31,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:32,447 INFO L124 PetriNetUnfolderBase]: 2830/4351 cut-off events. [2024-06-14 12:57:32,447 INFO L125 PetriNetUnfolderBase]: For 232515/232515 co-relation queries the response was YES. [2024-06-14 12:57:32,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33019 conditions, 4351 events. 2830/4351 cut-off events. For 232515/232515 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22950 event pairs, 648 based on Foata normal form. 6/4355 useless extension candidates. Maximal degree in co-relation 32927. Up to 4240 conditions per place. [2024-06-14 12:57:32,486 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 223 selfloop transitions, 36 changer transitions 0/262 dead transitions. [2024-06-14 12:57:32,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 262 transitions, 3754 flow [2024-06-14 12:57:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:32,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:57:32,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:57:32,487 INFO L175 Difference]: Start difference. First operand has 187 places, 221 transitions, 2742 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:57:32,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 262 transitions, 3754 flow [2024-06-14 12:57:32,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 262 transitions, 3634 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-14 12:57:32,813 INFO L231 Difference]: Finished difference. Result has 194 places, 241 transitions, 3073 flow [2024-06-14 12:57:32,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3073, PETRI_PLACES=194, PETRI_TRANSITIONS=241} [2024-06-14 12:57:32,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-14 12:57:32,813 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 241 transitions, 3073 flow [2024-06-14 12:57:32,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:32,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:32,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:32,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:57:32,814 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:32,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:32,814 INFO L85 PathProgramCache]: Analyzing trace with hash 388453606, now seen corresponding path program 3 times [2024-06-14 12:57:32,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:32,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267783785] [2024-06-14 12:57:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:32,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:33,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:33,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267783785] [2024-06-14 12:57:33,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267783785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:33,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:33,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:33,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962677232] [2024-06-14 12:57:33,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:33,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:33,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:33,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:33,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:33,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 241 transitions, 3073 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:33,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:33,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:33,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:34,316 INFO L124 PetriNetUnfolderBase]: 2916/4471 cut-off events. [2024-06-14 12:57:34,316 INFO L125 PetriNetUnfolderBase]: For 248319/248319 co-relation queries the response was YES. [2024-06-14 12:57:34,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34882 conditions, 4471 events. 2916/4471 cut-off events. For 248319/248319 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23545 event pairs, 660 based on Foata normal form. 6/4475 useless extension candidates. Maximal degree in co-relation 34787. Up to 4277 conditions per place. [2024-06-14 12:57:34,359 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 56 changer transitions 0/286 dead transitions. [2024-06-14 12:57:34,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 286 transitions, 4159 flow [2024-06-14 12:57:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:57:34,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:57:34,360 INFO L175 Difference]: Start difference. First operand has 194 places, 241 transitions, 3073 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:57:34,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 286 transitions, 4159 flow [2024-06-14 12:57:34,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 286 transitions, 3995 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-14 12:57:34,772 INFO L231 Difference]: Finished difference. Result has 200 places, 261 transitions, 3456 flow [2024-06-14 12:57:34,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3456, PETRI_PLACES=200, PETRI_TRANSITIONS=261} [2024-06-14 12:57:34,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-14 12:57:34,773 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 261 transitions, 3456 flow [2024-06-14 12:57:34,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:34,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:34,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:34,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:57:34,773 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:34,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2044146580, now seen corresponding path program 1 times [2024-06-14 12:57:34,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:34,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303105366] [2024-06-14 12:57:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:34,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:35,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:35,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303105366] [2024-06-14 12:57:35,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303105366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:35,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:35,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:35,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837415011] [2024-06-14 12:57:35,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:35,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:35,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:35,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:35,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 261 transitions, 3456 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:35,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:35,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:35,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:36,599 INFO L124 PetriNetUnfolderBase]: 2911/4464 cut-off events. [2024-06-14 12:57:36,599 INFO L125 PetriNetUnfolderBase]: For 255603/255603 co-relation queries the response was YES. [2024-06-14 12:57:36,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35595 conditions, 4464 events. 2911/4464 cut-off events. For 255603/255603 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23509 event pairs, 670 based on Foata normal form. 2/4464 useless extension candidates. Maximal degree in co-relation 35496. Up to 4429 conditions per place. [2024-06-14 12:57:36,640 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 256 selfloop transitions, 13 changer transitions 0/272 dead transitions. [2024-06-14 12:57:36,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 272 transitions, 4066 flow [2024-06-14 12:57:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:57:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:57:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-14 12:57:36,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-14 12:57:36,641 INFO L175 Difference]: Start difference. First operand has 200 places, 261 transitions, 3456 flow. Second operand 5 states and 81 transitions. [2024-06-14 12:57:36,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 272 transitions, 4066 flow [2024-06-14 12:57:36,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 272 transitions, 3940 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-14 12:57:36,923 INFO L231 Difference]: Finished difference. Result has 203 places, 263 transitions, 3403 flow [2024-06-14 12:57:36,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3403, PETRI_PLACES=203, PETRI_TRANSITIONS=263} [2024-06-14 12:57:36,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-14 12:57:36,924 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 263 transitions, 3403 flow [2024-06-14 12:57:36,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:36,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:36,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:36,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:57:36,925 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:36,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash -299877389, now seen corresponding path program 1 times [2024-06-14 12:57:36,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:36,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222163406] [2024-06-14 12:57:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:36,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:37,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:37,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222163406] [2024-06-14 12:57:37,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222163406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:37,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:37,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:37,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947284767] [2024-06-14 12:57:37,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:37,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:37,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:37,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:37,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:38,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:38,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 263 transitions, 3403 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:38,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:38,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:38,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:38,812 INFO L124 PetriNetUnfolderBase]: 2891/4435 cut-off events. [2024-06-14 12:57:38,812 INFO L125 PetriNetUnfolderBase]: For 262461/262483 co-relation queries the response was YES. [2024-06-14 12:57:38,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35001 conditions, 4435 events. 2891/4435 cut-off events. For 262461/262483 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23183 event pairs, 501 based on Foata normal form. 21/4450 useless extension candidates. Maximal degree in co-relation 34900. Up to 4189 conditions per place. [2024-06-14 12:57:38,860 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 25 changer transitions 0/292 dead transitions. [2024-06-14 12:57:38,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 292 transitions, 4091 flow [2024-06-14 12:57:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:57:38,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:57:38,861 INFO L175 Difference]: Start difference. First operand has 203 places, 263 transitions, 3403 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:57:38,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 292 transitions, 4091 flow [2024-06-14 12:57:39,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 292 transitions, 4034 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 12:57:39,260 INFO L231 Difference]: Finished difference. Result has 208 places, 263 transitions, 3402 flow [2024-06-14 12:57:39,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3346, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3402, PETRI_PLACES=208, PETRI_TRANSITIONS=263} [2024-06-14 12:57:39,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-14 12:57:39,260 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 263 transitions, 3402 flow [2024-06-14 12:57:39,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:39,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:39,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:39,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:57:39,261 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:39,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:39,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1433718709, now seen corresponding path program 2 times [2024-06-14 12:57:39,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:39,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549060975] [2024-06-14 12:57:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:39,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:40,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:40,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549060975] [2024-06-14 12:57:40,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549060975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:40,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:40,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:57:40,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46094226] [2024-06-14 12:57:40,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:40,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:57:40,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:40,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:57:40,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:57:40,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:40,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 263 transitions, 3402 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 12:57:40,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:40,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:40,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:41,532 INFO L124 PetriNetUnfolderBase]: 2932/4504 cut-off events. [2024-06-14 12:57:41,532 INFO L125 PetriNetUnfolderBase]: For 273179/273201 co-relation queries the response was YES. [2024-06-14 12:57:41,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35652 conditions, 4504 events. 2932/4504 cut-off events. For 273179/273201 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23806 event pairs, 633 based on Foata normal form. 28/4528 useless extension candidates. Maximal degree in co-relation 35550. Up to 4218 conditions per place. [2024-06-14 12:57:41,655 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 41 changer transitions 0/299 dead transitions. [2024-06-14 12:57:41,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 299 transitions, 4172 flow [2024-06-14 12:57:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:57:41,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 12:57:41,656 INFO L175 Difference]: Start difference. First operand has 208 places, 263 transitions, 3402 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:57:41,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 299 transitions, 4172 flow [2024-06-14 12:57:41,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 299 transitions, 4040 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:41,933 INFO L231 Difference]: Finished difference. Result has 210 places, 264 transitions, 3398 flow [2024-06-14 12:57:41,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3398, PETRI_PLACES=210, PETRI_TRANSITIONS=264} [2024-06-14 12:57:41,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-14 12:57:41,934 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 264 transitions, 3398 flow [2024-06-14 12:57:41,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 12:57:41,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:41,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:41,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:57:41,935 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:41,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash -412460379, now seen corresponding path program 3 times [2024-06-14 12:57:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:41,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498898749] [2024-06-14 12:57:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:43,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:43,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498898749] [2024-06-14 12:57:43,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498898749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:43,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:43,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:57:43,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389726515] [2024-06-14 12:57:43,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:57:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:57:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:57:43,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:43,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 264 transitions, 3398 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 12:57:43,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:43,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:43,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:44,243 INFO L124 PetriNetUnfolderBase]: 2973/4575 cut-off events. [2024-06-14 12:57:44,243 INFO L125 PetriNetUnfolderBase]: For 287497/287519 co-relation queries the response was YES. [2024-06-14 12:57:44,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35849 conditions, 4575 events. 2973/4575 cut-off events. For 287497/287519 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24316 event pairs, 643 based on Foata normal form. 28/4599 useless extension candidates. Maximal degree in co-relation 35747. Up to 4233 conditions per place. [2024-06-14 12:57:44,282 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 41 changer transitions 0/300 dead transitions. [2024-06-14 12:57:44,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 300 transitions, 4165 flow [2024-06-14 12:57:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:44,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:57:44,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 12:57:44,283 INFO L175 Difference]: Start difference. First operand has 210 places, 264 transitions, 3398 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:57:44,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 300 transitions, 4165 flow [2024-06-14 12:57:44,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 300 transitions, 4055 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:44,672 INFO L231 Difference]: Finished difference. Result has 212 places, 265 transitions, 3415 flow [2024-06-14 12:57:44,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3415, PETRI_PLACES=212, PETRI_TRANSITIONS=265} [2024-06-14 12:57:44,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-14 12:57:44,673 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 265 transitions, 3415 flow [2024-06-14 12:57:44,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 12:57:44,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:44,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:44,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:57:44,673 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:44,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash 143665588, now seen corresponding path program 1 times [2024-06-14 12:57:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:44,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954083318] [2024-06-14 12:57:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:45,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:45,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954083318] [2024-06-14 12:57:45,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954083318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:45,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:45,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:45,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047249683] [2024-06-14 12:57:45,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:45,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:45,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:45,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:45,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 265 transitions, 3415 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:45,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:45,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:45,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:46,474 INFO L124 PetriNetUnfolderBase]: 2993/4603 cut-off events. [2024-06-14 12:57:46,474 INFO L125 PetriNetUnfolderBase]: For 289924/289924 co-relation queries the response was YES. [2024-06-14 12:57:46,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36124 conditions, 4603 events. 2993/4603 cut-off events. For 289924/289924 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24494 event pairs, 667 based on Foata normal form. 4/4605 useless extension candidates. Maximal degree in co-relation 36021. Up to 4381 conditions per place. [2024-06-14 12:57:46,524 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 56 changer transitions 0/299 dead transitions. [2024-06-14 12:57:46,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 299 transitions, 4321 flow [2024-06-14 12:57:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:57:46,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 12:57:46,525 INFO L175 Difference]: Start difference. First operand has 212 places, 265 transitions, 3415 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:57:46,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 299 transitions, 4321 flow [2024-06-14 12:57:46,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 299 transitions, 4209 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:46,851 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 3527 flow [2024-06-14 12:57:46,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3527, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-14 12:57:46,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-14 12:57:46,852 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 3527 flow [2024-06-14 12:57:46,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:46,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:46,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:46,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:57:46,852 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:46,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash -726508483, now seen corresponding path program 1 times [2024-06-14 12:57:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:46,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408581529] [2024-06-14 12:57:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:46,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:47,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:47,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408581529] [2024-06-14 12:57:47,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408581529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:47,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:47,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:47,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903723591] [2024-06-14 12:57:47,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:47,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:47,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:47,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:47,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 3527 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:47,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:47,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:47,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:48,467 INFO L124 PetriNetUnfolderBase]: 3014/4631 cut-off events. [2024-06-14 12:57:48,467 INFO L125 PetriNetUnfolderBase]: For 298757/298757 co-relation queries the response was YES. [2024-06-14 12:57:48,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36835 conditions, 4631 events. 3014/4631 cut-off events. For 298757/298757 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24644 event pairs, 677 based on Foata normal form. 1/4630 useless extension candidates. Maximal degree in co-relation 36731. Up to 4549 conditions per place. [2024-06-14 12:57:48,517 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 32 changer transitions 0/299 dead transitions. [2024-06-14 12:57:48,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 299 transitions, 4456 flow [2024-06-14 12:57:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:57:48,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 12:57:48,518 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 3527 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:57:48,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 299 transitions, 4456 flow [2024-06-14 12:57:48,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 299 transitions, 4360 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:48,886 INFO L231 Difference]: Finished difference. Result has 217 places, 280 transitions, 3695 flow [2024-06-14 12:57:48,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3695, PETRI_PLACES=217, PETRI_TRANSITIONS=280} [2024-06-14 12:57:48,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-14 12:57:48,887 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 280 transitions, 3695 flow [2024-06-14 12:57:48,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:48,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:48,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:48,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:57:48,887 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:48,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:48,887 INFO L85 PathProgramCache]: Analyzing trace with hash 75619665, now seen corresponding path program 2 times [2024-06-14 12:57:48,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:48,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338115826] [2024-06-14 12:57:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:48,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:49,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:49,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338115826] [2024-06-14 12:57:49,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338115826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:49,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:49,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:49,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289834301] [2024-06-14 12:57:49,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:49,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:49,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:49,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:49,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:49,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:49,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 280 transitions, 3695 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:49,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:49,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:49,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:50,493 INFO L124 PetriNetUnfolderBase]: 3011/4627 cut-off events. [2024-06-14 12:57:50,493 INFO L125 PetriNetUnfolderBase]: For 307215/307215 co-relation queries the response was YES. [2024-06-14 12:57:50,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36940 conditions, 4627 events. 3011/4627 cut-off events. For 307215/307215 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24653 event pairs, 675 based on Foata normal form. 1/4626 useless extension candidates. Maximal degree in co-relation 36833. Up to 4573 conditions per place. [2024-06-14 12:57:50,538 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 270 selfloop transitions, 22 changer transitions 0/295 dead transitions. [2024-06-14 12:57:50,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 295 transitions, 4335 flow [2024-06-14 12:57:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 12:57:50,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-14 12:57:50,539 INFO L175 Difference]: Start difference. First operand has 217 places, 280 transitions, 3695 flow. Second operand 7 states and 108 transitions. [2024-06-14 12:57:50,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 295 transitions, 4335 flow [2024-06-14 12:57:50,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 295 transitions, 4265 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 12:57:50,968 INFO L231 Difference]: Finished difference. Result has 221 places, 280 transitions, 3675 flow [2024-06-14 12:57:50,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3675, PETRI_PLACES=221, PETRI_TRANSITIONS=280} [2024-06-14 12:57:50,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 12:57:50,969 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 280 transitions, 3675 flow [2024-06-14 12:57:50,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:50,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:50,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:50,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:57:50,969 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:50,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:50,970 INFO L85 PathProgramCache]: Analyzing trace with hash -197309381, now seen corresponding path program 4 times [2024-06-14 12:57:50,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:50,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601092650] [2024-06-14 12:57:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:50,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:52,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:52,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601092650] [2024-06-14 12:57:52,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601092650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:52,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:52,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:57:52,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646187704] [2024-06-14 12:57:52,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:52,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:57:52,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:57:52,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:57:52,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:52,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 280 transitions, 3675 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 12:57:52,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:52,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:52,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:53,491 INFO L124 PetriNetUnfolderBase]: 3052/4701 cut-off events. [2024-06-14 12:57:53,491 INFO L125 PetriNetUnfolderBase]: For 331405/331425 co-relation queries the response was YES. [2024-06-14 12:57:53,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37562 conditions, 4701 events. 3052/4701 cut-off events. For 331405/331425 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25155 event pairs, 660 based on Foata normal form. 19/4714 useless extension candidates. Maximal degree in co-relation 37453. Up to 4235 conditions per place. [2024-06-14 12:57:53,534 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 253 selfloop transitions, 59 changer transitions 0/315 dead transitions. [2024-06-14 12:57:53,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 315 transitions, 4478 flow [2024-06-14 12:57:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:57:53,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 12:57:53,536 INFO L175 Difference]: Start difference. First operand has 221 places, 280 transitions, 3675 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:57:53,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 315 transitions, 4478 flow [2024-06-14 12:57:53,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 315 transitions, 4406 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:53,978 INFO L231 Difference]: Finished difference. Result has 225 places, 281 transitions, 3768 flow [2024-06-14 12:57:53,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3603, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3768, PETRI_PLACES=225, PETRI_TRANSITIONS=281} [2024-06-14 12:57:53,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-14 12:57:53,979 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 281 transitions, 3768 flow [2024-06-14 12:57:53,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 12:57:53,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:53,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:53,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:57:53,979 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:53,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1689667709, now seen corresponding path program 5 times [2024-06-14 12:57:53,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:53,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633559739] [2024-06-14 12:57:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:53,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:55,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:55,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633559739] [2024-06-14 12:57:55,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633559739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:55,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:55,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:55,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331318068] [2024-06-14 12:57:55,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:55,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:55,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:55,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:55,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:55,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:55,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 281 transitions, 3768 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:55,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:55,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:55,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:56,082 INFO L124 PetriNetUnfolderBase]: 3032/4669 cut-off events. [2024-06-14 12:57:56,082 INFO L125 PetriNetUnfolderBase]: For 331351/331371 co-relation queries the response was YES. [2024-06-14 12:57:56,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37284 conditions, 4669 events. 3032/4669 cut-off events. For 331351/331371 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24984 event pairs, 606 based on Foata normal form. 19/4682 useless extension candidates. Maximal degree in co-relation 37174. Up to 3950 conditions per place. [2024-06-14 12:57:56,135 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 239 selfloop transitions, 69 changer transitions 0/311 dead transitions. [2024-06-14 12:57:56,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 311 transitions, 4512 flow [2024-06-14 12:57:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:57:56,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:57:56,137 INFO L175 Difference]: Start difference. First operand has 225 places, 281 transitions, 3768 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:57:56,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 311 transitions, 4512 flow [2024-06-14 12:57:56,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 311 transitions, 4378 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:56,541 INFO L231 Difference]: Finished difference. Result has 228 places, 282 transitions, 3819 flow [2024-06-14 12:57:56,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3819, PETRI_PLACES=228, PETRI_TRANSITIONS=282} [2024-06-14 12:57:56,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-14 12:57:56,542 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 282 transitions, 3819 flow [2024-06-14 12:57:56,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:56,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:56,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:56,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:57:56,543 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:56,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:56,543 INFO L85 PathProgramCache]: Analyzing trace with hash 438586383, now seen corresponding path program 6 times [2024-06-14 12:57:56,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:56,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408855373] [2024-06-14 12:57:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:56,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:57,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408855373] [2024-06-14 12:57:57,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408855373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:57,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:57,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:57:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123260514] [2024-06-14 12:57:57,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:57,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:57:57,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:57:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:57:57,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:57,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 282 transitions, 3819 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 12:57:57,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:57,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:57,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:58,801 INFO L124 PetriNetUnfolderBase]: 3012/4637 cut-off events. [2024-06-14 12:57:58,801 INFO L125 PetriNetUnfolderBase]: For 327077/327097 co-relation queries the response was YES. [2024-06-14 12:57:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36805 conditions, 4637 events. 3012/4637 cut-off events. For 327077/327097 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24684 event pairs, 612 based on Foata normal form. 19/4650 useless extension candidates. Maximal degree in co-relation 36693. Up to 3903 conditions per place. [2024-06-14 12:57:58,851 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 237 selfloop transitions, 80 changer transitions 0/320 dead transitions. [2024-06-14 12:57:58,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 320 transitions, 4621 flow [2024-06-14 12:57:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:57:58,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 12:57:58,852 INFO L175 Difference]: Start difference. First operand has 228 places, 282 transitions, 3819 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:57:58,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 320 transitions, 4621 flow [2024-06-14 12:57:59,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 320 transitions, 4303 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 12:57:59,397 INFO L231 Difference]: Finished difference. Result has 229 places, 282 transitions, 3667 flow [2024-06-14 12:57:59,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3667, PETRI_PLACES=229, PETRI_TRANSITIONS=282} [2024-06-14 12:57:59,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-14 12:57:59,397 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 282 transitions, 3667 flow [2024-06-14 12:57:59,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 12:57:59,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:59,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:59,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:57:59,398 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:59,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:59,398 INFO L85 PathProgramCache]: Analyzing trace with hash 152931178, now seen corresponding path program 2 times [2024-06-14 12:57:59,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:59,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919694065] [2024-06-14 12:57:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:00,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:00,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919694065] [2024-06-14 12:58:00,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919694065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:00,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:00,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:00,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638845631] [2024-06-14 12:58:00,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:00,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:00,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:00,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:00,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:00,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 282 transitions, 3667 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:00,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:00,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:00,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:01,290 INFO L124 PetriNetUnfolderBase]: 3064/4705 cut-off events. [2024-06-14 12:58:01,290 INFO L125 PetriNetUnfolderBase]: For 320974/320974 co-relation queries the response was YES. [2024-06-14 12:58:01,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36614 conditions, 4705 events. 3064/4705 cut-off events. For 320974/320974 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25064 event pairs, 657 based on Foata normal form. 4/4707 useless extension candidates. Maximal degree in co-relation 36503. Up to 4453 conditions per place. [2024-06-14 12:58:01,344 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 251 selfloop transitions, 59 changer transitions 0/313 dead transitions. [2024-06-14 12:58:01,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 4699 flow [2024-06-14 12:58:01,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:58:01,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:58:01,346 INFO L175 Difference]: Start difference. First operand has 229 places, 282 transitions, 3667 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:58:01,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 4699 flow [2024-06-14 12:58:01,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 313 transitions, 4503 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:58:01,862 INFO L231 Difference]: Finished difference. Result has 229 places, 288 transitions, 3687 flow [2024-06-14 12:58:01,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3687, PETRI_PLACES=229, PETRI_TRANSITIONS=288} [2024-06-14 12:58:01,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-14 12:58:01,863 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 288 transitions, 3687 flow [2024-06-14 12:58:01,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:01,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:01,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:01,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:58:01,863 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:01,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1902242030, now seen corresponding path program 3 times [2024-06-14 12:58:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:01,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115332867] [2024-06-14 12:58:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:02,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:02,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115332867] [2024-06-14 12:58:02,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115332867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:02,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:02,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:02,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959744693] [2024-06-14 12:58:02,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:02,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:02,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:02,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:02,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:02,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 288 transitions, 3687 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:02,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:02,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:02,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:03,629 INFO L124 PetriNetUnfolderBase]: 3052/4689 cut-off events. [2024-06-14 12:58:03,629 INFO L125 PetriNetUnfolderBase]: For 324336/324336 co-relation queries the response was YES. [2024-06-14 12:58:03,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36151 conditions, 4689 events. 3052/4689 cut-off events. For 324336/324336 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24989 event pairs, 657 based on Foata normal form. 4/4691 useless extension candidates. Maximal degree in co-relation 36039. Up to 4445 conditions per place. [2024-06-14 12:58:03,683 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 58 changer transitions 0/313 dead transitions. [2024-06-14 12:58:03,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 4525 flow [2024-06-14 12:58:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:58:03,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 12:58:03,684 INFO L175 Difference]: Start difference. First operand has 229 places, 288 transitions, 3687 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:58:03,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 4525 flow [2024-06-14 12:58:04,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 313 transitions, 4387 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:04,043 INFO L231 Difference]: Finished difference. Result has 233 places, 288 transitions, 3671 flow [2024-06-14 12:58:04,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3549, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3671, PETRI_PLACES=233, PETRI_TRANSITIONS=288} [2024-06-14 12:58:04,044 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-14 12:58:04,044 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 288 transitions, 3671 flow [2024-06-14 12:58:04,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:04,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:04,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:04,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:58:04,044 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:04,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:04,045 INFO L85 PathProgramCache]: Analyzing trace with hash -494112555, now seen corresponding path program 3 times [2024-06-14 12:58:04,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:04,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820220915] [2024-06-14 12:58:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:04,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:04,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:04,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820220915] [2024-06-14 12:58:04,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820220915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:04,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:04,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:58:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728060313] [2024-06-14 12:58:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:04,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:58:04,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:04,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:58:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:58:04,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:04,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 288 transitions, 3671 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:04,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:04,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:04,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:05,587 INFO L124 PetriNetUnfolderBase]: 3054/4695 cut-off events. [2024-06-14 12:58:05,587 INFO L125 PetriNetUnfolderBase]: For 330885/330907 co-relation queries the response was YES. [2024-06-14 12:58:05,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36165 conditions, 4695 events. 3054/4695 cut-off events. For 330885/330907 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25064 event pairs, 677 based on Foata normal form. 18/4709 useless extension candidates. Maximal degree in co-relation 36052. Up to 4494 conditions per place. [2024-06-14 12:58:05,638 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 65 changer transitions 0/313 dead transitions. [2024-06-14 12:58:05,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 313 transitions, 4682 flow [2024-06-14 12:58:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:58:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:58:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:58:05,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 12:58:05,640 INFO L175 Difference]: Start difference. First operand has 233 places, 288 transitions, 3671 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:58:05,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 313 transitions, 4682 flow [2024-06-14 12:58:06,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 313 transitions, 4558 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:06,177 INFO L231 Difference]: Finished difference. Result has 234 places, 295 transitions, 3828 flow [2024-06-14 12:58:06,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3828, PETRI_PLACES=234, PETRI_TRANSITIONS=295} [2024-06-14 12:58:06,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-14 12:58:06,177 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 295 transitions, 3828 flow [2024-06-14 12:58:06,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:06,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:06,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:06,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:58:06,178 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:06,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:06,178 INFO L85 PathProgramCache]: Analyzing trace with hash -493784265, now seen corresponding path program 4 times [2024-06-14 12:58:06,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:06,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69735380] [2024-06-14 12:58:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:06,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:06,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69735380] [2024-06-14 12:58:06,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69735380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:06,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:06,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:58:06,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167994186] [2024-06-14 12:58:06,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:06,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:58:06,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:58:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:58:06,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:06,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 295 transitions, 3828 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:06,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:06,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:06,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:07,872 INFO L124 PetriNetUnfolderBase]: 3030/4660 cut-off events. [2024-06-14 12:58:07,872 INFO L125 PetriNetUnfolderBase]: For 337360/337360 co-relation queries the response was YES. [2024-06-14 12:58:07,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35915 conditions, 4660 events. 3030/4660 cut-off events. For 337360/337360 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24884 event pairs, 661 based on Foata normal form. 6/4664 useless extension candidates. Maximal degree in co-relation 35800. Up to 4557 conditions per place. [2024-06-14 12:58:07,923 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 270 selfloop transitions, 40 changer transitions 0/313 dead transitions. [2024-06-14 12:58:07,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 313 transitions, 4524 flow [2024-06-14 12:58:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:58:07,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 12:58:07,924 INFO L175 Difference]: Start difference. First operand has 234 places, 295 transitions, 3828 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:58:07,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 313 transitions, 4524 flow [2024-06-14 12:58:08,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 313 transitions, 4304 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-14 12:58:08,501 INFO L231 Difference]: Finished difference. Result has 239 places, 295 transitions, 3702 flow [2024-06-14 12:58:08,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3702, PETRI_PLACES=239, PETRI_TRANSITIONS=295} [2024-06-14 12:58:08,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 12:58:08,502 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 295 transitions, 3702 flow [2024-06-14 12:58:08,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:08,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:08,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:58:08,503 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:08,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:08,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1069320801, now seen corresponding path program 5 times [2024-06-14 12:58:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:08,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492337577] [2024-06-14 12:58:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492337577] [2024-06-14 12:58:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492337577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:09,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:09,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:58:09,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141719630] [2024-06-14 12:58:09,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:09,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:58:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:58:09,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:58:09,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:09,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 295 transitions, 3702 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:09,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:09,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:09,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:10,053 INFO L124 PetriNetUnfolderBase]: 3037/4670 cut-off events. [2024-06-14 12:58:10,053 INFO L125 PetriNetUnfolderBase]: For 340435/340435 co-relation queries the response was YES. [2024-06-14 12:58:10,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35852 conditions, 4670 events. 3037/4670 cut-off events. For 340435/340435 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24950 event pairs, 668 based on Foata normal form. 3/4671 useless extension candidates. Maximal degree in co-relation 35736. Up to 4591 conditions per place. [2024-06-14 12:58:10,106 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 33 changer transitions 0/316 dead transitions. [2024-06-14 12:58:10,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 316 transitions, 4462 flow [2024-06-14 12:58:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:58:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:58:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 12:58:10,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 12:58:10,107 INFO L175 Difference]: Start difference. First operand has 239 places, 295 transitions, 3702 flow. Second operand 6 states and 105 transitions. [2024-06-14 12:58:10,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 316 transitions, 4462 flow [2024-06-14 12:58:10,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 316 transitions, 4362 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:10,616 INFO L231 Difference]: Finished difference. Result has 238 places, 298 transitions, 3752 flow [2024-06-14 12:58:10,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3752, PETRI_PLACES=238, PETRI_TRANSITIONS=298} [2024-06-14 12:58:10,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-14 12:58:10,617 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 298 transitions, 3752 flow [2024-06-14 12:58:10,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:10,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:10,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:10,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:58:10,617 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:10,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash -38498571, now seen corresponding path program 6 times [2024-06-14 12:58:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:10,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896870386] [2024-06-14 12:58:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:10,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:11,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:11,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896870386] [2024-06-14 12:58:11,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896870386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:11,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:11,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:58:11,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138935203] [2024-06-14 12:58:11,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:11,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:58:11,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:11,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:58:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:58:11,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:11,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 298 transitions, 3752 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:11,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:11,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:11,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:12,190 INFO L124 PetriNetUnfolderBase]: 3013/4637 cut-off events. [2024-06-14 12:58:12,190 INFO L125 PetriNetUnfolderBase]: For 346011/346011 co-relation queries the response was YES. [2024-06-14 12:58:12,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35407 conditions, 4637 events. 3013/4637 cut-off events. For 346011/346011 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24755 event pairs, 665 based on Foata normal form. 6/4641 useless extension candidates. Maximal degree in co-relation 35290. Up to 4444 conditions per place. [2024-06-14 12:58:12,241 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 260 selfloop transitions, 59 changer transitions 0/322 dead transitions. [2024-06-14 12:58:12,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 322 transitions, 4493 flow [2024-06-14 12:58:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:58:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:58:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:58:12,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-14 12:58:12,242 INFO L175 Difference]: Start difference. First operand has 238 places, 298 transitions, 3752 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:58:12,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 322 transitions, 4493 flow [2024-06-14 12:58:12,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 322 transitions, 4339 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:12,727 INFO L231 Difference]: Finished difference. Result has 242 places, 299 transitions, 3781 flow [2024-06-14 12:58:12,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3781, PETRI_PLACES=242, PETRI_TRANSITIONS=299} [2024-06-14 12:58:12,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 12:58:12,727 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 299 transitions, 3781 flow [2024-06-14 12:58:12,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:12,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:12,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:12,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:58:12,728 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:12,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2102794285, now seen corresponding path program 7 times [2024-06-14 12:58:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:12,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281678774] [2024-06-14 12:58:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:12,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:13,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:13,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281678774] [2024-06-14 12:58:13,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281678774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:13,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:13,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:13,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320293174] [2024-06-14 12:58:13,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:13,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:13,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:13,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:13,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:13,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:13,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 299 transitions, 3781 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:13,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:13,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:13,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:14,977 INFO L124 PetriNetUnfolderBase]: 2993/4608 cut-off events. [2024-06-14 12:58:14,978 INFO L125 PetriNetUnfolderBase]: For 346253/346273 co-relation queries the response was YES. [2024-06-14 12:58:15,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34905 conditions, 4608 events. 2993/4608 cut-off events. For 346253/346273 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24546 event pairs, 629 based on Foata normal form. 19/4621 useless extension candidates. Maximal degree in co-relation 34786. Up to 4124 conditions per place. [2024-06-14 12:58:15,034 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 58 changer transitions 0/327 dead transitions. [2024-06-14 12:58:15,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 327 transitions, 4465 flow [2024-06-14 12:58:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:58:15,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 12:58:15,036 INFO L175 Difference]: Start difference. First operand has 242 places, 299 transitions, 3781 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:58:15,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 327 transitions, 4465 flow [2024-06-14 12:58:15,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 327 transitions, 4333 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:15,550 INFO L231 Difference]: Finished difference. Result has 243 places, 298 transitions, 3687 flow [2024-06-14 12:58:15,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3687, PETRI_PLACES=243, PETRI_TRANSITIONS=298} [2024-06-14 12:58:15,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-14 12:58:15,551 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 298 transitions, 3687 flow [2024-06-14 12:58:15,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:15,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:15,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:15,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:58:15,551 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:15,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash -205086924, now seen corresponding path program 4 times [2024-06-14 12:58:15,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:15,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192772932] [2024-06-14 12:58:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:15,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:16,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:16,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192772932] [2024-06-14 12:58:16,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192772932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:16,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:16,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989758984] [2024-06-14 12:58:16,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:16,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:16,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:16,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:16,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:16,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:16,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 298 transitions, 3687 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:16,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:16,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:16,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:17,289 INFO L124 PetriNetUnfolderBase]: 3013/4632 cut-off events. [2024-06-14 12:58:17,289 INFO L125 PetriNetUnfolderBase]: For 305861/305861 co-relation queries the response was YES. [2024-06-14 12:58:17,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34333 conditions, 4632 events. 3013/4632 cut-off events. For 305861/305861 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24662 event pairs, 639 based on Foata normal form. 4/4634 useless extension candidates. Maximal degree in co-relation 34215. Up to 4453 conditions per place. [2024-06-14 12:58:17,340 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 275 selfloop transitions, 45 changer transitions 0/323 dead transitions. [2024-06-14 12:58:17,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 323 transitions, 4582 flow [2024-06-14 12:58:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:58:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:58:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:58:17,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:58:17,342 INFO L175 Difference]: Start difference. First operand has 243 places, 298 transitions, 3687 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:58:17,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 323 transitions, 4582 flow [2024-06-14 12:58:17,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 323 transitions, 4372 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 12:58:17,915 INFO L231 Difference]: Finished difference. Result has 242 places, 301 transitions, 3620 flow [2024-06-14 12:58:17,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3477, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3620, PETRI_PLACES=242, PETRI_TRANSITIONS=301} [2024-06-14 12:58:17,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 12:58:17,916 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 301 transitions, 3620 flow [2024-06-14 12:58:17,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:17,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:17,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:17,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:58:17,916 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:17,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1069324428, now seen corresponding path program 5 times [2024-06-14 12:58:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125761963] [2024-06-14 12:58:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:18,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:18,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125761963] [2024-06-14 12:58:18,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125761963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:18,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:18,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:18,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951528155] [2024-06-14 12:58:18,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:18,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:18,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:18,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:18,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:18,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:18,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 301 transitions, 3620 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:18,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:18,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:18,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:19,629 INFO L124 PetriNetUnfolderBase]: 3001/4618 cut-off events. [2024-06-14 12:58:19,630 INFO L125 PetriNetUnfolderBase]: For 307913/307913 co-relation queries the response was YES. [2024-06-14 12:58:19,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33634 conditions, 4618 events. 3001/4618 cut-off events. For 307913/307913 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24609 event pairs, 640 based on Foata normal form. 4/4620 useless extension candidates. Maximal degree in co-relation 33516. Up to 4445 conditions per place. [2024-06-14 12:58:19,684 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 274 selfloop transitions, 49 changer transitions 0/326 dead transitions. [2024-06-14 12:58:19,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 326 transitions, 4372 flow [2024-06-14 12:58:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:58:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:58:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:58:19,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:58:19,685 INFO L175 Difference]: Start difference. First operand has 242 places, 301 transitions, 3620 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:58:19,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 326 transitions, 4372 flow [2024-06-14 12:58:20,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 326 transitions, 4195 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 12:58:20,104 INFO L231 Difference]: Finished difference. Result has 244 places, 301 transitions, 3547 flow [2024-06-14 12:58:20,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3547, PETRI_PLACES=244, PETRI_TRANSITIONS=301} [2024-06-14 12:58:20,105 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-14 12:58:20,105 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 301 transitions, 3547 flow [2024-06-14 12:58:20,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:20,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:20,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:20,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:58:20,105 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:20,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash -486486059, now seen corresponding path program 1 times [2024-06-14 12:58:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:20,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358071680] [2024-06-14 12:58:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:20,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358071680] [2024-06-14 12:58:20,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358071680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:20,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:20,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:20,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381925322] [2024-06-14 12:58:20,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:20,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:21,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:21,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 301 transitions, 3547 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:21,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:21,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:21,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:21,940 INFO L124 PetriNetUnfolderBase]: 3019/4644 cut-off events. [2024-06-14 12:58:21,941 INFO L125 PetriNetUnfolderBase]: For 314867/314889 co-relation queries the response was YES. [2024-06-14 12:58:21,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33865 conditions, 4644 events. 3019/4644 cut-off events. For 314867/314889 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 24748 event pairs, 657 based on Foata normal form. 18/4658 useless extension candidates. Maximal degree in co-relation 33746. Up to 4408 conditions per place. [2024-06-14 12:58:21,996 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 248 selfloop transitions, 82 changer transitions 0/333 dead transitions. [2024-06-14 12:58:21,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 333 transitions, 4765 flow [2024-06-14 12:58:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:58:21,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:58:21,997 INFO L175 Difference]: Start difference. First operand has 244 places, 301 transitions, 3547 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:58:21,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 333 transitions, 4765 flow [2024-06-14 12:58:22,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 333 transitions, 4626 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:22,562 INFO L231 Difference]: Finished difference. Result has 246 places, 309 transitions, 3704 flow [2024-06-14 12:58:22,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3704, PETRI_PLACES=246, PETRI_TRANSITIONS=309} [2024-06-14 12:58:22,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 12:58:22,563 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 309 transitions, 3704 flow [2024-06-14 12:58:22,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:22,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:22,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:22,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:58:22,563 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:22,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -486395694, now seen corresponding path program 1 times [2024-06-14 12:58:22,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:22,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684850110] [2024-06-14 12:58:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:22,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:23,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:23,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684850110] [2024-06-14 12:58:23,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684850110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:23,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:23,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:23,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64092957] [2024-06-14 12:58:23,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:23,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:23,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:23,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:23,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:23,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:23,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 309 transitions, 3704 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:23,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:23,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:23,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:24,305 INFO L124 PetriNetUnfolderBase]: 3079/4727 cut-off events. [2024-06-14 12:58:24,305 INFO L125 PetriNetUnfolderBase]: For 339992/340014 co-relation queries the response was YES. [2024-06-14 12:58:24,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35677 conditions, 4727 events. 3079/4727 cut-off events. For 339992/340014 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25213 event pairs, 646 based on Foata normal form. 20/4743 useless extension candidates. Maximal degree in co-relation 35557. Up to 4330 conditions per place. [2024-06-14 12:58:24,350 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 243 selfloop transitions, 102 changer transitions 0/348 dead transitions. [2024-06-14 12:58:24,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 348 transitions, 5030 flow [2024-06-14 12:58:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:58:24,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:58:24,359 INFO L175 Difference]: Start difference. First operand has 246 places, 309 transitions, 3704 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:58:24,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 348 transitions, 5030 flow [2024-06-14 12:58:24,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 348 transitions, 4891 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:24,941 INFO L231 Difference]: Finished difference. Result has 252 places, 326 transitions, 4191 flow [2024-06-14 12:58:24,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4191, PETRI_PLACES=252, PETRI_TRANSITIONS=326} [2024-06-14 12:58:24,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-14 12:58:24,941 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 326 transitions, 4191 flow [2024-06-14 12:58:24,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:24,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:24,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:24,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:58:24,942 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:24,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash 481037117, now seen corresponding path program 2 times [2024-06-14 12:58:24,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:24,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77162407] [2024-06-14 12:58:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:24,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:25,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:25,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77162407] [2024-06-14 12:58:25,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77162407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:25,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:25,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:25,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257118328] [2024-06-14 12:58:25,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:25,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:25,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:25,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:25,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 326 transitions, 4191 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:25,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:25,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:25,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:26,914 INFO L124 PetriNetUnfolderBase]: 3295/5025 cut-off events. [2024-06-14 12:58:26,914 INFO L125 PetriNetUnfolderBase]: For 405600/405600 co-relation queries the response was YES. [2024-06-14 12:58:26,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40199 conditions, 5025 events. 3295/5025 cut-off events. For 405600/405600 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26860 event pairs, 643 based on Foata normal form. 12/5035 useless extension candidates. Maximal degree in co-relation 40075. Up to 4737 conditions per place. [2024-06-14 12:58:26,974 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 310 selfloop transitions, 61 changer transitions 0/374 dead transitions. [2024-06-14 12:58:26,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 374 transitions, 5795 flow [2024-06-14 12:58:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:58:26,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 12:58:26,975 INFO L175 Difference]: Start difference. First operand has 252 places, 326 transitions, 4191 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:58:26,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 374 transitions, 5795 flow [2024-06-14 12:58:27,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 374 transitions, 5628 flow, removed 80 selfloop flow, removed 2 redundant places. [2024-06-14 12:58:27,598 INFO L231 Difference]: Finished difference. Result has 259 places, 348 transitions, 4563 flow [2024-06-14 12:58:27,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4563, PETRI_PLACES=259, PETRI_TRANSITIONS=348} [2024-06-14 12:58:27,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-14 12:58:27,599 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 348 transitions, 4563 flow [2024-06-14 12:58:27,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:27,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:27,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:27,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:58:27,599 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:27,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash -482676624, now seen corresponding path program 2 times [2024-06-14 12:58:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:27,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757650308] [2024-06-14 12:58:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:27,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:28,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:28,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757650308] [2024-06-14 12:58:28,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757650308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:28,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:28,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:28,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591505332] [2024-06-14 12:58:28,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:28,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:28,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:28,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:28,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 348 transitions, 4563 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:28,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:28,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:28,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:29,521 INFO L124 PetriNetUnfolderBase]: 3363/5119 cut-off events. [2024-06-14 12:58:29,522 INFO L125 PetriNetUnfolderBase]: For 415079/415079 co-relation queries the response was YES. [2024-06-14 12:58:29,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41737 conditions, 5119 events. 3363/5119 cut-off events. For 415079/415079 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27359 event pairs, 668 based on Foata normal form. 4/5121 useless extension candidates. Maximal degree in co-relation 41610. Up to 4969 conditions per place. [2024-06-14 12:58:29,588 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 327 selfloop transitions, 51 changer transitions 0/381 dead transitions. [2024-06-14 12:58:29,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 5920 flow [2024-06-14 12:58:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:58:29,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 12:58:29,589 INFO L175 Difference]: Start difference. First operand has 259 places, 348 transitions, 4563 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:58:29,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 5920 flow [2024-06-14 12:58:30,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 381 transitions, 5752 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-14 12:58:30,271 INFO L231 Difference]: Finished difference. Result has 266 places, 359 transitions, 4791 flow [2024-06-14 12:58:30,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4395, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4791, PETRI_PLACES=266, PETRI_TRANSITIONS=359} [2024-06-14 12:58:30,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-14 12:58:30,272 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 359 transitions, 4791 flow [2024-06-14 12:58:30,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:30,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:30,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:30,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:58:30,272 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:30,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash -38490480, now seen corresponding path program 3 times [2024-06-14 12:58:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:30,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854135581] [2024-06-14 12:58:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:30,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:30,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854135581] [2024-06-14 12:58:30,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854135581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:30,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:30,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:30,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837679936] [2024-06-14 12:58:30,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:30,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:30,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:31,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:31,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 359 transitions, 4791 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:31,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:31,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:31,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:32,075 INFO L124 PetriNetUnfolderBase]: 3431/5213 cut-off events. [2024-06-14 12:58:32,075 INFO L125 PetriNetUnfolderBase]: For 439182/439182 co-relation queries the response was YES. [2024-06-14 12:58:32,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43090 conditions, 5213 events. 3431/5213 cut-off events. For 439182/439182 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27859 event pairs, 710 based on Foata normal form. 4/5215 useless extension candidates. Maximal degree in co-relation 42960. Up to 4939 conditions per place. [2024-06-14 12:58:32,142 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 319 selfloop transitions, 76 changer transitions 0/398 dead transitions. [2024-06-14 12:58:32,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 398 transitions, 6233 flow [2024-06-14 12:58:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:58:32,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 12:58:32,143 INFO L175 Difference]: Start difference. First operand has 266 places, 359 transitions, 4791 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:58:32,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 398 transitions, 6233 flow [2024-06-14 12:58:32,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 398 transitions, 6095 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:32,966 INFO L231 Difference]: Finished difference. Result has 272 places, 371 transitions, 5177 flow [2024-06-14 12:58:32,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4653, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5177, PETRI_PLACES=272, PETRI_TRANSITIONS=371} [2024-06-14 12:58:32,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-14 12:58:32,967 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 371 transitions, 5177 flow [2024-06-14 12:58:32,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:32,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:32,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:32,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:58:32,967 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:32,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:32,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1063598945, now seen corresponding path program 3 times [2024-06-14 12:58:32,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:32,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265681338] [2024-06-14 12:58:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:32,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:33,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:33,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265681338] [2024-06-14 12:58:33,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265681338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:33,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:33,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:33,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146206864] [2024-06-14 12:58:33,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:33,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:33,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:33,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:33,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 371 transitions, 5177 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:33,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:33,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:33,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:35,258 INFO L124 PetriNetUnfolderBase]: 3667/5540 cut-off events. [2024-06-14 12:58:35,258 INFO L125 PetriNetUnfolderBase]: For 509313/509313 co-relation queries the response was YES. [2024-06-14 12:58:35,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47336 conditions, 5540 events. 3667/5540 cut-off events. For 509313/509313 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29756 event pairs, 692 based on Foata normal form. 12/5550 useless extension candidates. Maximal degree in co-relation 47202. Up to 4752 conditions per place. [2024-06-14 12:58:35,323 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 296 selfloop transitions, 128 changer transitions 0/427 dead transitions. [2024-06-14 12:58:35,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 427 transitions, 6823 flow [2024-06-14 12:58:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:58:35,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-14 12:58:35,324 INFO L175 Difference]: Start difference. First operand has 272 places, 371 transitions, 5177 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:58:35,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 427 transitions, 6823 flow [2024-06-14 12:58:36,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 427 transitions, 6707 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-14 12:58:36,109 INFO L231 Difference]: Finished difference. Result has 279 places, 390 transitions, 5760 flow [2024-06-14 12:58:36,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5760, PETRI_PLACES=279, PETRI_TRANSITIONS=390} [2024-06-14 12:58:36,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-14 12:58:36,110 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 390 transitions, 5760 flow [2024-06-14 12:58:36,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:36,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:36,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:36,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:58:36,110 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:36,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:36,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1055974433, now seen corresponding path program 1 times [2024-06-14 12:58:36,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:36,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497844715] [2024-06-14 12:58:36,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:36,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:37,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:37,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497844715] [2024-06-14 12:58:37,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497844715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:37,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:37,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:37,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424747179] [2024-06-14 12:58:37,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:37,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:37,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:37,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:37,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:37,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 390 transitions, 5760 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:37,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:37,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:37,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:38,421 INFO L124 PetriNetUnfolderBase]: 3664/5537 cut-off events. [2024-06-14 12:58:38,421 INFO L125 PetriNetUnfolderBase]: For 507776/507776 co-relation queries the response was YES. [2024-06-14 12:58:38,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49072 conditions, 5537 events. 3664/5537 cut-off events. For 507776/507776 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29744 event pairs, 737 based on Foata normal form. 1/5536 useless extension candidates. Maximal degree in co-relation 48935. Up to 5472 conditions per place. [2024-06-14 12:58:38,487 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 370 selfloop transitions, 29 changer transitions 0/402 dead transitions. [2024-06-14 12:58:38,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 402 transitions, 6612 flow [2024-06-14 12:58:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:58:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:58:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-14 12:58:38,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-14 12:58:38,488 INFO L175 Difference]: Start difference. First operand has 279 places, 390 transitions, 5760 flow. Second operand 5 states and 86 transitions. [2024-06-14 12:58:38,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 402 transitions, 6612 flow [2024-06-14 12:58:39,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 402 transitions, 6419 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-14 12:58:39,590 INFO L231 Difference]: Finished difference. Result has 281 places, 390 transitions, 5649 flow [2024-06-14 12:58:39,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5649, PETRI_PLACES=281, PETRI_TRANSITIONS=390} [2024-06-14 12:58:39,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-14 12:58:39,591 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 390 transitions, 5649 flow [2024-06-14 12:58:39,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:39,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:39,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:39,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:58:39,591 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:39,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:39,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1063593210, now seen corresponding path program 4 times [2024-06-14 12:58:39,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:39,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082296816] [2024-06-14 12:58:39,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:39,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:40,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:40,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082296816] [2024-06-14 12:58:40,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082296816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:40,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:40,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:40,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565810127] [2024-06-14 12:58:40,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:40,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:40,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:40,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:40,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:40,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 390 transitions, 5649 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:40,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:40,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:40,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:41,642 INFO L124 PetriNetUnfolderBase]: 3704/5593 cut-off events. [2024-06-14 12:58:41,642 INFO L125 PetriNetUnfolderBase]: For 531031/531031 co-relation queries the response was YES. [2024-06-14 12:58:41,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49697 conditions, 5593 events. 3704/5593 cut-off events. For 531031/531031 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30071 event pairs, 735 based on Foata normal form. 4/5595 useless extension candidates. Maximal degree in co-relation 49558. Up to 5461 conditions per place. [2024-06-14 12:58:41,719 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 371 selfloop transitions, 42 changer transitions 0/416 dead transitions. [2024-06-14 12:58:41,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 416 transitions, 6867 flow [2024-06-14 12:58:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:58:41,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:58:41,720 INFO L175 Difference]: Start difference. First operand has 281 places, 390 transitions, 5649 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:58:41,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 416 transitions, 6867 flow [2024-06-14 12:58:42,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 416 transitions, 6809 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:42,750 INFO L231 Difference]: Finished difference. Result has 286 places, 397 transitions, 5889 flow [2024-06-14 12:58:42,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5889, PETRI_PLACES=286, PETRI_TRANSITIONS=397} [2024-06-14 12:58:42,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-14 12:58:42,751 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 397 transitions, 5889 flow [2024-06-14 12:58:42,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:42,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:42,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:42,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:58:42,752 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:42,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash 867430913, now seen corresponding path program 1 times [2024-06-14 12:58:42,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:42,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591467012] [2024-06-14 12:58:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:42,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:43,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:43,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591467012] [2024-06-14 12:58:43,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591467012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:43,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:43,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:43,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003755328] [2024-06-14 12:58:43,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:43,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:43,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:43,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:43,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:43,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:43,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 397 transitions, 5889 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:43,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:43,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:43,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:44,660 INFO L124 PetriNetUnfolderBase]: 3746/5650 cut-off events. [2024-06-14 12:58:44,660 INFO L125 PetriNetUnfolderBase]: For 552860/552860 co-relation queries the response was YES. [2024-06-14 12:58:44,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50854 conditions, 5650 events. 3746/5650 cut-off events. For 552860/552860 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30411 event pairs, 757 based on Foata normal form. 2/5650 useless extension candidates. Maximal degree in co-relation 50713. Up to 5456 conditions per place. [2024-06-14 12:58:44,739 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 56 changer transitions 0/440 dead transitions. [2024-06-14 12:58:44,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 440 transitions, 7212 flow [2024-06-14 12:58:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:58:44,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:58:44,740 INFO L175 Difference]: Start difference. First operand has 286 places, 397 transitions, 5889 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:58:44,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 440 transitions, 7212 flow [2024-06-14 12:58:45,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 440 transitions, 6973 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:45,898 INFO L231 Difference]: Finished difference. Result has 290 places, 413 transitions, 6024 flow [2024-06-14 12:58:45,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6024, PETRI_PLACES=290, PETRI_TRANSITIONS=413} [2024-06-14 12:58:45,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-14 12:58:45,898 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 413 transitions, 6024 flow [2024-06-14 12:58:45,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:45,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:45,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:45,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:58:45,899 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:45,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:45,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1156801791, now seen corresponding path program 2 times [2024-06-14 12:58:45,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:45,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899064053] [2024-06-14 12:58:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:45,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:46,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:46,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899064053] [2024-06-14 12:58:46,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899064053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:46,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:46,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:46,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560852709] [2024-06-14 12:58:46,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:46,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:46,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:46,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:46,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 413 transitions, 6024 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:46,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:46,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:46,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:47,823 INFO L124 PetriNetUnfolderBase]: 3756/5665 cut-off events. [2024-06-14 12:58:47,823 INFO L125 PetriNetUnfolderBase]: For 569970/569970 co-relation queries the response was YES. [2024-06-14 12:58:47,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51487 conditions, 5665 events. 3756/5665 cut-off events. For 569970/569970 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30455 event pairs, 783 based on Foata normal form. 2/5665 useless extension candidates. Maximal degree in co-relation 51346. Up to 5532 conditions per place. [2024-06-14 12:58:47,902 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 47 changer transitions 0/439 dead transitions. [2024-06-14 12:58:47,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 439 transitions, 7052 flow [2024-06-14 12:58:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:58:47,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 12:58:47,903 INFO L175 Difference]: Start difference. First operand has 290 places, 413 transitions, 6024 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:58:47,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 439 transitions, 7052 flow [2024-06-14 12:58:49,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 439 transitions, 6940 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-14 12:58:49,109 INFO L231 Difference]: Finished difference. Result has 296 places, 417 transitions, 6090 flow [2024-06-14 12:58:49,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6090, PETRI_PLACES=296, PETRI_TRANSITIONS=417} [2024-06-14 12:58:49,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 12:58:49,110 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 417 transitions, 6090 flow [2024-06-14 12:58:49,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:49,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:49,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:49,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:58:49,110 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:49,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash 864570977, now seen corresponding path program 1 times [2024-06-14 12:58:49,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:49,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328417652] [2024-06-14 12:58:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:49,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:50,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:50,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328417652] [2024-06-14 12:58:50,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328417652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:50,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:50,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:50,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053517163] [2024-06-14 12:58:50,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:50,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:50,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:50,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:50,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 417 transitions, 6090 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:50,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:50,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:50,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:51,479 INFO L124 PetriNetUnfolderBase]: 3764/5678 cut-off events. [2024-06-14 12:58:51,480 INFO L125 PetriNetUnfolderBase]: For 585391/585391 co-relation queries the response was YES. [2024-06-14 12:58:51,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51467 conditions, 5678 events. 3764/5678 cut-off events. For 585391/585391 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30529 event pairs, 663 based on Foata normal form. 2/5678 useless extension candidates. Maximal degree in co-relation 51324. Up to 5493 conditions per place. [2024-06-14 12:58:51,562 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 401 selfloop transitions, 44 changer transitions 0/448 dead transitions. [2024-06-14 12:58:51,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 448 transitions, 7292 flow [2024-06-14 12:58:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:58:51,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:58:51,563 INFO L175 Difference]: Start difference. First operand has 296 places, 417 transitions, 6090 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:58:51,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 448 transitions, 7292 flow [2024-06-14 12:58:52,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 448 transitions, 7182 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:52,707 INFO L231 Difference]: Finished difference. Result has 300 places, 421 transitions, 6153 flow [2024-06-14 12:58:52,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5980, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6153, PETRI_PLACES=300, PETRI_TRANSITIONS=421} [2024-06-14 12:58:52,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-14 12:58:52,707 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 421 transitions, 6153 flow [2024-06-14 12:58:52,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:52,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:52,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:58:52,707 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:52,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1165136637, now seen corresponding path program 2 times [2024-06-14 12:58:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:52,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577888924] [2024-06-14 12:58:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:52,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:53,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:53,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577888924] [2024-06-14 12:58:53,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577888924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:53,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:53,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:53,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390420268] [2024-06-14 12:58:53,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:53,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:53,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:53,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:53,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 421 transitions, 6153 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:53,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:53,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:53,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:55,085 INFO L124 PetriNetUnfolderBase]: 3772/5690 cut-off events. [2024-06-14 12:58:55,085 INFO L125 PetriNetUnfolderBase]: For 601545/601545 co-relation queries the response was YES. [2024-06-14 12:58:55,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51878 conditions, 5690 events. 3772/5690 cut-off events. For 601545/601545 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 30689 event pairs, 781 based on Foata normal form. 2/5690 useless extension candidates. Maximal degree in co-relation 51733. Up to 5556 conditions per place. [2024-06-14 12:58:55,166 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 398 selfloop transitions, 44 changer transitions 0/445 dead transitions. [2024-06-14 12:58:55,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 445 transitions, 7159 flow [2024-06-14 12:58:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:58:55,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 12:58:55,167 INFO L175 Difference]: Start difference. First operand has 300 places, 421 transitions, 6153 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:58:55,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 445 transitions, 7159 flow [2024-06-14 12:58:56,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 445 transitions, 7036 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:56,494 INFO L231 Difference]: Finished difference. Result has 304 places, 423 transitions, 6169 flow [2024-06-14 12:58:56,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6169, PETRI_PLACES=304, PETRI_TRANSITIONS=423} [2024-06-14 12:58:56,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 12:58:56,495 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 423 transitions, 6169 flow [2024-06-14 12:58:56,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:56,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:56,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:56,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:58:56,495 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:56,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1047224541, now seen corresponding path program 3 times [2024-06-14 12:58:56,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:56,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818680806] [2024-06-14 12:58:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:56,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:57,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:57,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818680806] [2024-06-14 12:58:57,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818680806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:57,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:57,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:57,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015851614] [2024-06-14 12:58:57,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:57,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:57,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:57,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:57,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:57,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:57,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 423 transitions, 6169 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:57,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:57,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:57,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:58,563 INFO L124 PetriNetUnfolderBase]: 3830/5768 cut-off events. [2024-06-14 12:58:58,564 INFO L125 PetriNetUnfolderBase]: For 632732/632732 co-relation queries the response was YES. [2024-06-14 12:58:58,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53169 conditions, 5768 events. 3830/5768 cut-off events. For 632732/632732 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31093 event pairs, 765 based on Foata normal form. 2/5768 useless extension candidates. Maximal degree in co-relation 53022. Up to 5458 conditions per place. [2024-06-14 12:58:58,638 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 85 changer transitions 0/465 dead transitions. [2024-06-14 12:58:58,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 465 transitions, 7775 flow [2024-06-14 12:58:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:58:58,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:58:58,639 INFO L175 Difference]: Start difference. First operand has 304 places, 423 transitions, 6169 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:58:58,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 465 transitions, 7775 flow [2024-06-14 12:58:59,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 465 transitions, 7678 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:59,754 INFO L231 Difference]: Finished difference. Result has 306 places, 438 transitions, 6550 flow [2024-06-14 12:58:59,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6072, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6550, PETRI_PLACES=306, PETRI_TRANSITIONS=438} [2024-06-14 12:58:59,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-14 12:58:59,754 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 438 transitions, 6550 flow [2024-06-14 12:58:59,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:59,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:59,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:59,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:58:59,755 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:59,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:59,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1046925825, now seen corresponding path program 1 times [2024-06-14 12:58:59,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:59,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509587028] [2024-06-14 12:58:59,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:59,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:00,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:00,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509587028] [2024-06-14 12:59:00,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509587028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:00,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:00,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020087673] [2024-06-14 12:59:00,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:00,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:00,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:00,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:00,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:00,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 438 transitions, 6550 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:00,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:00,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:00,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:01,857 INFO L124 PetriNetUnfolderBase]: 3835/5776 cut-off events. [2024-06-14 12:59:01,857 INFO L125 PetriNetUnfolderBase]: For 649884/649884 co-relation queries the response was YES. [2024-06-14 12:59:01,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54000 conditions, 5776 events. 3835/5776 cut-off events. For 649884/649884 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31177 event pairs, 796 based on Foata normal form. 1/5775 useless extension candidates. Maximal degree in co-relation 53852. Up to 5693 conditions per place. [2024-06-14 12:59:01,924 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 422 selfloop transitions, 35 changer transitions 0/460 dead transitions. [2024-06-14 12:59:01,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 460 transitions, 7606 flow [2024-06-14 12:59:01,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:01,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 12:59:01,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-14 12:59:01,925 INFO L175 Difference]: Start difference. First operand has 306 places, 438 transitions, 6550 flow. Second operand 8 states and 122 transitions. [2024-06-14 12:59:01,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 460 transitions, 7606 flow [2024-06-14 12:59:03,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 460 transitions, 7431 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-14 12:59:03,268 INFO L231 Difference]: Finished difference. Result has 311 places, 441 transitions, 6527 flow [2024-06-14 12:59:03,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6527, PETRI_PLACES=311, PETRI_TRANSITIONS=441} [2024-06-14 12:59:03,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-14 12:59:03,268 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 441 transitions, 6527 flow [2024-06-14 12:59:03,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:03,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:03,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:03,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:59:03,269 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:03,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1046926011, now seen corresponding path program 4 times [2024-06-14 12:59:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600895981] [2024-06-14 12:59:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:03,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:03,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600895981] [2024-06-14 12:59:03,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600895981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:03,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:03,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:03,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681865031] [2024-06-14 12:59:03,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:03,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:03,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:03,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:04,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:04,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 441 transitions, 6527 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:04,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:04,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:04,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:05,265 INFO L124 PetriNetUnfolderBase]: 3853/5800 cut-off events. [2024-06-14 12:59:05,266 INFO L125 PetriNetUnfolderBase]: For 667978/667978 co-relation queries the response was YES. [2024-06-14 12:59:05,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53980 conditions, 5800 events. 3853/5800 cut-off events. For 667978/667978 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 31284 event pairs, 761 based on Foata normal form. 2/5800 useless extension candidates. Maximal degree in co-relation 53830. Up to 5484 conditions per place. [2024-06-14 12:59:05,347 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 93 changer transitions 0/471 dead transitions. [2024-06-14 12:59:05,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 471 transitions, 7937 flow [2024-06-14 12:59:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:59:05,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:59:05,348 INFO L175 Difference]: Start difference. First operand has 311 places, 441 transitions, 6527 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:59:05,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 471 transitions, 7937 flow [2024-06-14 12:59:06,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 471 transitions, 7845 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:59:06,773 INFO L231 Difference]: Finished difference. Result has 314 places, 447 transitions, 6715 flow [2024-06-14 12:59:06,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6715, PETRI_PLACES=314, PETRI_TRANSITIONS=447} [2024-06-14 12:59:06,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-14 12:59:06,774 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 447 transitions, 6715 flow [2024-06-14 12:59:06,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:06,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:06,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:06,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:59:06,774 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:06,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1046925639, now seen corresponding path program 1 times [2024-06-14 12:59:06,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:06,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196728663] [2024-06-14 12:59:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:06,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:07,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:07,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196728663] [2024-06-14 12:59:07,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196728663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:07,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:07,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:07,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144483291] [2024-06-14 12:59:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:07,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:07,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:07,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:07,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:07,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 447 transitions, 6715 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:07,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:07,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:07,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:08,831 INFO L124 PetriNetUnfolderBase]: 3895/5859 cut-off events. [2024-06-14 12:59:08,831 INFO L125 PetriNetUnfolderBase]: For 700717/700717 co-relation queries the response was YES. [2024-06-14 12:59:08,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55404 conditions, 5859 events. 3895/5859 cut-off events. For 700717/700717 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31604 event pairs, 786 based on Foata normal form. 2/5859 useless extension candidates. Maximal degree in co-relation 55253. Up to 5733 conditions per place. [2024-06-14 12:59:08,916 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 424 selfloop transitions, 51 changer transitions 0/478 dead transitions. [2024-06-14 12:59:08,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 478 transitions, 8141 flow [2024-06-14 12:59:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:59:08,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:59:08,918 INFO L175 Difference]: Start difference. First operand has 314 places, 447 transitions, 6715 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:59:08,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 478 transitions, 8141 flow [2024-06-14 12:59:10,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 478 transitions, 7998 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:59:10,667 INFO L231 Difference]: Finished difference. Result has 319 places, 456 transitions, 6956 flow [2024-06-14 12:59:10,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6572, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6956, PETRI_PLACES=319, PETRI_TRANSITIONS=456} [2024-06-14 12:59:10,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 12:59:10,668 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 456 transitions, 6956 flow [2024-06-14 12:59:10,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:10,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:10,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:10,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:59:10,668 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:10,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:10,669 INFO L85 PathProgramCache]: Analyzing trace with hash -869794305, now seen corresponding path program 2 times [2024-06-14 12:59:10,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:10,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012007482] [2024-06-14 12:59:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:10,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:11,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:11,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012007482] [2024-06-14 12:59:11,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012007482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:11,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:11,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:11,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422465092] [2024-06-14 12:59:11,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:11,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:11,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:11,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:11,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:11,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:11,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 456 transitions, 6956 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:11,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:11,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:11,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:12,806 INFO L124 PetriNetUnfolderBase]: 3900/5866 cut-off events. [2024-06-14 12:59:12,806 INFO L125 PetriNetUnfolderBase]: For 716214/716214 co-relation queries the response was YES. [2024-06-14 12:59:12,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55687 conditions, 5866 events. 3900/5866 cut-off events. For 716214/716214 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31657 event pairs, 787 based on Foata normal form. 1/5865 useless extension candidates. Maximal degree in co-relation 55534. Up to 5809 conditions per place. [2024-06-14 12:59:12,890 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 447 selfloop transitions, 25 changer transitions 0/475 dead transitions. [2024-06-14 12:59:12,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 475 transitions, 8034 flow [2024-06-14 12:59:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:59:12,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-14 12:59:12,891 INFO L175 Difference]: Start difference. First operand has 319 places, 456 transitions, 6956 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:59:12,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 475 transitions, 8034 flow [2024-06-14 12:59:14,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 475 transitions, 7905 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 12:59:14,604 INFO L231 Difference]: Finished difference. Result has 323 places, 459 transitions, 6965 flow [2024-06-14 12:59:14,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6965, PETRI_PLACES=323, PETRI_TRANSITIONS=459} [2024-06-14 12:59:14,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-14 12:59:14,605 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 459 transitions, 6965 flow [2024-06-14 12:59:14,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:14,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:14,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:14,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:59:14,606 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:14,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2123247089, now seen corresponding path program 5 times [2024-06-14 12:59:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:14,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130911799] [2024-06-14 12:59:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:14,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:15,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:15,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130911799] [2024-06-14 12:59:15,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130911799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:15,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:15,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:15,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194065213] [2024-06-14 12:59:15,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:15,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:15,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:15,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:15,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:15,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:15,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 459 transitions, 6965 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:15,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:15,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:15,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:16,656 INFO L124 PetriNetUnfolderBase]: 3894/5857 cut-off events. [2024-06-14 12:59:16,656 INFO L125 PetriNetUnfolderBase]: For 728270/728270 co-relation queries the response was YES. [2024-06-14 12:59:16,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55628 conditions, 5857 events. 3894/5857 cut-off events. For 728270/728270 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31580 event pairs, 778 based on Foata normal form. 2/5857 useless extension candidates. Maximal degree in co-relation 55474. Up to 5701 conditions per place. [2024-06-14 12:59:16,743 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 421 selfloop transitions, 55 changer transitions 0/479 dead transitions. [2024-06-14 12:59:16,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 479 transitions, 8150 flow [2024-06-14 12:59:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:59:16,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:59:16,744 INFO L175 Difference]: Start difference. First operand has 323 places, 459 transitions, 6965 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:59:16,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 479 transitions, 8150 flow [2024-06-14 12:59:18,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 479 transitions, 8056 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:59:18,350 INFO L231 Difference]: Finished difference. Result has 325 places, 459 transitions, 6987 flow [2024-06-14 12:59:18,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6871, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6987, PETRI_PLACES=325, PETRI_TRANSITIONS=459} [2024-06-14 12:59:18,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-14 12:59:18,351 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 459 transitions, 6987 flow [2024-06-14 12:59:18,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:18,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:18,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:18,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:59:18,351 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:18,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash -869914461, now seen corresponding path program 6 times [2024-06-14 12:59:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:18,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238081720] [2024-06-14 12:59:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:18,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:18,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:18,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238081720] [2024-06-14 12:59:18,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238081720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:18,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:18,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:18,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450978091] [2024-06-14 12:59:18,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:18,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:18,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:18,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:19,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:19,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 459 transitions, 6987 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:19,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:19,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:19,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:20,499 INFO L124 PetriNetUnfolderBase]: 3888/5849 cut-off events. [2024-06-14 12:59:20,499 INFO L125 PetriNetUnfolderBase]: For 740322/740322 co-relation queries the response was YES. [2024-06-14 12:59:20,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55700 conditions, 5849 events. 3888/5849 cut-off events. For 740322/740322 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31547 event pairs, 777 based on Foata normal form. 2/5849 useless extension candidates. Maximal degree in co-relation 55545. Up to 5717 conditions per place. [2024-06-14 12:59:20,573 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 45 changer transitions 0/477 dead transitions. [2024-06-14 12:59:20,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 477 transitions, 8008 flow [2024-06-14 12:59:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:59:20,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:59:20,574 INFO L175 Difference]: Start difference. First operand has 325 places, 459 transitions, 6987 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:59:20,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 477 transitions, 8008 flow [2024-06-14 12:59:22,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 477 transitions, 7869 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:59:22,105 INFO L231 Difference]: Finished difference. Result has 329 places, 460 transitions, 6959 flow [2024-06-14 12:59:22,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6959, PETRI_PLACES=329, PETRI_TRANSITIONS=460} [2024-06-14 12:59:22,105 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-14 12:59:22,105 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 460 transitions, 6959 flow [2024-06-14 12:59:22,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:22,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:22,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:22,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:59:22,106 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:22,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:22,106 INFO L85 PathProgramCache]: Analyzing trace with hash -869794119, now seen corresponding path program 2 times [2024-06-14 12:59:22,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:22,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458873702] [2024-06-14 12:59:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:22,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:22,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:22,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458873702] [2024-06-14 12:59:22,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458873702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:22,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:22,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:22,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609183883] [2024-06-14 12:59:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:22,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:22,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:22,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:22,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:22,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:22,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 460 transitions, 6959 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:22,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:22,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:22,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:24,208 INFO L124 PetriNetUnfolderBase]: 3898/5864 cut-off events. [2024-06-14 12:59:24,209 INFO L125 PetriNetUnfolderBase]: For 757210/757210 co-relation queries the response was YES. [2024-06-14 12:59:24,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56017 conditions, 5864 events. 3898/5864 cut-off events. For 757210/757210 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31629 event pairs, 787 based on Foata normal form. 2/5864 useless extension candidates. Maximal degree in co-relation 55860. Up to 5783 conditions per place. [2024-06-14 12:59:24,295 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 442 selfloop transitions, 37 changer transitions 0/482 dead transitions. [2024-06-14 12:59:24,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 482 transitions, 8223 flow [2024-06-14 12:59:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:59:24,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-14 12:59:24,296 INFO L175 Difference]: Start difference. First operand has 329 places, 460 transitions, 6959 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:59:24,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 482 transitions, 8223 flow [2024-06-14 12:59:26,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 482 transitions, 8135 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:59:26,070 INFO L231 Difference]: Finished difference. Result has 333 places, 463 transitions, 7025 flow [2024-06-14 12:59:26,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6871, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7025, PETRI_PLACES=333, PETRI_TRANSITIONS=463} [2024-06-14 12:59:26,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 12:59:26,071 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 463 transitions, 7025 flow [2024-06-14 12:59:26,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:26,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:26,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:26,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:59:26,071 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:26,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:26,072 INFO L85 PathProgramCache]: Analyzing trace with hash -675657429, now seen corresponding path program 3 times [2024-06-14 12:59:26,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:26,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594220766] [2024-06-14 12:59:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:26,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:26,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:26,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594220766] [2024-06-14 12:59:26,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594220766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:26,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:26,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:26,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113022853] [2024-06-14 12:59:26,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:26,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:26,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:26,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:26,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:26,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 463 transitions, 7025 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:26,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:26,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:26,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:28,227 INFO L124 PetriNetUnfolderBase]: 3892/5856 cut-off events. [2024-06-14 12:59:28,227 INFO L125 PetriNetUnfolderBase]: For 769061/769061 co-relation queries the response was YES. [2024-06-14 12:59:28,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55974 conditions, 5856 events. 3892/5856 cut-off events. For 769061/769061 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31545 event pairs, 797 based on Foata normal form. 2/5856 useless extension candidates. Maximal degree in co-relation 55816. Up to 5787 conditions per place. [2024-06-14 12:59:28,318 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 445 selfloop transitions, 32 changer transitions 0/480 dead transitions. [2024-06-14 12:59:28,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 480 transitions, 8045 flow [2024-06-14 12:59:28,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:59:28,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 12:59:28,319 INFO L175 Difference]: Start difference. First operand has 333 places, 463 transitions, 7025 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:59:28,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 480 transitions, 8045 flow [2024-06-14 12:59:30,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 480 transitions, 7855 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 12:59:30,326 INFO L231 Difference]: Finished difference. Result has 335 places, 463 transitions, 6905 flow [2024-06-14 12:59:30,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6835, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6905, PETRI_PLACES=335, PETRI_TRANSITIONS=463} [2024-06-14 12:59:30,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-14 12:59:30,327 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 463 transitions, 6905 flow [2024-06-14 12:59:30,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:30,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:30,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:30,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:59:30,327 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:30,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1160398583, now seen corresponding path program 1 times [2024-06-14 12:59:30,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:30,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260739059] [2024-06-14 12:59:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:31,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:31,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260739059] [2024-06-14 12:59:31,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260739059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:31,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:31,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:31,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822180568] [2024-06-14 12:59:31,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:31,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:31,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:31,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:31,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:31,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:31,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 463 transitions, 6905 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:31,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:31,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:31,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:32,898 INFO L124 PetriNetUnfolderBase]: 3900/5868 cut-off events. [2024-06-14 12:59:32,898 INFO L125 PetriNetUnfolderBase]: For 787866/787866 co-relation queries the response was YES. [2024-06-14 12:59:32,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56109 conditions, 5868 events. 3900/5868 cut-off events. For 787866/787866 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31628 event pairs, 786 based on Foata normal form. 2/5868 useless extension candidates. Maximal degree in co-relation 55951. Up to 5785 conditions per place. [2024-06-14 12:59:32,995 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 440 selfloop transitions, 39 changer transitions 0/482 dead transitions. [2024-06-14 12:59:32,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 482 transitions, 7977 flow [2024-06-14 12:59:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:59:32,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:59:32,996 INFO L175 Difference]: Start difference. First operand has 335 places, 463 transitions, 6905 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:59:32,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 482 transitions, 7977 flow [2024-06-14 12:59:34,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 482 transitions, 7900 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:59:34,916 INFO L231 Difference]: Finished difference. Result has 336 places, 465 transitions, 6969 flow [2024-06-14 12:59:34,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6969, PETRI_PLACES=336, PETRI_TRANSITIONS=465} [2024-06-14 12:59:34,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-14 12:59:34,917 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 465 transitions, 6969 flow [2024-06-14 12:59:34,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:34,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:34,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:34,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:59:34,917 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:34,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:34,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1160029187, now seen corresponding path program 3 times [2024-06-14 12:59:34,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:34,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603710535] [2024-06-14 12:59:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:34,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:35,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:35,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603710535] [2024-06-14 12:59:35,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603710535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:35,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:35,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:35,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113806925] [2024-06-14 12:59:35,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:35,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:35,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:35,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:35,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:35,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:35,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 465 transitions, 6969 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:35,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:35,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:35,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:37,436 INFO L124 PetriNetUnfolderBase]: 3908/5879 cut-off events. [2024-06-14 12:59:37,436 INFO L125 PetriNetUnfolderBase]: For 805401/805401 co-relation queries the response was YES. [2024-06-14 12:59:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56528 conditions, 5879 events. 3908/5879 cut-off events. For 805401/805401 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31691 event pairs, 754 based on Foata normal form. 2/5879 useless extension candidates. Maximal degree in co-relation 56369. Up to 5747 conditions per place. [2024-06-14 12:59:37,518 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 43 changer transitions 0/484 dead transitions. [2024-06-14 12:59:37,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 484 transitions, 8015 flow [2024-06-14 12:59:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:59:37,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:59:37,519 INFO L175 Difference]: Start difference. First operand has 336 places, 465 transitions, 6969 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:59:37,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 484 transitions, 8015 flow [2024-06-14 12:59:39,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 484 transitions, 7890 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:59:39,352 INFO L231 Difference]: Finished difference. Result has 338 places, 467 transitions, 6963 flow [2024-06-14 12:59:39,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6844, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6963, PETRI_PLACES=338, PETRI_TRANSITIONS=467} [2024-06-14 12:59:39,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-14 12:59:39,353 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 467 transitions, 6963 flow [2024-06-14 12:59:39,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:39,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:39,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:39,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:59:39,353 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:39,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:39,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2090490117, now seen corresponding path program 3 times [2024-06-14 12:59:39,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:39,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637818128] [2024-06-14 12:59:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:39,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:40,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:40,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637818128] [2024-06-14 12:59:40,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637818128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:40,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:40,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224371946] [2024-06-14 12:59:40,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:40,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:40,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:40,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:40,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 467 transitions, 6963 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:40,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:40,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:40,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:41,517 INFO L124 PetriNetUnfolderBase]: 3905/5878 cut-off events. [2024-06-14 12:59:41,517 INFO L125 PetriNetUnfolderBase]: For 817365/817390 co-relation queries the response was YES. [2024-06-14 12:59:41,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56578 conditions, 5878 events. 3905/5878 cut-off events. For 817365/817390 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31716 event pairs, 780 based on Foata normal form. 19/5893 useless extension candidates. Maximal degree in co-relation 56418. Up to 5684 conditions per place. [2024-06-14 12:59:41,598 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 76 changer transitions 0/485 dead transitions. [2024-06-14 12:59:41,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 485 transitions, 8159 flow [2024-06-14 12:59:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:59:41,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-14 12:59:41,599 INFO L175 Difference]: Start difference. First operand has 338 places, 467 transitions, 6963 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:59:41,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 485 transitions, 8159 flow [2024-06-14 12:59:43,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 485 transitions, 8038 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:59:43,598 INFO L231 Difference]: Finished difference. Result has 340 places, 467 transitions, 7000 flow [2024-06-14 12:59:43,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6842, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7000, PETRI_PLACES=340, PETRI_TRANSITIONS=467} [2024-06-14 12:59:43,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-14 12:59:43,599 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 467 transitions, 7000 flow [2024-06-14 12:59:43,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:43,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:43,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:43,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:59:43,599 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:43,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1862081931, now seen corresponding path program 7 times [2024-06-14 12:59:43,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:43,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918713571] [2024-06-14 12:59:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:43,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:44,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:44,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918713571] [2024-06-14 12:59:44,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918713571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:44,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:44,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:44,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987552024] [2024-06-14 12:59:44,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:44,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:44,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:44,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:44,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 467 transitions, 7000 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:44,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:44,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:44,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:45,880 INFO L124 PetriNetUnfolderBase]: 3983/5987 cut-off events. [2024-06-14 12:59:45,880 INFO L125 PetriNetUnfolderBase]: For 877314/877337 co-relation queries the response was YES. [2024-06-14 12:59:45,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58247 conditions, 5987 events. 3983/5987 cut-off events. For 877314/877337 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32346 event pairs, 732 based on Foata normal form. 14/5995 useless extension candidates. Maximal degree in co-relation 58086. Up to 4938 conditions per place. [2024-06-14 12:59:45,957 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 364 selfloop transitions, 159 changer transitions 0/526 dead transitions. [2024-06-14 12:59:45,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 526 transitions, 9231 flow [2024-06-14 12:59:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:59:45,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:59:45,958 INFO L175 Difference]: Start difference. First operand has 340 places, 467 transitions, 7000 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:59:45,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 526 transitions, 9231 flow [2024-06-14 12:59:47,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 526 transitions, 9057 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:59:47,927 INFO L231 Difference]: Finished difference. Result has 345 places, 496 transitions, 7861 flow [2024-06-14 12:59:47,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6826, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7861, PETRI_PLACES=345, PETRI_TRANSITIONS=496} [2024-06-14 12:59:47,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-14 12:59:47,928 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 496 transitions, 7861 flow [2024-06-14 12:59:47,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:47,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:47,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:47,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:59:47,928 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:47,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1862380461, now seen corresponding path program 8 times [2024-06-14 12:59:47,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:47,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783493261] [2024-06-14 12:59:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:48,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:48,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783493261] [2024-06-14 12:59:48,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783493261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:48,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:48,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:48,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178522503] [2024-06-14 12:59:48,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:48,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:48,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:48,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:48,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:48,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:48,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 496 transitions, 7861 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:48,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:48,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:48,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:50,154 INFO L124 PetriNetUnfolderBase]: 4025/6046 cut-off events. [2024-06-14 12:59:50,154 INFO L125 PetriNetUnfolderBase]: For 911162/911185 co-relation queries the response was YES. [2024-06-14 12:59:50,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61030 conditions, 6046 events. 4025/6046 cut-off events. For 911162/911185 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32722 event pairs, 730 based on Foata normal form. 14/6054 useless extension candidates. Maximal degree in co-relation 60865. Up to 4977 conditions per place. [2024-06-14 12:59:50,248 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 369 selfloop transitions, 159 changer transitions 0/531 dead transitions. [2024-06-14 12:59:50,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 531 transitions, 9785 flow [2024-06-14 12:59:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:59:50,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-14 12:59:50,249 INFO L175 Difference]: Start difference. First operand has 345 places, 496 transitions, 7861 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:59:50,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 531 transitions, 9785 flow [2024-06-14 12:59:52,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 531 transitions, 9526 flow, removed 113 selfloop flow, removed 2 redundant places. [2024-06-14 12:59:52,415 INFO L231 Difference]: Finished difference. Result has 352 places, 504 transitions, 8137 flow [2024-06-14 12:59:52,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7646, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8137, PETRI_PLACES=352, PETRI_TRANSITIONS=504} [2024-06-14 12:59:52,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 12:59:52,416 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 504 transitions, 8137 flow [2024-06-14 12:59:52,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:52,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:52,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:52,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:59:52,416 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:52,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:52,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1862380647, now seen corresponding path program 4 times [2024-06-14 12:59:52,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:52,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226584049] [2024-06-14 12:59:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:52,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:53,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:53,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226584049] [2024-06-14 12:59:53,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226584049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:53,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:53,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:53,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115532952] [2024-06-14 12:59:53,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:53,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:53,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:53,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:53,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:53,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 504 transitions, 8137 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:53,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:53,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:53,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:54,666 INFO L124 PetriNetUnfolderBase]: 4022/6041 cut-off events. [2024-06-14 12:59:54,666 INFO L125 PetriNetUnfolderBase]: For 906797/906822 co-relation queries the response was YES. [2024-06-14 12:59:54,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61143 conditions, 6041 events. 4022/6041 cut-off events. For 906797/906822 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32709 event pairs, 782 based on Foata normal form. 19/6056 useless extension candidates. Maximal degree in co-relation 60975. Up to 5848 conditions per place. [2024-06-14 12:59:54,764 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 447 selfloop transitions, 71 changer transitions 0/521 dead transitions. [2024-06-14 12:59:54,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 521 transitions, 9239 flow [2024-06-14 12:59:54,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:59:54,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:59:54,766 INFO L175 Difference]: Start difference. First operand has 352 places, 504 transitions, 8137 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:59:54,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 521 transitions, 9239 flow [2024-06-14 12:59:57,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 521 transitions, 8871 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-14 12:59:57,286 INFO L231 Difference]: Finished difference. Result has 355 places, 504 transitions, 7917 flow [2024-06-14 12:59:57,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7769, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7917, PETRI_PLACES=355, PETRI_TRANSITIONS=504} [2024-06-14 12:59:57,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-14 12:59:57,286 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 504 transitions, 7917 flow [2024-06-14 12:59:57,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:57,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:57,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:59:57,287 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:57,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1672740537, now seen corresponding path program 4 times [2024-06-14 12:59:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:57,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941691006] [2024-06-14 12:59:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:57,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:58,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941691006] [2024-06-14 12:59:58,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941691006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:58,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:58,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:58,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072566803] [2024-06-14 12:59:58,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:58,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:58,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:58,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:58,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:58,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:58,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 504 transitions, 7917 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:58,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:58,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:58,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:59,421 INFO L124 PetriNetUnfolderBase]: 4026/6047 cut-off events. [2024-06-14 12:59:59,421 INFO L125 PetriNetUnfolderBase]: For 930065/930090 co-relation queries the response was YES. [2024-06-14 12:59:59,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60644 conditions, 6047 events. 4026/6047 cut-off events. For 930065/930090 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32752 event pairs, 732 based on Foata normal form. 22/6065 useless extension candidates. Maximal degree in co-relation 60475. Up to 5514 conditions per place. [2024-06-14 12:59:59,515 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 385 selfloop transitions, 141 changer transitions 0/529 dead transitions. [2024-06-14 12:59:59,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 529 transitions, 9496 flow [2024-06-14 12:59:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:59:59,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:59:59,516 INFO L175 Difference]: Start difference. First operand has 355 places, 504 transitions, 7917 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:59:59,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 529 transitions, 9496 flow [2024-06-14 13:00:01,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 529 transitions, 9322 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:00:01,798 INFO L231 Difference]: Finished difference. Result has 357 places, 507 transitions, 8121 flow [2024-06-14 13:00:01,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8121, PETRI_PLACES=357, PETRI_TRANSITIONS=507} [2024-06-14 13:00:01,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 13:00:01,798 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 507 transitions, 8121 flow [2024-06-14 13:00:01,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:01,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:01,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:01,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:00:01,799 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:01,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:01,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2027003577, now seen corresponding path program 5 times [2024-06-14 13:00:01,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:01,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340317046] [2024-06-14 13:00:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:02,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:02,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340317046] [2024-06-14 13:00:02,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340317046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:02,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:02,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:02,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626598234] [2024-06-14 13:00:02,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:02,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:02,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:02,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:02,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:02,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:02,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 507 transitions, 8121 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:02,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:02,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:02,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:04,135 INFO L124 PetriNetUnfolderBase]: 4030/6051 cut-off events. [2024-06-14 13:00:04,135 INFO L125 PetriNetUnfolderBase]: For 944535/944535 co-relation queries the response was YES. [2024-06-14 13:00:04,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61134 conditions, 6051 events. 4030/6051 cut-off events. For 944535/944535 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 32776 event pairs, 736 based on Foata normal form. 4/6053 useless extension candidates. Maximal degree in co-relation 60964. Up to 5902 conditions per place. [2024-06-14 13:00:04,231 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 475 selfloop transitions, 54 changer transitions 0/532 dead transitions. [2024-06-14 13:00:04,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 532 transitions, 9697 flow [2024-06-14 13:00:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:00:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:00:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:00:04,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 13:00:04,233 INFO L175 Difference]: Start difference. First operand has 357 places, 507 transitions, 8121 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:00:04,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 532 transitions, 9697 flow [2024-06-14 13:00:06,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 532 transitions, 9195 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-14 13:00:06,645 INFO L231 Difference]: Finished difference. Result has 358 places, 510 transitions, 7806 flow [2024-06-14 13:00:06,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7625, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7806, PETRI_PLACES=358, PETRI_TRANSITIONS=510} [2024-06-14 13:00:06,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-14 13:00:06,646 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 510 transitions, 7806 flow [2024-06-14 13:00:06,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:06,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:06,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:06,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:00:06,646 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:06,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:06,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2027003205, now seen corresponding path program 9 times [2024-06-14 13:00:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:06,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121903963] [2024-06-14 13:00:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:07,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:07,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121903963] [2024-06-14 13:00:07,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121903963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:07,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:07,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:07,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523605757] [2024-06-14 13:00:07,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:07,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:07,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:07,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:07,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:07,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:07,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 510 transitions, 7806 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:07,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:07,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:07,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:09,165 INFO L124 PetriNetUnfolderBase]: 4156/6228 cut-off events. [2024-06-14 13:00:09,165 INFO L125 PetriNetUnfolderBase]: For 1023111/1023111 co-relation queries the response was YES. [2024-06-14 13:00:09,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62145 conditions, 6228 events. 4156/6228 cut-off events. For 1023111/1023111 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33720 event pairs, 712 based on Foata normal form. 18/6244 useless extension candidates. Maximal degree in co-relation 61976. Up to 5846 conditions per place. [2024-06-14 13:00:09,260 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 470 selfloop transitions, 82 changer transitions 0/555 dead transitions. [2024-06-14 13:00:09,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 555 transitions, 9753 flow [2024-06-14 13:00:09,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:00:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:00:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:00:09,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 13:00:09,261 INFO L175 Difference]: Start difference. First operand has 358 places, 510 transitions, 7806 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:00:09,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 555 transitions, 9753 flow [2024-06-14 13:00:12,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 555 transitions, 9515 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-14 13:00:12,408 INFO L231 Difference]: Finished difference. Result has 361 places, 530 transitions, 8207 flow [2024-06-14 13:00:12,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7568, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8207, PETRI_PLACES=361, PETRI_TRANSITIONS=530} [2024-06-14 13:00:12,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-14 13:00:12,408 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 530 transitions, 8207 flow [2024-06-14 13:00:12,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:12,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:12,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:12,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:00:12,409 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:12,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1387925539, now seen corresponding path program 10 times [2024-06-14 13:00:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:12,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115392609] [2024-06-14 13:00:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:13,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:13,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115392609] [2024-06-14 13:00:13,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115392609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:13,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:13,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213656187] [2024-06-14 13:00:13,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:13,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:13,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:13,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:13,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 530 transitions, 8207 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:13,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:13,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:13,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:14,788 INFO L124 PetriNetUnfolderBase]: 4330/6471 cut-off events. [2024-06-14 13:00:14,788 INFO L125 PetriNetUnfolderBase]: For 1087977/1087977 co-relation queries the response was YES. [2024-06-14 13:00:14,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65873 conditions, 6471 events. 4330/6471 cut-off events. For 1087977/1087977 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 35126 event pairs, 734 based on Foata normal form. 18/6487 useless extension candidates. Maximal degree in co-relation 65702. Up to 5427 conditions per place. [2024-06-14 13:00:14,879 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 428 selfloop transitions, 161 changer transitions 0/592 dead transitions. [2024-06-14 13:00:14,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 592 transitions, 10490 flow [2024-06-14 13:00:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:00:14,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-14 13:00:14,881 INFO L175 Difference]: Start difference. First operand has 361 places, 530 transitions, 8207 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:00:14,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 592 transitions, 10490 flow [2024-06-14 13:00:18,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 592 transitions, 10302 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:18,424 INFO L231 Difference]: Finished difference. Result has 367 places, 556 transitions, 9095 flow [2024-06-14 13:00:18,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8019, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9095, PETRI_PLACES=367, PETRI_TRANSITIONS=556} [2024-06-14 13:00:18,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-14 13:00:18,425 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 556 transitions, 9095 flow [2024-06-14 13:00:18,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:18,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:18,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:18,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:00:18,425 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:18,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:18,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1193454847, now seen corresponding path program 6 times [2024-06-14 13:00:18,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:18,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636887310] [2024-06-14 13:00:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:18,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:19,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:19,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636887310] [2024-06-14 13:00:19,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636887310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:19,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:19,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659619579] [2024-06-14 13:00:19,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:19,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:19,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:19,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:19,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:19,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 556 transitions, 9095 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:19,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:19,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:19,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:20,994 INFO L124 PetriNetUnfolderBase]: 4334/6478 cut-off events. [2024-06-14 13:00:20,995 INFO L125 PetriNetUnfolderBase]: For 1051985/1051985 co-relation queries the response was YES. [2024-06-14 13:00:21,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67620 conditions, 6478 events. 4334/6478 cut-off events. For 1051985/1051985 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35198 event pairs, 782 based on Foata normal form. 4/6480 useless extension candidates. Maximal degree in co-relation 67445. Up to 6172 conditions per place. [2024-06-14 13:00:21,084 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 499 selfloop transitions, 84 changer transitions 0/586 dead transitions. [2024-06-14 13:00:21,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 586 transitions, 10823 flow [2024-06-14 13:00:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:00:21,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 13:00:21,086 INFO L175 Difference]: Start difference. First operand has 367 places, 556 transitions, 9095 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:00:21,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 586 transitions, 10823 flow [2024-06-14 13:00:24,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 586 transitions, 10554 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:24,086 INFO L231 Difference]: Finished difference. Result has 371 places, 559 transitions, 9093 flow [2024-06-14 13:00:24,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8830, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9093, PETRI_PLACES=371, PETRI_TRANSITIONS=559} [2024-06-14 13:00:24,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:00:24,086 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 559 transitions, 9093 flow [2024-06-14 13:00:24,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:24,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:24,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:24,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:00:24,087 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:24,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash -385786863, now seen corresponding path program 7 times [2024-06-14 13:00:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:24,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652615568] [2024-06-14 13:00:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:24,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:24,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:24,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652615568] [2024-06-14 13:00:24,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652615568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:24,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:24,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218554283] [2024-06-14 13:00:24,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:24,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:24,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:24,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:24,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:24,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:24,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 559 transitions, 9093 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:24,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:24,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:24,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:26,665 INFO L124 PetriNetUnfolderBase]: 4318/6456 cut-off events. [2024-06-14 13:00:26,665 INFO L125 PetriNetUnfolderBase]: For 1037644/1037644 co-relation queries the response was YES. [2024-06-14 13:00:26,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66582 conditions, 6456 events. 4318/6456 cut-off events. For 1037644/1037644 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 35072 event pairs, 728 based on Foata normal form. 4/6458 useless extension candidates. Maximal degree in co-relation 66406. Up to 6333 conditions per place. [2024-06-14 13:00:26,758 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 532 selfloop transitions, 42 changer transitions 0/577 dead transitions. [2024-06-14 13:00:26,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 577 transitions, 10325 flow [2024-06-14 13:00:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:00:26,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:00:26,759 INFO L175 Difference]: Start difference. First operand has 371 places, 559 transitions, 9093 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:00:26,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 577 transitions, 10325 flow [2024-06-14 13:00:28,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 577 transitions, 10115 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:28,848 INFO L231 Difference]: Finished difference. Result has 376 places, 559 transitions, 8981 flow [2024-06-14 13:00:28,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8883, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8981, PETRI_PLACES=376, PETRI_TRANSITIONS=559} [2024-06-14 13:00:28,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-14 13:00:28,848 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 559 transitions, 8981 flow [2024-06-14 13:00:28,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:28,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:28,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:28,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:00:28,849 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:28,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash -390440955, now seen corresponding path program 11 times [2024-06-14 13:00:28,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:28,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908560501] [2024-06-14 13:00:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:28,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:29,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:29,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908560501] [2024-06-14 13:00:29,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908560501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:29,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:29,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:29,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762834946] [2024-06-14 13:00:29,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:29,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:29,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:29,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:29,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:29,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 559 transitions, 8981 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:29,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:29,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:29,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:31,299 INFO L124 PetriNetUnfolderBase]: 4336/6481 cut-off events. [2024-06-14 13:00:31,299 INFO L125 PetriNetUnfolderBase]: For 1057627/1057627 co-relation queries the response was YES. [2024-06-14 13:00:31,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66502 conditions, 6481 events. 4336/6481 cut-off events. For 1057627/1057627 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35250 event pairs, 785 based on Foata normal form. 6/6485 useless extension candidates. Maximal degree in co-relation 66324. Up to 6173 conditions per place. [2024-06-14 13:00:31,414 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 507 selfloop transitions, 81 changer transitions 0/591 dead transitions. [2024-06-14 13:00:31,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 591 transitions, 10572 flow [2024-06-14 13:00:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:00:31,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 13:00:31,415 INFO L175 Difference]: Start difference. First operand has 376 places, 559 transitions, 8981 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:00:31,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 591 transitions, 10572 flow [2024-06-14 13:00:34,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 591 transitions, 10474 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:00:34,230 INFO L231 Difference]: Finished difference. Result has 377 places, 563 transitions, 9214 flow [2024-06-14 13:00:34,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8883, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9214, PETRI_PLACES=377, PETRI_TRANSITIONS=563} [2024-06-14 13:00:34,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-14 13:00:34,231 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 563 transitions, 9214 flow [2024-06-14 13:00:34,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:34,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:34,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:34,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:00:34,231 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:34,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2066101045, now seen corresponding path program 8 times [2024-06-14 13:00:34,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:34,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27087905] [2024-06-14 13:00:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:34,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:34,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:34,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27087905] [2024-06-14 13:00:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27087905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:34,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:34,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:34,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126255507] [2024-06-14 13:00:34,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:34,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:34,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:34,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:34,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:34,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:34,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 563 transitions, 9214 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:34,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:34,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:34,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:36,651 INFO L124 PetriNetUnfolderBase]: 4346/6496 cut-off events. [2024-06-14 13:00:36,651 INFO L125 PetriNetUnfolderBase]: For 1065671/1065671 co-relation queries the response was YES. [2024-06-14 13:00:36,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67317 conditions, 6496 events. 4346/6496 cut-off events. For 1065671/1065671 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35264 event pairs, 840 based on Foata normal form. 2/6496 useless extension candidates. Maximal degree in co-relation 67137. Up to 6399 conditions per place. [2024-06-14 13:00:36,766 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 543 selfloop transitions, 41 changer transitions 0/587 dead transitions. [2024-06-14 13:00:36,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 587 transitions, 10724 flow [2024-06-14 13:00:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 13:00:36,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 13:00:36,767 INFO L175 Difference]: Start difference. First operand has 377 places, 563 transitions, 9214 flow. Second operand 7 states and 117 transitions. [2024-06-14 13:00:36,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 587 transitions, 10724 flow [2024-06-14 13:00:40,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 587 transitions, 10555 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 13:00:40,114 INFO L231 Difference]: Finished difference. Result has 379 places, 566 transitions, 9205 flow [2024-06-14 13:00:40,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9047, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9205, PETRI_PLACES=379, PETRI_TRANSITIONS=566} [2024-06-14 13:00:40,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-14 13:00:40,115 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 566 transitions, 9205 flow [2024-06-14 13:00:40,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:40,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:40,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:40,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:00:40,115 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:40,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2066338195, now seen corresponding path program 9 times [2024-06-14 13:00:40,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:40,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085197371] [2024-06-14 13:00:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:40,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:40,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:40,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085197371] [2024-06-14 13:00:40,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085197371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:40,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:40,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:40,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492680878] [2024-06-14 13:00:40,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:40,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:40,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:40,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:40,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 566 transitions, 9205 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:40,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:40,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:40,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:42,450 INFO L124 PetriNetUnfolderBase]: 4340/6488 cut-off events. [2024-06-14 13:00:42,451 INFO L125 PetriNetUnfolderBase]: For 1055469/1055469 co-relation queries the response was YES. [2024-06-14 13:00:42,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66703 conditions, 6488 events. 4340/6488 cut-off events. For 1055469/1055469 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35225 event pairs, 787 based on Foata normal form. 2/6488 useless extension candidates. Maximal degree in co-relation 66523. Up to 6427 conditions per place. [2024-06-14 13:00:42,570 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 27 changer transitions 0/582 dead transitions. [2024-06-14 13:00:42,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 582 transitions, 10427 flow [2024-06-14 13:00:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:00:42,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-14 13:00:42,571 INFO L175 Difference]: Start difference. First operand has 379 places, 566 transitions, 9205 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:00:42,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 582 transitions, 10427 flow [2024-06-14 13:00:45,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 582 transitions, 10155 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 13:00:45,846 INFO L231 Difference]: Finished difference. Result has 379 places, 566 transitions, 8993 flow [2024-06-14 13:00:45,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8933, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8993, PETRI_PLACES=379, PETRI_TRANSITIONS=566} [2024-06-14 13:00:45,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-14 13:00:45,847 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 566 transitions, 8993 flow [2024-06-14 13:00:45,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:45,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:45,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:45,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:00:45,847 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:45,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:45,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2066096023, now seen corresponding path program 12 times [2024-06-14 13:00:45,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:45,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287380146] [2024-06-14 13:00:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:45,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:46,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:46,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287380146] [2024-06-14 13:00:46,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287380146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:46,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:46,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:46,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121763014] [2024-06-14 13:00:46,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:46,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:46,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:46,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:46,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:46,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:46,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 566 transitions, 8993 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:46,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:46,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:46,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:48,233 INFO L124 PetriNetUnfolderBase]: 4351/6503 cut-off events. [2024-06-14 13:00:48,233 INFO L125 PetriNetUnfolderBase]: For 1079307/1079307 co-relation queries the response was YES. [2024-06-14 13:00:48,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66543 conditions, 6503 events. 4351/6503 cut-off events. For 1079307/1079307 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 35312 event pairs, 794 based on Foata normal form. 6/6507 useless extension candidates. Maximal degree in co-relation 66362. Up to 6309 conditions per place. [2024-06-14 13:00:48,336 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 535 selfloop transitions, 62 changer transitions 0/600 dead transitions. [2024-06-14 13:00:48,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 600 transitions, 10404 flow [2024-06-14 13:00:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:00:48,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 13:00:48,337 INFO L175 Difference]: Start difference. First operand has 379 places, 566 transitions, 8993 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:00:48,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 600 transitions, 10404 flow [2024-06-14 13:00:51,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 600 transitions, 10287 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:00:51,894 INFO L231 Difference]: Finished difference. Result has 381 places, 573 transitions, 9145 flow [2024-06-14 13:00:51,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8876, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9145, PETRI_PLACES=381, PETRI_TRANSITIONS=573} [2024-06-14 13:00:51,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-14 13:00:51,894 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 573 transitions, 9145 flow [2024-06-14 13:00:51,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:51,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:51,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:51,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:00:51,895 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:51,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1610537779, now seen corresponding path program 2 times [2024-06-14 13:00:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:51,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647609776] [2024-06-14 13:00:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:52,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:52,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647609776] [2024-06-14 13:00:52,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647609776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:52,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:52,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:00:52,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008486567] [2024-06-14 13:00:52,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:52,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:00:52,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:52,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:00:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:00:53,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:53,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 573 transitions, 9145 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:53,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:53,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:53,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:54,689 INFO L124 PetriNetUnfolderBase]: 4359/6516 cut-off events. [2024-06-14 13:00:54,689 INFO L125 PetriNetUnfolderBase]: For 1086355/1086355 co-relation queries the response was YES. [2024-06-14 13:00:54,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67815 conditions, 6516 events. 4359/6516 cut-off events. For 1086355/1086355 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 35436 event pairs, 784 based on Foata normal form. 2/6516 useless extension candidates. Maximal degree in co-relation 67632. Up to 6450 conditions per place. [2024-06-14 13:00:54,963 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 560 selfloop transitions, 27 changer transitions 0/590 dead transitions. [2024-06-14 13:00:54,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 590 transitions, 10441 flow [2024-06-14 13:00:54,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 13:00:54,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 13:00:54,964 INFO L175 Difference]: Start difference. First operand has 381 places, 573 transitions, 9145 flow. Second operand 6 states and 100 transitions. [2024-06-14 13:00:54,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 590 transitions, 10441 flow [2024-06-14 13:00:58,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 590 transitions, 10346 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:58,767 INFO L231 Difference]: Finished difference. Result has 383 places, 575 transitions, 9179 flow [2024-06-14 13:00:58,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9050, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9179, PETRI_PLACES=383, PETRI_TRANSITIONS=575} [2024-06-14 13:00:58,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-14 13:00:58,767 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 575 transitions, 9179 flow [2024-06-14 13:00:58,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:58,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:58,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:58,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:00:58,767 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:58,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1211040469, now seen corresponding path program 3 times [2024-06-14 13:00:58,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:58,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015524469] [2024-06-14 13:00:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:58,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:59,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:59,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015524469] [2024-06-14 13:00:59,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015524469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:59,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:59,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:00:59,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340020182] [2024-06-14 13:00:59,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:59,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:00:59,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:00:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:00:59,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:59,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 575 transitions, 9179 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:59,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:59,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:59,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:01,660 INFO L124 PetriNetUnfolderBase]: 4367/6528 cut-off events. [2024-06-14 13:01:01,660 INFO L125 PetriNetUnfolderBase]: For 1110539/1110539 co-relation queries the response was YES. [2024-06-14 13:01:01,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68081 conditions, 6528 events. 4367/6528 cut-off events. For 1110539/1110539 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35499 event pairs, 786 based on Foata normal form. 2/6528 useless extension candidates. Maximal degree in co-relation 67898. Up to 6476 conditions per place. [2024-06-14 13:01:01,760 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 558 selfloop transitions, 29 changer transitions 0/590 dead transitions. [2024-06-14 13:01:01,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 590 transitions, 10493 flow [2024-06-14 13:01:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-14 13:01:01,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-14 13:01:01,761 INFO L175 Difference]: Start difference. First operand has 383 places, 575 transitions, 9179 flow. Second operand 9 states and 123 transitions. [2024-06-14 13:01:01,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 590 transitions, 10493 flow [2024-06-14 13:01:05,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 590 transitions, 10378 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:05,109 INFO L231 Difference]: Finished difference. Result has 389 places, 579 transitions, 9244 flow [2024-06-14 13:01:05,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9066, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9244, PETRI_PLACES=389, PETRI_TRANSITIONS=579} [2024-06-14 13:01:05,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 13:01:05,109 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 579 transitions, 9244 flow [2024-06-14 13:01:05,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:05,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:05,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:05,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:01:05,110 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:05,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1648931829, now seen corresponding path program 4 times [2024-06-14 13:01:05,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:05,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630204689] [2024-06-14 13:01:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:05,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:06,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630204689] [2024-06-14 13:01:06,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630204689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:06,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:06,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:01:06,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829993949] [2024-06-14 13:01:06,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:06,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:01:06,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:06,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:01:06,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:01:06,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:06,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 579 transitions, 9244 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:06,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:06,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:06,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:08,085 INFO L124 PetriNetUnfolderBase]: 4362/6521 cut-off events. [2024-06-14 13:01:08,086 INFO L125 PetriNetUnfolderBase]: For 1123120/1123120 co-relation queries the response was YES. [2024-06-14 13:01:08,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68022 conditions, 6521 events. 4362/6521 cut-off events. For 1123120/1123120 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35459 event pairs, 823 based on Foata normal form. 2/6521 useless extension candidates. Maximal degree in co-relation 67837. Up to 6441 conditions per place. [2024-06-14 13:01:08,194 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 562 selfloop transitions, 32 changer transitions 0/597 dead transitions. [2024-06-14 13:01:08,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 597 transitions, 10558 flow [2024-06-14 13:01:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:01:08,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:01:08,195 INFO L175 Difference]: Start difference. First operand has 389 places, 579 transitions, 9244 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:01:08,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 597 transitions, 10558 flow [2024-06-14 13:01:11,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 597 transitions, 10383 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-14 13:01:11,913 INFO L231 Difference]: Finished difference. Result has 388 places, 581 transitions, 9216 flow [2024-06-14 13:01:11,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9069, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9216, PETRI_PLACES=388, PETRI_TRANSITIONS=581} [2024-06-14 13:01:11,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-14 13:01:11,914 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 581 transitions, 9216 flow [2024-06-14 13:01:11,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:11,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:11,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:11,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:01:11,914 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:11,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:11,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1210671073, now seen corresponding path program 4 times [2024-06-14 13:01:11,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:11,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791899904] [2024-06-14 13:01:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:11,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:12,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:12,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791899904] [2024-06-14 13:01:12,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791899904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:12,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:12,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:12,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510595717] [2024-06-14 13:01:12,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:12,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:12,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:12,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:12,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:12,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:12,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 581 transitions, 9216 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:12,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:12,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:12,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:14,824 INFO L124 PetriNetUnfolderBase]: 4401/6583 cut-off events. [2024-06-14 13:01:14,824 INFO L125 PetriNetUnfolderBase]: For 1194528/1194528 co-relation queries the response was YES. [2024-06-14 13:01:14,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68562 conditions, 6583 events. 4401/6583 cut-off events. For 1194528/1194528 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 35872 event pairs, 706 based on Foata normal form. 14/6595 useless extension candidates. Maximal degree in co-relation 68379. Up to 6349 conditions per place. [2024-06-14 13:01:14,932 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 558 selfloop transitions, 51 changer transitions 0/612 dead transitions. [2024-06-14 13:01:14,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 612 transitions, 10638 flow [2024-06-14 13:01:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:01:14,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-14 13:01:14,933 INFO L175 Difference]: Start difference. First operand has 388 places, 581 transitions, 9216 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:01:14,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 612 transitions, 10638 flow [2024-06-14 13:01:18,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 612 transitions, 10455 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:18,373 INFO L231 Difference]: Finished difference. Result has 390 places, 582 transitions, 9182 flow [2024-06-14 13:01:18,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9033, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9182, PETRI_PLACES=390, PETRI_TRANSITIONS=582} [2024-06-14 13:01:18,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 13:01:18,373 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 582 transitions, 9182 flow [2024-06-14 13:01:18,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:18,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:18,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:18,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:01:18,374 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:18,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:18,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1909101339, now seen corresponding path program 1 times [2024-06-14 13:01:18,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:18,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990336006] [2024-06-14 13:01:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:18,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:19,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:19,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990336006] [2024-06-14 13:01:19,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990336006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:19,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:19,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:19,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580281812] [2024-06-14 13:01:19,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:19,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:19,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:19,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:19,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 582 transitions, 9182 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:19,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:19,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:19,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:21,080 INFO L124 PetriNetUnfolderBase]: 4430/6626 cut-off events. [2024-06-14 13:01:21,081 INFO L125 PetriNetUnfolderBase]: For 1181376/1181380 co-relation queries the response was YES. [2024-06-14 13:01:21,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69211 conditions, 6626 events. 4430/6626 cut-off events. For 1181376/1181380 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36247 event pairs, 758 based on Foata normal form. 8/6631 useless extension candidates. Maximal degree in co-relation 69027. Up to 6305 conditions per place. [2024-06-14 13:01:21,193 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 510 selfloop transitions, 102 changer transitions 0/615 dead transitions. [2024-06-14 13:01:21,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 615 transitions, 11074 flow [2024-06-14 13:01:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:21,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:01:21,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 13:01:21,194 INFO L175 Difference]: Start difference. First operand has 390 places, 582 transitions, 9182 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:01:21,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 615 transitions, 11074 flow [2024-06-14 13:01:24,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 615 transitions, 10955 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:24,105 INFO L231 Difference]: Finished difference. Result has 394 places, 588 transitions, 9463 flow [2024-06-14 13:01:24,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9067, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9463, PETRI_PLACES=394, PETRI_TRANSITIONS=588} [2024-06-14 13:01:24,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-14 13:01:24,106 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 588 transitions, 9463 flow [2024-06-14 13:01:24,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:24,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:24,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:24,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:01:24,106 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:24,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:24,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1909161789, now seen corresponding path program 2 times [2024-06-14 13:01:24,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:24,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339456174] [2024-06-14 13:01:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:24,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:25,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:25,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339456174] [2024-06-14 13:01:25,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339456174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:25,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:25,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:25,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559089343] [2024-06-14 13:01:25,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:25,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:25,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:25,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:25,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:25,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 588 transitions, 9463 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:25,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:25,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:25,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:26,915 INFO L124 PetriNetUnfolderBase]: 4446/6651 cut-off events. [2024-06-14 13:01:26,915 INFO L125 PetriNetUnfolderBase]: For 1181309/1181325 co-relation queries the response was YES. [2024-06-14 13:01:26,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69662 conditions, 6651 events. 4446/6651 cut-off events. For 1181309/1181325 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36460 event pairs, 794 based on Foata normal form. 16/6663 useless extension candidates. Maximal degree in co-relation 69477. Up to 6398 conditions per place. [2024-06-14 13:01:27,030 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 513 selfloop transitions, 98 changer transitions 0/614 dead transitions. [2024-06-14 13:01:27,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 614 transitions, 11057 flow [2024-06-14 13:01:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:01:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:01:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-14 13:01:27,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-14 13:01:27,031 INFO L175 Difference]: Start difference. First operand has 394 places, 588 transitions, 9463 flow. Second operand 10 states and 154 transitions. [2024-06-14 13:01:27,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 614 transitions, 11057 flow [2024-06-14 13:01:30,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 614 transitions, 10752 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:30,754 INFO L231 Difference]: Finished difference. Result has 399 places, 591 transitions, 9462 flow [2024-06-14 13:01:30,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9206, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9462, PETRI_PLACES=399, PETRI_TRANSITIONS=591} [2024-06-14 13:01:30,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-14 13:01:30,754 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 591 transitions, 9462 flow [2024-06-14 13:01:30,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:30,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:30,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:30,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:01:30,755 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:30,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1909161913, now seen corresponding path program 1 times [2024-06-14 13:01:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:30,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399662579] [2024-06-14 13:01:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:31,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:31,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399662579] [2024-06-14 13:01:31,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399662579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:31,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:31,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:31,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832347983] [2024-06-14 13:01:31,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:31,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:31,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:31,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:31,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:31,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:31,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 591 transitions, 9462 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:31,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:31,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:31,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:33,595 INFO L124 PetriNetUnfolderBase]: 4492/6715 cut-off events. [2024-06-14 13:01:33,595 INFO L125 PetriNetUnfolderBase]: For 1212018/1212034 co-relation queries the response was YES. [2024-06-14 13:01:33,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70482 conditions, 6715 events. 4492/6715 cut-off events. For 1212018/1212034 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 36830 event pairs, 726 based on Foata normal form. 16/6727 useless extension candidates. Maximal degree in co-relation 70295. Up to 6023 conditions per place. [2024-06-14 13:01:33,712 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 440 selfloop transitions, 192 changer transitions 0/635 dead transitions. [2024-06-14 13:01:33,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 635 transitions, 11754 flow [2024-06-14 13:01:33,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:01:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:01:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-14 13:01:33,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924611973392461 [2024-06-14 13:01:33,714 INFO L175 Difference]: Start difference. First operand has 399 places, 591 transitions, 9462 flow. Second operand 11 states and 177 transitions. [2024-06-14 13:01:33,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 635 transitions, 11754 flow [2024-06-14 13:01:37,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 635 transitions, 11526 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:01:37,117 INFO L231 Difference]: Finished difference. Result has 403 places, 605 transitions, 9984 flow [2024-06-14 13:01:37,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9234, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9984, PETRI_PLACES=403, PETRI_TRANSITIONS=605} [2024-06-14 13:01:37,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-14 13:01:37,117 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 605 transitions, 9984 flow [2024-06-14 13:01:37,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:37,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:37,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:37,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:01:37,118 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:37,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2027249469, now seen corresponding path program 3 times [2024-06-14 13:01:37,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:37,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002600029] [2024-06-14 13:01:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:37,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:38,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:38,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002600029] [2024-06-14 13:01:38,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002600029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:38,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:38,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:38,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108058338] [2024-06-14 13:01:38,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:38,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:38,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:38,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:38,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:38,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 605 transitions, 9984 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:38,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:38,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:38,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:40,238 INFO L124 PetriNetUnfolderBase]: 4817/7248 cut-off events. [2024-06-14 13:01:40,238 INFO L125 PetriNetUnfolderBase]: For 1622816/1622816 co-relation queries the response was YES. [2024-06-14 13:01:40,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75471 conditions, 7248 events. 4817/7248 cut-off events. For 1622816/1622816 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 40238 event pairs, 782 based on Foata normal form. 78/7324 useless extension candidates. Maximal degree in co-relation 75282. Up to 6491 conditions per place. [2024-06-14 13:01:40,378 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 564 selfloop transitions, 76 changer transitions 0/643 dead transitions. [2024-06-14 13:01:40,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 643 transitions, 11838 flow [2024-06-14 13:01:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:01:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:01:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:01:40,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-14 13:01:40,379 INFO L175 Difference]: Start difference. First operand has 403 places, 605 transitions, 9984 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:01:40,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 643 transitions, 11838 flow [2024-06-14 13:01:44,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 643 transitions, 11486 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 13:01:44,536 INFO L231 Difference]: Finished difference. Result has 406 places, 611 transitions, 9966 flow [2024-06-14 13:01:44,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9632, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9966, PETRI_PLACES=406, PETRI_TRANSITIONS=611} [2024-06-14 13:01:44,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-14 13:01:44,537 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 611 transitions, 9966 flow [2024-06-14 13:01:44,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:44,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:44,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:44,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:01:44,538 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:44,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:44,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2078077407, now seen corresponding path program 2 times [2024-06-14 13:01:44,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:44,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489809128] [2024-06-14 13:01:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:44,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:45,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:45,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489809128] [2024-06-14 13:01:45,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489809128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:45,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:45,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:45,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280653735] [2024-06-14 13:01:45,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:45,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:45,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 611 transitions, 9966 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:45,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:45,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:45,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:47,566 INFO L124 PetriNetUnfolderBase]: 5025/7536 cut-off events. [2024-06-14 13:01:47,566 INFO L125 PetriNetUnfolderBase]: For 1405643/1405643 co-relation queries the response was YES. [2024-06-14 13:01:47,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80651 conditions, 7536 events. 5025/7536 cut-off events. For 1405643/1405643 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 41962 event pairs, 828 based on Foata normal form. 8/7542 useless extension candidates. Maximal degree in co-relation 80460. Up to 7027 conditions per place. [2024-06-14 13:01:47,699 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 560 selfloop transitions, 97 changer transitions 0/660 dead transitions. [2024-06-14 13:01:47,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 660 transitions, 12562 flow [2024-06-14 13:01:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:01:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:01:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:01:47,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 13:01:47,700 INFO L175 Difference]: Start difference. First operand has 406 places, 611 transitions, 9966 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:01:47,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 660 transitions, 12562 flow [2024-06-14 13:01:51,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 660 transitions, 12352 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-14 13:01:51,678 INFO L231 Difference]: Finished difference. Result has 409 places, 632 transitions, 10535 flow [2024-06-14 13:01:51,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9756, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10535, PETRI_PLACES=409, PETRI_TRANSITIONS=632} [2024-06-14 13:01:51,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-14 13:01:51,678 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 632 transitions, 10535 flow [2024-06-14 13:01:51,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:51,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:51,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:01:51,679 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:51,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2077892833, now seen corresponding path program 1 times [2024-06-14 13:01:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:51,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545525535] [2024-06-14 13:01:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:51,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:52,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545525535] [2024-06-14 13:01:52,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545525535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:52,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:52,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:52,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251444765] [2024-06-14 13:01:52,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:52,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:52,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:52,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:52,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:52,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 632 transitions, 10535 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:52,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:52,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:52,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:54,691 INFO L124 PetriNetUnfolderBase]: 5033/7548 cut-off events. [2024-06-14 13:01:54,691 INFO L125 PetriNetUnfolderBase]: For 1401046/1401046 co-relation queries the response was YES. [2024-06-14 13:01:54,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81546 conditions, 7548 events. 5033/7548 cut-off events. For 1401046/1401046 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42102 event pairs, 887 based on Foata normal form. 2/7548 useless extension candidates. Maximal degree in co-relation 81353. Up to 7483 conditions per place. [2024-06-14 13:01:54,835 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 618 selfloop transitions, 29 changer transitions 0/650 dead transitions. [2024-06-14 13:01:54,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 650 transitions, 11951 flow [2024-06-14 13:01:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 13:01:54,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-14 13:01:54,836 INFO L175 Difference]: Start difference. First operand has 409 places, 632 transitions, 10535 flow. Second operand 8 states and 119 transitions. [2024-06-14 13:01:54,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 650 transitions, 11951 flow [2024-06-14 13:01:58,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 650 transitions, 11674 flow, removed 120 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:58,370 INFO L231 Difference]: Finished difference. Result has 413 places, 634 transitions, 10381 flow [2024-06-14 13:01:58,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10258, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10381, PETRI_PLACES=413, PETRI_TRANSITIONS=634} [2024-06-14 13:01:58,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-14 13:01:58,371 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 634 transitions, 10381 flow [2024-06-14 13:01:58,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:58,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:58,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:58,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:01:58,371 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:58,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2027254243, now seen corresponding path program 3 times [2024-06-14 13:01:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:58,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010971546] [2024-06-14 13:01:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:59,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:59,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010971546] [2024-06-14 13:01:59,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010971546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:59,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:59,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:59,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641711894] [2024-06-14 13:01:59,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:59,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:59,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:59,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:59,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:59,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 634 transitions, 10381 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:59,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:59,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:59,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:01,396 INFO L124 PetriNetUnfolderBase]: 5097/7638 cut-off events. [2024-06-14 13:02:01,396 INFO L125 PetriNetUnfolderBase]: For 1465084/1465084 co-relation queries the response was YES. [2024-06-14 13:02:01,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82082 conditions, 7638 events. 5097/7638 cut-off events. For 1465084/1465084 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 42566 event pairs, 861 based on Foata normal form. 8/7644 useless extension candidates. Maximal degree in co-relation 81887. Up to 7220 conditions per place. [2024-06-14 13:02:01,539 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 587 selfloop transitions, 81 changer transitions 0/671 dead transitions. [2024-06-14 13:02:01,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 671 transitions, 12660 flow [2024-06-14 13:02:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:02:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:02:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:02:01,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:02:01,540 INFO L175 Difference]: Start difference. First operand has 413 places, 634 transitions, 10381 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:02:01,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 671 transitions, 12660 flow [2024-06-14 13:02:05,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 671 transitions, 12527 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:05,333 INFO L231 Difference]: Finished difference. Result has 418 places, 643 transitions, 10612 flow [2024-06-14 13:02:05,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10248, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10612, PETRI_PLACES=418, PETRI_TRANSITIONS=643} [2024-06-14 13:02:05,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-14 13:02:05,333 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 643 transitions, 10612 flow [2024-06-14 13:02:05,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:05,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:05,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:05,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:02:05,334 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:05,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:05,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1616257651, now seen corresponding path program 2 times [2024-06-14 13:02:05,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:05,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403590610] [2024-06-14 13:02:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:05,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:06,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403590610] [2024-06-14 13:02:06,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403590610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:06,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:06,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034016966] [2024-06-14 13:02:06,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:06,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:06,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:06,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:06,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 643 transitions, 10612 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:06,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:06,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:06,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:08,417 INFO L124 PetriNetUnfolderBase]: 5105/7650 cut-off events. [2024-06-14 13:02:08,418 INFO L125 PetriNetUnfolderBase]: For 1457693/1457693 co-relation queries the response was YES. [2024-06-14 13:02:08,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82656 conditions, 7650 events. 5105/7650 cut-off events. For 1457693/1457693 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42675 event pairs, 1066 based on Foata normal form. 2/7650 useless extension candidates. Maximal degree in co-relation 82461. Up to 7612 conditions per place. [2024-06-14 13:02:08,560 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 636 selfloop transitions, 18 changer transitions 0/657 dead transitions. [2024-06-14 13:02:08,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 657 transitions, 12022 flow [2024-06-14 13:02:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-14 13:02:08,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3224932249322493 [2024-06-14 13:02:08,561 INFO L175 Difference]: Start difference. First operand has 418 places, 643 transitions, 10612 flow. Second operand 9 states and 119 transitions. [2024-06-14 13:02:08,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 657 transitions, 12022 flow [2024-06-14 13:02:11,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 657 transitions, 11774 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:11,822 INFO L231 Difference]: Finished difference. Result has 420 places, 645 transitions, 10469 flow [2024-06-14 13:02:11,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10364, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10469, PETRI_PLACES=420, PETRI_TRANSITIONS=645} [2024-06-14 13:02:11,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-14 13:02:11,823 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 645 transitions, 10469 flow [2024-06-14 13:02:11,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:11,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:11,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:11,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:02:11,823 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:11,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash 688308159, now seen corresponding path program 1 times [2024-06-14 13:02:11,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:11,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765932784] [2024-06-14 13:02:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:11,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:12,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:12,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765932784] [2024-06-14 13:02:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765932784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:12,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:12,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:12,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001306678] [2024-06-14 13:02:12,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:12,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:12,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:12,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:12,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:12,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 645 transitions, 10469 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:12,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:12,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:12,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:15,163 INFO L124 PetriNetUnfolderBase]: 5099/7642 cut-off events. [2024-06-14 13:02:15,163 INFO L125 PetriNetUnfolderBase]: For 1470890/1470890 co-relation queries the response was YES. [2024-06-14 13:02:15,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82091 conditions, 7642 events. 5099/7642 cut-off events. For 1470890/1470890 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42681 event pairs, 1019 based on Foata normal form. 2/7642 useless extension candidates. Maximal degree in co-relation 81896. Up to 7532 conditions per place. [2024-06-14 13:02:15,289 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 616 selfloop transitions, 46 changer transitions 0/665 dead transitions. [2024-06-14 13:02:15,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 665 transitions, 12230 flow [2024-06-14 13:02:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:02:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:02:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-14 13:02:15,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33414634146341465 [2024-06-14 13:02:15,290 INFO L175 Difference]: Start difference. First operand has 420 places, 645 transitions, 10469 flow. Second operand 10 states and 137 transitions. [2024-06-14 13:02:15,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 665 transitions, 12230 flow [2024-06-14 13:02:18,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 665 transitions, 12072 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-14 13:02:18,343 INFO L231 Difference]: Finished difference. Result has 423 places, 651 transitions, 10628 flow [2024-06-14 13:02:18,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10311, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10628, PETRI_PLACES=423, PETRI_TRANSITIONS=651} [2024-06-14 13:02:18,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 13:02:18,344 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 651 transitions, 10628 flow [2024-06-14 13:02:18,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:18,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:18,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:18,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:02:18,344 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:18,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:18,344 INFO L85 PathProgramCache]: Analyzing trace with hash 688605077, now seen corresponding path program 3 times [2024-06-14 13:02:18,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:18,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224178570] [2024-06-14 13:02:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:18,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:19,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:19,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224178570] [2024-06-14 13:02:19,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224178570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:19,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:19,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:19,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947297836] [2024-06-14 13:02:19,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:19,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:19,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:19,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:19,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:19,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:19,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 651 transitions, 10628 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:19,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:19,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:19,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:21,481 INFO L124 PetriNetUnfolderBase]: 5107/7654 cut-off events. [2024-06-14 13:02:21,481 INFO L125 PetriNetUnfolderBase]: For 1498541/1498541 co-relation queries the response was YES. [2024-06-14 13:02:21,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82542 conditions, 7654 events. 5107/7654 cut-off events. For 1498541/1498541 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 42626 event pairs, 1027 based on Foata normal form. 2/7654 useless extension candidates. Maximal degree in co-relation 82350. Up to 7611 conditions per place. [2024-06-14 13:02:21,607 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 643 selfloop transitions, 19 changer transitions 0/665 dead transitions. [2024-06-14 13:02:21,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 665 transitions, 12050 flow [2024-06-14 13:02:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-14 13:02:21,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3224932249322493 [2024-06-14 13:02:21,608 INFO L175 Difference]: Start difference. First operand has 423 places, 651 transitions, 10628 flow. Second operand 9 states and 119 transitions. [2024-06-14 13:02:21,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 665 transitions, 12050 flow [2024-06-14 13:02:25,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 665 transitions, 11811 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:25,253 INFO L231 Difference]: Finished difference. Result has 425 places, 653 transitions, 10500 flow [2024-06-14 13:02:25,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10389, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10500, PETRI_PLACES=425, PETRI_TRANSITIONS=653} [2024-06-14 13:02:25,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-14 13:02:25,253 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 653 transitions, 10500 flow [2024-06-14 13:02:25,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:25,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:25,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:25,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:02:25,254 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:25,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:25,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2102078693, now seen corresponding path program 4 times [2024-06-14 13:02:25,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:25,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931416107] [2024-06-14 13:02:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:25,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:26,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:26,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931416107] [2024-06-14 13:02:26,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931416107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:26,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:26,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:26,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621308696] [2024-06-14 13:02:26,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:26,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:26,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:26,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:26,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 653 transitions, 10500 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:26,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:26,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:26,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:28,490 INFO L124 PetriNetUnfolderBase]: 5429/8187 cut-off events. [2024-06-14 13:02:28,490 INFO L125 PetriNetUnfolderBase]: For 1968846/1968846 co-relation queries the response was YES. [2024-06-14 13:02:28,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86522 conditions, 8187 events. 5429/8187 cut-off events. For 1968846/1968846 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 46279 event pairs, 948 based on Foata normal form. 78/8263 useless extension candidates. Maximal degree in co-relation 86330. Up to 6656 conditions per place. [2024-06-14 13:02:28,632 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 523 selfloop transitions, 178 changer transitions 0/704 dead transitions. [2024-06-14 13:02:28,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 704 transitions, 12768 flow [2024-06-14 13:02:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 13:02:28,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-14 13:02:28,633 INFO L175 Difference]: Start difference. First operand has 425 places, 653 transitions, 10500 flow. Second operand 9 states and 177 transitions. [2024-06-14 13:02:28,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 704 transitions, 12768 flow [2024-06-14 13:02:32,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 704 transitions, 12669 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:32,906 INFO L231 Difference]: Finished difference. Result has 427 places, 658 transitions, 10942 flow [2024-06-14 13:02:32,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10401, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10942, PETRI_PLACES=427, PETRI_TRANSITIONS=658} [2024-06-14 13:02:32,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-14 13:02:32,907 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 658 transitions, 10942 flow [2024-06-14 13:02:32,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:32,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:32,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:32,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:02:32,907 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:32,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash -351545539, now seen corresponding path program 4 times [2024-06-14 13:02:32,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:32,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190729392] [2024-06-14 13:02:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:32,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:33,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190729392] [2024-06-14 13:02:33,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190729392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:33,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:33,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:33,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257126794] [2024-06-14 13:02:33,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:33,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:33,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:33,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:33,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:34,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:34,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 658 transitions, 10942 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:34,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:34,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:34,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:36,040 INFO L124 PetriNetUnfolderBase]: 5424/8181 cut-off events. [2024-06-14 13:02:36,040 INFO L125 PetriNetUnfolderBase]: For 1552801/1552801 co-relation queries the response was YES. [2024-06-14 13:02:36,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87526 conditions, 8181 events. 5424/8181 cut-off events. For 1552801/1552801 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 46426 event pairs, 1044 based on Foata normal form. 2/8181 useless extension candidates. Maximal degree in co-relation 87333. Up to 8096 conditions per place. [2024-06-14 13:02:36,193 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 634 selfloop transitions, 36 changer transitions 0/673 dead transitions. [2024-06-14 13:02:36,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 673 transitions, 12404 flow [2024-06-14 13:02:36,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:02:36,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-14 13:02:36,194 INFO L175 Difference]: Start difference. First operand has 427 places, 658 transitions, 10942 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:02:36,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 673 transitions, 12404 flow [2024-06-14 13:02:39,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 673 transitions, 11989 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:39,781 INFO L231 Difference]: Finished difference. Result has 426 places, 660 transitions, 10685 flow [2024-06-14 13:02:39,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10527, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10685, PETRI_PLACES=426, PETRI_TRANSITIONS=660} [2024-06-14 13:02:39,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-14 13:02:39,782 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 660 transitions, 10685 flow [2024-06-14 13:02:39,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:39,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:39,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:39,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:02:39,782 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:39,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1193031201, now seen corresponding path program 4 times [2024-06-14 13:02:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:39,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198953315] [2024-06-14 13:02:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:39,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:40,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:40,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198953315] [2024-06-14 13:02:40,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198953315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:40,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:40,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:40,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503017310] [2024-06-14 13:02:40,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:40,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:40,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:40,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:40,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:40,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 660 transitions, 10685 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:40,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:40,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:40,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:42,993 INFO L124 PetriNetUnfolderBase]: 5444/8209 cut-off events. [2024-06-14 13:02:42,994 INFO L125 PetriNetUnfolderBase]: For 1581055/1581055 co-relation queries the response was YES. [2024-06-14 13:02:43,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86747 conditions, 8209 events. 5444/8209 cut-off events. For 1581055/1581055 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46565 event pairs, 1030 based on Foata normal form. 4/8211 useless extension candidates. Maximal degree in co-relation 86553. Up to 8054 conditions per place. [2024-06-14 13:02:43,141 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 629 selfloop transitions, 51 changer transitions 0/683 dead transitions. [2024-06-14 13:02:43,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 683 transitions, 12249 flow [2024-06-14 13:02:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-14 13:02:43,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-14 13:02:43,142 INFO L175 Difference]: Start difference. First operand has 426 places, 660 transitions, 10685 flow. Second operand 9 states and 136 transitions. [2024-06-14 13:02:43,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 683 transitions, 12249 flow [2024-06-14 13:02:47,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 683 transitions, 12117 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:47,045 INFO L231 Difference]: Finished difference. Result has 431 places, 664 transitions, 10783 flow [2024-06-14 13:02:47,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10553, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10783, PETRI_PLACES=431, PETRI_TRANSITIONS=664} [2024-06-14 13:02:47,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-14 13:02:47,045 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 664 transitions, 10783 flow [2024-06-14 13:02:47,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:47,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:47,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:47,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:02:47,046 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:47,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:47,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1193208831, now seen corresponding path program 5 times [2024-06-14 13:02:47,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:47,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744657570] [2024-06-14 13:02:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:47,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:47,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:47,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744657570] [2024-06-14 13:02:47,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744657570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:47,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:47,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:47,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930721744] [2024-06-14 13:02:47,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:47,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:47,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:47,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:47,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:48,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:48,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 664 transitions, 10783 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:48,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:48,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:48,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:50,429 INFO L124 PetriNetUnfolderBase]: 5464/8237 cut-off events. [2024-06-14 13:02:50,429 INFO L125 PetriNetUnfolderBase]: For 1550619/1550619 co-relation queries the response was YES. [2024-06-14 13:02:50,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86714 conditions, 8237 events. 5464/8237 cut-off events. For 1550619/1550619 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46623 event pairs, 1197 based on Foata normal form. 4/8239 useless extension candidates. Maximal degree in co-relation 86519. Up to 7848 conditions per place. [2024-06-14 13:02:50,565 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 585 selfloop transitions, 116 changer transitions 0/704 dead transitions. [2024-06-14 13:02:50,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 704 transitions, 13155 flow [2024-06-14 13:02:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:02:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:02:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 13:02:50,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-14 13:02:50,566 INFO L175 Difference]: Start difference. First operand has 431 places, 664 transitions, 10783 flow. Second operand 10 states and 171 transitions. [2024-06-14 13:02:50,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 704 transitions, 13155 flow [2024-06-14 13:02:54,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 704 transitions, 13013 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:54,186 INFO L231 Difference]: Finished difference. Result has 436 places, 670 transitions, 11057 flow [2024-06-14 13:02:54,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10641, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11057, PETRI_PLACES=436, PETRI_TRANSITIONS=670} [2024-06-14 13:02:54,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-14 13:02:54,186 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 670 transitions, 11057 flow [2024-06-14 13:02:54,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:54,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:54,187 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] [2024-06-14 13:02:54,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:02:54,187 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:54,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1765208740, now seen corresponding path program 1 times [2024-06-14 13:02:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:54,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530039192] [2024-06-14 13:02:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:54,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:55,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:55,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530039192] [2024-06-14 13:02:55,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530039192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:55,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:55,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:55,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222778701] [2024-06-14 13:02:55,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:55,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:55,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:55,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:55,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:55,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 670 transitions, 11057 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:55,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:55,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:55,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:57,364 INFO L124 PetriNetUnfolderBase]: 5461/8232 cut-off events. [2024-06-14 13:02:57,364 INFO L125 PetriNetUnfolderBase]: For 1552372/1552372 co-relation queries the response was YES. [2024-06-14 13:02:57,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86993 conditions, 8232 events. 5461/8232 cut-off events. For 1552372/1552372 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46629 event pairs, 1120 based on Foata normal form. 1/8231 useless extension candidates. Maximal degree in co-relation 86797. Up to 8007 conditions per place. [2024-06-14 13:02:57,505 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 621 selfloop transitions, 72 changer transitions 0/696 dead transitions. [2024-06-14 13:02:57,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 696 transitions, 12763 flow [2024-06-14 13:02:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:02:57,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 13:02:57,506 INFO L175 Difference]: Start difference. First operand has 436 places, 670 transitions, 11057 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:02:57,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 696 transitions, 12763 flow [2024-06-14 13:03:00,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 696 transitions, 12498 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:00,944 INFO L231 Difference]: Finished difference. Result has 438 places, 670 transitions, 10948 flow [2024-06-14 13:03:00,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10792, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10948, PETRI_PLACES=438, PETRI_TRANSITIONS=670} [2024-06-14 13:03:00,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-14 13:03:00,944 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 670 transitions, 10948 flow [2024-06-14 13:03:00,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:00,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:00,944 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] [2024-06-14 13:03:00,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:03:00,945 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:00,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1510144150, now seen corresponding path program 2 times [2024-06-14 13:03:00,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:00,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520631921] [2024-06-14 13:03:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:00,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:01,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520631921] [2024-06-14 13:03:01,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520631921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:01,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:01,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:01,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871635037] [2024-06-14 13:03:01,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:01,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:01,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:01,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:01,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:01,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:03:01,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 670 transitions, 10948 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:01,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:01,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:03:01,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:03,995 INFO L124 PetriNetUnfolderBase]: 5466/8241 cut-off events. [2024-06-14 13:03:03,995 INFO L125 PetriNetUnfolderBase]: For 1577702/1577702 co-relation queries the response was YES. [2024-06-14 13:03:04,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87130 conditions, 8241 events. 5466/8241 cut-off events. For 1577702/1577702 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46720 event pairs, 1217 based on Foata normal form. 1/8240 useless extension candidates. Maximal degree in co-relation 86932. Up to 8104 conditions per place. [2024-06-14 13:03:04,158 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 642 selfloop transitions, 49 changer transitions 0/694 dead transitions. [2024-06-14 13:03:04,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 694 transitions, 12464 flow [2024-06-14 13:03:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:03:04,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:03:04,159 INFO L175 Difference]: Start difference. First operand has 438 places, 670 transitions, 10948 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:03:04,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 694 transitions, 12464 flow [2024-06-14 13:03:08,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 694 transitions, 12255 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 13:03:08,652 INFO L231 Difference]: Finished difference. Result has 438 places, 673 transitions, 10909 flow [2024-06-14 13:03:08,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10751, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10909, PETRI_PLACES=438, PETRI_TRANSITIONS=673} [2024-06-14 13:03:08,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-14 13:03:08,653 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 673 transitions, 10909 flow [2024-06-14 13:03:08,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:08,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:08,653 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] [2024-06-14 13:03:08,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:03:08,654 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:08,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:08,654 INFO L85 PathProgramCache]: Analyzing trace with hash -828473555, now seen corresponding path program 1 times [2024-06-14 13:03:08,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:08,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968156705] [2024-06-14 13:03:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:08,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:09,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:09,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968156705] [2024-06-14 13:03:09,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968156705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:09,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:09,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:09,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044188976] [2024-06-14 13:03:09,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:09,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:09,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:09,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:09,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:09,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:03:09,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 673 transitions, 10909 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:09,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:09,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:03:09,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:11,593 INFO L124 PetriNetUnfolderBase]: 5508/8299 cut-off events. [2024-06-14 13:03:11,593 INFO L125 PetriNetUnfolderBase]: For 1607590/1607596 co-relation queries the response was YES. [2024-06-14 13:03:11,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88001 conditions, 8299 events. 5508/8299 cut-off events. For 1607590/1607596 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 47057 event pairs, 1219 based on Foata normal form. 8/8303 useless extension candidates. Maximal degree in co-relation 87803. Up to 8034 conditions per place. [2024-06-14 13:03:11,750 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 635 selfloop transitions, 69 changer transitions 0/707 dead transitions. [2024-06-14 13:03:11,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 707 transitions, 12848 flow [2024-06-14 13:03:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:03:11,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 13:03:11,751 INFO L175 Difference]: Start difference. First operand has 438 places, 673 transitions, 10909 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:03:11,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 707 transitions, 12848 flow [2024-06-14 13:03:16,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 707 transitions, 12736 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:16,863 INFO L231 Difference]: Finished difference. Result has 440 places, 682 transitions, 11177 flow [2024-06-14 13:03:16,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10799, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11177, PETRI_PLACES=440, PETRI_TRANSITIONS=682} [2024-06-14 13:03:16,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-14 13:03:16,864 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 682 transitions, 11177 flow [2024-06-14 13:03:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:16,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:16,864 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] [2024-06-14 13:03:16,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:03:16,864 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:16,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash 446327163, now seen corresponding path program 2 times [2024-06-14 13:03:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:16,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005033816] [2024-06-14 13:03:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:17,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:17,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005033816] [2024-06-14 13:03:17,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005033816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:17,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:17,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:17,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677203256] [2024-06-14 13:03:17,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:17,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:17,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:17,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:03:17,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 682 transitions, 11177 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:17,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:17,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:03:17,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:20,383 INFO L124 PetriNetUnfolderBase]: 5518/8311 cut-off events. [2024-06-14 13:03:20,384 INFO L125 PetriNetUnfolderBase]: For 1608955/1608955 co-relation queries the response was YES. [2024-06-14 13:03:20,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88446 conditions, 8311 events. 5518/8311 cut-off events. For 1608955/1608955 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 47134 event pairs, 1202 based on Foata normal form. 2/8311 useless extension candidates. Maximal degree in co-relation 88247. Up to 8111 conditions per place. [2024-06-14 13:03:20,511 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 644 selfloop transitions, 65 changer transitions 0/712 dead transitions. [2024-06-14 13:03:20,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 712 transitions, 12788 flow [2024-06-14 13:03:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:03:20,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:03:20,512 INFO L175 Difference]: Start difference. First operand has 440 places, 682 transitions, 11177 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:03:20,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 712 transitions, 12788 flow [2024-06-14 13:03:24,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 712 transitions, 12594 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-14 13:03:24,403 INFO L231 Difference]: Finished difference. Result has 445 places, 685 transitions, 11208 flow [2024-06-14 13:03:24,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11009, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11208, PETRI_PLACES=445, PETRI_TRANSITIONS=685} [2024-06-14 13:03:24,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-14 13:03:24,404 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 685 transitions, 11208 flow [2024-06-14 13:03:24,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:24,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:24,404 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] [2024-06-14 13:03:24,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:03:24,404 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:24,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1678247819, now seen corresponding path program 1 times [2024-06-14 13:03:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:24,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143975791] [2024-06-14 13:03:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:24,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:25,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143975791] [2024-06-14 13:03:25,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143975791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:25,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:25,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:25,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669886927] [2024-06-14 13:03:25,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:25,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:25,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:25,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:25,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:03:25,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 685 transitions, 11208 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:25,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:25,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:03:25,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:27,532 INFO L124 PetriNetUnfolderBase]: 5580/8397 cut-off events. [2024-06-14 13:03:27,532 INFO L125 PetriNetUnfolderBase]: For 1674739/1674739 co-relation queries the response was YES. [2024-06-14 13:03:27,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89882 conditions, 8397 events. 5580/8397 cut-off events. For 1674739/1674739 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47583 event pairs, 1136 based on Foata normal form. 4/8399 useless extension candidates. Maximal degree in co-relation 89681. Up to 7996 conditions per place. [2024-06-14 13:03:27,675 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 619 selfloop transitions, 110 changer transitions 0/732 dead transitions. [2024-06-14 13:03:27,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 732 transitions, 13259 flow [2024-06-14 13:03:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:03:27,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:03:27,676 INFO L175 Difference]: Start difference. First operand has 445 places, 685 transitions, 11208 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:03:27,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 732 transitions, 13259 flow [2024-06-14 13:03:32,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 732 transitions, 13097 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:32,544 INFO L231 Difference]: Finished difference. Result has 448 places, 700 transitions, 11536 flow [2024-06-14 13:03:32,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11046, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11536, PETRI_PLACES=448, PETRI_TRANSITIONS=700} [2024-06-14 13:03:32,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-14 13:03:32,544 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 700 transitions, 11536 flow [2024-06-14 13:03:32,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:32,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:32,545 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] [2024-06-14 13:03:32,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:03:32,545 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:32,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash -651222065, now seen corresponding path program 3 times [2024-06-14 13:03:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:32,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822361013] [2024-06-14 13:03:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:32,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822361013] [2024-06-14 13:03:33,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822361013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:33,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:33,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:33,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427042159] [2024-06-14 13:03:33,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:33,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:33,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:33,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:33,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:03:33,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 700 transitions, 11536 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:33,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:33,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:03:33,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:35,683 INFO L124 PetriNetUnfolderBase]: 5590/8412 cut-off events. [2024-06-14 13:03:35,683 INFO L125 PetriNetUnfolderBase]: For 1700396/1700396 co-relation queries the response was YES. [2024-06-14 13:03:35,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91934 conditions, 8412 events. 5590/8412 cut-off events. For 1700396/1700396 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 47677 event pairs, 1209 based on Foata normal form. 2/8412 useless extension candidates. Maximal degree in co-relation 91731. Up to 8271 conditions per place. [2024-06-14 13:03:35,843 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 671 selfloop transitions, 52 changer transitions 0/726 dead transitions. [2024-06-14 13:03:35,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 726 transitions, 13137 flow [2024-06-14 13:03:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:03:35,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-14 13:03:35,844 INFO L175 Difference]: Start difference. First operand has 448 places, 700 transitions, 11536 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:03:35,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 726 transitions, 13137 flow [2024-06-14 13:03:41,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 726 transitions, 12991 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-14 13:03:41,592 INFO L231 Difference]: Finished difference. Result has 454 places, 703 transitions, 11577 flow [2024-06-14 13:03:41,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11398, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11577, PETRI_PLACES=454, PETRI_TRANSITIONS=703} [2024-06-14 13:03:41,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-14 13:03:41,592 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 703 transitions, 11577 flow [2024-06-14 13:03:41,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:41,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:41,592 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] [2024-06-14 13:03:41,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:03:41,593 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:41,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:41,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1500879149, now seen corresponding path program 2 times [2024-06-14 13:03:41,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:41,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803865459] [2024-06-14 13:03:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:41,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:42,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:42,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803865459] [2024-06-14 13:03:42,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803865459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:42,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:42,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:42,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477036567] [2024-06-14 13:03:42,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:42,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:42,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:42,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:03:42,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 703 transitions, 11577 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:42,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:42,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:03:42,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:44,644 INFO L124 PetriNetUnfolderBase]: 5610/8440 cut-off events. [2024-06-14 13:03:44,644 INFO L125 PetriNetUnfolderBase]: For 1735969/1735969 co-relation queries the response was YES. [2024-06-14 13:03:44,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90756 conditions, 8440 events. 5610/8440 cut-off events. For 1735969/1735969 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 47925 event pairs, 1241 based on Foata normal form. 4/8442 useless extension candidates. Maximal degree in co-relation 90551. Up to 8168 conditions per place. [2024-06-14 13:03:44,798 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 636 selfloop transitions, 94 changer transitions 0/733 dead transitions. [2024-06-14 13:03:44,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 733 transitions, 13219 flow [2024-06-14 13:03:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:03:44,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 13:03:44,799 INFO L175 Difference]: Start difference. First operand has 454 places, 703 transitions, 11577 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:03:44,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 733 transitions, 13219 flow [2024-06-14 13:03:50,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 733 transitions, 13093 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:50,705 INFO L231 Difference]: Finished difference. Result has 457 places, 708 transitions, 11729 flow [2024-06-14 13:03:50,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11451, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11729, PETRI_PLACES=457, PETRI_TRANSITIONS=708} [2024-06-14 13:03:50,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-14 13:03:50,706 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 708 transitions, 11729 flow [2024-06-14 13:03:50,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:50,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:50,706 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] [2024-06-14 13:03:50,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:03:50,707 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:50,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:50,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1501116299, now seen corresponding path program 3 times [2024-06-14 13:03:50,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:50,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960700692] [2024-06-14 13:03:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:50,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:51,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960700692] [2024-06-14 13:03:51,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960700692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:51,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:51,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:51,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594376221] [2024-06-14 13:03:51,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:51,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:51,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:51,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:51,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:03:51,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 708 transitions, 11729 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:51,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:51,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:03:51,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:54,074 INFO L124 PetriNetUnfolderBase]: 5630/8468 cut-off events. [2024-06-14 13:03:54,074 INFO L125 PetriNetUnfolderBase]: For 1766077/1766077 co-relation queries the response was YES. [2024-06-14 13:03:54,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91406 conditions, 8468 events. 5630/8468 cut-off events. For 1766077/1766077 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 48017 event pairs, 1165 based on Foata normal form. 4/8470 useless extension candidates. Maximal degree in co-relation 91200. Up to 8174 conditions per place. [2024-06-14 13:03:54,249 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 636 selfloop transitions, 99 changer transitions 0/738 dead transitions. [2024-06-14 13:03:54,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 738 transitions, 13385 flow [2024-06-14 13:03:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:03:54,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 13:03:54,250 INFO L175 Difference]: Start difference. First operand has 457 places, 708 transitions, 11729 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:03:54,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 738 transitions, 13385 flow [2024-06-14 13:03:59,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 738 transitions, 13146 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:59,093 INFO L231 Difference]: Finished difference. Result has 460 places, 711 transitions, 11766 flow [2024-06-14 13:03:59,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11490, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11766, PETRI_PLACES=460, PETRI_TRANSITIONS=711} [2024-06-14 13:03:59,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-14 13:03:59,094 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 711 transitions, 11766 flow [2024-06-14 13:03:59,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:59,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:59,094 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] [2024-06-14 13:03:59,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:03:59,094 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:59,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:59,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1815264785, now seen corresponding path program 1 times [2024-06-14 13:03:59,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:59,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193619532] [2024-06-14 13:03:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:00,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:00,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193619532] [2024-06-14 13:04:00,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193619532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:00,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:00,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:00,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191649333] [2024-06-14 13:04:00,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:00,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:00,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:00,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:00,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:00,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 711 transitions, 11766 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:00,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:00,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:00,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:03,034 INFO L124 PetriNetUnfolderBase]: 5704/8583 cut-off events. [2024-06-14 13:04:03,034 INFO L125 PetriNetUnfolderBase]: For 1877933/1877933 co-relation queries the response was YES. [2024-06-14 13:04:03,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93499 conditions, 8583 events. 5704/8583 cut-off events. For 1877933/1877933 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 48814 event pairs, 1082 based on Foata normal form. 8/8589 useless extension candidates. Maximal degree in co-relation 93292. Up to 8048 conditions per place. [2024-06-14 13:04:03,199 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 661 selfloop transitions, 87 changer transitions 0/751 dead transitions. [2024-06-14 13:04:03,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 751 transitions, 13786 flow [2024-06-14 13:04:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:04:03,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:04:03,200 INFO L175 Difference]: Start difference. First operand has 460 places, 711 transitions, 11766 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:04:03,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 751 transitions, 13786 flow [2024-06-14 13:04:08,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 751 transitions, 13538 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:08,465 INFO L231 Difference]: Finished difference. Result has 462 places, 713 transitions, 11762 flow [2024-06-14 13:04:08,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11518, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11762, PETRI_PLACES=462, PETRI_TRANSITIONS=713} [2024-06-14 13:04:08,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-14 13:04:08,466 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 713 transitions, 11762 flow [2024-06-14 13:04:08,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:08,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:08,466 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] [2024-06-14 13:04:08,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:04:08,466 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:08,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:08,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1039306675, now seen corresponding path program 2 times [2024-06-14 13:04:08,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:08,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875207140] [2024-06-14 13:04:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:08,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:09,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:09,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875207140] [2024-06-14 13:04:09,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875207140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:09,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:09,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:09,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316421520] [2024-06-14 13:04:09,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:09,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:09,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:09,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 713 transitions, 11762 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:09,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:09,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:09,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:12,171 INFO L124 PetriNetUnfolderBase]: 5804/8735 cut-off events. [2024-06-14 13:04:12,171 INFO L125 PetriNetUnfolderBase]: For 1996180/1996180 co-relation queries the response was YES. [2024-06-14 13:04:12,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96469 conditions, 8735 events. 5804/8735 cut-off events. For 1996180/1996180 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49966 event pairs, 1272 based on Foata normal form. 8/8741 useless extension candidates. Maximal degree in co-relation 96261. Up to 8358 conditions per place. [2024-06-14 13:04:12,341 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 663 selfloop transitions, 85 changer transitions 0/751 dead transitions. [2024-06-14 13:04:12,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 751 transitions, 13788 flow [2024-06-14 13:04:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:04:12,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-14 13:04:12,342 INFO L175 Difference]: Start difference. First operand has 462 places, 713 transitions, 11762 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:04:12,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 751 transitions, 13788 flow [2024-06-14 13:04:18,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 751 transitions, 13666 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:18,233 INFO L231 Difference]: Finished difference. Result has 466 places, 715 transitions, 11884 flow [2024-06-14 13:04:18,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11644, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11884, PETRI_PLACES=466, PETRI_TRANSITIONS=715} [2024-06-14 13:04:18,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-14 13:04:18,233 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 715 transitions, 11884 flow [2024-06-14 13:04:18,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:18,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:18,234 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] [2024-06-14 13:04:18,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:04:18,234 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:18,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:18,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1039315975, now seen corresponding path program 3 times [2024-06-14 13:04:18,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:18,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234499804] [2024-06-14 13:04:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:18,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:19,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:19,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234499804] [2024-06-14 13:04:19,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234499804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:19,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:19,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:19,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685165600] [2024-06-14 13:04:19,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:19,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:19,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:19,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:19,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:19,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:19,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 715 transitions, 11884 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:19,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:19,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:19,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:21,943 INFO L124 PetriNetUnfolderBase]: 5776/8695 cut-off events. [2024-06-14 13:04:21,943 INFO L125 PetriNetUnfolderBase]: For 1971667/1971667 co-relation queries the response was YES. [2024-06-14 13:04:22,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95071 conditions, 8695 events. 5776/8695 cut-off events. For 1971667/1971667 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49676 event pairs, 1210 based on Foata normal form. 12/8705 useless extension candidates. Maximal degree in co-relation 94861. Up to 8384 conditions per place. [2024-06-14 13:04:22,113 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 659 selfloop transitions, 84 changer transitions 0/746 dead transitions. [2024-06-14 13:04:22,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 746 transitions, 13554 flow [2024-06-14 13:04:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:04:22,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 13:04:22,114 INFO L175 Difference]: Start difference. First operand has 466 places, 715 transitions, 11884 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:04:22,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 746 transitions, 13554 flow [2024-06-14 13:04:27,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 746 transitions, 13423 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:27,463 INFO L231 Difference]: Finished difference. Result has 470 places, 715 transitions, 11926 flow [2024-06-14 13:04:27,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11753, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11926, PETRI_PLACES=470, PETRI_TRANSITIONS=715} [2024-06-14 13:04:27,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-14 13:04:27,463 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 715 transitions, 11926 flow [2024-06-14 13:04:27,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:27,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:27,464 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] [2024-06-14 13:04:27,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:04:27,464 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:27,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1895658295, now seen corresponding path program 4 times [2024-06-14 13:04:27,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:27,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122653718] [2024-06-14 13:04:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:27,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:28,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:28,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122653718] [2024-06-14 13:04:28,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122653718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:28,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:28,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:28,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189142092] [2024-06-14 13:04:28,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:28,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:28,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:28,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:28,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 715 transitions, 11926 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:28,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:28,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:28,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:30,827 INFO L124 PetriNetUnfolderBase]: 5866/8820 cut-off events. [2024-06-14 13:04:30,827 INFO L125 PetriNetUnfolderBase]: For 2004892/2004894 co-relation queries the response was YES. [2024-06-14 13:04:30,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97729 conditions, 8820 events. 5866/8820 cut-off events. For 2004892/2004894 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 50455 event pairs, 1119 based on Foata normal form. 4/8819 useless extension candidates. Maximal degree in co-relation 97517. Up to 7622 conditions per place. [2024-06-14 13:04:30,978 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 533 selfloop transitions, 227 changer transitions 0/763 dead transitions. [2024-06-14 13:04:30,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 763 transitions, 14790 flow [2024-06-14 13:04:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:04:30,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 13:04:30,979 INFO L175 Difference]: Start difference. First operand has 470 places, 715 transitions, 11926 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:04:30,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 763 transitions, 14790 flow [2024-06-14 13:04:36,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 763 transitions, 14617 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:04:36,359 INFO L231 Difference]: Finished difference. Result has 472 places, 736 transitions, 12845 flow [2024-06-14 13:04:36,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11753, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12845, PETRI_PLACES=472, PETRI_TRANSITIONS=736} [2024-06-14 13:04:36,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-14 13:04:36,360 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 736 transitions, 12845 flow [2024-06-14 13:04:36,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:36,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:36,360 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] [2024-06-14 13:04:36,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:04:36,360 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:36,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -274613677, now seen corresponding path program 4 times [2024-06-14 13:04:36,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:36,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087905739] [2024-06-14 13:04:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:36,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:37,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:37,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087905739] [2024-06-14 13:04:37,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087905739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:37,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:37,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:37,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812887944] [2024-06-14 13:04:37,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:37,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:37,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:37,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:37,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:37,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:37,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 736 transitions, 12845 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:37,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:37,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:37,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:39,766 INFO L124 PetriNetUnfolderBase]: 5942/8922 cut-off events. [2024-06-14 13:04:39,766 INFO L125 PetriNetUnfolderBase]: For 2107748/2107748 co-relation queries the response was YES. [2024-06-14 13:04:39,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101251 conditions, 8922 events. 5942/8922 cut-off events. For 2107748/2107748 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 51001 event pairs, 1202 based on Foata normal form. 4/8924 useless extension candidates. Maximal degree in co-relation 101036. Up to 8178 conditions per place. [2024-06-14 13:04:39,943 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 611 selfloop transitions, 165 changer transitions 0/779 dead transitions. [2024-06-14 13:04:39,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 779 transitions, 15351 flow [2024-06-14 13:04:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:04:39,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:04:39,944 INFO L175 Difference]: Start difference. First operand has 472 places, 736 transitions, 12845 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:04:39,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 779 transitions, 15351 flow [2024-06-14 13:04:45,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 779 transitions, 15154 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-14 13:04:45,769 INFO L231 Difference]: Finished difference. Result has 480 places, 746 transitions, 13425 flow [2024-06-14 13:04:45,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12648, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13425, PETRI_PLACES=480, PETRI_TRANSITIONS=746} [2024-06-14 13:04:45,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-14 13:04:45,770 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 746 transitions, 13425 flow [2024-06-14 13:04:45,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:45,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:45,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:45,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:04:45,771 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:45,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:45,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1895778265, now seen corresponding path program 5 times [2024-06-14 13:04:45,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:45,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145787990] [2024-06-14 13:04:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:45,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:46,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:46,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145787990] [2024-06-14 13:04:46,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145787990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:46,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:46,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:46,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854231115] [2024-06-14 13:04:46,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:46,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:46,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:46,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:46,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:46,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:46,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 746 transitions, 13425 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:46,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:46,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:46,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:49,655 INFO L124 PetriNetUnfolderBase]: 5952/8936 cut-off events. [2024-06-14 13:04:49,656 INFO L125 PetriNetUnfolderBase]: For 2133248/2133248 co-relation queries the response was YES. [2024-06-14 13:04:49,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102738 conditions, 8936 events. 5952/8936 cut-off events. For 2133248/2133248 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 51108 event pairs, 1231 based on Foata normal form. 2/8936 useless extension candidates. Maximal degree in co-relation 102520. Up to 8624 conditions per place. [2024-06-14 13:04:49,820 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 675 selfloop transitions, 98 changer transitions 0/776 dead transitions. [2024-06-14 13:04:49,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 776 transitions, 15386 flow [2024-06-14 13:04:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:04:49,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 13:04:49,821 INFO L175 Difference]: Start difference. First operand has 480 places, 746 transitions, 13425 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:04:49,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 776 transitions, 15386 flow [2024-06-14 13:04:55,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 776 transitions, 15145 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:55,649 INFO L231 Difference]: Finished difference. Result has 485 places, 749 transitions, 13461 flow [2024-06-14 13:04:55,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13184, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13461, PETRI_PLACES=485, PETRI_TRANSITIONS=749} [2024-06-14 13:04:55,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-14 13:04:55,650 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 749 transitions, 13461 flow [2024-06-14 13:04:55,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:55,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:55,650 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] [2024-06-14 13:04:55,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:04:55,650 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:55,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:55,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1901020675, now seen corresponding path program 6 times [2024-06-14 13:04:55,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:55,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386368056] [2024-06-14 13:04:55,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:55,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:56,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:56,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386368056] [2024-06-14 13:04:56,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386368056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:56,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:56,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:56,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245190035] [2024-06-14 13:04:56,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:56,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:56,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:56,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:56,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 749 transitions, 13461 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:56,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:56,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:56,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:59,203 INFO L124 PetriNetUnfolderBase]: 5972/8967 cut-off events. [2024-06-14 13:04:59,203 INFO L125 PetriNetUnfolderBase]: For 2172660/2172662 co-relation queries the response was YES. [2024-06-14 13:04:59,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102646 conditions, 8967 events. 5972/8967 cut-off events. For 2172660/2172662 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 51336 event pairs, 1181 based on Foata normal form. 6/8968 useless extension candidates. Maximal degree in co-relation 102426. Up to 7749 conditions per place. [2024-06-14 13:04:59,404 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 538 selfloop transitions, 239 changer transitions 0/780 dead transitions. [2024-06-14 13:04:59,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 780 transitions, 15971 flow [2024-06-14 13:04:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:04:59,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 13:04:59,405 INFO L175 Difference]: Start difference. First operand has 485 places, 749 transitions, 13461 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:04:59,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 780 transitions, 15971 flow [2024-06-14 13:05:06,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 780 transitions, 15731 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:06,447 INFO L231 Difference]: Finished difference. Result has 486 places, 753 transitions, 13802 flow [2024-06-14 13:05:06,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13221, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13802, PETRI_PLACES=486, PETRI_TRANSITIONS=753} [2024-06-14 13:05:06,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-14 13:05:06,447 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 753 transitions, 13802 flow [2024-06-14 13:05:06,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:06,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:06,447 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] [2024-06-14 13:05:06,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:05:06,448 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:06,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:06,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1537461625, now seen corresponding path program 7 times [2024-06-14 13:05:06,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:06,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993161158] [2024-06-14 13:05:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:06,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993161158] [2024-06-14 13:05:07,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993161158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:07,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:07,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:05:07,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61511386] [2024-06-14 13:05:07,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:07,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:05:07,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:07,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:05:07,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:05:07,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:07,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 753 transitions, 13802 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:07,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:07,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:07,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:10,353 INFO L124 PetriNetUnfolderBase]: 6016/9029 cut-off events. [2024-06-14 13:05:10,354 INFO L125 PetriNetUnfolderBase]: For 2233263/2233277 co-relation queries the response was YES. [2024-06-14 13:05:10,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104626 conditions, 9029 events. 6016/9029 cut-off events. For 2233263/2233277 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51680 event pairs, 1183 based on Foata normal form. 9/9032 useless extension candidates. Maximal degree in co-relation 104405. Up to 7786 conditions per place. [2024-06-14 13:05:10,508 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 545 selfloop transitions, 237 changer transitions 0/785 dead transitions. [2024-06-14 13:05:10,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 785 transitions, 16433 flow [2024-06-14 13:05:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:05:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:05:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:05:10,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 13:05:10,509 INFO L175 Difference]: Start difference. First operand has 486 places, 753 transitions, 13802 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:05:10,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 785 transitions, 16433 flow [2024-06-14 13:05:17,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 785 transitions, 15760 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 13:05:17,573 INFO L231 Difference]: Finished difference. Result has 488 places, 760 transitions, 13793 flow [2024-06-14 13:05:17,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13155, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13793, PETRI_PLACES=488, PETRI_TRANSITIONS=760} [2024-06-14 13:05:17,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-14 13:05:17,573 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 760 transitions, 13793 flow [2024-06-14 13:05:17,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:17,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:17,573 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] [2024-06-14 13:05:17,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:05:17,573 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:17,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1541175301, now seen corresponding path program 5 times [2024-06-14 13:05:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:17,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191411504] [2024-06-14 13:05:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:18,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:18,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191411504] [2024-06-14 13:05:18,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191411504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:18,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:18,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:18,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880361076] [2024-06-14 13:05:18,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:18,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:18,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:18,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:18,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 760 transitions, 13793 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:18,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:18,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:18,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:21,553 INFO L124 PetriNetUnfolderBase]: 6084/9119 cut-off events. [2024-06-14 13:05:21,553 INFO L125 PetriNetUnfolderBase]: For 2307602/2307602 co-relation queries the response was YES. [2024-06-14 13:05:21,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106257 conditions, 9119 events. 6084/9119 cut-off events. For 2307602/2307602 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 52200 event pairs, 1186 based on Foata normal form. 4/9121 useless extension candidates. Maximal degree in co-relation 106035. Up to 8336 conditions per place. [2024-06-14 13:05:21,714 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 629 selfloop transitions, 169 changer transitions 0/801 dead transitions. [2024-06-14 13:05:21,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 801 transitions, 16474 flow [2024-06-14 13:05:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:05:21,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:05:21,715 INFO L175 Difference]: Start difference. First operand has 488 places, 760 transitions, 13793 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:05:21,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 801 transitions, 16474 flow [2024-06-14 13:05:28,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 801 transitions, 16064 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 13:05:28,095 INFO L231 Difference]: Finished difference. Result has 493 places, 769 transitions, 13922 flow [2024-06-14 13:05:28,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13383, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13922, PETRI_PLACES=493, PETRI_TRANSITIONS=769} [2024-06-14 13:05:28,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-14 13:05:28,096 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 769 transitions, 13922 flow [2024-06-14 13:05:28,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:28,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:28,096 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] [2024-06-14 13:05:28,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:05:28,096 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:28,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash 408868599, now seen corresponding path program 8 times [2024-06-14 13:05:28,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:28,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091238291] [2024-06-14 13:05:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:28,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:28,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091238291] [2024-06-14 13:05:28,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091238291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:28,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:28,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:28,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471481906] [2024-06-14 13:05:28,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:28,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:28,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:28,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:28,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:28,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:28,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 769 transitions, 13922 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:28,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:28,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:28,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:32,123 INFO L124 PetriNetUnfolderBase]: 6158/9221 cut-off events. [2024-06-14 13:05:32,123 INFO L125 PetriNetUnfolderBase]: For 2389107/2389107 co-relation queries the response was YES. [2024-06-14 13:05:32,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108229 conditions, 9221 events. 6158/9221 cut-off events. For 2389107/2389107 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 52778 event pairs, 1218 based on Foata normal form. 2/9221 useless extension candidates. Maximal degree in co-relation 108006. Up to 8835 conditions per place. [2024-06-14 13:05:32,405 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 694 selfloop transitions, 116 changer transitions 0/813 dead transitions. [2024-06-14 13:05:32,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 813 transitions, 16734 flow [2024-06-14 13:05:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:05:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:05:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-14 13:05:32,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37915742793791574 [2024-06-14 13:05:32,408 INFO L175 Difference]: Start difference. First operand has 493 places, 769 transitions, 13922 flow. Second operand 11 states and 171 transitions. [2024-06-14 13:05:32,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 813 transitions, 16734 flow [2024-06-14 13:05:39,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 813 transitions, 16464 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 13:05:39,319 INFO L231 Difference]: Finished difference. Result has 502 places, 782 transitions, 14242 flow [2024-06-14 13:05:39,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13652, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14242, PETRI_PLACES=502, PETRI_TRANSITIONS=782} [2024-06-14 13:05:39,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-14 13:05:39,320 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 782 transitions, 14242 flow [2024-06-14 13:05:39,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:39,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:39,320 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] [2024-06-14 13:05:39,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:05:39,320 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:39,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:39,321 INFO L85 PathProgramCache]: Analyzing trace with hash 408879945, now seen corresponding path program 6 times [2024-06-14 13:05:39,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:39,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556320063] [2024-06-14 13:05:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:39,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:40,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:40,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556320063] [2024-06-14 13:05:40,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556320063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:40,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:40,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:40,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408097693] [2024-06-14 13:05:40,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:40,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:40,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:40,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:40,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:40,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 782 transitions, 14242 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:40,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:40,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:40,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:43,214 INFO L124 PetriNetUnfolderBase]: 6146/9205 cut-off events. [2024-06-14 13:05:43,214 INFO L125 PetriNetUnfolderBase]: For 2413667/2413667 co-relation queries the response was YES. [2024-06-14 13:05:43,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107718 conditions, 9205 events. 6146/9205 cut-off events. For 2413667/2413667 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 52701 event pairs, 1199 based on Foata normal form. 4/9207 useless extension candidates. Maximal degree in co-relation 107492. Up to 8430 conditions per place. [2024-06-14 13:05:43,370 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 637 selfloop transitions, 172 changer transitions 0/812 dead transitions. [2024-06-14 13:05:43,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 812 transitions, 16500 flow [2024-06-14 13:05:43,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:05:43,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-14 13:05:43,371 INFO L175 Difference]: Start difference. First operand has 502 places, 782 transitions, 14242 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:05:43,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 812 transitions, 16500 flow [2024-06-14 13:05:50,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 812 transitions, 16162 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:50,936 INFO L231 Difference]: Finished difference. Result has 504 places, 782 transitions, 14254 flow [2024-06-14 13:05:50,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13904, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14254, PETRI_PLACES=504, PETRI_TRANSITIONS=782} [2024-06-14 13:05:50,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-14 13:05:50,937 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 782 transitions, 14254 flow [2024-06-14 13:05:50,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:50,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:50,937 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] [2024-06-14 13:05:50,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:05:50,938 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:50,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:50,938 INFO L85 PathProgramCache]: Analyzing trace with hash 408874396, now seen corresponding path program 1 times [2024-06-14 13:05:50,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:50,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706779745] [2024-06-14 13:05:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:50,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:52,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:52,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706779745] [2024-06-14 13:05:52,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706779745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:52,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:52,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:52,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574226793] [2024-06-14 13:05:52,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:52,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:52,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:52,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:52,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:52,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:52,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 782 transitions, 14254 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:52,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:52,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:52,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:55,482 INFO L124 PetriNetUnfolderBase]: 6143/9202 cut-off events. [2024-06-14 13:05:55,483 INFO L125 PetriNetUnfolderBase]: For 2417029/2417029 co-relation queries the response was YES. [2024-06-14 13:05:55,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107822 conditions, 9202 events. 6143/9202 cut-off events. For 2417029/2417029 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 52710 event pairs, 1325 based on Foata normal form. 1/9201 useless extension candidates. Maximal degree in co-relation 107595. Up to 9116 conditions per place. [2024-06-14 13:05:55,644 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 759 selfloop transitions, 39 changer transitions 0/801 dead transitions. [2024-06-14 13:05:55,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 801 transitions, 15916 flow [2024-06-14 13:05:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 13:05:55,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-14 13:05:55,645 INFO L175 Difference]: Start difference. First operand has 504 places, 782 transitions, 14254 flow. Second operand 9 states and 133 transitions. [2024-06-14 13:05:55,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 801 transitions, 15916 flow [2024-06-14 13:06:02,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 801 transitions, 15677 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:02,730 INFO L231 Difference]: Finished difference. Result has 507 places, 782 transitions, 14099 flow [2024-06-14 13:06:02,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14015, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14099, PETRI_PLACES=507, PETRI_TRANSITIONS=782} [2024-06-14 13:06:02,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-14 13:06:02,730 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 782 transitions, 14099 flow [2024-06-14 13:06:02,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:02,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:02,730 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] [2024-06-14 13:06:02,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:06:02,731 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:02,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:02,731 INFO L85 PathProgramCache]: Analyzing trace with hash 408880131, now seen corresponding path program 1 times [2024-06-14 13:06:02,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:02,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354914047] [2024-06-14 13:06:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:02,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:03,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:03,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354914047] [2024-06-14 13:06:03,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354914047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:03,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:03,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:03,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855121599] [2024-06-14 13:06:03,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:03,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:03,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 782 transitions, 14099 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:03,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:03,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:03,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:06,824 INFO L124 PetriNetUnfolderBase]: 6153/9216 cut-off events. [2024-06-14 13:06:06,825 INFO L125 PetriNetUnfolderBase]: For 2458912/2458912 co-relation queries the response was YES. [2024-06-14 13:06:06,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107778 conditions, 9216 events. 6153/9216 cut-off events. For 2458912/2458912 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 52824 event pairs, 1332 based on Foata normal form. 2/9216 useless extension candidates. Maximal degree in co-relation 107550. Up to 9080 conditions per place. [2024-06-14 13:06:06,999 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 743 selfloop transitions, 61 changer transitions 0/807 dead transitions. [2024-06-14 13:06:07,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 807 transitions, 15883 flow [2024-06-14 13:06:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:06:07,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-14 13:06:07,001 INFO L175 Difference]: Start difference. First operand has 507 places, 782 transitions, 14099 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:06:07,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 807 transitions, 15883 flow [2024-06-14 13:06:15,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 807 transitions, 15787 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:15,089 INFO L231 Difference]: Finished difference. Result has 509 places, 785 transitions, 14217 flow [2024-06-14 13:06:15,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14003, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14217, PETRI_PLACES=509, PETRI_TRANSITIONS=785} [2024-06-14 13:06:15,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-14 13:06:15,090 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 785 transitions, 14217 flow [2024-06-14 13:06:15,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:15,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:15,090 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] [2024-06-14 13:06:15,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 13:06:15,090 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:15,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:15,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1540034229, now seen corresponding path program 2 times [2024-06-14 13:06:15,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:15,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538307455] [2024-06-14 13:06:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:15,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:15,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538307455] [2024-06-14 13:06:15,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538307455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:15,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:15,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783843373] [2024-06-14 13:06:15,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:15,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:15,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:15,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:15,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:15,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:15,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 785 transitions, 14217 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:15,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:15,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:15,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:19,230 INFO L124 PetriNetUnfolderBase]: 6163/9230 cut-off events. [2024-06-14 13:06:19,230 INFO L125 PetriNetUnfolderBase]: For 2501019/2501019 co-relation queries the response was YES. [2024-06-14 13:06:19,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108322 conditions, 9230 events. 6163/9230 cut-off events. For 2501019/2501019 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 52880 event pairs, 1262 based on Foata normal form. 2/9230 useless extension candidates. Maximal degree in co-relation 108093. Up to 9085 conditions per place. [2024-06-14 13:06:19,403 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 742 selfloop transitions, 66 changer transitions 0/811 dead transitions. [2024-06-14 13:06:19,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 811 transitions, 16025 flow [2024-06-14 13:06:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 13:06:19,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-14 13:06:19,405 INFO L175 Difference]: Start difference. First operand has 509 places, 785 transitions, 14217 flow. Second operand 9 states and 142 transitions. [2024-06-14 13:06:19,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 811 transitions, 16025 flow [2024-06-14 13:06:27,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 811 transitions, 15843 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:27,143 INFO L231 Difference]: Finished difference. Result has 511 places, 788 transitions, 14265 flow [2024-06-14 13:06:27,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14035, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14265, PETRI_PLACES=511, PETRI_TRANSITIONS=788} [2024-06-14 13:06:27,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-14 13:06:27,144 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 788 transitions, 14265 flow [2024-06-14 13:06:27,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:27,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:27,144 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] [2024-06-14 13:06:27,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 13:06:27,144 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:27,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:27,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1540034601, now seen corresponding path program 9 times [2024-06-14 13:06:27,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:27,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548779164] [2024-06-14 13:06:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:27,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:27,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:27,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548779164] [2024-06-14 13:06:27,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548779164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:27,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:27,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:27,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447876115] [2024-06-14 13:06:27,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:27,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:27,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:27,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:27,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:28,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:28,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 788 transitions, 14265 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:28,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:28,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:28,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:31,182 INFO L124 PetriNetUnfolderBase]: 6151/9213 cut-off events. [2024-06-14 13:06:31,183 INFO L125 PetriNetUnfolderBase]: For 2519268/2519268 co-relation queries the response was YES. [2024-06-14 13:06:31,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107911 conditions, 9213 events. 6151/9213 cut-off events. For 2519268/2519268 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 52717 event pairs, 1194 based on Foata normal form. 4/9215 useless extension candidates. Maximal degree in co-relation 107681. Up to 8837 conditions per place. [2024-06-14 13:06:31,343 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 697 selfloop transitions, 114 changer transitions 0/814 dead transitions. [2024-06-14 13:06:31,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 814 transitions, 16531 flow [2024-06-14 13:06:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:06:31,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 13:06:31,345 INFO L175 Difference]: Start difference. First operand has 511 places, 788 transitions, 14265 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:06:31,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 814 transitions, 16531 flow