./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.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/mix035_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix035_pso.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix035_pso.opt_tso.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-bcb38a6-m [2024-06-03 19:39:51,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:39:51,769 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:39:51,774 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:39:51,775 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:39:51,803 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:39:51,806 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:39:51,807 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:39:51,807 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:39:51,822 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:39:51,822 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:39:51,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:39:51,823 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:39:51,824 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:39:51,824 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:39:51,825 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:39:51,825 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:39:51,825 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:39:51,826 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:39:51,826 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:39:51,826 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:39:51,829 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:39:51,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:39:51,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:39:51,830 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:39:51,830 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:39:51,830 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:39:51,830 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:39:51,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:39:51,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:39:51,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:39:51,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:39:51,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:39:51,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:39:51,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:39:51,833 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:39:51,833 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:39:51,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:39:51,834 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:39:51,834 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:39:51,834 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:39:51,835 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:39:51,835 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:39:51,835 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:39:52,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:39:52,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:39:52,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:39:52,136 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:39:52,137 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:39:52,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix035_pso.opt_tso.opt.yml/witness.yml [2024-06-03 19:39:52,357 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:39:52,358 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:39:52,359 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i [2024-06-03 19:39:53,537 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:39:53,809 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:39:53,810 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i [2024-06-03 19:39:53,824 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4d567c8/0aa400a9fd4f49d2841d8ce508a22e7a/FLAG70e329c00 [2024-06-03 19:39:53,837 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4d567c8/0aa400a9fd4f49d2841d8ce508a22e7a [2024-06-03 19:39:53,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:39:53,840 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:39:53,843 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:39:53,843 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:39:53,847 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:39:53,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:39:52" (1/2) ... [2024-06-03 19:39:53,849 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@727c44db and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:39:53, skipping insertion in model container [2024-06-03 19:39:53,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:39:52" (1/2) ... [2024-06-03 19:39:53,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43c76bd3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:39:53, skipping insertion in model container [2024-06-03 19:39:53,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:39:53" (2/2) ... [2024-06-03 19:39:53,852 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@727c44db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:53, skipping insertion in model container [2024-06-03 19:39:53,852 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:39:53" (2/2) ... [2024-06-03 19:39:53,852 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:39:53,959 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:39:53,960 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-03 19:39:53,960 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-03 19:39:53,961 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-03 19:39:53,961 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:39:53,961 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-03 19:39:54,009 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:39:54,418 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:39:54,429 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:39:54,557 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:39:54,599 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:39:54,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54 WrapperNode [2024-06-03 19:39:54,600 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:39:54,602 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:39:54,602 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:39:54,603 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:39:54,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,643 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,682 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 134 [2024-06-03 19:39:54,685 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:39:54,686 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:39:54,687 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:39:54,687 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:39:54,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,716 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,737 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]. [2024-06-03 19:39:54,743 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,754 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,765 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,767 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,774 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,777 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:39:54,778 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:39:54,778 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:39:54,778 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:39:54,779 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (1/1) ... [2024-06-03 19:39:54,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:39:54,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:39:54,808 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) [2024-06-03 19:39:54,836 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 [2024-06-03 19:39:54,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:39:54,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:39:54,850 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:39:54,851 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:39:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:39:54,851 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:39:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:39:54,851 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:39:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:39:54,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:39:54,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:39:54,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:39:54,853 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:39:54,979 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:39:54,981 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:39:55,412 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:39:55,414 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:39:55,604 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:39:55,605 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:39:55,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:39:55 BoogieIcfgContainer [2024-06-03 19:39:55,605 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:39:55,608 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:39:55,608 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:39:55,611 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:39:55,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:39:52" (1/4) ... [2024-06-03 19:39:55,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acac50f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:39:55, skipping insertion in model container [2024-06-03 19:39:55,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:39:53" (2/4) ... [2024-06-03 19:39:55,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acac50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:39:55, skipping insertion in model container [2024-06-03 19:39:55,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:39:54" (3/4) ... [2024-06-03 19:39:55,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acac50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:39:55, skipping insertion in model container [2024-06-03 19:39:55,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:39:55" (4/4) ... [2024-06-03 19:39:55,615 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035_pso.opt_tso.opt.i [2024-06-03 19:39:55,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:39:55,632 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:39:55,632 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:39:55,682 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:39:55,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:39:55,755 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-03 19:39:55,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:39:55,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:39:55,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:39:55,762 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-03 19:39:55,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:39:55,784 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;@6afe2675, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:39:55,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:39:55,790 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:39:55,791 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:39:55,791 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:39:55,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:55,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:39:55,792 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)] === [2024-06-03 19:39:55,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:55,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1632138003, now seen corresponding path program 1 times [2024-06-03 19:39:55,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:55,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303180435] [2024-06-03 19:39:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:55,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:57,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:57,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303180435] [2024-06-03 19:39:57,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303180435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:57,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:57,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:39:57,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7542134] [2024-06-03 19:39:57,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:57,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:39:57,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:39:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:39:57,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-03 19:39:57,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2024-06-03 19:39:57,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:57,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-03 19:39:57,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:57,619 INFO L124 PetriNetUnfolderBase]: 869/1439 cut-off events. [2024-06-03 19:39:57,619 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-03 19:39:57,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2819 conditions, 1439 events. 869/1439 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7341 event pairs, 566 based on Foata normal form. 1/1386 useless extension candidates. Maximal degree in co-relation 2804. Up to 1315 conditions per place. [2024-06-03 19:39:57,637 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-03 19:39:57,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-03 19:39:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:39:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:39:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-03 19:39:57,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-03 19:39:57,652 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-03 19:39:57,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-03 19:39:57,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:39:57,659 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-03 19:39:57,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-03 19:39:57,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-03 19:39:57,665 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-03 19:39:57,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2024-06-03 19:39:57,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:57,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:57,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:39:57,666 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)] === [2024-06-03 19:39:57,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash -821543540, now seen corresponding path program 1 times [2024-06-03 19:39:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:57,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790071284] [2024-06-03 19:39:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:57,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:58,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:58,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790071284] [2024-06-03 19:39:58,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790071284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:58,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:58,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:39:58,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493427797] [2024-06-03 19:39:58,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:58,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:39:58,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:58,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:39:58,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:39:58,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-03 19:39:58,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:58,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:58,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-03 19:39:58,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:59,011 INFO L124 PetriNetUnfolderBase]: 996/1590 cut-off events. [2024-06-03 19:39:59,011 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-06-03 19:39:59,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3607 conditions, 1590 events. 996/1590 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8017 event pairs, 519 based on Foata normal form. 3/1570 useless extension candidates. Maximal degree in co-relation 3592. Up to 1484 conditions per place. [2024-06-03 19:39:59,022 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-03 19:39:59,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-03 19:39:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:39:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:39:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-03 19:39:59,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-03 19:39:59,026 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-03 19:39:59,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-03 19:39:59,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:39:59,030 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-03 19:39:59,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-03 19:39:59,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-03 19:39:59,031 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-03 19:39:59,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:59,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:59,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:59,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:39:59,035 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)] === [2024-06-03 19:39:59,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1879442065, now seen corresponding path program 1 times [2024-06-03 19:39:59,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:59,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072344760] [2024-06-03 19:39:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:59,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:00,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:00,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072344760] [2024-06-03 19:40:00,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072344760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:00,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:00,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:40:00,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298185656] [2024-06-03 19:40:00,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:00,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:40:00,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:40:00,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:40:00,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:40:00,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:00,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:00,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:40:00,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:00,993 INFO L124 PetriNetUnfolderBase]: 1265/1984 cut-off events. [2024-06-03 19:40:00,994 INFO L125 PetriNetUnfolderBase]: For 1076/1076 co-relation queries the response was YES. [2024-06-03 19:40:00,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 1984 events. 1265/1984 cut-off events. For 1076/1076 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9784 event pairs, 445 based on Foata normal form. 6/1959 useless extension candidates. Maximal degree in co-relation 4966. Up to 1828 conditions per place. [2024-06-03 19:40:01,008 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-03 19:40:01,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 356 flow [2024-06-03 19:40:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:40:01,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:40:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 19:40:01,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387596899224806 [2024-06-03 19:40:01,014 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 139 transitions. [2024-06-03 19:40:01,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 356 flow [2024-06-03 19:40:01,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 336 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 19:40:01,018 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-03 19:40:01,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-03 19:40:01,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-03 19:40:01,020 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-03 19:40:01,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:01,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:01,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:01,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:40:01,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:01,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1919090944, now seen corresponding path program 1 times [2024-06-03 19:40:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:01,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595615745] [2024-06-03 19:40:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:01,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:01,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:01,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595615745] [2024-06-03 19:40:01,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595615745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:01,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:01,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:40:01,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776910311] [2024-06-03 19:40:01,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:01,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:40:01,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:01,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:40:01,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:40:01,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:40:01,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:01,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:01,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:40:01,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:02,433 INFO L124 PetriNetUnfolderBase]: 1085/1811 cut-off events. [2024-06-03 19:40:02,434 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-06-03 19:40:02,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4869 conditions, 1811 events. 1085/1811 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9338 event pairs, 442 based on Foata normal form. 4/1807 useless extension candidates. Maximal degree in co-relation 4850. Up to 1611 conditions per place. [2024-06-03 19:40:02,444 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 43 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-03 19:40:02,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 342 flow [2024-06-03 19:40:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:40:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:40:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-03 19:40:02,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-03 19:40:02,447 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 6 states and 119 transitions. [2024-06-03 19:40:02,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 342 flow [2024-06-03 19:40:02,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 313 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:02,452 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 218 flow [2024-06-03 19:40:02,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-03 19:40:02,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-03 19:40:02,454 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 218 flow [2024-06-03 19:40:02,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:02,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:02,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:02,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:40:02,455 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)] === [2024-06-03 19:40:02,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:02,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1425082109, now seen corresponding path program 1 times [2024-06-03 19:40:02,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:02,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804247236] [2024-06-03 19:40:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:02,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:03,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:03,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804247236] [2024-06-03 19:40:03,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804247236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:03,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:03,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:40:03,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053601365] [2024-06-03 19:40:03,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:03,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:40:03,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:40:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:40:03,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:03,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 218 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:03,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:03,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:03,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:04,129 INFO L124 PetriNetUnfolderBase]: 1277/2018 cut-off events. [2024-06-03 19:40:04,129 INFO L125 PetriNetUnfolderBase]: For 3037/3037 co-relation queries the response was YES. [2024-06-03 19:40:04,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6008 conditions, 2018 events. 1277/2018 cut-off events. For 3037/3037 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9927 event pairs, 487 based on Foata normal form. 4/2011 useless extension candidates. Maximal degree in co-relation 5986. Up to 1826 conditions per place. [2024-06-03 19:40:04,146 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 54 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-06-03 19:40:04,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 468 flow [2024-06-03 19:40:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:40:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:40:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-03 19:40:04,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:40:04,148 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 218 flow. Second operand 6 states and 129 transitions. [2024-06-03 19:40:04,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 468 flow [2024-06-03 19:40:04,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 446 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:04,152 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 280 flow [2024-06-03 19:40:04,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-03 19:40:04,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-03 19:40:04,153 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 280 flow [2024-06-03 19:40:04,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:04,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:04,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:04,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:40:04,154 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)] === [2024-06-03 19:40:04,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -760707647, now seen corresponding path program 2 times [2024-06-03 19:40:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:04,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782790939] [2024-06-03 19:40:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:05,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:05,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782790939] [2024-06-03 19:40:05,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782790939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:05,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:05,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:40:05,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540499920] [2024-06-03 19:40:05,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:05,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:40:05,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:40:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:40:05,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:05,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 280 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:05,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:05,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:05,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:05,716 INFO L124 PetriNetUnfolderBase]: 1267/2006 cut-off events. [2024-06-03 19:40:05,716 INFO L125 PetriNetUnfolderBase]: For 4382/4386 co-relation queries the response was YES. [2024-06-03 19:40:05,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6448 conditions, 2006 events. 1267/2006 cut-off events. For 4382/4386 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9883 event pairs, 485 based on Foata normal form. 8/2004 useless extension candidates. Maximal degree in co-relation 6425. Up to 1818 conditions per place. [2024-06-03 19:40:05,732 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-03 19:40:05,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 456 flow [2024-06-03 19:40:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:40:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:40:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 19:40:05,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:40:05,734 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 280 flow. Second operand 6 states and 123 transitions. [2024-06-03 19:40:05,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 456 flow [2024-06-03 19:40:05,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 425 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 19:40:05,744 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 289 flow [2024-06-03 19:40:05,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-06-03 19:40:05,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-03 19:40:05,746 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 289 flow [2024-06-03 19:40:05,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:05,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:05,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:05,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:40:05,747 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)] === [2024-06-03 19:40:05,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:05,748 INFO L85 PathProgramCache]: Analyzing trace with hash 206911127, now seen corresponding path program 1 times [2024-06-03 19:40:05,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:05,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094859665] [2024-06-03 19:40:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:06,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094859665] [2024-06-03 19:40:06,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094859665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:06,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:06,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:06,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635343604] [2024-06-03 19:40:06,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:06,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:06,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:06,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:06,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:06,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:06,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 289 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:06,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:06,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:06,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:07,563 INFO L124 PetriNetUnfolderBase]: 1289/2044 cut-off events. [2024-06-03 19:40:07,563 INFO L125 PetriNetUnfolderBase]: For 5260/5260 co-relation queries the response was YES. [2024-06-03 19:40:07,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6692 conditions, 2044 events. 1289/2044 cut-off events. For 5260/5260 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10197 event pairs, 513 based on Foata normal form. 4/2034 useless extension candidates. Maximal degree in co-relation 6667. Up to 1876 conditions per place. [2024-06-03 19:40:07,577 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-03 19:40:07,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 533 flow [2024-06-03 19:40:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:40:07,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-03 19:40:07,579 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 289 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:40:07,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 533 flow [2024-06-03 19:40:07,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 487 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:07,587 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 309 flow [2024-06-03 19:40:07,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-03 19:40:07,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-03 19:40:07,588 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 309 flow [2024-06-03 19:40:07,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:07,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:07,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:07,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:40:07,589 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)] === [2024-06-03 19:40:07,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1239447737, now seen corresponding path program 2 times [2024-06-03 19:40:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:07,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779333464] [2024-06-03 19:40:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:07,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:08,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:08,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779333464] [2024-06-03 19:40:08,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779333464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:08,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:08,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:08,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694225596] [2024-06-03 19:40:08,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:08,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:08,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:08,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 309 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:08,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:08,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:08,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:09,225 INFO L124 PetriNetUnfolderBase]: 1311/2090 cut-off events. [2024-06-03 19:40:09,225 INFO L125 PetriNetUnfolderBase]: For 7102/7102 co-relation queries the response was YES. [2024-06-03 19:40:09,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7259 conditions, 2090 events. 1311/2090 cut-off events. For 7102/7102 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10468 event pairs, 445 based on Foata normal form. 4/2081 useless extension candidates. Maximal degree in co-relation 7234. Up to 1797 conditions per place. [2024-06-03 19:40:09,250 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 58 selfloop transitions, 27 changer transitions 0/91 dead transitions. [2024-06-03 19:40:09,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 631 flow [2024-06-03 19:40:09,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 19:40:09,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4983388704318937 [2024-06-03 19:40:09,252 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 309 flow. Second operand 7 states and 150 transitions. [2024-06-03 19:40:09,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 631 flow [2024-06-03 19:40:09,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 589 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:09,259 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 391 flow [2024-06-03 19:40:09,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-03 19:40:09,261 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-03 19:40:09,262 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 391 flow [2024-06-03 19:40:09,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:09,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:09,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:09,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:40:09,262 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)] === [2024-06-03 19:40:09,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:09,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2107099049, now seen corresponding path program 3 times [2024-06-03 19:40:09,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:09,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55817437] [2024-06-03 19:40:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:09,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:10,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:10,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55817437] [2024-06-03 19:40:10,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55817437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:10,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:10,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:10,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420379006] [2024-06-03 19:40:10,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:10,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:10,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:10,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:10,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:10,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:10,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:10,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:10,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:10,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:10,942 INFO L124 PetriNetUnfolderBase]: 1301/2075 cut-off events. [2024-06-03 19:40:10,942 INFO L125 PetriNetUnfolderBase]: For 9351/9353 co-relation queries the response was YES. [2024-06-03 19:40:10,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7661 conditions, 2075 events. 1301/2075 cut-off events. For 9351/9353 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10329 event pairs, 454 based on Foata normal form. 4/2066 useless extension candidates. Maximal degree in co-relation 7635. Up to 1789 conditions per place. [2024-06-03 19:40:10,957 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 54 selfloop transitions, 26 changer transitions 0/86 dead transitions. [2024-06-03 19:40:10,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 607 flow [2024-06-03 19:40:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:40:10,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-03 19:40:10,959 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 391 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:40:10,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 607 flow [2024-06-03 19:40:11,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 554 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:11,009 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 398 flow [2024-06-03 19:40:11,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-03 19:40:11,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-03 19:40:11,010 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 398 flow [2024-06-03 19:40:11,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:11,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:11,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:11,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:40:11,011 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)] === [2024-06-03 19:40:11,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1246123091, now seen corresponding path program 1 times [2024-06-03 19:40:11,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:11,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008318972] [2024-06-03 19:40:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:11,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:12,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:12,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008318972] [2024-06-03 19:40:12,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008318972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:12,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:12,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:12,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707488022] [2024-06-03 19:40:12,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:12,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:12,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:12,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:40:12,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 398 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:12,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:12,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:40:12,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:13,240 INFO L124 PetriNetUnfolderBase]: 1123/1875 cut-off events. [2024-06-03 19:40:13,240 INFO L125 PetriNetUnfolderBase]: For 8972/8972 co-relation queries the response was YES. [2024-06-03 19:40:13,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6953 conditions, 1875 events. 1123/1875 cut-off events. For 8972/8972 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9653 event pairs, 386 based on Foata normal form. 4/1865 useless extension candidates. Maximal degree in co-relation 6925. Up to 1649 conditions per place. [2024-06-03 19:40:13,255 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 67 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-03 19:40:13,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 649 flow [2024-06-03 19:40:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:40:13,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-03 19:40:13,257 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 398 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:40:13,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 649 flow [2024-06-03 19:40:13,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 575 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:13,268 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 410 flow [2024-06-03 19:40:13,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=410, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-03 19:40:13,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-03 19:40:13,269 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 410 flow [2024-06-03 19:40:13,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:13,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:13,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:13,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:40:13,270 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:13,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:13,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1781372754, now seen corresponding path program 1 times [2024-06-03 19:40:13,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:13,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104346660] [2024-06-03 19:40:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:13,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:14,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:14,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104346660] [2024-06-03 19:40:14,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104346660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:14,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:14,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:40:14,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27570462] [2024-06-03 19:40:14,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:14,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:40:14,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:40:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:40:14,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-03 19:40:14,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 410 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:14,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:14,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-03 19:40:14,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:14,678 INFO L124 PetriNetUnfolderBase]: 1015/1751 cut-off events. [2024-06-03 19:40:14,678 INFO L125 PetriNetUnfolderBase]: For 10269/10271 co-relation queries the response was YES. [2024-06-03 19:40:14,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 1751 events. 1015/1751 cut-off events. For 10269/10271 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9351 event pairs, 395 based on Foata normal form. 3/1728 useless extension candidates. Maximal degree in co-relation 6795. Up to 1528 conditions per place. [2024-06-03 19:40:14,692 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 59 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2024-06-03 19:40:14,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 582 flow [2024-06-03 19:40:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:40:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:40:14,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-03 19:40:14,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-03 19:40:14,694 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 410 flow. Second operand 5 states and 105 transitions. [2024-06-03 19:40:14,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 582 flow [2024-06-03 19:40:14,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 541 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:14,707 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 417 flow [2024-06-03 19:40:14,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=417, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-03 19:40:14,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-03 19:40:14,708 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 417 flow [2024-06-03 19:40:14,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:14,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:14,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:14,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:40:14,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:14,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:14,709 INFO L85 PathProgramCache]: Analyzing trace with hash -612017814, now seen corresponding path program 1 times [2024-06-03 19:40:14,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:14,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659836396] [2024-06-03 19:40:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:14,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:15,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:15,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659836396] [2024-06-03 19:40:15,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659836396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:15,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:15,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:40:15,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550350177] [2024-06-03 19:40:15,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:15,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:40:15,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:15,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:40:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:40:15,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:40:15,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:15,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:15,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:40:15,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:16,253 INFO L124 PetriNetUnfolderBase]: 1167/1932 cut-off events. [2024-06-03 19:40:16,253 INFO L125 PetriNetUnfolderBase]: For 13965/13967 co-relation queries the response was YES. [2024-06-03 19:40:16,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8032 conditions, 1932 events. 1167/1932 cut-off events. For 13965/13967 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10040 event pairs, 467 based on Foata normal form. 3/1929 useless extension candidates. Maximal degree in co-relation 8001. Up to 1751 conditions per place. [2024-06-03 19:40:16,268 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 61 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2024-06-03 19:40:16,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 605 flow [2024-06-03 19:40:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:40:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:40:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-03 19:40:16,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 19:40:16,271 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 417 flow. Second operand 6 states and 117 transitions. [2024-06-03 19:40:16,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 605 flow [2024-06-03 19:40:16,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 579 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:16,283 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 449 flow [2024-06-03 19:40:16,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2024-06-03 19:40:16,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-03 19:40:16,284 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 449 flow [2024-06-03 19:40:16,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:16,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:16,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:16,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:40:16,286 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)] === [2024-06-03 19:40:16,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1701548530, now seen corresponding path program 1 times [2024-06-03 19:40:16,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:16,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630008421] [2024-06-03 19:40:16,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:16,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:17,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:17,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630008421] [2024-06-03 19:40:17,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630008421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:17,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:17,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:17,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644385988] [2024-06-03 19:40:17,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:17,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:17,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:17,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:17,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:17,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:17,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 449 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:17,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:17,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:17,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:18,277 INFO L124 PetriNetUnfolderBase]: 1511/2408 cut-off events. [2024-06-03 19:40:18,277 INFO L125 PetriNetUnfolderBase]: For 22817/22817 co-relation queries the response was YES. [2024-06-03 19:40:18,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10772 conditions, 2408 events. 1511/2408 cut-off events. For 22817/22817 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12512 event pairs, 425 based on Foata normal form. 16/2423 useless extension candidates. Maximal degree in co-relation 10740. Up to 1921 conditions per place. [2024-06-03 19:40:18,296 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 95 selfloop transitions, 19 changer transitions 0/121 dead transitions. [2024-06-03 19:40:18,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 895 flow [2024-06-03 19:40:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-03 19:40:18,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-03 19:40:18,299 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 449 flow. Second operand 9 states and 188 transitions. [2024-06-03 19:40:18,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 895 flow [2024-06-03 19:40:18,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 859 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:18,319 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 495 flow [2024-06-03 19:40:18,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=495, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2024-06-03 19:40:18,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-03 19:40:18,320 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 495 flow [2024-06-03 19:40:18,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:18,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:18,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:18,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:40:18,321 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)] === [2024-06-03 19:40:18,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1016838898, now seen corresponding path program 2 times [2024-06-03 19:40:18,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:18,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154459327] [2024-06-03 19:40:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:18,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:19,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:19,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154459327] [2024-06-03 19:40:19,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154459327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:19,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:19,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:19,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984684751] [2024-06-03 19:40:19,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:19,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:19,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:19,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:19,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:19,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:19,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 495 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:19,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:19,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:19,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:20,285 INFO L124 PetriNetUnfolderBase]: 1475/2353 cut-off events. [2024-06-03 19:40:20,285 INFO L125 PetriNetUnfolderBase]: For 24468/24468 co-relation queries the response was YES. [2024-06-03 19:40:20,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10652 conditions, 2353 events. 1475/2353 cut-off events. For 24468/24468 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12143 event pairs, 529 based on Foata normal form. 20/2372 useless extension candidates. Maximal degree in co-relation 10619. Up to 2033 conditions per place. [2024-06-03 19:40:20,301 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 88 selfloop transitions, 16 changer transitions 0/111 dead transitions. [2024-06-03 19:40:20,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 111 transitions, 809 flow [2024-06-03 19:40:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 19:40:20,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-03 19:40:20,303 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 495 flow. Second operand 8 states and 165 transitions. [2024-06-03 19:40:20,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 111 transitions, 809 flow [2024-06-03 19:40:20,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 111 transitions, 777 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:20,323 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 502 flow [2024-06-03 19:40:20,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=502, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2024-06-03 19:40:20,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-03 19:40:20,324 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 502 flow [2024-06-03 19:40:20,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:20,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:20,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:20,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:40:20,325 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)] === [2024-06-03 19:40:20,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:20,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1761727544, now seen corresponding path program 3 times [2024-06-03 19:40:20,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:20,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163871411] [2024-06-03 19:40:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:20,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:21,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:21,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163871411] [2024-06-03 19:40:21,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163871411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:21,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:21,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:21,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130934138] [2024-06-03 19:40:21,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:21,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:21,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:21,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:21,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:21,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:21,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 502 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:21,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:21,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:21,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:22,205 INFO L124 PetriNetUnfolderBase]: 1550/2476 cut-off events. [2024-06-03 19:40:22,205 INFO L125 PetriNetUnfolderBase]: For 27830/27830 co-relation queries the response was YES. [2024-06-03 19:40:22,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11358 conditions, 2476 events. 1550/2476 cut-off events. For 27830/27830 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12931 event pairs, 489 based on Foata normal form. 20/2494 useless extension candidates. Maximal degree in co-relation 11323. Up to 2053 conditions per place. [2024-06-03 19:40:22,219 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 30 changer transitions 0/111 dead transitions. [2024-06-03 19:40:22,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 111 transitions, 834 flow [2024-06-03 19:40:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 19:40:22,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49127906976744184 [2024-06-03 19:40:22,222 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 502 flow. Second operand 8 states and 169 transitions. [2024-06-03 19:40:22,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 111 transitions, 834 flow [2024-06-03 19:40:22,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 797 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:22,244 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 554 flow [2024-06-03 19:40:22,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=554, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2024-06-03 19:40:22,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-03 19:40:22,245 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 554 flow [2024-06-03 19:40:22,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:22,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:22,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:22,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:40:22,246 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)] === [2024-06-03 19:40:22,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:22,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1761912242, now seen corresponding path program 1 times [2024-06-03 19:40:22,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:22,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233651178] [2024-06-03 19:40:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:22,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:23,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:23,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233651178] [2024-06-03 19:40:23,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233651178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:23,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:23,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:23,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692075085] [2024-06-03 19:40:23,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:23,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:23,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:23,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:23,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:23,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:23,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 554 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:23,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:23,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:23,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:24,295 INFO L124 PetriNetUnfolderBase]: 1567/2508 cut-off events. [2024-06-03 19:40:24,295 INFO L125 PetriNetUnfolderBase]: For 30154/30154 co-relation queries the response was YES. [2024-06-03 19:40:24,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11769 conditions, 2508 events. 1567/2508 cut-off events. For 30154/30154 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13209 event pairs, 504 based on Foata normal form. 4/2510 useless extension candidates. Maximal degree in co-relation 11733. Up to 2261 conditions per place. [2024-06-03 19:40:24,339 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 79 selfloop transitions, 24 changer transitions 0/110 dead transitions. [2024-06-03 19:40:24,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 110 transitions, 879 flow [2024-06-03 19:40:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-03 19:40:24,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-03 19:40:24,341 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 554 flow. Second operand 8 states and 162 transitions. [2024-06-03 19:40:24,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 110 transitions, 879 flow [2024-06-03 19:40:24,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 110 transitions, 810 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:24,374 INFO L231 Difference]: Finished difference. Result has 87 places, 83 transitions, 597 flow [2024-06-03 19:40:24,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=597, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2024-06-03 19:40:24,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-03 19:40:24,375 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 597 flow [2024-06-03 19:40:24,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:24,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:24,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:24,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:40:24,376 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:24,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:24,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1804123087, now seen corresponding path program 1 times [2024-06-03 19:40:24,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:24,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223902922] [2024-06-03 19:40:24,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:24,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:25,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:25,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223902922] [2024-06-03 19:40:25,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223902922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:25,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:25,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:40:25,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811038984] [2024-06-03 19:40:25,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:25,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:40:25,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:25,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:40:25,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:40:25,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:40:25,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 597 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:25,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:25,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:40:25,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:25,926 INFO L124 PetriNetUnfolderBase]: 1491/2423 cut-off events. [2024-06-03 19:40:25,926 INFO L125 PetriNetUnfolderBase]: For 32489/32489 co-relation queries the response was YES. [2024-06-03 19:40:25,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11827 conditions, 2423 events. 1491/2423 cut-off events. For 32489/32489 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12952 event pairs, 512 based on Foata normal form. 2/2415 useless extension candidates. Maximal degree in co-relation 11789. Up to 2181 conditions per place. [2024-06-03 19:40:25,940 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 73 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-03 19:40:25,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 833 flow [2024-06-03 19:40:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:40:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:40:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 19:40:25,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:40:25,942 INFO L175 Difference]: Start difference. First operand has 87 places, 83 transitions, 597 flow. Second operand 6 states and 123 transitions. [2024-06-03 19:40:25,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 833 flow [2024-06-03 19:40:25,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 100 transitions, 766 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:25,970 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 595 flow [2024-06-03 19:40:25,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=595, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-06-03 19:40:25,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-03 19:40:25,971 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 595 flow [2024-06-03 19:40:25,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:25,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:25,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:25,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:40:25,972 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)] === [2024-06-03 19:40:25,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash 186426424, now seen corresponding path program 4 times [2024-06-03 19:40:25,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:25,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497390485] [2024-06-03 19:40:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:25,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:26,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:26,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497390485] [2024-06-03 19:40:26,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497390485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:26,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:26,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:26,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765562555] [2024-06-03 19:40:26,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:26,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:26,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:26,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:26,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:27,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:27,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 595 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:27,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:27,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:27,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:27,796 INFO L124 PetriNetUnfolderBase]: 1632/2595 cut-off events. [2024-06-03 19:40:27,797 INFO L125 PetriNetUnfolderBase]: For 37772/37774 co-relation queries the response was YES. [2024-06-03 19:40:27,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12824 conditions, 2595 events. 1632/2595 cut-off events. For 37772/37774 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13517 event pairs, 506 based on Foata normal form. 20/2613 useless extension candidates. Maximal degree in co-relation 12785. Up to 2171 conditions per place. [2024-06-03 19:40:27,809 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 81 selfloop transitions, 30 changer transitions 0/118 dead transitions. [2024-06-03 19:40:27,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 949 flow [2024-06-03 19:40:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 19:40:27,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-03 19:40:27,811 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 595 flow. Second operand 8 states and 165 transitions. [2024-06-03 19:40:27,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 949 flow [2024-06-03 19:40:27,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 118 transitions, 908 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:27,837 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 647 flow [2024-06-03 19:40:27,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=647, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2024-06-03 19:40:27,837 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-03 19:40:27,837 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 647 flow [2024-06-03 19:40:27,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:27,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:27,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:27,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:40:27,838 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)] === [2024-06-03 19:40:27,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:27,839 INFO L85 PathProgramCache]: Analyzing trace with hash -780109070, now seen corresponding path program 2 times [2024-06-03 19:40:27,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:27,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354417766] [2024-06-03 19:40:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:27,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:29,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:29,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354417766] [2024-06-03 19:40:29,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354417766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:29,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:29,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:29,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909334889] [2024-06-03 19:40:29,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:29,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:29,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:29,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:29,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:29,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:29,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 647 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:29,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:29,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:29,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:29,723 INFO L124 PetriNetUnfolderBase]: 1660/2646 cut-off events. [2024-06-03 19:40:29,724 INFO L125 PetriNetUnfolderBase]: For 40056/40060 co-relation queries the response was YES. [2024-06-03 19:40:29,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13354 conditions, 2646 events. 1660/2646 cut-off events. For 40056/40060 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13892 event pairs, 534 based on Foata normal form. 8/2653 useless extension candidates. Maximal degree in co-relation 13314. Up to 2391 conditions per place. [2024-06-03 19:40:29,738 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 83 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-03 19:40:29,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 119 transitions, 1013 flow [2024-06-03 19:40:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:40:29,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-03 19:40:29,740 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 647 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:40:29,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 119 transitions, 1013 flow [2024-06-03 19:40:29,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 119 transitions, 934 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:29,771 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 729 flow [2024-06-03 19:40:29,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=729, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-06-03 19:40:29,772 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-03 19:40:29,772 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 729 flow [2024-06-03 19:40:29,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:29,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:29,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:29,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:40:29,773 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)] === [2024-06-03 19:40:29,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:29,774 INFO L85 PathProgramCache]: Analyzing trace with hash -771538190, now seen corresponding path program 3 times [2024-06-03 19:40:29,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:29,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181651007] [2024-06-03 19:40:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:29,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:31,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181651007] [2024-06-03 19:40:31,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181651007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:31,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:31,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:31,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664330399] [2024-06-03 19:40:31,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:31,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:31,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:31,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:31,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:31,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:31,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 729 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:31,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:31,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:31,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:31,828 INFO L124 PetriNetUnfolderBase]: 1677/2683 cut-off events. [2024-06-03 19:40:31,828 INFO L125 PetriNetUnfolderBase]: For 43712/43716 co-relation queries the response was YES. [2024-06-03 19:40:31,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13870 conditions, 2683 events. 1677/2683 cut-off events. For 43712/43716 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14180 event pairs, 470 based on Foata normal form. 8/2690 useless extension candidates. Maximal degree in co-relation 13828. Up to 2335 conditions per place. [2024-06-03 19:40:31,843 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 83 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2024-06-03 19:40:31,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 126 transitions, 1177 flow [2024-06-03 19:40:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:40:31,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-03 19:40:31,846 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 729 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:40:31,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 126 transitions, 1177 flow [2024-06-03 19:40:31,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 126 transitions, 1116 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:31,873 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 823 flow [2024-06-03 19:40:31,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=823, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-06-03 19:40:31,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-03 19:40:31,873 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 823 flow [2024-06-03 19:40:31,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:31,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:31,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:31,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:40:31,874 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)] === [2024-06-03 19:40:31,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:31,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1008010220, now seen corresponding path program 4 times [2024-06-03 19:40:31,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:31,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938858322] [2024-06-03 19:40:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:31,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:32,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:32,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938858322] [2024-06-03 19:40:32,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938858322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:32,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:32,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:32,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801292206] [2024-06-03 19:40:32,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:32,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:32,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:32,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:32,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:33,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:33,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 823 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:33,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:33,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:33,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:33,807 INFO L124 PetriNetUnfolderBase]: 1669/2671 cut-off events. [2024-06-03 19:40:33,807 INFO L125 PetriNetUnfolderBase]: For 46397/46401 co-relation queries the response was YES. [2024-06-03 19:40:33,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13771 conditions, 2671 events. 1669/2671 cut-off events. For 46397/46401 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14069 event pairs, 542 based on Foata normal form. 8/2678 useless extension candidates. Maximal degree in co-relation 13728. Up to 2406 conditions per place. [2024-06-03 19:40:33,822 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 88 selfloop transitions, 28 changer transitions 0/123 dead transitions. [2024-06-03 19:40:33,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 123 transitions, 1117 flow [2024-06-03 19:40:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:40:33,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-03 19:40:33,824 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 823 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:40:33,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 123 transitions, 1117 flow [2024-06-03 19:40:33,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 123 transitions, 1031 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:33,875 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 800 flow [2024-06-03 19:40:33,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=800, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-06-03 19:40:33,876 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-03 19:40:33,876 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 800 flow [2024-06-03 19:40:33,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:33,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:33,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:33,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:40:33,877 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:33,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:33,877 INFO L85 PathProgramCache]: Analyzing trace with hash -878409457, now seen corresponding path program 2 times [2024-06-03 19:40:33,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:33,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298920238] [2024-06-03 19:40:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:33,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:34,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298920238] [2024-06-03 19:40:34,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298920238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:34,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:34,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:40:34,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137625487] [2024-06-03 19:40:34,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:34,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:40:34,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:34,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:40:34,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:40:34,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:40:34,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 800 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:34,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:34,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:40:34,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:35,184 INFO L124 PetriNetUnfolderBase]: 1551/2529 cut-off events. [2024-06-03 19:40:35,184 INFO L125 PetriNetUnfolderBase]: For 49112/49112 co-relation queries the response was YES. [2024-06-03 19:40:35,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13233 conditions, 2529 events. 1551/2529 cut-off events. For 49112/49112 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13700 event pairs, 526 based on Foata normal form. 2/2518 useless extension candidates. Maximal degree in co-relation 13188. Up to 2266 conditions per place. [2024-06-03 19:40:35,197 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 75 selfloop transitions, 18 changer transitions 0/111 dead transitions. [2024-06-03 19:40:35,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 111 transitions, 1040 flow [2024-06-03 19:40:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:40:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:40:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-03 19:40:35,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-03 19:40:35,199 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 800 flow. Second operand 6 states and 119 transitions. [2024-06-03 19:40:35,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 111 transitions, 1040 flow [2024-06-03 19:40:35,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 943 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 19:40:35,227 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 781 flow [2024-06-03 19:40:35,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=781, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2024-06-03 19:40:35,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-03 19:40:35,227 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 781 flow [2024-06-03 19:40:35,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:35,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:35,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:35,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:40:35,228 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:35,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:35,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1798403215, now seen corresponding path program 1 times [2024-06-03 19:40:35,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:35,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220049663] [2024-06-03 19:40:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:35,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:36,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:36,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220049663] [2024-06-03 19:40:36,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220049663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:36,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:36,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:40:36,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527319405] [2024-06-03 19:40:36,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:36,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:40:36,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:40:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:40:36,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:40:36,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 781 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:36,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:36,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:40:36,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:36,474 INFO L124 PetriNetUnfolderBase]: 1503/2482 cut-off events. [2024-06-03 19:40:36,474 INFO L125 PetriNetUnfolderBase]: For 45553/45553 co-relation queries the response was YES. [2024-06-03 19:40:36,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12868 conditions, 2482 events. 1503/2482 cut-off events. For 45553/45553 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13456 event pairs, 464 based on Foata normal form. 2/2483 useless extension candidates. Maximal degree in co-relation 12824. Up to 2248 conditions per place. [2024-06-03 19:40:36,488 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 12 changer transitions 0/117 dead transitions. [2024-06-03 19:40:36,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 117 transitions, 1061 flow [2024-06-03 19:40:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:40:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:40:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-03 19:40:36,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-03 19:40:36,489 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 781 flow. Second operand 6 states and 121 transitions. [2024-06-03 19:40:36,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 117 transitions, 1061 flow [2024-06-03 19:40:36,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 117 transitions, 1005 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:36,560 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 791 flow [2024-06-03 19:40:36,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=791, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2024-06-03 19:40:36,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-03 19:40:36,560 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 791 flow [2024-06-03 19:40:36,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:36,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:36,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:36,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:40:36,561 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:36,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash -878403505, now seen corresponding path program 2 times [2024-06-03 19:40:36,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:36,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210529078] [2024-06-03 19:40:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:36,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:37,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:37,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210529078] [2024-06-03 19:40:37,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210529078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:37,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:37,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:40:37,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453675905] [2024-06-03 19:40:37,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:37,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:40:37,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:40:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:40:37,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:40:37,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 791 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:37,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:37,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:40:37,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:37,935 INFO L124 PetriNetUnfolderBase]: 1505/2488 cut-off events. [2024-06-03 19:40:37,935 INFO L125 PetriNetUnfolderBase]: For 49184/49186 co-relation queries the response was YES. [2024-06-03 19:40:37,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13250 conditions, 2488 events. 1505/2488 cut-off events. For 49184/49186 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13490 event pairs, 468 based on Foata normal form. 4/2491 useless extension candidates. Maximal degree in co-relation 13205. Up to 2242 conditions per place. [2024-06-03 19:40:37,950 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-06-03 19:40:37,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 118 transitions, 1075 flow [2024-06-03 19:40:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:40:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:40:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-03 19:40:37,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-03 19:40:37,951 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 791 flow. Second operand 6 states and 121 transitions. [2024-06-03 19:40:37,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 118 transitions, 1075 flow [2024-06-03 19:40:37,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 118 transitions, 1031 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:37,991 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 829 flow [2024-06-03 19:40:37,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=829, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-03 19:40:37,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-03 19:40:37,992 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 829 flow [2024-06-03 19:40:37,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:37,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:37,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:40:37,993 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:37,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:37,993 INFO L85 PathProgramCache]: Analyzing trace with hash -878395569, now seen corresponding path program 1 times [2024-06-03 19:40:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:37,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583840396] [2024-06-03 19:40:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:39,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:39,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583840396] [2024-06-03 19:40:39,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583840396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:39,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:39,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:39,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672567360] [2024-06-03 19:40:39,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:39,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:39,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:39,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:39,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:39,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:40:39,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 829 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:39,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:39,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:40:39,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:39,508 INFO L124 PetriNetUnfolderBase]: 1488/2479 cut-off events. [2024-06-03 19:40:39,508 INFO L125 PetriNetUnfolderBase]: For 53137/53137 co-relation queries the response was YES. [2024-06-03 19:40:39,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13537 conditions, 2479 events. 1488/2479 cut-off events. For 53137/53137 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13705 event pairs, 498 based on Foata normal form. 1/2470 useless extension candidates. Maximal degree in co-relation 13491. Up to 2224 conditions per place. [2024-06-03 19:40:39,523 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 88 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2024-06-03 19:40:39,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 120 transitions, 1091 flow [2024-06-03 19:40:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:40:39,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:40:39,525 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 829 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:40:39,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 120 transitions, 1091 flow [2024-06-03 19:40:39,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 120 transitions, 1031 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:39,559 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 845 flow [2024-06-03 19:40:39,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-06-03 19:40:39,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-03 19:40:39,560 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 845 flow [2024-06-03 19:40:39,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:39,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:39,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:39,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:40:39,561 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:39,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:39,561 INFO L85 PathProgramCache]: Analyzing trace with hash 742020906, now seen corresponding path program 1 times [2024-06-03 19:40:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:39,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012984679] [2024-06-03 19:40:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:39,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:40,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:40,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012984679] [2024-06-03 19:40:40,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012984679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:40,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:40,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:40,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780014577] [2024-06-03 19:40:40,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:40,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:40,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:40,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:40,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 845 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:40,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:40,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:40,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:41,706 INFO L124 PetriNetUnfolderBase]: 1792/2907 cut-off events. [2024-06-03 19:40:41,706 INFO L125 PetriNetUnfolderBase]: For 70154/70154 co-relation queries the response was YES. [2024-06-03 19:40:41,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16397 conditions, 2907 events. 1792/2907 cut-off events. For 70154/70154 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15898 event pairs, 527 based on Foata normal form. 12/2917 useless extension candidates. Maximal degree in co-relation 16350. Up to 2283 conditions per place. [2024-06-03 19:40:41,726 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 106 selfloop transitions, 43 changer transitions 0/156 dead transitions. [2024-06-03 19:40:41,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 156 transitions, 1357 flow [2024-06-03 19:40:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-03 19:40:41,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-03 19:40:41,728 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 845 flow. Second operand 9 states and 187 transitions. [2024-06-03 19:40:41,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 156 transitions, 1357 flow [2024-06-03 19:40:41,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 156 transitions, 1303 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:41,787 INFO L231 Difference]: Finished difference. Result has 114 places, 119 transitions, 997 flow [2024-06-03 19:40:41,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=997, PETRI_PLACES=114, PETRI_TRANSITIONS=119} [2024-06-03 19:40:41,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-03 19:40:41,789 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 119 transitions, 997 flow [2024-06-03 19:40:41,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:41,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:41,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:41,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:40:41,790 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:41,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:41,790 INFO L85 PathProgramCache]: Analyzing trace with hash -891033951, now seen corresponding path program 1 times [2024-06-03 19:40:41,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:41,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563845636] [2024-06-03 19:40:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:41,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:42,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:42,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563845636] [2024-06-03 19:40:42,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563845636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:42,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:42,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:42,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466234362] [2024-06-03 19:40:42,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:42,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:42,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:42,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:42,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 119 transitions, 997 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:42,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:42,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:42,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:43,409 INFO L124 PetriNetUnfolderBase]: 1756/2867 cut-off events. [2024-06-03 19:40:43,409 INFO L125 PetriNetUnfolderBase]: For 73919/73919 co-relation queries the response was YES. [2024-06-03 19:40:43,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16824 conditions, 2867 events. 1756/2867 cut-off events. For 73919/73919 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15832 event pairs, 555 based on Foata normal form. 2/2852 useless extension candidates. Maximal degree in co-relation 16774. Up to 2635 conditions per place. [2024-06-03 19:40:43,428 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 104 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2024-06-03 19:40:43,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 137 transitions, 1313 flow [2024-06-03 19:40:43,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:40:43,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:40:43,429 INFO L175 Difference]: Start difference. First operand has 114 places, 119 transitions, 997 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:40:43,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 137 transitions, 1313 flow [2024-06-03 19:40:43,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 1235 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:43,486 INFO L231 Difference]: Finished difference. Result has 117 places, 122 transitions, 999 flow [2024-06-03 19:40:43,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=999, PETRI_PLACES=117, PETRI_TRANSITIONS=122} [2024-06-03 19:40:43,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-03 19:40:43,487 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 122 transitions, 999 flow [2024-06-03 19:40:43,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:43,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:43,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:43,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:40:43,488 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)] === [2024-06-03 19:40:43,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1842924644, now seen corresponding path program 2 times [2024-06-03 19:40:43,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:43,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681439138] [2024-06-03 19:40:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:43,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:44,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:44,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681439138] [2024-06-03 19:40:44,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681439138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:44,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:44,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:44,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489709270] [2024-06-03 19:40:44,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:44,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:44,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:44,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:44,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:44,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:44,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 999 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:44,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:44,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:44,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:45,703 INFO L124 PetriNetUnfolderBase]: 1920/3131 cut-off events. [2024-06-03 19:40:45,704 INFO L125 PetriNetUnfolderBase]: For 81928/81928 co-relation queries the response was YES. [2024-06-03 19:40:45,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18303 conditions, 3131 events. 1920/3131 cut-off events. For 81928/81928 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17462 event pairs, 521 based on Foata normal form. 12/3142 useless extension candidates. Maximal degree in co-relation 18252. Up to 2576 conditions per place. [2024-06-03 19:40:45,723 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 107 selfloop transitions, 51 changer transitions 0/166 dead transitions. [2024-06-03 19:40:45,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 166 transitions, 1533 flow [2024-06-03 19:40:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-03 19:40:45,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-03 19:40:45,724 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 999 flow. Second operand 10 states and 198 transitions. [2024-06-03 19:40:45,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 166 transitions, 1533 flow [2024-06-03 19:40:45,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 166 transitions, 1473 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:45,799 INFO L231 Difference]: Finished difference. Result has 125 places, 132 transitions, 1178 flow [2024-06-03 19:40:45,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1178, PETRI_PLACES=125, PETRI_TRANSITIONS=132} [2024-06-03 19:40:45,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-03 19:40:45,800 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 132 transitions, 1178 flow [2024-06-03 19:40:45,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:45,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:45,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:45,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:40:45,800 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)] === [2024-06-03 19:40:45,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:45,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1783215484, now seen corresponding path program 3 times [2024-06-03 19:40:45,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:45,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171547573] [2024-06-03 19:40:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:45,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:46,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171547573] [2024-06-03 19:40:46,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171547573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:46,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:46,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:46,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223986169] [2024-06-03 19:40:46,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:46,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:46,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:46,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:47,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:47,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 132 transitions, 1178 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:47,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:47,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:47,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:47,719 INFO L124 PetriNetUnfolderBase]: 2002/3292 cut-off events. [2024-06-03 19:40:47,720 INFO L125 PetriNetUnfolderBase]: For 90549/90551 co-relation queries the response was YES. [2024-06-03 19:40:47,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19603 conditions, 3292 events. 2002/3292 cut-off events. For 90549/90551 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18913 event pairs, 409 based on Foata normal form. 12/3302 useless extension candidates. Maximal degree in co-relation 19548. Up to 2132 conditions per place. [2024-06-03 19:40:47,741 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 102 selfloop transitions, 59 changer transitions 0/169 dead transitions. [2024-06-03 19:40:47,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 169 transitions, 1726 flow [2024-06-03 19:40:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-03 19:40:47,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-03 19:40:47,743 INFO L175 Difference]: Start difference. First operand has 125 places, 132 transitions, 1178 flow. Second operand 9 states and 185 transitions. [2024-06-03 19:40:47,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 169 transitions, 1726 flow [2024-06-03 19:40:47,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 169 transitions, 1659 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-03 19:40:47,814 INFO L231 Difference]: Finished difference. Result has 133 places, 134 transitions, 1311 flow [2024-06-03 19:40:47,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1311, PETRI_PLACES=133, PETRI_TRANSITIONS=134} [2024-06-03 19:40:47,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-03 19:40:47,815 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 134 transitions, 1311 flow [2024-06-03 19:40:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:47,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:47,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:47,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:40:47,816 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)] === [2024-06-03 19:40:47,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1183544220, now seen corresponding path program 4 times [2024-06-03 19:40:47,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:47,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873609793] [2024-06-03 19:40:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:47,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:48,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:48,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873609793] [2024-06-03 19:40:48,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873609793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:48,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:48,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:48,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748508539] [2024-06-03 19:40:48,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:48,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:48,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:48,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:48,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:49,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:49,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 134 transitions, 1311 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:49,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:49,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:49,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:49,914 INFO L124 PetriNetUnfolderBase]: 1982/3260 cut-off events. [2024-06-03 19:40:49,915 INFO L125 PetriNetUnfolderBase]: For 91631/91633 co-relation queries the response was YES. [2024-06-03 19:40:49,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19218 conditions, 3260 events. 1982/3260 cut-off events. For 91631/91633 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18671 event pairs, 537 based on Foata normal form. 12/3270 useless extension candidates. Maximal degree in co-relation 19160. Up to 2686 conditions per place. [2024-06-03 19:40:49,938 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 111 selfloop transitions, 47 changer transitions 0/166 dead transitions. [2024-06-03 19:40:49,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 166 transitions, 1699 flow [2024-06-03 19:40:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-03 19:40:49,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-03 19:40:49,940 INFO L175 Difference]: Start difference. First operand has 133 places, 134 transitions, 1311 flow. Second operand 9 states and 184 transitions. [2024-06-03 19:40:49,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 166 transitions, 1699 flow [2024-06-03 19:40:50,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1575 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:50,013 INFO L231 Difference]: Finished difference. Result has 135 places, 133 transitions, 1241 flow [2024-06-03 19:40:50,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1241, PETRI_PLACES=135, PETRI_TRANSITIONS=133} [2024-06-03 19:40:50,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-03 19:40:50,014 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 133 transitions, 1241 flow [2024-06-03 19:40:50,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:50,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:50,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:50,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:40:50,015 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:50,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:50,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1460472021, now seen corresponding path program 2 times [2024-06-03 19:40:50,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:50,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447637456] [2024-06-03 19:40:50,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:50,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:51,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:51,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447637456] [2024-06-03 19:40:51,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447637456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:51,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:51,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:51,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607171845] [2024-06-03 19:40:51,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:51,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:51,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:51,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:51,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:51,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 133 transitions, 1241 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:51,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:51,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:51,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:51,666 INFO L124 PetriNetUnfolderBase]: 1906/3148 cut-off events. [2024-06-03 19:40:51,666 INFO L125 PetriNetUnfolderBase]: For 91129/91135 co-relation queries the response was YES. [2024-06-03 19:40:51,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18646 conditions, 3148 events. 1906/3148 cut-off events. For 91129/91135 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18134 event pairs, 550 based on Foata normal form. 6/3128 useless extension candidates. Maximal degree in co-relation 18587. Up to 2883 conditions per place. [2024-06-03 19:40:51,687 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 103 selfloop transitions, 30 changer transitions 0/149 dead transitions. [2024-06-03 19:40:51,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 149 transitions, 1671 flow [2024-06-03 19:40:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 19:40:51,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-03 19:40:51,688 INFO L175 Difference]: Start difference. First operand has 135 places, 133 transitions, 1241 flow. Second operand 7 states and 130 transitions. [2024-06-03 19:40:51,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 149 transitions, 1671 flow [2024-06-03 19:40:51,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 149 transitions, 1506 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-03 19:40:51,769 INFO L231 Difference]: Finished difference. Result has 133 places, 139 transitions, 1228 flow [2024-06-03 19:40:51,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1228, PETRI_PLACES=133, PETRI_TRANSITIONS=139} [2024-06-03 19:40:51,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-03 19:40:51,769 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 139 transitions, 1228 flow [2024-06-03 19:40:51,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:51,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:51,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:51,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:40:51,770 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)] === [2024-06-03 19:40:51,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:51,771 INFO L85 PathProgramCache]: Analyzing trace with hash 261023851, now seen corresponding path program 3 times [2024-06-03 19:40:51,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:51,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142635889] [2024-06-03 19:40:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:52,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:52,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142635889] [2024-06-03 19:40:52,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142635889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:52,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:52,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:52,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382057938] [2024-06-03 19:40:52,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:52,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:52,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:52,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:52,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 139 transitions, 1228 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:52,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:52,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:52,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:53,194 INFO L124 PetriNetUnfolderBase]: 1902/3141 cut-off events. [2024-06-03 19:40:53,194 INFO L125 PetriNetUnfolderBase]: For 94464/94470 co-relation queries the response was YES. [2024-06-03 19:40:53,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18606 conditions, 3141 events. 1902/3141 cut-off events. For 94464/94470 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18090 event pairs, 549 based on Foata normal form. 5/3121 useless extension candidates. Maximal degree in co-relation 18549. Up to 2880 conditions per place. [2024-06-03 19:40:53,215 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 103 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2024-06-03 19:40:53,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 148 transitions, 1514 flow [2024-06-03 19:40:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 19:40:53,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-03 19:40:53,216 INFO L175 Difference]: Start difference. First operand has 133 places, 139 transitions, 1228 flow. Second operand 7 states and 130 transitions. [2024-06-03 19:40:53,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 148 transitions, 1514 flow [2024-06-03 19:40:53,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 148 transitions, 1434 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:53,308 INFO L231 Difference]: Finished difference. Result has 137 places, 139 transitions, 1212 flow [2024-06-03 19:40:53,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1212, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2024-06-03 19:40:53,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-03 19:40:53,308 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1212 flow [2024-06-03 19:40:53,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:53,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:53,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:53,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:40:53,309 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:53,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:53,309 INFO L85 PathProgramCache]: Analyzing trace with hash 83956687, now seen corresponding path program 1 times [2024-06-03 19:40:53,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:53,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467585332] [2024-06-03 19:40:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:53,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:54,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:54,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467585332] [2024-06-03 19:40:54,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467585332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:54,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:54,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:54,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978796077] [2024-06-03 19:40:54,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:54,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:54,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:54,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:54,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:40:54,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1212 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:54,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:54,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:40:54,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:55,104 INFO L124 PetriNetUnfolderBase]: 1816/3072 cut-off events. [2024-06-03 19:40:55,104 INFO L125 PetriNetUnfolderBase]: For 85078/85078 co-relation queries the response was YES. [2024-06-03 19:40:55,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17612 conditions, 3072 events. 1816/3072 cut-off events. For 85078/85078 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17984 event pairs, 480 based on Foata normal form. 1/3072 useless extension candidates. Maximal degree in co-relation 17553. Up to 2769 conditions per place. [2024-06-03 19:40:55,126 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 131 selfloop transitions, 15 changer transitions 0/157 dead transitions. [2024-06-03 19:40:55,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 157 transitions, 1586 flow [2024-06-03 19:40:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:40:55,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-03 19:40:55,127 INFO L175 Difference]: Start difference. First operand has 137 places, 139 transitions, 1212 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:40:55,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 157 transitions, 1586 flow [2024-06-03 19:40:55,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 157 transitions, 1510 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:55,229 INFO L231 Difference]: Finished difference. Result has 138 places, 142 transitions, 1222 flow [2024-06-03 19:40:55,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1222, PETRI_PLACES=138, PETRI_TRANSITIONS=142} [2024-06-03 19:40:55,230 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-03 19:40:55,230 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 142 transitions, 1222 flow [2024-06-03 19:40:55,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:55,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:55,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:55,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:40:55,230 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:55,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:55,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1467132309, now seen corresponding path program 1 times [2024-06-03 19:40:55,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:55,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033673255] [2024-06-03 19:40:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:55,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:56,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:56,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033673255] [2024-06-03 19:40:56,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033673255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:56,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:56,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:56,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268474770] [2024-06-03 19:40:56,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:56,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:56,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:56,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:56,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 142 transitions, 1222 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:56,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:56,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:56,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:56,791 INFO L124 PetriNetUnfolderBase]: 1903/3163 cut-off events. [2024-06-03 19:40:56,791 INFO L125 PetriNetUnfolderBase]: For 90531/90531 co-relation queries the response was YES. [2024-06-03 19:40:56,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18438 conditions, 3163 events. 1903/3163 cut-off events. For 90531/90531 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18221 event pairs, 503 based on Foata normal form. 2/3164 useless extension candidates. Maximal degree in co-relation 18378. Up to 2936 conditions per place. [2024-06-03 19:40:56,811 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 138 selfloop transitions, 15 changer transitions 0/159 dead transitions. [2024-06-03 19:40:56,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 159 transitions, 1610 flow [2024-06-03 19:40:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 19:40:56,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-03 19:40:56,813 INFO L175 Difference]: Start difference. First operand has 138 places, 142 transitions, 1222 flow. Second operand 7 states and 131 transitions. [2024-06-03 19:40:56,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 159 transitions, 1610 flow [2024-06-03 19:40:56,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 159 transitions, 1546 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:56,896 INFO L231 Difference]: Finished difference. Result has 140 places, 145 transitions, 1244 flow [2024-06-03 19:40:56,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1244, PETRI_PLACES=140, PETRI_TRANSITIONS=145} [2024-06-03 19:40:56,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-03 19:40:56,897 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 145 transitions, 1244 flow [2024-06-03 19:40:56,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:56,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:56,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:56,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:40:56,897 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:56,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:56,897 INFO L85 PathProgramCache]: Analyzing trace with hash 261445513, now seen corresponding path program 2 times [2024-06-03 19:40:56,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:56,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411180652] [2024-06-03 19:40:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:56,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:57,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:57,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411180652] [2024-06-03 19:40:57,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411180652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:57,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:57,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:57,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785613350] [2024-06-03 19:40:57,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:57,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:57,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:57,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:57,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:57,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 145 transitions, 1244 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:57,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:57,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:57,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:58,378 INFO L124 PetriNetUnfolderBase]: 1921/3191 cut-off events. [2024-06-03 19:40:58,378 INFO L125 PetriNetUnfolderBase]: For 96496/96498 co-relation queries the response was YES. [2024-06-03 19:40:58,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19091 conditions, 3191 events. 1921/3191 cut-off events. For 96496/96498 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18406 event pairs, 507 based on Foata normal form. 4/3194 useless extension candidates. Maximal degree in co-relation 19030. Up to 2932 conditions per place. [2024-06-03 19:40:58,401 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 130 selfloop transitions, 28 changer transitions 0/164 dead transitions. [2024-06-03 19:40:58,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 164 transitions, 1764 flow [2024-06-03 19:40:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:40:58,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:40:58,402 INFO L175 Difference]: Start difference. First operand has 140 places, 145 transitions, 1244 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:40:58,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 164 transitions, 1764 flow [2024-06-03 19:40:58,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 164 transitions, 1700 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:58,495 INFO L231 Difference]: Finished difference. Result has 142 places, 151 transitions, 1348 flow [2024-06-03 19:40:58,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1348, PETRI_PLACES=142, PETRI_TRANSITIONS=151} [2024-06-03 19:40:58,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-03 19:40:58,495 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 151 transitions, 1348 flow [2024-06-03 19:40:58,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:58,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:58,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:58,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:40:58,496 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)] === [2024-06-03 19:40:58,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1460703219, now seen corresponding path program 3 times [2024-06-03 19:40:58,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:58,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264111853] [2024-06-03 19:40:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:58,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:59,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:59,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264111853] [2024-06-03 19:40:59,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264111853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:59,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:59,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:59,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313906334] [2024-06-03 19:40:59,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:59,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:59,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:59,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:59,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 151 transitions, 1348 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:59,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:59,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:59,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:59,995 INFO L124 PetriNetUnfolderBase]: 1915/3183 cut-off events. [2024-06-03 19:40:59,995 INFO L125 PetriNetUnfolderBase]: For 101851/101853 co-relation queries the response was YES. [2024-06-03 19:41:00,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19400 conditions, 3183 events. 1915/3183 cut-off events. For 101851/101853 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18357 event pairs, 509 based on Foata normal form. 4/3186 useless extension candidates. Maximal degree in co-relation 19338. Up to 2927 conditions per place. [2024-06-03 19:41:00,014 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 130 selfloop transitions, 27 changer transitions 0/163 dead transitions. [2024-06-03 19:41:00,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 163 transitions, 1696 flow [2024-06-03 19:41:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:41:00,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:41:00,016 INFO L175 Difference]: Start difference. First operand has 142 places, 151 transitions, 1348 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:41:00,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 163 transitions, 1696 flow [2024-06-03 19:41:00,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 163 transitions, 1601 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:00,103 INFO L231 Difference]: Finished difference. Result has 146 places, 151 transitions, 1313 flow [2024-06-03 19:41:00,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1313, PETRI_PLACES=146, PETRI_TRANSITIONS=151} [2024-06-03 19:41:00,103 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-03 19:41:00,103 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 151 transitions, 1313 flow [2024-06-03 19:41:00,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:00,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:00,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:00,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:41:00,104 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:00,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash -845743800, now seen corresponding path program 1 times [2024-06-03 19:41:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:00,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339751020] [2024-06-03 19:41:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:00,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:00,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:00,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339751020] [2024-06-03 19:41:00,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339751020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:00,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:00,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:00,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6337497] [2024-06-03 19:41:00,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:00,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:00,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:00,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:00,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:00,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:00,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 151 transitions, 1313 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:00,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:00,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:00,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:01,573 INFO L124 PetriNetUnfolderBase]: 2023/3321 cut-off events. [2024-06-03 19:41:01,573 INFO L125 PetriNetUnfolderBase]: For 126774/126776 co-relation queries the response was YES. [2024-06-03 19:41:01,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21178 conditions, 3321 events. 2023/3321 cut-off events. For 126774/126776 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19121 event pairs, 550 based on Foata normal form. 4/3324 useless extension candidates. Maximal degree in co-relation 21114. Up to 3029 conditions per place. [2024-06-03 19:41:01,610 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 20 changer transitions 0/173 dead transitions. [2024-06-03 19:41:01,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 173 transitions, 1732 flow [2024-06-03 19:41:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:41:01,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-03 19:41:01,618 INFO L175 Difference]: Start difference. First operand has 146 places, 151 transitions, 1313 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:41:01,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 173 transitions, 1732 flow [2024-06-03 19:41:01,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 173 transitions, 1658 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:01,811 INFO L231 Difference]: Finished difference. Result has 147 places, 154 transitions, 1335 flow [2024-06-03 19:41:01,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1335, PETRI_PLACES=147, PETRI_TRANSITIONS=154} [2024-06-03 19:41:01,812 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-03 19:41:01,812 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 154 transitions, 1335 flow [2024-06-03 19:41:01,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:01,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:01,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:01,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:41:01,813 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:01,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:01,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1404546192, now seen corresponding path program 2 times [2024-06-03 19:41:01,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:01,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933585163] [2024-06-03 19:41:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:01,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:03,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:03,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933585163] [2024-06-03 19:41:03,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933585163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:03,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:03,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:03,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739672053] [2024-06-03 19:41:03,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:03,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:03,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:03,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:03,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 154 transitions, 1335 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:03,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:03,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:03,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:03,880 INFO L124 PetriNetUnfolderBase]: 2087/3421 cut-off events. [2024-06-03 19:41:03,880 INFO L125 PetriNetUnfolderBase]: For 136546/136548 co-relation queries the response was YES. [2024-06-03 19:41:03,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22345 conditions, 3421 events. 2087/3421 cut-off events. For 136546/136548 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19704 event pairs, 556 based on Foata normal form. 4/3424 useless extension candidates. Maximal degree in co-relation 22280. Up to 3088 conditions per place. [2024-06-03 19:41:03,905 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 142 selfloop transitions, 34 changer transitions 0/189 dead transitions. [2024-06-03 19:41:03,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 189 transitions, 2058 flow [2024-06-03 19:41:03,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:03,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:41:03,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:41:03,907 INFO L175 Difference]: Start difference. First operand has 147 places, 154 transitions, 1335 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:41:03,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 189 transitions, 2058 flow [2024-06-03 19:41:04,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 189 transitions, 1943 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 19:41:04,078 INFO L231 Difference]: Finished difference. Result has 153 places, 172 transitions, 1566 flow [2024-06-03 19:41:04,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=153, PETRI_TRANSITIONS=172} [2024-06-03 19:41:04,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-03 19:41:04,078 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 172 transitions, 1566 flow [2024-06-03 19:41:04,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:04,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:04,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:04,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:41:04,079 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:04,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash -840021944, now seen corresponding path program 1 times [2024-06-03 19:41:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:04,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282070168] [2024-06-03 19:41:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:04,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:05,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:05,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282070168] [2024-06-03 19:41:05,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282070168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:05,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:05,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:05,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205994445] [2024-06-03 19:41:05,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:05,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:05,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:05,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:05,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:05,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:05,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 172 transitions, 1566 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:05,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:05,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:05,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:05,766 INFO L124 PetriNetUnfolderBase]: 2006/3309 cut-off events. [2024-06-03 19:41:05,766 INFO L125 PetriNetUnfolderBase]: For 141067/141079 co-relation queries the response was YES. [2024-06-03 19:41:05,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22182 conditions, 3309 events. 2006/3309 cut-off events. For 141067/141079 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19045 event pairs, 544 based on Foata normal form. 2/3288 useless extension candidates. Maximal degree in co-relation 22114. Up to 2985 conditions per place. [2024-06-03 19:41:05,792 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 143 selfloop transitions, 24 changer transitions 0/190 dead transitions. [2024-06-03 19:41:05,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 190 transitions, 1978 flow [2024-06-03 19:41:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:41:05,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:41:05,793 INFO L175 Difference]: Start difference. First operand has 153 places, 172 transitions, 1566 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:41:05,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 190 transitions, 1978 flow [2024-06-03 19:41:05,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 190 transitions, 1920 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-03 19:41:05,915 INFO L231 Difference]: Finished difference. Result has 160 places, 175 transitions, 1608 flow [2024-06-03 19:41:05,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1608, PETRI_PLACES=160, PETRI_TRANSITIONS=175} [2024-06-03 19:41:05,915 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-03 19:41:05,915 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 175 transitions, 1608 flow [2024-06-03 19:41:05,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:05,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:05,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:05,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:41:05,916 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:05,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:05,917 INFO L85 PathProgramCache]: Analyzing trace with hash 481175928, now seen corresponding path program 3 times [2024-06-03 19:41:05,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:05,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440324399] [2024-06-03 19:41:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:05,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:06,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:06,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440324399] [2024-06-03 19:41:06,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440324399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:06,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:06,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:06,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417994359] [2024-06-03 19:41:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:06,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:06,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:06,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:06,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 175 transitions, 1608 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:06,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:06,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:06,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:07,355 INFO L124 PetriNetUnfolderBase]: 2094/3431 cut-off events. [2024-06-03 19:41:07,356 INFO L125 PetriNetUnfolderBase]: For 149815/149823 co-relation queries the response was YES. [2024-06-03 19:41:07,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23364 conditions, 3431 events. 2094/3431 cut-off events. For 149815/149823 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19652 event pairs, 551 based on Foata normal form. 4/3429 useless extension candidates. Maximal degree in co-relation 23293. Up to 3115 conditions per place. [2024-06-03 19:41:07,384 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 154 selfloop transitions, 25 changer transitions 0/192 dead transitions. [2024-06-03 19:41:07,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 192 transitions, 2019 flow [2024-06-03 19:41:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:41:07,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-03 19:41:07,385 INFO L175 Difference]: Start difference. First operand has 160 places, 175 transitions, 1608 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:41:07,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 192 transitions, 2019 flow [2024-06-03 19:41:07,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 192 transitions, 1911 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:07,535 INFO L231 Difference]: Finished difference. Result has 161 places, 176 transitions, 1569 flow [2024-06-03 19:41:07,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1569, PETRI_PLACES=161, PETRI_TRANSITIONS=176} [2024-06-03 19:41:07,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-03 19:41:07,536 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 176 transitions, 1569 flow [2024-06-03 19:41:07,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:07,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:07,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:07,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:41:07,536 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)] === [2024-06-03 19:41:07,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash -816664986, now seen corresponding path program 4 times [2024-06-03 19:41:07,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:07,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922896854] [2024-06-03 19:41:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:07,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:08,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922896854] [2024-06-03 19:41:08,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922896854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:08,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:08,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:08,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807371036] [2024-06-03 19:41:08,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:08,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:08,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:08,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:08,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:08,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:08,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 176 transitions, 1569 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:08,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:08,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:08,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:09,360 INFO L124 PetriNetUnfolderBase]: 2109/3452 cut-off events. [2024-06-03 19:41:09,360 INFO L125 PetriNetUnfolderBase]: For 157097/157105 co-relation queries the response was YES. [2024-06-03 19:41:09,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23667 conditions, 3452 events. 2109/3452 cut-off events. For 157097/157105 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19780 event pairs, 549 based on Foata normal form. 4/3445 useless extension candidates. Maximal degree in co-relation 23595. Up to 3110 conditions per place. [2024-06-03 19:41:09,388 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 144 selfloop transitions, 36 changer transitions 0/193 dead transitions. [2024-06-03 19:41:09,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 193 transitions, 2023 flow [2024-06-03 19:41:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:41:09,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-03 19:41:09,389 INFO L175 Difference]: Start difference. First operand has 161 places, 176 transitions, 1569 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:41:09,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 193 transitions, 2023 flow [2024-06-03 19:41:09,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 193 transitions, 1940 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:41:09,524 INFO L231 Difference]: Finished difference. Result has 161 places, 179 transitions, 1626 flow [2024-06-03 19:41:09,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1626, PETRI_PLACES=161, PETRI_TRANSITIONS=179} [2024-06-03 19:41:09,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-03 19:41:09,524 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 179 transitions, 1626 flow [2024-06-03 19:41:09,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:09,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:09,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:09,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:41:09,525 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)] === [2024-06-03 19:41:09,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:09,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1957114350, now seen corresponding path program 5 times [2024-06-03 19:41:09,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:09,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950420140] [2024-06-03 19:41:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:09,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:10,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:10,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950420140] [2024-06-03 19:41:10,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950420140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:10,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:10,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:10,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219749180] [2024-06-03 19:41:10,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:10,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:10,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:10,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:10,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:10,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 179 transitions, 1626 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:10,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:10,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:10,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:11,274 INFO L124 PetriNetUnfolderBase]: 2141/3507 cut-off events. [2024-06-03 19:41:11,274 INFO L125 PetriNetUnfolderBase]: For 169502/169514 co-relation queries the response was YES. [2024-06-03 19:41:11,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24707 conditions, 3507 events. 2141/3507 cut-off events. For 169502/169514 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20244 event pairs, 562 based on Foata normal form. 6/3502 useless extension candidates. Maximal degree in co-relation 24634. Up to 3107 conditions per place. [2024-06-03 19:41:11,302 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 137 selfloop transitions, 56 changer transitions 0/206 dead transitions. [2024-06-03 19:41:11,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 206 transitions, 2426 flow [2024-06-03 19:41:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 19:41:11,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-03 19:41:11,303 INFO L175 Difference]: Start difference. First operand has 161 places, 179 transitions, 1626 flow. Second operand 7 states and 136 transitions. [2024-06-03 19:41:11,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 206 transitions, 2426 flow [2024-06-03 19:41:11,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 206 transitions, 2308 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:11,440 INFO L231 Difference]: Finished difference. Result has 165 places, 191 transitions, 1887 flow [2024-06-03 19:41:11,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1887, PETRI_PLACES=165, PETRI_TRANSITIONS=191} [2024-06-03 19:41:11,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-03 19:41:11,440 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 191 transitions, 1887 flow [2024-06-03 19:41:11,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:11,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:11,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:11,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:41:11,441 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:11,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash -952451642, now seen corresponding path program 6 times [2024-06-03 19:41:11,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:11,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901731984] [2024-06-03 19:41:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:11,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:12,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:12,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901731984] [2024-06-03 19:41:12,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901731984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:12,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:12,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:12,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901344750] [2024-06-03 19:41:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:12,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:12,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:12,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:12,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:12,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 191 transitions, 1887 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:12,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:12,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:12,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:13,089 INFO L124 PetriNetUnfolderBase]: 2135/3499 cut-off events. [2024-06-03 19:41:13,089 INFO L125 PetriNetUnfolderBase]: For 177503/177515 co-relation queries the response was YES. [2024-06-03 19:41:13,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25180 conditions, 3499 events. 2135/3499 cut-off events. For 177503/177515 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20219 event pairs, 564 based on Foata normal form. 6/3494 useless extension candidates. Maximal degree in co-relation 25104. Up to 3102 conditions per place. [2024-06-03 19:41:13,116 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 59 changer transitions 0/207 dead transitions. [2024-06-03 19:41:13,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 207 transitions, 2440 flow [2024-06-03 19:41:13,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:41:13,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-03 19:41:13,117 INFO L175 Difference]: Start difference. First operand has 165 places, 191 transitions, 1887 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:41:13,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 207 transitions, 2440 flow [2024-06-03 19:41:13,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 207 transitions, 2286 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-06-03 19:41:13,337 INFO L231 Difference]: Finished difference. Result has 171 places, 194 transitions, 1936 flow [2024-06-03 19:41:13,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1936, PETRI_PLACES=171, PETRI_TRANSITIONS=194} [2024-06-03 19:41:13,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-03 19:41:13,338 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 194 transitions, 1936 flow [2024-06-03 19:41:13,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:13,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:13,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:13,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:41:13,338 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:13,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:13,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1970009296, now seen corresponding path program 2 times [2024-06-03 19:41:13,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:13,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770427687] [2024-06-03 19:41:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:13,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:14,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:14,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770427687] [2024-06-03 19:41:14,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770427687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:14,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:14,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:14,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824386451] [2024-06-03 19:41:14,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:14,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:14,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:14,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:14,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:14,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 194 transitions, 1936 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:14,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:14,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:14,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:15,112 INFO L124 PetriNetUnfolderBase]: 2050/3374 cut-off events. [2024-06-03 19:41:15,112 INFO L125 PetriNetUnfolderBase]: For 177572/177593 co-relation queries the response was YES. [2024-06-03 19:41:15,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24294 conditions, 3374 events. 2050/3374 cut-off events. For 177572/177593 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19579 event pairs, 555 based on Foata normal form. 5/3353 useless extension candidates. Maximal degree in co-relation 24215. Up to 3005 conditions per place. [2024-06-03 19:41:15,143 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 48 changer transitions 0/217 dead transitions. [2024-06-03 19:41:15,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 217 transitions, 2656 flow [2024-06-03 19:41:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:41:15,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:41:15,144 INFO L175 Difference]: Start difference. First operand has 171 places, 194 transitions, 1936 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:41:15,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 217 transitions, 2656 flow [2024-06-03 19:41:15,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 217 transitions, 2578 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:15,299 INFO L231 Difference]: Finished difference. Result has 177 places, 205 transitions, 2136 flow [2024-06-03 19:41:15,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2136, PETRI_PLACES=177, PETRI_TRANSITIONS=205} [2024-06-03 19:41:15,300 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-03 19:41:15,300 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 205 transitions, 2136 flow [2024-06-03 19:41:15,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:15,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:15,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:15,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:41:15,301 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:15,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash -484861040, now seen corresponding path program 3 times [2024-06-03 19:41:15,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:15,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563524446] [2024-06-03 19:41:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:15,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:16,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:16,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563524446] [2024-06-03 19:41:16,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563524446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:16,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:16,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:16,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701392399] [2024-06-03 19:41:16,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:16,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:16,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:16,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:16,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 205 transitions, 2136 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:16,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:16,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:16,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:17,095 INFO L124 PetriNetUnfolderBase]: 2048/3370 cut-off events. [2024-06-03 19:41:17,095 INFO L125 PetriNetUnfolderBase]: For 184880/184899 co-relation queries the response was YES. [2024-06-03 19:41:17,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24663 conditions, 3370 events. 2048/3370 cut-off events. For 184880/184899 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19518 event pairs, 554 based on Foata normal form. 14/3358 useless extension candidates. Maximal degree in co-relation 24582. Up to 3004 conditions per place. [2024-06-03 19:41:17,121 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 136 selfloop transitions, 50 changer transitions 0/216 dead transitions. [2024-06-03 19:41:17,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 216 transitions, 2622 flow [2024-06-03 19:41:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:41:17,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:41:17,123 INFO L175 Difference]: Start difference. First operand has 177 places, 205 transitions, 2136 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:41:17,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 216 transitions, 2622 flow [2024-06-03 19:41:17,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 216 transitions, 2514 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:17,300 INFO L231 Difference]: Finished difference. Result has 182 places, 205 transitions, 2134 flow [2024-06-03 19:41:17,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2134, PETRI_PLACES=182, PETRI_TRANSITIONS=205} [2024-06-03 19:41:17,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-03 19:41:17,301 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 205 transitions, 2134 flow [2024-06-03 19:41:17,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:17,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:17,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:17,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:41:17,302 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:17,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1957122286, now seen corresponding path program 4 times [2024-06-03 19:41:17,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:17,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372522470] [2024-06-03 19:41:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:17,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:18,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:18,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372522470] [2024-06-03 19:41:18,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372522470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:18,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:18,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:18,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028298954] [2024-06-03 19:41:18,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:18,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:18,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:18,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:18,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 205 transitions, 2134 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:18,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:18,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:18,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:19,003 INFO L124 PetriNetUnfolderBase]: 2044/3363 cut-off events. [2024-06-03 19:41:19,003 INFO L125 PetriNetUnfolderBase]: For 189650/189665 co-relation queries the response was YES. [2024-06-03 19:41:19,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24739 conditions, 3363 events. 2044/3363 cut-off events. For 189650/189665 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19459 event pairs, 553 based on Foata normal form. 5/3343 useless extension candidates. Maximal degree in co-relation 24656. Up to 3001 conditions per place. [2024-06-03 19:41:19,032 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 46 changer transitions 0/216 dead transitions. [2024-06-03 19:41:19,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 216 transitions, 2539 flow [2024-06-03 19:41:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:41:19,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:41:19,033 INFO L175 Difference]: Start difference. First operand has 182 places, 205 transitions, 2134 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:41:19,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 216 transitions, 2539 flow [2024-06-03 19:41:19,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 216 transitions, 2415 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:19,257 INFO L231 Difference]: Finished difference. Result has 184 places, 206 transitions, 2117 flow [2024-06-03 19:41:19,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2117, PETRI_PLACES=184, PETRI_TRANSITIONS=206} [2024-06-03 19:41:19,258 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-03 19:41:19,258 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 206 transitions, 2117 flow [2024-06-03 19:41:19,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:19,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:19,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:19,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:41:19,258 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)] === [2024-06-03 19:41:19,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:19,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1517126572, now seen corresponding path program 7 times [2024-06-03 19:41:19,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:19,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559006108] [2024-06-03 19:41:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:19,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:20,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:20,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559006108] [2024-06-03 19:41:20,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559006108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:20,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:20,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:20,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487345146] [2024-06-03 19:41:20,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:20,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:20,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:20,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:20,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:20,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:20,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 206 transitions, 2117 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:20,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:20,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:20,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:20,846 INFO L124 PetriNetUnfolderBase]: 2187/3578 cut-off events. [2024-06-03 19:41:20,846 INFO L125 PetriNetUnfolderBase]: For 197945/197947 co-relation queries the response was YES. [2024-06-03 19:41:20,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26128 conditions, 3578 events. 2187/3578 cut-off events. For 197945/197947 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20607 event pairs, 554 based on Foata normal form. 4/3573 useless extension candidates. Maximal degree in co-relation 26044. Up to 3209 conditions per place. [2024-06-03 19:41:20,877 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 182 selfloop transitions, 53 changer transitions 0/248 dead transitions. [2024-06-03 19:41:20,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 248 transitions, 2920 flow [2024-06-03 19:41:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:41:20,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-03 19:41:20,879 INFO L175 Difference]: Start difference. First operand has 184 places, 206 transitions, 2117 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:41:20,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 248 transitions, 2920 flow [2024-06-03 19:41:21,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 248 transitions, 2802 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:21,141 INFO L231 Difference]: Finished difference. Result has 189 places, 227 transitions, 2439 flow [2024-06-03 19:41:21,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2439, PETRI_PLACES=189, PETRI_TRANSITIONS=227} [2024-06-03 19:41:21,142 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-03 19:41:21,142 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 227 transitions, 2439 flow [2024-06-03 19:41:21,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:21,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:21,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:21,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:41:21,146 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)] === [2024-06-03 19:41:21,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:21,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1579744973, now seen corresponding path program 1 times [2024-06-03 19:41:21,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:21,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866078187] [2024-06-03 19:41:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:21,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:22,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:22,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866078187] [2024-06-03 19:41:22,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866078187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:22,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:22,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:22,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939764677] [2024-06-03 19:41:22,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:22,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:22,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:22,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:22,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 227 transitions, 2439 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:22,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:22,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:22,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:23,136 INFO L124 PetriNetUnfolderBase]: 2174/3565 cut-off events. [2024-06-03 19:41:23,136 INFO L125 PetriNetUnfolderBase]: For 202023/202023 co-relation queries the response was YES. [2024-06-03 19:41:23,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26249 conditions, 3565 events. 2174/3565 cut-off events. For 202023/202023 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20562 event pairs, 562 based on Foata normal form. 1/3565 useless extension candidates. Maximal degree in co-relation 26162. Up to 3277 conditions per place. [2024-06-03 19:41:23,169 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 18 changer transitions 0/246 dead transitions. [2024-06-03 19:41:23,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 246 transitions, 3017 flow [2024-06-03 19:41:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:41:23,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:41:23,170 INFO L175 Difference]: Start difference. First operand has 189 places, 227 transitions, 2439 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:41:23,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 246 transitions, 3017 flow [2024-06-03 19:41:23,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 246 transitions, 2889 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:23,476 INFO L231 Difference]: Finished difference. Result has 191 places, 230 transitions, 2421 flow [2024-06-03 19:41:23,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2421, PETRI_PLACES=191, PETRI_TRANSITIONS=230} [2024-06-03 19:41:23,477 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-03 19:41:23,477 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 230 transitions, 2421 flow [2024-06-03 19:41:23,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:23,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:23,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:23,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:41:23,477 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)] === [2024-06-03 19:41:23,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:23,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1688583472, now seen corresponding path program 1 times [2024-06-03 19:41:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:23,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44431392] [2024-06-03 19:41:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:23,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:24,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:24,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44431392] [2024-06-03 19:41:24,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44431392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:24,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:24,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:24,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396659468] [2024-06-03 19:41:24,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:24,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:24,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:24,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:24,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:24,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:24,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 230 transitions, 2421 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:24,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:24,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:24,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:25,221 INFO L124 PetriNetUnfolderBase]: 2184/3585 cut-off events. [2024-06-03 19:41:25,221 INFO L125 PetriNetUnfolderBase]: For 214260/214260 co-relation queries the response was YES. [2024-06-03 19:41:25,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26716 conditions, 3585 events. 2184/3585 cut-off events. For 214260/214260 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20730 event pairs, 557 based on Foata normal form. 4/3588 useless extension candidates. Maximal degree in co-relation 26629. Up to 3284 conditions per place. [2024-06-03 19:41:25,254 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 220 selfloop transitions, 18 changer transitions 0/249 dead transitions. [2024-06-03 19:41:25,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 249 transitions, 3003 flow [2024-06-03 19:41:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:41:25,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:41:25,256 INFO L175 Difference]: Start difference. First operand has 191 places, 230 transitions, 2421 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:41:25,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 249 transitions, 3003 flow [2024-06-03 19:41:25,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 249 transitions, 2915 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:25,592 INFO L231 Difference]: Finished difference. Result has 193 places, 233 transitions, 2439 flow [2024-06-03 19:41:25,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2439, PETRI_PLACES=193, PETRI_TRANSITIONS=233} [2024-06-03 19:41:25,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-03 19:41:25,592 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 233 transitions, 2439 flow [2024-06-03 19:41:25,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:25,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:25,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:25,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:41:25,593 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)] === [2024-06-03 19:41:25,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash -485121998, now seen corresponding path program 2 times [2024-06-03 19:41:25,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:25,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536622236] [2024-06-03 19:41:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:26,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536622236] [2024-06-03 19:41:26,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536622236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:26,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:26,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:26,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213798615] [2024-06-03 19:41:26,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:26,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:26,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:26,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:26,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:26,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:26,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 233 transitions, 2439 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:26,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:26,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:26,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:27,430 INFO L124 PetriNetUnfolderBase]: 2225/3655 cut-off events. [2024-06-03 19:41:27,431 INFO L125 PetriNetUnfolderBase]: For 231990/231992 co-relation queries the response was YES. [2024-06-03 19:41:27,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27946 conditions, 3655 events. 2225/3655 cut-off events. For 231990/231992 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21275 event pairs, 562 based on Foata normal form. 6/3657 useless extension candidates. Maximal degree in co-relation 27858. Up to 3273 conditions per place. [2024-06-03 19:41:27,469 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 205 selfloop transitions, 42 changer transitions 0/258 dead transitions. [2024-06-03 19:41:27,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 258 transitions, 3367 flow [2024-06-03 19:41:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:41:27,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:41:27,471 INFO L175 Difference]: Start difference. First operand has 193 places, 233 transitions, 2439 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:41:27,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 258 transitions, 3367 flow [2024-06-03 19:41:27,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 258 transitions, 3283 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:27,887 INFO L231 Difference]: Finished difference. Result has 195 places, 242 transitions, 2643 flow [2024-06-03 19:41:27,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2643, PETRI_PLACES=195, PETRI_TRANSITIONS=242} [2024-06-03 19:41:27,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-03 19:41:27,888 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 242 transitions, 2643 flow [2024-06-03 19:41:27,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:27,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:27,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:27,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:41:27,888 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)] === [2024-06-03 19:41:27,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1970460718, now seen corresponding path program 3 times [2024-06-03 19:41:27,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:27,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208707644] [2024-06-03 19:41:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:27,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:28,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:28,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208707644] [2024-06-03 19:41:28,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208707644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:28,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:28,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:28,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692272046] [2024-06-03 19:41:28,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:28,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:28,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:28,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:28,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:29,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:29,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 242 transitions, 2643 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:29,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:29,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:29,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:29,761 INFO L124 PetriNetUnfolderBase]: 2215/3641 cut-off events. [2024-06-03 19:41:29,761 INFO L125 PetriNetUnfolderBase]: For 237662/237664 co-relation queries the response was YES. [2024-06-03 19:41:29,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28140 conditions, 3641 events. 2215/3641 cut-off events. For 237662/237664 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21202 event pairs, 558 based on Foata normal form. 5/3645 useless extension candidates. Maximal degree in co-relation 28051. Up to 3267 conditions per place. [2024-06-03 19:41:29,800 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 202 selfloop transitions, 44 changer transitions 0/257 dead transitions. [2024-06-03 19:41:29,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 257 transitions, 3279 flow [2024-06-03 19:41:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:41:29,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:41:29,801 INFO L175 Difference]: Start difference. First operand has 195 places, 242 transitions, 2643 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:41:29,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 257 transitions, 3279 flow [2024-06-03 19:41:30,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 257 transitions, 3142 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:30,115 INFO L231 Difference]: Finished difference. Result has 200 places, 242 transitions, 2601 flow [2024-06-03 19:41:30,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2601, PETRI_PLACES=200, PETRI_TRANSITIONS=242} [2024-06-03 19:41:30,116 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-03 19:41:30,116 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 242 transitions, 2601 flow [2024-06-03 19:41:30,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:30,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:30,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:30,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:41:30,117 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)] === [2024-06-03 19:41:30,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:30,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1962842158, now seen corresponding path program 4 times [2024-06-03 19:41:30,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:30,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816002721] [2024-06-03 19:41:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:30,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:31,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816002721] [2024-06-03 19:41:31,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816002721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:31,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:31,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:31,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860614973] [2024-06-03 19:41:31,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:31,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:31,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:31,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:31,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:31,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:31,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 242 transitions, 2601 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:31,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:31,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:31,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:32,008 INFO L124 PetriNetUnfolderBase]: 2203/3625 cut-off events. [2024-06-03 19:41:32,008 INFO L125 PetriNetUnfolderBase]: For 239547/239549 co-relation queries the response was YES. [2024-06-03 19:41:32,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27932 conditions, 3625 events. 2203/3625 cut-off events. For 239547/239549 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21115 event pairs, 562 based on Foata normal form. 6/3628 useless extension candidates. Maximal degree in co-relation 27841. Up to 3259 conditions per place. [2024-06-03 19:41:32,044 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 204 selfloop transitions, 41 changer transitions 0/256 dead transitions. [2024-06-03 19:41:32,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 256 transitions, 3133 flow [2024-06-03 19:41:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:41:32,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:41:32,045 INFO L175 Difference]: Start difference. First operand has 200 places, 242 transitions, 2601 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:41:32,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 256 transitions, 3133 flow [2024-06-03 19:41:32,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 256 transitions, 3013 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:32,384 INFO L231 Difference]: Finished difference. Result has 202 places, 242 transitions, 2569 flow [2024-06-03 19:41:32,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2569, PETRI_PLACES=202, PETRI_TRANSITIONS=242} [2024-06-03 19:41:32,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-03 19:41:32,385 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 242 transitions, 2569 flow [2024-06-03 19:41:32,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:32,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:32,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:32,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:41:32,386 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:32,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:32,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1970470638, now seen corresponding path program 1 times [2024-06-03 19:41:32,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:32,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540325627] [2024-06-03 19:41:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:32,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:33,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:33,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540325627] [2024-06-03 19:41:33,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540325627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:33,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:33,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:41:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530202549] [2024-06-03 19:41:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:41:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:41:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:41:33,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:33,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 242 transitions, 2569 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:33,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:33,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:33,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:34,480 INFO L124 PetriNetUnfolderBase]: 2137/3525 cut-off events. [2024-06-03 19:41:34,480 INFO L125 PetriNetUnfolderBase]: For 241835/241839 co-relation queries the response was YES. [2024-06-03 19:41:34,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27351 conditions, 3525 events. 2137/3525 cut-off events. For 241835/241839 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20614 event pairs, 573 based on Foata normal form. 1/3504 useless extension candidates. Maximal degree in co-relation 27259. Up to 3204 conditions per place. [2024-06-03 19:41:34,515 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 21 changer transitions 0/256 dead transitions. [2024-06-03 19:41:34,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 256 transitions, 3093 flow [2024-06-03 19:41:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:34,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:41:34,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-03 19:41:34,517 INFO L175 Difference]: Start difference. First operand has 202 places, 242 transitions, 2569 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:41:34,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 256 transitions, 3093 flow [2024-06-03 19:41:34,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 256 transitions, 2967 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 19:41:34,938 INFO L231 Difference]: Finished difference. Result has 203 places, 245 transitions, 2555 flow [2024-06-03 19:41:34,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2555, PETRI_PLACES=203, PETRI_TRANSITIONS=245} [2024-06-03 19:41:34,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-03 19:41:34,939 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 245 transitions, 2555 flow [2024-06-03 19:41:34,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:34,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:34,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:34,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:41:34,940 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:34,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:34,941 INFO L85 PathProgramCache]: Analyzing trace with hash 298539060, now seen corresponding path program 1 times [2024-06-03 19:41:34,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:34,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301670450] [2024-06-03 19:41:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:34,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:35,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:35,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301670450] [2024-06-03 19:41:35,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301670450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:35,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:35,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:35,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411816267] [2024-06-03 19:41:35,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:35,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:35,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:35,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:36,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:36,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 245 transitions, 2555 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:36,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:36,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:36,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:36,884 INFO L124 PetriNetUnfolderBase]: 2248/3670 cut-off events. [2024-06-03 19:41:36,884 INFO L125 PetriNetUnfolderBase]: For 253856/253856 co-relation queries the response was YES. [2024-06-03 19:41:36,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28676 conditions, 3670 events. 2248/3670 cut-off events. For 253856/253856 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21269 event pairs, 549 based on Foata normal form. 2/3663 useless extension candidates. Maximal degree in co-relation 28583. Up to 3337 conditions per place. [2024-06-03 19:41:36,921 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 236 selfloop transitions, 24 changer transitions 0/274 dead transitions. [2024-06-03 19:41:36,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 274 transitions, 3232 flow [2024-06-03 19:41:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:41:36,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-03 19:41:36,923 INFO L175 Difference]: Start difference. First operand has 203 places, 245 transitions, 2555 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:41:36,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 274 transitions, 3232 flow [2024-06-03 19:41:37,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 274 transitions, 3056 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-03 19:41:37,398 INFO L231 Difference]: Finished difference. Result has 202 places, 249 transitions, 2525 flow [2024-06-03 19:41:37,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2525, PETRI_PLACES=202, PETRI_TRANSITIONS=249} [2024-06-03 19:41:37,398 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-03 19:41:37,398 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 249 transitions, 2525 flow [2024-06-03 19:41:37,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:37,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:37,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:37,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:41:37,399 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:37,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:37,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1918118432, now seen corresponding path program 2 times [2024-06-03 19:41:37,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:37,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307748279] [2024-06-03 19:41:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:37,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:38,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:38,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307748279] [2024-06-03 19:41:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307748279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:38,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:38,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:41:38,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804483768] [2024-06-03 19:41:38,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:38,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:41:38,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:41:38,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:41:38,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:38,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 249 transitions, 2525 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:38,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:38,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:38,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:39,411 INFO L124 PetriNetUnfolderBase]: 2296/3745 cut-off events. [2024-06-03 19:41:39,411 INFO L125 PetriNetUnfolderBase]: For 266545/266545 co-relation queries the response was YES. [2024-06-03 19:41:39,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29736 conditions, 3745 events. 2296/3745 cut-off events. For 266545/266545 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21710 event pairs, 591 based on Foata normal form. 2/3734 useless extension candidates. Maximal degree in co-relation 29642. Up to 3392 conditions per place. [2024-06-03 19:41:39,448 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 241 selfloop transitions, 34 changer transitions 0/289 dead transitions. [2024-06-03 19:41:39,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 289 transitions, 3423 flow [2024-06-03 19:41:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:41:39,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:41:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-03 19:41:39,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-03 19:41:39,449 INFO L175 Difference]: Start difference. First operand has 202 places, 249 transitions, 2525 flow. Second operand 10 states and 186 transitions. [2024-06-03 19:41:39,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 289 transitions, 3423 flow [2024-06-03 19:41:40,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 289 transitions, 3235 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:40,014 INFO L231 Difference]: Finished difference. Result has 209 places, 265 transitions, 2720 flow [2024-06-03 19:41:40,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2720, PETRI_PLACES=209, PETRI_TRANSITIONS=265} [2024-06-03 19:41:40,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-03 19:41:40,014 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 265 transitions, 2720 flow [2024-06-03 19:41:40,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:40,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:40,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:40,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:41:40,015 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)] === [2024-06-03 19:41:40,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash -448551266, now seen corresponding path program 3 times [2024-06-03 19:41:40,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:40,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152265098] [2024-06-03 19:41:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:40,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:40,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:40,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152265098] [2024-06-03 19:41:40,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152265098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:40,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:40,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222830655] [2024-06-03 19:41:40,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:40,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:40,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:40,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:40,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 265 transitions, 2720 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:40,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:40,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:40,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:41,770 INFO L124 PetriNetUnfolderBase]: 2306/3764 cut-off events. [2024-06-03 19:41:41,771 INFO L125 PetriNetUnfolderBase]: For 278628/278630 co-relation queries the response was YES. [2024-06-03 19:41:41,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30318 conditions, 3764 events. 2306/3764 cut-off events. For 278628/278630 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21880 event pairs, 591 based on Foata normal form. 4/3755 useless extension candidates. Maximal degree in co-relation 30221. Up to 3334 conditions per place. [2024-06-03 19:41:41,811 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 229 selfloop transitions, 48 changer transitions 0/291 dead transitions. [2024-06-03 19:41:41,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 291 transitions, 3429 flow [2024-06-03 19:41:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:41,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:41:41,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-03 19:41:41,813 INFO L175 Difference]: Start difference. First operand has 209 places, 265 transitions, 2720 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:41:41,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 291 transitions, 3429 flow [2024-06-03 19:41:42,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 291 transitions, 3303 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-03 19:41:42,453 INFO L231 Difference]: Finished difference. Result has 213 places, 268 transitions, 2786 flow [2024-06-03 19:41:42,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2786, PETRI_PLACES=213, PETRI_TRANSITIONS=268} [2024-06-03 19:41:42,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-03 19:41:42,454 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 268 transitions, 2786 flow [2024-06-03 19:41:42,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:42,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:42,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:42,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:41:42,455 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)] === [2024-06-03 19:41:42,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1250402278, now seen corresponding path program 1 times [2024-06-03 19:41:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:42,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957421578] [2024-06-03 19:41:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:42,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:43,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:43,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957421578] [2024-06-03 19:41:43,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957421578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:43,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:43,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:43,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138862914] [2024-06-03 19:41:43,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:43,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:43,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:43,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:43,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:43,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 268 transitions, 2786 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:43,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:43,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:43,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:44,745 INFO L124 PetriNetUnfolderBase]: 2311/3771 cut-off events. [2024-06-03 19:41:44,745 INFO L125 PetriNetUnfolderBase]: For 289595/289595 co-relation queries the response was YES. [2024-06-03 19:41:44,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30953 conditions, 3771 events. 2311/3771 cut-off events. For 289595/289595 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21926 event pairs, 562 based on Foata normal form. 1/3758 useless extension candidates. Maximal degree in co-relation 30855. Up to 3373 conditions per place. [2024-06-03 19:41:44,779 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 235 selfloop transitions, 44 changer transitions 0/293 dead transitions. [2024-06-03 19:41:44,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 293 transitions, 3491 flow [2024-06-03 19:41:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:41:44,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-03 19:41:44,780 INFO L175 Difference]: Start difference. First operand has 213 places, 268 transitions, 2786 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:41:44,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 293 transitions, 3491 flow [2024-06-03 19:41:45,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 293 transitions, 3318 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:45,153 INFO L231 Difference]: Finished difference. Result has 215 places, 271 transitions, 2793 flow [2024-06-03 19:41:45,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2793, PETRI_PLACES=215, PETRI_TRANSITIONS=271} [2024-06-03 19:41:45,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-03 19:41:45,154 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 271 transitions, 2793 flow [2024-06-03 19:41:45,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:45,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:45,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:45,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:41:45,154 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)] === [2024-06-03 19:41:45,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1216160778, now seen corresponding path program 1 times [2024-06-03 19:41:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:45,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743971475] [2024-06-03 19:41:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:45,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:46,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:46,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743971475] [2024-06-03 19:41:46,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743971475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:46,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:46,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979766737] [2024-06-03 19:41:46,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:46,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:46,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:46,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:46,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 271 transitions, 2793 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:46,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:46,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:46,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:46,999 INFO L124 PetriNetUnfolderBase]: 2403/3875 cut-off events. [2024-06-03 19:41:47,000 INFO L125 PetriNetUnfolderBase]: For 301087/301091 co-relation queries the response was YES. [2024-06-03 19:41:47,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31802 conditions, 3875 events. 2403/3875 cut-off events. For 301087/301091 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22181 event pairs, 586 based on Foata normal form. 6/3880 useless extension candidates. Maximal degree in co-relation 31704. Up to 3583 conditions per place. [2024-06-03 19:41:47,042 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 246 selfloop transitions, 41 changer transitions 0/292 dead transitions. [2024-06-03 19:41:47,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 292 transitions, 3494 flow [2024-06-03 19:41:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:41:47,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-03 19:41:47,045 INFO L175 Difference]: Start difference. First operand has 215 places, 271 transitions, 2793 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:41:47,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 292 transitions, 3494 flow [2024-06-03 19:41:47,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 292 transitions, 3336 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:47,683 INFO L231 Difference]: Finished difference. Result has 218 places, 274 transitions, 2802 flow [2024-06-03 19:41:47,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2802, PETRI_PLACES=218, PETRI_TRANSITIONS=274} [2024-06-03 19:41:47,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-03 19:41:47,683 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 274 transitions, 2802 flow [2024-06-03 19:41:47,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:47,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:47,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:47,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:41:47,684 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:47,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:47,687 INFO L85 PathProgramCache]: Analyzing trace with hash -448252736, now seen corresponding path program 4 times [2024-06-03 19:41:47,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:47,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123232361] [2024-06-03 19:41:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:47,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:48,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:48,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123232361] [2024-06-03 19:41:48,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123232361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:48,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:48,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:48,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845150846] [2024-06-03 19:41:48,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:48,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:48,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:48,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:48,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:48,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:48,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 274 transitions, 2802 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:48,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:48,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:48,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:49,572 INFO L124 PetriNetUnfolderBase]: 2344/3818 cut-off events. [2024-06-03 19:41:49,573 INFO L125 PetriNetUnfolderBase]: For 317863/317881 co-relation queries the response was YES. [2024-06-03 19:41:49,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32186 conditions, 3818 events. 2344/3818 cut-off events. For 317863/317881 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22190 event pairs, 551 based on Foata normal form. 4/3804 useless extension candidates. Maximal degree in co-relation 32087. Up to 3334 conditions per place. [2024-06-03 19:41:49,618 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 220 selfloop transitions, 63 changer transitions 0/298 dead transitions. [2024-06-03 19:41:49,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 298 transitions, 3529 flow [2024-06-03 19:41:49,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:41:49,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-03 19:41:49,620 INFO L175 Difference]: Start difference. First operand has 218 places, 274 transitions, 2802 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:41:49,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 298 transitions, 3529 flow [2024-06-03 19:41:50,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 298 transitions, 3383 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:50,249 INFO L231 Difference]: Finished difference. Result has 220 places, 277 transitions, 2892 flow [2024-06-03 19:41:50,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2892, PETRI_PLACES=220, PETRI_TRANSITIONS=277} [2024-06-03 19:41:50,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-03 19:41:50,249 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 277 transitions, 2892 flow [2024-06-03 19:41:50,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:50,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:50,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:50,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:41:50,250 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:50,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1726292936, now seen corresponding path program 2 times [2024-06-03 19:41:50,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:50,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128782328] [2024-06-03 19:41:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:50,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:51,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:51,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128782328] [2024-06-03 19:41:51,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128782328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:51,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:51,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:51,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061483009] [2024-06-03 19:41:51,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:51,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:51,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:51,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:51,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:51,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:51,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 277 transitions, 2892 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:51,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:51,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:51,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:52,371 INFO L124 PetriNetUnfolderBase]: 2455/3954 cut-off events. [2024-06-03 19:41:52,371 INFO L125 PetriNetUnfolderBase]: For 336857/336859 co-relation queries the response was YES. [2024-06-03 19:41:52,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33767 conditions, 3954 events. 2455/3954 cut-off events. For 336857/336859 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22727 event pairs, 600 based on Foata normal form. 4/3957 useless extension candidates. Maximal degree in co-relation 33667. Up to 3559 conditions per place. [2024-06-03 19:41:52,412 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 234 selfloop transitions, 69 changer transitions 0/308 dead transitions. [2024-06-03 19:41:52,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 308 transitions, 4045 flow [2024-06-03 19:41:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:41:52,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:41:52,414 INFO L175 Difference]: Start difference. First operand has 220 places, 277 transitions, 2892 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:41:52,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 308 transitions, 4045 flow [2024-06-03 19:41:53,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 308 transitions, 3835 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:53,238 INFO L231 Difference]: Finished difference. Result has 223 places, 288 transitions, 3123 flow [2024-06-03 19:41:53,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3123, PETRI_PLACES=223, PETRI_TRANSITIONS=288} [2024-06-03 19:41:53,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-03 19:41:53,239 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 288 transitions, 3123 flow [2024-06-03 19:41:53,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:53,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:53,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:53,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:41:53,240 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:53,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1928069432, now seen corresponding path program 5 times [2024-06-03 19:41:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:53,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211000685] [2024-06-03 19:41:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:53,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:54,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:54,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211000685] [2024-06-03 19:41:54,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211000685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:54,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:54,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:54,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564127135] [2024-06-03 19:41:54,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:54,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:54,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:54,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:54,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:54,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:54,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 288 transitions, 3123 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:54,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:54,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:54,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:55,118 INFO L124 PetriNetUnfolderBase]: 2424/3947 cut-off events. [2024-06-03 19:41:55,118 INFO L125 PetriNetUnfolderBase]: For 365547/365554 co-relation queries the response was YES. [2024-06-03 19:41:55,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34972 conditions, 3947 events. 2424/3947 cut-off events. For 365547/365554 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23176 event pairs, 568 based on Foata normal form. 9/3942 useless extension candidates. Maximal degree in co-relation 34870. Up to 3337 conditions per place. [2024-06-03 19:41:55,164 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 205 selfloop transitions, 93 changer transitions 0/317 dead transitions. [2024-06-03 19:41:55,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 317 transitions, 4329 flow [2024-06-03 19:41:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:41:55,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-03 19:41:55,166 INFO L175 Difference]: Start difference. First operand has 223 places, 288 transitions, 3123 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:41:55,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 317 transitions, 4329 flow [2024-06-03 19:41:55,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 317 transitions, 4191 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:56,000 INFO L231 Difference]: Finished difference. Result has 228 places, 297 transitions, 3497 flow [2024-06-03 19:41:56,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3497, PETRI_PLACES=228, PETRI_TRANSITIONS=297} [2024-06-03 19:41:56,001 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-03 19:41:56,001 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 297 transitions, 3497 flow [2024-06-03 19:41:56,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:56,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:56,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:56,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:41:56,002 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)] === [2024-06-03 19:41:56,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:56,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1726172594, now seen corresponding path program 6 times [2024-06-03 19:41:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:56,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475343475] [2024-06-03 19:41:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:56,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:57,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:57,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475343475] [2024-06-03 19:41:57,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475343475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:57,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:57,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:57,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448377388] [2024-06-03 19:41:57,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:57,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:57,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:57,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 297 transitions, 3497 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:57,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:57,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:57,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:58,015 INFO L124 PetriNetUnfolderBase]: 2438/3959 cut-off events. [2024-06-03 19:41:58,016 INFO L125 PetriNetUnfolderBase]: For 379055/379058 co-relation queries the response was YES. [2024-06-03 19:41:58,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35815 conditions, 3959 events. 2438/3959 cut-off events. For 379055/379058 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23058 event pairs, 601 based on Foata normal form. 5/3955 useless extension candidates. Maximal degree in co-relation 35711. Up to 3564 conditions per place. [2024-06-03 19:41:58,059 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 262 selfloop transitions, 39 changer transitions 0/320 dead transitions. [2024-06-03 19:41:58,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 320 transitions, 4298 flow [2024-06-03 19:41:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:41:58,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:41:58,061 INFO L175 Difference]: Start difference. First operand has 228 places, 297 transitions, 3497 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:41:58,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 320 transitions, 4298 flow [2024-06-03 19:41:58,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 320 transitions, 4120 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:58,614 INFO L231 Difference]: Finished difference. Result has 233 places, 303 transitions, 3557 flow [2024-06-03 19:41:58,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3557, PETRI_PLACES=233, PETRI_TRANSITIONS=303} [2024-06-03 19:41:58,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-03 19:41:58,614 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 303 transitions, 3557 flow [2024-06-03 19:41:58,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:58,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:58,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:58,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:41:58,615 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)] === [2024-06-03 19:41:58,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:58,615 INFO L85 PathProgramCache]: Analyzing trace with hash 418777272, now seen corresponding path program 3 times [2024-06-03 19:41:58,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:58,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546310017] [2024-06-03 19:41:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:58,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:59,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:59,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546310017] [2024-06-03 19:41:59,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546310017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:59,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:59,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:59,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844265685] [2024-06-03 19:41:59,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:59,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:59,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:59,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:59,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:59,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 303 transitions, 3557 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:59,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:59,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:59,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:00,471 INFO L124 PetriNetUnfolderBase]: 2506/4035 cut-off events. [2024-06-03 19:42:00,472 INFO L125 PetriNetUnfolderBase]: For 381408/381410 co-relation queries the response was YES. [2024-06-03 19:42:00,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36043 conditions, 4035 events. 2506/4035 cut-off events. For 381408/381410 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23236 event pairs, 599 based on Foata normal form. 4/4038 useless extension candidates. Maximal degree in co-relation 35937. Up to 3633 conditions per place. [2024-06-03 19:42:00,514 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 243 selfloop transitions, 74 changer transitions 0/322 dead transitions. [2024-06-03 19:42:00,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 322 transitions, 4371 flow [2024-06-03 19:42:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:42:00,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:42:00,515 INFO L175 Difference]: Start difference. First operand has 233 places, 303 transitions, 3557 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:42:00,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 322 transitions, 4371 flow [2024-06-03 19:42:01,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 322 transitions, 4141 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-03 19:42:01,049 INFO L231 Difference]: Finished difference. Result has 236 places, 303 transitions, 3481 flow [2024-06-03 19:42:01,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3327, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3481, PETRI_PLACES=236, PETRI_TRANSITIONS=303} [2024-06-03 19:42:01,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-03 19:42:01,050 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 303 transitions, 3481 flow [2024-06-03 19:42:01,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:01,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:01,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:01,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:42:01,051 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)] === [2024-06-03 19:42:01,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash 295679124, now seen corresponding path program 1 times [2024-06-03 19:42:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:01,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27811604] [2024-06-03 19:42:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:01,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:02,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:02,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27811604] [2024-06-03 19:42:02,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27811604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:02,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:02,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:02,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832810964] [2024-06-03 19:42:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:02,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:02,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:02,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:02,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 303 transitions, 3481 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:02,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:02,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:02,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:03,078 INFO L124 PetriNetUnfolderBase]: 2440/3949 cut-off events. [2024-06-03 19:42:03,079 INFO L125 PetriNetUnfolderBase]: For 393128/393131 co-relation queries the response was YES. [2024-06-03 19:42:03,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35907 conditions, 3949 events. 2440/3949 cut-off events. For 393128/393131 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22903 event pairs, 469 based on Foata normal form. 5/3945 useless extension candidates. Maximal degree in co-relation 35800. Up to 3554 conditions per place. [2024-06-03 19:42:03,119 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 286 selfloop transitions, 26 changer transitions 0/331 dead transitions. [2024-06-03 19:42:03,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 331 transitions, 4242 flow [2024-06-03 19:42:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:42:03,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 19:42:03,120 INFO L175 Difference]: Start difference. First operand has 236 places, 303 transitions, 3481 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:42:03,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 331 transitions, 4242 flow [2024-06-03 19:42:03,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 331 transitions, 4096 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:03,793 INFO L231 Difference]: Finished difference. Result has 238 places, 305 transitions, 3456 flow [2024-06-03 19:42:03,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3456, PETRI_PLACES=238, PETRI_TRANSITIONS=305} [2024-06-03 19:42:03,794 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-03 19:42:03,794 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 305 transitions, 3456 flow [2024-06-03 19:42:03,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:03,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:03,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:03,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:42:03,795 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)] === [2024-06-03 19:42:03,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:03,795 INFO L85 PathProgramCache]: Analyzing trace with hash 304250004, now seen corresponding path program 2 times [2024-06-03 19:42:03,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:03,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213898162] [2024-06-03 19:42:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:03,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:04,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:04,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213898162] [2024-06-03 19:42:04,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213898162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:04,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:04,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:04,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889324454] [2024-06-03 19:42:04,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:04,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:04,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:04,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:04,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:04,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 305 transitions, 3456 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:04,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:04,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:04,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:05,724 INFO L124 PetriNetUnfolderBase]: 2448/3976 cut-off events. [2024-06-03 19:42:05,724 INFO L125 PetriNetUnfolderBase]: For 403729/403732 co-relation queries the response was YES. [2024-06-03 19:42:05,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36245 conditions, 3976 events. 2448/3976 cut-off events. For 403729/403732 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23246 event pairs, 563 based on Foata normal form. 5/3972 useless extension candidates. Maximal degree in co-relation 36137. Up to 3596 conditions per place. [2024-06-03 19:42:05,765 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 280 selfloop transitions, 30 changer transitions 0/329 dead transitions. [2024-06-03 19:42:05,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 329 transitions, 4205 flow [2024-06-03 19:42:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:42:05,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-03 19:42:05,767 INFO L175 Difference]: Start difference. First operand has 238 places, 305 transitions, 3456 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:42:05,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 329 transitions, 4205 flow [2024-06-03 19:42:06,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 329 transitions, 4100 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:06,503 INFO L231 Difference]: Finished difference. Result has 240 places, 307 transitions, 3485 flow [2024-06-03 19:42:06,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3351, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3485, PETRI_PLACES=240, PETRI_TRANSITIONS=307} [2024-06-03 19:42:06,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-03 19:42:06,504 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 307 transitions, 3485 flow [2024-06-03 19:42:06,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:06,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:06,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:06,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:42:06,505 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)] === [2024-06-03 19:42:06,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:06,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1927946486, now seen corresponding path program 3 times [2024-06-03 19:42:06,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:06,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46366289] [2024-06-03 19:42:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:06,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:07,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:07,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46366289] [2024-06-03 19:42:07,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46366289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:07,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:07,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:07,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705691398] [2024-06-03 19:42:07,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:07,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:07,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:07,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:07,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 307 transitions, 3485 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:07,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:07,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:07,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:08,409 INFO L124 PetriNetUnfolderBase]: 2456/3987 cut-off events. [2024-06-03 19:42:08,409 INFO L125 PetriNetUnfolderBase]: For 416429/416432 co-relation queries the response was YES. [2024-06-03 19:42:08,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36587 conditions, 3987 events. 2456/3987 cut-off events. For 416429/416432 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23267 event pairs, 560 based on Foata normal form. 5/3983 useless extension candidates. Maximal degree in co-relation 36478. Up to 3594 conditions per place. [2024-06-03 19:42:08,452 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 269 selfloop transitions, 38 changer transitions 0/326 dead transitions. [2024-06-03 19:42:08,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 326 transitions, 4216 flow [2024-06-03 19:42:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:42:08,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:42:08,453 INFO L175 Difference]: Start difference. First operand has 240 places, 307 transitions, 3485 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:42:08,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 326 transitions, 4216 flow [2024-06-03 19:42:09,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 326 transitions, 4008 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:09,244 INFO L231 Difference]: Finished difference. Result has 241 places, 309 transitions, 3430 flow [2024-06-03 19:42:09,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3277, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3430, PETRI_PLACES=241, PETRI_TRANSITIONS=309} [2024-06-03 19:42:09,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-03 19:42:09,245 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 309 transitions, 3430 flow [2024-06-03 19:42:09,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:09,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:09,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:09,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:42:09,246 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)] === [2024-06-03 19:42:09,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1172030072, now seen corresponding path program 1 times [2024-06-03 19:42:09,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:09,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805494851] [2024-06-03 19:42:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:09,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:10,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:10,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805494851] [2024-06-03 19:42:10,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805494851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:10,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:10,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:42:10,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205550696] [2024-06-03 19:42:10,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:10,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:42:10,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:10,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:42:10,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:42:11,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:11,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 309 transitions, 3430 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:11,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:11,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:11,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:11,876 INFO L124 PetriNetUnfolderBase]: 2362/3858 cut-off events. [2024-06-03 19:42:11,876 INFO L125 PetriNetUnfolderBase]: For 417516/417548 co-relation queries the response was YES. [2024-06-03 19:42:11,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35601 conditions, 3858 events. 2362/3858 cut-off events. For 417516/417548 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22555 event pairs, 561 based on Foata normal form. 9/3836 useless extension candidates. Maximal degree in co-relation 35493. Up to 3409 conditions per place. [2024-06-03 19:42:11,923 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 243 selfloop transitions, 44 changer transitions 0/329 dead transitions. [2024-06-03 19:42:11,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 329 transitions, 4125 flow [2024-06-03 19:42:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:42:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:42:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:42:11,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:42:11,924 INFO L175 Difference]: Start difference. First operand has 241 places, 309 transitions, 3430 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:42:11,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 329 transitions, 4125 flow [2024-06-03 19:42:12,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 329 transitions, 3988 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:12,675 INFO L231 Difference]: Finished difference. Result has 244 places, 312 transitions, 3465 flow [2024-06-03 19:42:12,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3465, PETRI_PLACES=244, PETRI_TRANSITIONS=312} [2024-06-03 19:42:12,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-03 19:42:12,675 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 312 transitions, 3465 flow [2024-06-03 19:42:12,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:12,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:12,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:12,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:42:12,676 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:12,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2086302140, now seen corresponding path program 2 times [2024-06-03 19:42:12,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:12,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350969526] [2024-06-03 19:42:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:12,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:13,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:13,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350969526] [2024-06-03 19:42:13,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350969526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:13,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:13,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:13,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251604813] [2024-06-03 19:42:13,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:13,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:13,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:13,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:13,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:13,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:13,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 312 transitions, 3465 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:13,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:13,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:13,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:14,909 INFO L124 PetriNetUnfolderBase]: 2471/4015 cut-off events. [2024-06-03 19:42:14,909 INFO L125 PetriNetUnfolderBase]: For 430862/430869 co-relation queries the response was YES. [2024-06-03 19:42:14,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37219 conditions, 4015 events. 2471/4015 cut-off events. For 430862/430869 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23455 event pairs, 564 based on Foata normal form. 8/4014 useless extension candidates. Maximal degree in co-relation 37110. Up to 3579 conditions per place. [2024-06-03 19:42:14,950 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 269 selfloop transitions, 47 changer transitions 0/335 dead transitions. [2024-06-03 19:42:14,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 335 transitions, 4266 flow [2024-06-03 19:42:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:42:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:42:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:42:14,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:42:14,951 INFO L175 Difference]: Start difference. First operand has 244 places, 312 transitions, 3465 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:42:14,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 335 transitions, 4266 flow [2024-06-03 19:42:15,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 335 transitions, 4116 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:15,763 INFO L231 Difference]: Finished difference. Result has 246 places, 315 transitions, 3529 flow [2024-06-03 19:42:15,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3529, PETRI_PLACES=246, PETRI_TRANSITIONS=315} [2024-06-03 19:42:15,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-03 19:42:15,764 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 315 transitions, 3529 flow [2024-06-03 19:42:15,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:15,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:15,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:15,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:42:15,764 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)] === [2024-06-03 19:42:15,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash 25137348, now seen corresponding path program 3 times [2024-06-03 19:42:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:15,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711230788] [2024-06-03 19:42:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:15,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:16,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:16,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711230788] [2024-06-03 19:42:16,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711230788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:16,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:16,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:16,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896848017] [2024-06-03 19:42:16,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:16,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:16,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:16,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:16,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:17,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:17,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 315 transitions, 3529 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:17,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:17,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:17,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:17,888 INFO L124 PetriNetUnfolderBase]: 2476/4022 cut-off events. [2024-06-03 19:42:17,888 INFO L125 PetriNetUnfolderBase]: For 446062/446069 co-relation queries the response was YES. [2024-06-03 19:42:17,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37786 conditions, 4022 events. 2476/4022 cut-off events. For 446062/446069 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23503 event pairs, 564 based on Foata normal form. 8/4021 useless extension candidates. Maximal degree in co-relation 37676. Up to 3573 conditions per place. [2024-06-03 19:42:17,930 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 264 selfloop transitions, 56 changer transitions 0/339 dead transitions. [2024-06-03 19:42:17,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 339 transitions, 4586 flow [2024-06-03 19:42:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:42:17,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:42:17,932 INFO L175 Difference]: Start difference. First operand has 246 places, 315 transitions, 3529 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:42:17,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 339 transitions, 4586 flow [2024-06-03 19:42:18,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 339 transitions, 4406 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:18,652 INFO L231 Difference]: Finished difference. Result has 248 places, 321 transitions, 3701 flow [2024-06-03 19:42:18,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3701, PETRI_PLACES=248, PETRI_TRANSITIONS=321} [2024-06-03 19:42:18,652 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-03 19:42:18,652 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 321 transitions, 3701 flow [2024-06-03 19:42:18,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:18,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:18,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:18,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:42:18,653 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)] === [2024-06-03 19:42:18,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:18,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1858400990, now seen corresponding path program 4 times [2024-06-03 19:42:18,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:18,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295351447] [2024-06-03 19:42:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:18,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:19,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295351447] [2024-06-03 19:42:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295351447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:19,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:19,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:19,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389873344] [2024-06-03 19:42:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:19,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:19,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:19,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:19,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 321 transitions, 3701 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:19,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:19,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:19,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:20,671 INFO L124 PetriNetUnfolderBase]: 2473/4018 cut-off events. [2024-06-03 19:42:20,671 INFO L125 PetriNetUnfolderBase]: For 459151/459158 co-relation queries the response was YES. [2024-06-03 19:42:20,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38074 conditions, 4018 events. 2473/4018 cut-off events. For 459151/459158 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 23500 event pairs, 565 based on Foata normal form. 8/4017 useless extension candidates. Maximal degree in co-relation 37963. Up to 3582 conditions per place. [2024-06-03 19:42:20,714 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 281 selfloop transitions, 42 changer transitions 0/342 dead transitions. [2024-06-03 19:42:20,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 342 transitions, 4413 flow [2024-06-03 19:42:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:42:20,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:42:20,715 INFO L175 Difference]: Start difference. First operand has 248 places, 321 transitions, 3701 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:42:20,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 342 transitions, 4413 flow [2024-06-03 19:42:21,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 342 transitions, 4162 flow, removed 100 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:21,346 INFO L231 Difference]: Finished difference. Result has 252 places, 321 transitions, 3540 flow [2024-06-03 19:42:21,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3540, PETRI_PLACES=252, PETRI_TRANSITIONS=321} [2024-06-03 19:42:21,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-03 19:42:21,346 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 321 transitions, 3540 flow [2024-06-03 19:42:21,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:21,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:21,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:21,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:42:21,347 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)] === [2024-06-03 19:42:21,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2031254638, now seen corresponding path program 7 times [2024-06-03 19:42:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:21,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544156014] [2024-06-03 19:42:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:21,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:22,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:22,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544156014] [2024-06-03 19:42:22,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544156014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:22,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:22,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:22,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823248485] [2024-06-03 19:42:22,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:22,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:22,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:22,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:22,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:22,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 321 transitions, 3540 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:22,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:22,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:22,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:23,136 INFO L124 PetriNetUnfolderBase]: 2483/4031 cut-off events. [2024-06-03 19:42:23,136 INFO L125 PetriNetUnfolderBase]: For 471690/471693 co-relation queries the response was YES. [2024-06-03 19:42:23,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38322 conditions, 4031 events. 2483/4031 cut-off events. For 471690/471693 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23514 event pairs, 573 based on Foata normal form. 5/4027 useless extension candidates. Maximal degree in co-relation 38209. Up to 3564 conditions per place. [2024-06-03 19:42:23,191 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 280 selfloop transitions, 46 changer transitions 0/345 dead transitions. [2024-06-03 19:42:23,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 345 transitions, 4358 flow [2024-06-03 19:42:23,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:42:23,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-03 19:42:23,193 INFO L175 Difference]: Start difference. First operand has 252 places, 321 transitions, 3540 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:42:23,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 345 transitions, 4358 flow [2024-06-03 19:42:24,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 345 transitions, 4246 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:24,049 INFO L231 Difference]: Finished difference. Result has 253 places, 324 transitions, 3632 flow [2024-06-03 19:42:24,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3632, PETRI_PLACES=253, PETRI_TRANSITIONS=324} [2024-06-03 19:42:24,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-03 19:42:24,050 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 324 transitions, 3632 flow [2024-06-03 19:42:24,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:24,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:24,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:24,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:42:24,051 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)] === [2024-06-03 19:42:24,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1161171988, now seen corresponding path program 4 times [2024-06-03 19:42:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:24,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906985417] [2024-06-03 19:42:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:24,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:24,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:24,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906985417] [2024-06-03 19:42:24,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906985417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:24,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:24,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:24,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667226114] [2024-06-03 19:42:24,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:24,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:24,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:24,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:24,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 324 transitions, 3632 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:24,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:24,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:24,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:25,892 INFO L124 PetriNetUnfolderBase]: 2567/4128 cut-off events. [2024-06-03 19:42:25,893 INFO L125 PetriNetUnfolderBase]: For 481371/481375 co-relation queries the response was YES. [2024-06-03 19:42:25,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38983 conditions, 4128 events. 2567/4128 cut-off events. For 481371/481375 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23788 event pairs, 594 based on Foata normal form. 6/4133 useless extension candidates. Maximal degree in co-relation 38869. Up to 3814 conditions per place. [2024-06-03 19:42:25,945 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 301 selfloop transitions, 40 changer transitions 0/346 dead transitions. [2024-06-03 19:42:25,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 346 transitions, 4448 flow [2024-06-03 19:42:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:42:25,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:42:25,947 INFO L175 Difference]: Start difference. First operand has 253 places, 324 transitions, 3632 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:42:25,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 346 transitions, 4448 flow [2024-06-03 19:42:26,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 346 transitions, 4190 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-03 19:42:26,679 INFO L231 Difference]: Finished difference. Result has 252 places, 327 transitions, 3541 flow [2024-06-03 19:42:26,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3541, PETRI_PLACES=252, PETRI_TRANSITIONS=327} [2024-06-03 19:42:26,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-03 19:42:26,680 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 327 transitions, 3541 flow [2024-06-03 19:42:26,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:26,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:26,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:26,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:42:26,680 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)] === [2024-06-03 19:42:26,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:26,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1161172360, now seen corresponding path program 8 times [2024-06-03 19:42:26,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:26,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938126156] [2024-06-03 19:42:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:26,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:27,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:27,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938126156] [2024-06-03 19:42:27,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938126156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:27,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:27,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:27,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884529979] [2024-06-03 19:42:27,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:27,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:27,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:27,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:27,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 327 transitions, 3541 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:27,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:27,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:27,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:28,536 INFO L124 PetriNetUnfolderBase]: 2485/4037 cut-off events. [2024-06-03 19:42:28,536 INFO L125 PetriNetUnfolderBase]: For 487892/487895 co-relation queries the response was YES. [2024-06-03 19:42:28,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38291 conditions, 4037 events. 2485/4037 cut-off events. For 487892/487895 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23589 event pairs, 607 based on Foata normal form. 5/4033 useless extension candidates. Maximal degree in co-relation 38177. Up to 3542 conditions per place. [2024-06-03 19:42:28,588 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 274 selfloop transitions, 53 changer transitions 0/347 dead transitions. [2024-06-03 19:42:28,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 347 transitions, 4259 flow [2024-06-03 19:42:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:42:28,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-03 19:42:28,589 INFO L175 Difference]: Start difference. First operand has 252 places, 327 transitions, 3541 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:42:28,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 347 transitions, 4259 flow [2024-06-03 19:42:29,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 347 transitions, 4076 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:29,430 INFO L231 Difference]: Finished difference. Result has 254 places, 327 transitions, 3471 flow [2024-06-03 19:42:29,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=254, PETRI_TRANSITIONS=327} [2024-06-03 19:42:29,431 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-03 19:42:29,431 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 327 transitions, 3471 flow [2024-06-03 19:42:29,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:29,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:29,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:29,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:42:29,432 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)] === [2024-06-03 19:42:29,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:29,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2082183110, now seen corresponding path program 5 times [2024-06-03 19:42:29,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:29,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166264984] [2024-06-03 19:42:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:29,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:30,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166264984] [2024-06-03 19:42:30,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166264984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:30,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:30,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:30,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033561098] [2024-06-03 19:42:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:30,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:30,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:30,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:30,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:30,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:30,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 327 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:30,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:30,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:30,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:31,277 INFO L124 PetriNetUnfolderBase]: 2587/4158 cut-off events. [2024-06-03 19:42:31,277 INFO L125 PetriNetUnfolderBase]: For 502748/502752 co-relation queries the response was YES. [2024-06-03 19:42:31,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39277 conditions, 4158 events. 2587/4158 cut-off events. For 502748/502752 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24013 event pairs, 589 based on Foata normal form. 6/4163 useless extension candidates. Maximal degree in co-relation 39162. Up to 3760 conditions per place. [2024-06-03 19:42:31,329 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 285 selfloop transitions, 63 changer transitions 0/353 dead transitions. [2024-06-03 19:42:31,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 353 transitions, 4728 flow [2024-06-03 19:42:31,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:42:31,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:42:31,330 INFO L175 Difference]: Start difference. First operand has 254 places, 327 transitions, 3471 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:42:31,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 353 transitions, 4728 flow [2024-06-03 19:42:32,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 353 transitions, 4528 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:32,177 INFO L231 Difference]: Finished difference. Result has 256 places, 334 transitions, 3653 flow [2024-06-03 19:42:32,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3653, PETRI_PLACES=256, PETRI_TRANSITIONS=334} [2024-06-03 19:42:32,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-03 19:42:32,178 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 334 transitions, 3653 flow [2024-06-03 19:42:32,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:32,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:32,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:32,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:42:32,178 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)] === [2024-06-03 19:42:32,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:32,179 INFO L85 PathProgramCache]: Analyzing trace with hash -2082183482, now seen corresponding path program 9 times [2024-06-03 19:42:32,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:32,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168761266] [2024-06-03 19:42:32,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:32,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:33,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168761266] [2024-06-03 19:42:33,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168761266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:33,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:33,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:33,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025818216] [2024-06-03 19:42:33,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:33,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:33,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:33,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:33,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 334 transitions, 3653 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:33,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:33,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:33,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:34,061 INFO L124 PetriNetUnfolderBase]: 2522/4100 cut-off events. [2024-06-03 19:42:34,061 INFO L125 PetriNetUnfolderBase]: For 527456/527461 co-relation queries the response was YES. [2024-06-03 19:42:34,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39778 conditions, 4100 events. 2522/4100 cut-off events. For 527456/527461 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24146 event pairs, 604 based on Foata normal form. 7/4089 useless extension candidates. Maximal degree in co-relation 39661. Up to 3515 conditions per place. [2024-06-03 19:42:34,110 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 77 changer transitions 0/354 dead transitions. [2024-06-03 19:42:34,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 354 transitions, 4498 flow [2024-06-03 19:42:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:42:34,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-03 19:42:34,111 INFO L175 Difference]: Start difference. First operand has 256 places, 334 transitions, 3653 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:42:34,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 354 transitions, 4498 flow [2024-06-03 19:42:34,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 354 transitions, 4344 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-03 19:42:34,911 INFO L231 Difference]: Finished difference. Result has 261 places, 337 transitions, 3793 flow [2024-06-03 19:42:34,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3793, PETRI_PLACES=261, PETRI_TRANSITIONS=337} [2024-06-03 19:42:34,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-03 19:42:34,912 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 337 transitions, 3793 flow [2024-06-03 19:42:34,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:34,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:34,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:34,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:42:34,913 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)] === [2024-06-03 19:42:34,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash -806493238, now seen corresponding path program 6 times [2024-06-03 19:42:34,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:34,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284554213] [2024-06-03 19:42:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:34,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:35,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:35,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284554213] [2024-06-03 19:42:35,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284554213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:35,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:35,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:35,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195578784] [2024-06-03 19:42:35,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:35,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:35,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:35,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:35,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 337 transitions, 3793 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:35,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:35,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:35,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:36,799 INFO L124 PetriNetUnfolderBase]: 2591/4170 cut-off events. [2024-06-03 19:42:36,799 INFO L125 PetriNetUnfolderBase]: For 532022/532026 co-relation queries the response was YES. [2024-06-03 19:42:36,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40452 conditions, 4170 events. 2591/4170 cut-off events. For 532022/532026 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24114 event pairs, 624 based on Foata normal form. 6/4175 useless extension candidates. Maximal degree in co-relation 40333. Up to 3769 conditions per place. [2024-06-03 19:42:36,844 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 282 selfloop transitions, 68 changer transitions 0/355 dead transitions. [2024-06-03 19:42:36,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 355 transitions, 4698 flow [2024-06-03 19:42:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:42:36,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 19:42:36,846 INFO L175 Difference]: Start difference. First operand has 261 places, 337 transitions, 3793 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:42:36,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 355 transitions, 4698 flow [2024-06-03 19:42:37,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 355 transitions, 4372 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:37,863 INFO L231 Difference]: Finished difference. Result has 263 places, 337 transitions, 3609 flow [2024-06-03 19:42:37,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3609, PETRI_PLACES=263, PETRI_TRANSITIONS=337} [2024-06-03 19:42:37,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-03 19:42:37,864 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 337 transitions, 3609 flow [2024-06-03 19:42:37,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:37,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:37,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:37,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:42:37,864 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)] === [2024-06-03 19:42:37,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:37,865 INFO L85 PathProgramCache]: Analyzing trace with hash 541003994, now seen corresponding path program 10 times [2024-06-03 19:42:37,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:37,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561312212] [2024-06-03 19:42:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:37,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:38,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:38,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561312212] [2024-06-03 19:42:38,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561312212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:38,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:38,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:38,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020093883] [2024-06-03 19:42:38,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:38,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:38,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:38,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:38,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:38,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:38,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 337 transitions, 3609 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:38,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:38,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:38,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:39,869 INFO L124 PetriNetUnfolderBase]: 2548/4152 cut-off events. [2024-06-03 19:42:39,869 INFO L125 PetriNetUnfolderBase]: For 562906/562913 co-relation queries the response was YES. [2024-06-03 19:42:39,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41106 conditions, 4152 events. 2548/4152 cut-off events. For 562906/562913 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24615 event pairs, 631 based on Foata normal form. 9/4139 useless extension candidates. Maximal degree in co-relation 40986. Up to 3422 conditions per place. [2024-06-03 19:42:39,916 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 219 selfloop transitions, 122 changer transitions 0/363 dead transitions. [2024-06-03 19:42:39,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 363 transitions, 5197 flow [2024-06-03 19:42:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:42:39,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-03 19:42:39,918 INFO L175 Difference]: Start difference. First operand has 263 places, 337 transitions, 3609 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:42:39,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 363 transitions, 5197 flow [2024-06-03 19:42:41,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 363 transitions, 5071 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:41,031 INFO L231 Difference]: Finished difference. Result has 265 places, 346 transitions, 4141 flow [2024-06-03 19:42:41,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3483, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4141, PETRI_PLACES=265, PETRI_TRANSITIONS=346} [2024-06-03 19:42:41,032 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-03 19:42:41,032 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 346 transitions, 4141 flow [2024-06-03 19:42:41,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:41,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:41,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:41,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:42:41,032 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)] === [2024-06-03 19:42:41,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash -647698904, now seen corresponding path program 7 times [2024-06-03 19:42:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:41,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951545737] [2024-06-03 19:42:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:42,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:42,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951545737] [2024-06-03 19:42:42,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951545737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:42,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:42,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056083738] [2024-06-03 19:42:42,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:42,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:42,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:42,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 346 transitions, 4141 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:42,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:42,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:42,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:43,113 INFO L124 PetriNetUnfolderBase]: 2659/4280 cut-off events. [2024-06-03 19:42:43,113 INFO L125 PetriNetUnfolderBase]: For 588832/588838 co-relation queries the response was YES. [2024-06-03 19:42:43,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42954 conditions, 4280 events. 2659/4280 cut-off events. For 588832/588838 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24942 event pairs, 594 based on Foata normal form. 8/4287 useless extension candidates. Maximal degree in co-relation 42833. Up to 3720 conditions per place. [2024-06-03 19:42:43,166 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 264 selfloop transitions, 107 changer transitions 0/376 dead transitions. [2024-06-03 19:42:43,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 376 transitions, 5737 flow [2024-06-03 19:42:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:42:43,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:42:43,167 INFO L175 Difference]: Start difference. First operand has 265 places, 346 transitions, 4141 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:42:43,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 376 transitions, 5737 flow [2024-06-03 19:42:44,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 376 transitions, 5357 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:44,242 INFO L231 Difference]: Finished difference. Result has 270 places, 359 transitions, 4365 flow [2024-06-03 19:42:44,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3767, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4365, PETRI_PLACES=270, PETRI_TRANSITIONS=359} [2024-06-03 19:42:44,243 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-03 19:42:44,243 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 359 transitions, 4365 flow [2024-06-03 19:42:44,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:44,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:44,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:44,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:42:44,244 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)] === [2024-06-03 19:42:44,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2135360168, now seen corresponding path program 8 times [2024-06-03 19:42:44,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:44,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570439380] [2024-06-03 19:42:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:44,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:45,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:45,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570439380] [2024-06-03 19:42:45,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570439380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:45,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:45,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:45,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721354155] [2024-06-03 19:42:45,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:45,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:45,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:45,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:45,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:45,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 359 transitions, 4365 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:45,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:45,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:45,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:46,395 INFO L124 PetriNetUnfolderBase]: 2685/4318 cut-off events. [2024-06-03 19:42:46,395 INFO L125 PetriNetUnfolderBase]: For 604526/604532 co-relation queries the response was YES. [2024-06-03 19:42:46,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43504 conditions, 4318 events. 2685/4318 cut-off events. For 604526/604532 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25171 event pairs, 630 based on Foata normal form. 8/4325 useless extension candidates. Maximal degree in co-relation 43381. Up to 3745 conditions per place. [2024-06-03 19:42:46,445 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 251 selfloop transitions, 125 changer transitions 0/381 dead transitions. [2024-06-03 19:42:46,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 381 transitions, 5698 flow [2024-06-03 19:42:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:42:46,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:42:46,446 INFO L175 Difference]: Start difference. First operand has 270 places, 359 transitions, 4365 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:42:46,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 381 transitions, 5698 flow [2024-06-03 19:42:47,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 381 transitions, 5398 flow, removed 105 selfloop flow, removed 3 redundant places. [2024-06-03 19:42:47,395 INFO L231 Difference]: Finished difference. Result has 275 places, 365 transitions, 4544 flow [2024-06-03 19:42:47,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4121, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4544, PETRI_PLACES=275, PETRI_TRANSITIONS=365} [2024-06-03 19:42:47,396 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-03 19:42:47,396 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 365 transitions, 4544 flow [2024-06-03 19:42:47,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:47,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:47,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:47,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:42:47,396 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)] === [2024-06-03 19:42:47,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:47,396 INFO L85 PathProgramCache]: Analyzing trace with hash 541241516, now seen corresponding path program 9 times [2024-06-03 19:42:47,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:47,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086493695] [2024-06-03 19:42:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:47,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:48,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:48,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086493695] [2024-06-03 19:42:48,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086493695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:48,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:48,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896390936] [2024-06-03 19:42:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:48,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:48,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:48,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:48,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 365 transitions, 4544 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:48,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:48,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:48,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:49,293 INFO L124 PetriNetUnfolderBase]: 2679/4312 cut-off events. [2024-06-03 19:42:49,293 INFO L125 PetriNetUnfolderBase]: For 607403/607409 co-relation queries the response was YES. [2024-06-03 19:42:49,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43456 conditions, 4312 events. 2679/4312 cut-off events. For 607403/607409 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 25140 event pairs, 638 based on Foata normal form. 8/4319 useless extension candidates. Maximal degree in co-relation 43331. Up to 3740 conditions per place. [2024-06-03 19:42:49,344 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 263 selfloop transitions, 114 changer transitions 0/382 dead transitions. [2024-06-03 19:42:49,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 382 transitions, 5820 flow [2024-06-03 19:42:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:42:49,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:42:49,345 INFO L175 Difference]: Start difference. First operand has 275 places, 365 transitions, 4544 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:42:49,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 382 transitions, 5820 flow [2024-06-03 19:42:50,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 382 transitions, 5501 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:50,446 INFO L231 Difference]: Finished difference. Result has 279 places, 365 transitions, 4459 flow [2024-06-03 19:42:50,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4225, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4459, PETRI_PLACES=279, PETRI_TRANSITIONS=365} [2024-06-03 19:42:50,447 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-03 19:42:50,447 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 365 transitions, 4459 flow [2024-06-03 19:42:50,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:50,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:50,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:50,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:42:50,447 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)] === [2024-06-03 19:42:50,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:50,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1735505366, now seen corresponding path program 11 times [2024-06-03 19:42:50,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:50,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870021258] [2024-06-03 19:42:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:50,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:51,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:51,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870021258] [2024-06-03 19:42:51,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870021258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:51,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:51,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:51,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70955273] [2024-06-03 19:42:51,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:51,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:51,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:51,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:51,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:51,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:42:51,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 365 transitions, 4459 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:51,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:51,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:42:51,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:52,548 INFO L124 PetriNetUnfolderBase]: 2599/4211 cut-off events. [2024-06-03 19:42:52,548 INFO L125 PetriNetUnfolderBase]: For 614415/614415 co-relation queries the response was YES. [2024-06-03 19:42:52,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42854 conditions, 4211 events. 2599/4211 cut-off events. For 614415/614415 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24694 event pairs, 629 based on Foata normal form. 2/4208 useless extension candidates. Maximal degree in co-relation 42728. Up to 3756 conditions per place. [2024-06-03 19:42:52,600 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 305 selfloop transitions, 43 changer transitions 0/377 dead transitions. [2024-06-03 19:42:52,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 377 transitions, 5190 flow [2024-06-03 19:42:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:42:52,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:42:52,601 INFO L175 Difference]: Start difference. First operand has 279 places, 365 transitions, 4459 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:42:52,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 377 transitions, 5190 flow [2024-06-03 19:42:53,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 377 transitions, 4814 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:53,863 INFO L231 Difference]: Finished difference. Result has 280 places, 365 transitions, 4175 flow [2024-06-03 19:42:53,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4175, PETRI_PLACES=280, PETRI_TRANSITIONS=365} [2024-06-03 19:42:53,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-03 19:42:53,863 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 365 transitions, 4175 flow [2024-06-03 19:42:53,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:53,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:53,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:53,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:42:53,864 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)] === [2024-06-03 19:42:53,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:53,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2141074088, now seen corresponding path program 10 times [2024-06-03 19:42:53,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:53,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427161359] [2024-06-03 19:42:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:53,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:54,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:54,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427161359] [2024-06-03 19:42:54,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427161359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:54,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:54,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:54,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005140627] [2024-06-03 19:42:54,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:54,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:54,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:54,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:54,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:54,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:54,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 365 transitions, 4175 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:54,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:54,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:54,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:55,918 INFO L124 PetriNetUnfolderBase]: 2683/4316 cut-off events. [2024-06-03 19:42:55,918 INFO L125 PetriNetUnfolderBase]: For 623533/623539 co-relation queries the response was YES. [2024-06-03 19:42:55,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43054 conditions, 4316 events. 2683/4316 cut-off events. For 623533/623539 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25163 event pairs, 625 based on Foata normal form. 8/4323 useless extension candidates. Maximal degree in co-relation 42927. Up to 3742 conditions per place. [2024-06-03 19:42:55,976 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 128 changer transitions 0/383 dead transitions. [2024-06-03 19:42:55,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 383 transitions, 5223 flow [2024-06-03 19:42:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:42:55,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:42:55,978 INFO L175 Difference]: Start difference. First operand has 280 places, 365 transitions, 4175 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:42:55,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 383 transitions, 5223 flow [2024-06-03 19:42:57,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 383 transitions, 5057 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 19:42:57,112 INFO L231 Difference]: Finished difference. Result has 279 places, 368 transitions, 4357 flow [2024-06-03 19:42:57,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4009, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4357, PETRI_PLACES=279, PETRI_TRANSITIONS=368} [2024-06-03 19:42:57,112 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-03 19:42:57,112 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 368 transitions, 4357 flow [2024-06-03 19:42:57,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:57,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:57,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:57,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:42:57,113 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)] === [2024-06-03 19:42:57,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:57,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1912757228, now seen corresponding path program 11 times [2024-06-03 19:42:57,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:57,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263705661] [2024-06-03 19:42:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:57,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:58,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:58,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263705661] [2024-06-03 19:42:58,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263705661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:58,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:58,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:58,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20145064] [2024-06-03 19:42:58,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:58,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:58,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:58,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:58,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 368 transitions, 4357 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:58,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:58,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:58,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:59,064 INFO L124 PetriNetUnfolderBase]: 2677/4310 cut-off events. [2024-06-03 19:42:59,064 INFO L125 PetriNetUnfolderBase]: For 630339/630345 co-relation queries the response was YES. [2024-06-03 19:42:59,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43218 conditions, 4310 events. 2677/4310 cut-off events. For 630339/630345 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25159 event pairs, 645 based on Foata normal form. 8/4317 useless extension candidates. Maximal degree in co-relation 43091. Up to 3737 conditions per place. [2024-06-03 19:42:59,120 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 261 selfloop transitions, 120 changer transitions 0/386 dead transitions. [2024-06-03 19:42:59,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 386 transitions, 5541 flow [2024-06-03 19:42:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:42:59,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:42:59,121 INFO L175 Difference]: Start difference. First operand has 279 places, 368 transitions, 4357 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:42:59,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 386 transitions, 5541 flow [2024-06-03 19:43:00,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 386 transitions, 5203 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:00,490 INFO L231 Difference]: Finished difference. Result has 282 places, 370 transitions, 4313 flow [2024-06-03 19:43:00,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4313, PETRI_PLACES=282, PETRI_TRANSITIONS=370} [2024-06-03 19:43:00,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-03 19:43:00,491 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 370 transitions, 4313 flow [2024-06-03 19:43:00,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:00,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:00,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:00,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:43:00,491 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)] === [2024-06-03 19:43:00,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1913172938, now seen corresponding path program 12 times [2024-06-03 19:43:00,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:00,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615837298] [2024-06-03 19:43:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:00,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:01,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:01,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615837298] [2024-06-03 19:43:01,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615837298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:01,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:01,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:01,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374928172] [2024-06-03 19:43:01,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:01,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:01,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:01,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:01,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:01,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:43:01,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 370 transitions, 4313 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:01,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:01,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:43:01,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:02,418 INFO L124 PetriNetUnfolderBase]: 2671/4304 cut-off events. [2024-06-03 19:43:02,418 INFO L125 PetriNetUnfolderBase]: For 635459/635465 co-relation queries the response was YES. [2024-06-03 19:43:02,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42976 conditions, 4304 events. 2671/4304 cut-off events. For 635459/635465 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25179 event pairs, 643 based on Foata normal form. 8/4311 useless extension candidates. Maximal degree in co-relation 42848. Up to 3732 conditions per place. [2024-06-03 19:43:02,474 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 123 changer transitions 0/385 dead transitions. [2024-06-03 19:43:02,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 385 transitions, 5283 flow [2024-06-03 19:43:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:43:02,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:43:02,475 INFO L175 Difference]: Start difference. First operand has 282 places, 370 transitions, 4313 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:43:02,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 385 transitions, 5283 flow [2024-06-03 19:43:03,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 385 transitions, 5029 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:03,609 INFO L231 Difference]: Finished difference. Result has 286 places, 370 transitions, 4311 flow [2024-06-03 19:43:03,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4059, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4311, PETRI_PLACES=286, PETRI_TRANSITIONS=370} [2024-06-03 19:43:03,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-03 19:43:03,610 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 370 transitions, 4311 flow [2024-06-03 19:43:03,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:03,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:03,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:03,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:43:03,610 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)] === [2024-06-03 19:43:03,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1912756856, now seen corresponding path program 12 times [2024-06-03 19:43:03,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:03,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824696455] [2024-06-03 19:43:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:03,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:04,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:04,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824696455] [2024-06-03 19:43:04,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824696455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:04,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:04,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:04,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055864790] [2024-06-03 19:43:04,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:04,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:04,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:04,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:43:04,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 370 transitions, 4311 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:04,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:04,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:43:04,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:05,551 INFO L124 PetriNetUnfolderBase]: 2585/4216 cut-off events. [2024-06-03 19:43:05,552 INFO L125 PetriNetUnfolderBase]: For 648955/648959 co-relation queries the response was YES. [2024-06-03 19:43:05,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42534 conditions, 4216 events. 2585/4216 cut-off events. For 648955/648959 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25139 event pairs, 640 based on Foata normal form. 6/4204 useless extension candidates. Maximal degree in co-relation 42405. Up to 3469 conditions per place. [2024-06-03 19:43:05,605 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 228 selfloop transitions, 127 changer transitions 0/385 dead transitions. [2024-06-03 19:43:05,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 385 transitions, 5233 flow [2024-06-03 19:43:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:43:05,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:43:05,606 INFO L175 Difference]: Start difference. First operand has 286 places, 370 transitions, 4311 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:43:05,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 385 transitions, 5233 flow [2024-06-03 19:43:07,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 385 transitions, 4897 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:07,111 INFO L231 Difference]: Finished difference. Result has 287 places, 370 transitions, 4235 flow [2024-06-03 19:43:07,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4235, PETRI_PLACES=287, PETRI_TRANSITIONS=370} [2024-06-03 19:43:07,112 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-03 19:43:07,112 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 370 transitions, 4235 flow [2024-06-03 19:43:07,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:07,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:07,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:07,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:43:07,113 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)] === [2024-06-03 19:43:07,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1781290132, now seen corresponding path program 4 times [2024-06-03 19:43:07,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:07,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85306568] [2024-06-03 19:43:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:07,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:08,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:08,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85306568] [2024-06-03 19:43:08,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85306568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:08,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:08,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:08,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945424610] [2024-06-03 19:43:08,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:08,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:08,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:08,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:08,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:08,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:43:08,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 370 transitions, 4235 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:08,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:08,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:43:08,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:09,108 INFO L124 PetriNetUnfolderBase]: 2588/4200 cut-off events. [2024-06-03 19:43:09,109 INFO L125 PetriNetUnfolderBase]: For 647572/647572 co-relation queries the response was YES. [2024-06-03 19:43:09,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42244 conditions, 4200 events. 2588/4200 cut-off events. For 647572/647572 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24746 event pairs, 592 based on Foata normal form. 2/4197 useless extension candidates. Maximal degree in co-relation 42114. Up to 3741 conditions per place. [2024-06-03 19:43:09,162 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 312 selfloop transitions, 42 changer transitions 0/384 dead transitions. [2024-06-03 19:43:09,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 384 transitions, 5056 flow [2024-06-03 19:43:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:43:09,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 19:43:09,164 INFO L175 Difference]: Start difference. First operand has 287 places, 370 transitions, 4235 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:43:09,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 384 transitions, 5056 flow [2024-06-03 19:43:10,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 384 transitions, 4764 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:10,457 INFO L231 Difference]: Finished difference. Result has 288 places, 372 transitions, 4116 flow [2024-06-03 19:43:10,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4116, PETRI_PLACES=288, PETRI_TRANSITIONS=372} [2024-06-03 19:43:10,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-03 19:43:10,458 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 372 transitions, 4116 flow [2024-06-03 19:43:10,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:10,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:10,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:10,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:43:10,459 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)] === [2024-06-03 19:43:10,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2145788630, now seen corresponding path program 2 times [2024-06-03 19:43:10,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:10,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2687853] [2024-06-03 19:43:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:10,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:11,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:11,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2687853] [2024-06-03 19:43:11,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2687853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:11,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:11,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:43:11,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370152822] [2024-06-03 19:43:11,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:11,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:43:11,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:43:11,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:43:11,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:43:11,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 372 transitions, 4116 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:11,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:11,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:43:11,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:12,601 INFO L124 PetriNetUnfolderBase]: 2477/4046 cut-off events. [2024-06-03 19:43:12,601 INFO L125 PetriNetUnfolderBase]: For 669943/669984 co-relation queries the response was YES. [2024-06-03 19:43:12,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41035 conditions, 4046 events. 2477/4046 cut-off events. For 669943/669984 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24055 event pairs, 622 based on Foata normal form. 7/4011 useless extension candidates. Maximal degree in co-relation 40904. Up to 3503 conditions per place. [2024-06-03 19:43:12,651 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 81 changer transitions 0/395 dead transitions. [2024-06-03 19:43:12,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 395 transitions, 5419 flow [2024-06-03 19:43:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:43:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:43:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:43:12,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:43:12,652 INFO L175 Difference]: Start difference. First operand has 288 places, 372 transitions, 4116 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:43:12,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 395 transitions, 5419 flow [2024-06-03 19:43:13,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 395 transitions, 5256 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:43:13,886 INFO L231 Difference]: Finished difference. Result has 291 places, 381 transitions, 4373 flow [2024-06-03 19:43:13,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4373, PETRI_PLACES=291, PETRI_TRANSITIONS=381} [2024-06-03 19:43:13,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-03 19:43:13,887 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 381 transitions, 4373 flow [2024-06-03 19:43:13,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:13,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:13,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:13,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:43:13,887 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)] === [2024-06-03 19:43:13,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:13,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2145774680, now seen corresponding path program 3 times [2024-06-03 19:43:13,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:13,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750410063] [2024-06-03 19:43:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:13,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:15,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:15,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750410063] [2024-06-03 19:43:15,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750410063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:15,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:15,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:43:15,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851133356] [2024-06-03 19:43:15,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:15,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:43:15,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:43:15,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:43:15,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:43:15,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 381 transitions, 4373 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:15,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:15,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:43:15,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:16,108 INFO L124 PetriNetUnfolderBase]: 2471/4046 cut-off events. [2024-06-03 19:43:16,108 INFO L125 PetriNetUnfolderBase]: For 672844/672860 co-relation queries the response was YES. [2024-06-03 19:43:16,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40936 conditions, 4046 events. 2471/4046 cut-off events. For 672844/672860 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24137 event pairs, 642 based on Foata normal form. 6/4014 useless extension candidates. Maximal degree in co-relation 40804. Up to 3614 conditions per place. [2024-06-03 19:43:16,162 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 314 selfloop transitions, 21 changer transitions 0/392 dead transitions. [2024-06-03 19:43:16,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 392 transitions, 5071 flow [2024-06-03 19:43:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:43:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:43:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:43:16,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-03 19:43:16,163 INFO L175 Difference]: Start difference. First operand has 291 places, 381 transitions, 4373 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:43:16,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 392 transitions, 5071 flow [2024-06-03 19:43:17,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 392 transitions, 4844 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:17,362 INFO L231 Difference]: Finished difference. Result has 296 places, 381 transitions, 4194 flow [2024-06-03 19:43:17,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4194, PETRI_PLACES=296, PETRI_TRANSITIONS=381} [2024-06-03 19:43:17,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-03 19:43:17,362 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 381 transitions, 4194 flow [2024-06-03 19:43:17,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:17,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:17,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:17,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:43:17,363 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)] === [2024-06-03 19:43:17,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:17,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1735871786, now seen corresponding path program 4 times [2024-06-03 19:43:17,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:17,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052850731] [2024-06-03 19:43:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:17,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:18,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:18,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052850731] [2024-06-03 19:43:18,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052850731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:18,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:18,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:43:18,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823879397] [2024-06-03 19:43:18,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:18,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:43:18,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:18,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:43:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:43:18,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:43:18,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 381 transitions, 4194 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:18,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:18,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:43:18,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:19,371 INFO L124 PetriNetUnfolderBase]: 2476/4047 cut-off events. [2024-06-03 19:43:19,371 INFO L125 PetriNetUnfolderBase]: For 685231/685276 co-relation queries the response was YES. [2024-06-03 19:43:19,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40994 conditions, 4047 events. 2476/4047 cut-off events. For 685231/685276 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24075 event pairs, 619 based on Foata normal form. 7/4012 useless extension candidates. Maximal degree in co-relation 40860. Up to 3504 conditions per place. [2024-06-03 19:43:19,422 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 266 selfloop transitions, 74 changer transitions 0/397 dead transitions. [2024-06-03 19:43:19,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 397 transitions, 5165 flow [2024-06-03 19:43:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:43:19,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:43:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:43:19,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:43:19,424 INFO L175 Difference]: Start difference. First operand has 296 places, 381 transitions, 4194 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:43:19,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 397 transitions, 5165 flow [2024-06-03 19:43:20,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 397 transitions, 5115 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:43:20,540 INFO L231 Difference]: Finished difference. Result has 297 places, 384 transitions, 4378 flow [2024-06-03 19:43:20,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4378, PETRI_PLACES=297, PETRI_TRANSITIONS=384} [2024-06-03 19:43:20,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-03 19:43:20,541 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 384 transitions, 4378 flow [2024-06-03 19:43:20,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:20,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:20,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:20,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:43:20,541 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)] === [2024-06-03 19:43:20,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash 940747754, now seen corresponding path program 5 times [2024-06-03 19:43:20,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:20,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551385670] [2024-06-03 19:43:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:20,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:21,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:21,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551385670] [2024-06-03 19:43:21,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551385670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:21,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:21,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:43:21,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160112219] [2024-06-03 19:43:21,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:21,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:43:21,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:21,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:43:21,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:43:21,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:43:21,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 384 transitions, 4378 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:21,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:21,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:43:21,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:22,567 INFO L124 PetriNetUnfolderBase]: 2472/4040 cut-off events. [2024-06-03 19:43:22,567 INFO L125 PetriNetUnfolderBase]: For 691113/691146 co-relation queries the response was YES. [2024-06-03 19:43:22,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41042 conditions, 4040 events. 2472/4040 cut-off events. For 691113/691146 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24064 event pairs, 618 based on Foata normal form. 7/4006 useless extension candidates. Maximal degree in co-relation 40907. Up to 3501 conditions per place. [2024-06-03 19:43:22,620 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 259 selfloop transitions, 80 changer transitions 0/396 dead transitions. [2024-06-03 19:43:22,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 396 transitions, 5089 flow [2024-06-03 19:43:22,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:43:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:43:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:43:22,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:43:22,621 INFO L175 Difference]: Start difference. First operand has 297 places, 384 transitions, 4378 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:43:22,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 396 transitions, 5089 flow [2024-06-03 19:43:23,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 396 transitions, 4838 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-03 19:43:23,743 INFO L231 Difference]: Finished difference. Result has 300 places, 384 transitions, 4293 flow [2024-06-03 19:43:23,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4293, PETRI_PLACES=300, PETRI_TRANSITIONS=384} [2024-06-03 19:43:23,743 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-03 19:43:23,743 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 384 transitions, 4293 flow [2024-06-03 19:43:23,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:23,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:23,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:23,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:43:23,744 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)] === [2024-06-03 19:43:23,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:23,745 INFO L85 PathProgramCache]: Analyzing trace with hash 19921532, now seen corresponding path program 13 times [2024-06-03 19:43:23,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:23,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224040670] [2024-06-03 19:43:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:23,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:24,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:24,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224040670] [2024-06-03 19:43:24,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224040670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:24,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:24,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:24,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295165874] [2024-06-03 19:43:24,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:24,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:24,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:24,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:43:24,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 384 transitions, 4293 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:24,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:24,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:43:24,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:25,791 INFO L124 PetriNetUnfolderBase]: 2699/4376 cut-off events. [2024-06-03 19:43:25,791 INFO L125 PetriNetUnfolderBase]: For 712637/712639 co-relation queries the response was YES. [2024-06-03 19:43:25,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43615 conditions, 4376 events. 2699/4376 cut-off events. For 712637/712639 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25918 event pairs, 622 based on Foata normal form. 4/4375 useless extension candidates. Maximal degree in co-relation 43479. Up to 3867 conditions per place. [2024-06-03 19:43:25,849 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 359 selfloop transitions, 61 changer transitions 0/450 dead transitions. [2024-06-03 19:43:25,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 450 transitions, 5634 flow [2024-06-03 19:43:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:43:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:43:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-03 19:43:25,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-03 19:43:25,850 INFO L175 Difference]: Start difference. First operand has 300 places, 384 transitions, 4293 flow. Second operand 11 states and 211 transitions. [2024-06-03 19:43:25,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 450 transitions, 5634 flow [2024-06-03 19:43:26,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 450 transitions, 5398 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 19:43:26,990 INFO L231 Difference]: Finished difference. Result has 305 places, 416 transitions, 4665 flow [2024-06-03 19:43:26,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4665, PETRI_PLACES=305, PETRI_TRANSITIONS=416} [2024-06-03 19:43:26,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-03 19:43:26,990 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 416 transitions, 4665 flow [2024-06-03 19:43:26,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:26,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:26,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:26,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:43:26,991 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)] === [2024-06-03 19:43:26,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:26,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1697471348, now seen corresponding path program 14 times [2024-06-03 19:43:26,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:26,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910523955] [2024-06-03 19:43:26,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:26,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:27,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:27,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910523955] [2024-06-03 19:43:27,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910523955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:27,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:27,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:27,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991509941] [2024-06-03 19:43:27,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:27,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:27,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:27,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:27,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:28,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:43:28,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 416 transitions, 4665 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:28,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:28,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:43:28,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:29,135 INFO L124 PetriNetUnfolderBase]: 2771/4492 cut-off events. [2024-06-03 19:43:29,135 INFO L125 PetriNetUnfolderBase]: For 720585/720587 co-relation queries the response was YES. [2024-06-03 19:43:29,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44682 conditions, 4492 events. 2771/4492 cut-off events. For 720585/720587 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26735 event pairs, 625 based on Foata normal form. 4/4491 useless extension candidates. Maximal degree in co-relation 44542. Up to 3963 conditions per place. [2024-06-03 19:43:29,187 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 374 selfloop transitions, 73 changer transitions 0/477 dead transitions. [2024-06-03 19:43:29,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 477 transitions, 6126 flow [2024-06-03 19:43:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:43:29,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-03 19:43:29,188 INFO L175 Difference]: Start difference. First operand has 305 places, 416 transitions, 4665 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:43:29,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 477 transitions, 6126 flow [2024-06-03 19:43:30,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 477 transitions, 5748 flow, removed 125 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:30,553 INFO L231 Difference]: Finished difference. Result has 311 places, 449 transitions, 5021 flow [2024-06-03 19:43:30,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4407, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5021, PETRI_PLACES=311, PETRI_TRANSITIONS=449} [2024-06-03 19:43:30,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-03 19:43:30,554 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 449 transitions, 5021 flow [2024-06-03 19:43:30,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:30,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:30,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:43:30,554 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)] === [2024-06-03 19:43:30,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 256138348, now seen corresponding path program 13 times [2024-06-03 19:43:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:30,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808739075] [2024-06-03 19:43:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:30,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:31,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:31,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808739075] [2024-06-03 19:43:31,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808739075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:31,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:31,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:31,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749561261] [2024-06-03 19:43:31,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:31,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:31,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:31,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:31,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:31,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:43:31,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 449 transitions, 5021 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:31,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:31,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:43:31,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:32,470 INFO L124 PetriNetUnfolderBase]: 2864/4598 cut-off events. [2024-06-03 19:43:32,470 INFO L125 PetriNetUnfolderBase]: For 720322/720326 co-relation queries the response was YES. [2024-06-03 19:43:32,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45025 conditions, 4598 events. 2864/4598 cut-off events. For 720322/720326 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 27089 event pairs, 669 based on Foata normal form. 6/4603 useless extension candidates. Maximal degree in co-relation 44882. Up to 4229 conditions per place. [2024-06-03 19:43:32,529 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 427 selfloop transitions, 50 changer transitions 0/482 dead transitions. [2024-06-03 19:43:32,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 482 transitions, 6216 flow [2024-06-03 19:43:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:43:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:43:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:43:32,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:43:32,531 INFO L175 Difference]: Start difference. First operand has 311 places, 449 transitions, 5021 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:43:32,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 482 transitions, 6216 flow [2024-06-03 19:43:34,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 482 transitions, 6047 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:34,343 INFO L231 Difference]: Finished difference. Result has 317 places, 458 transitions, 5139 flow [2024-06-03 19:43:34,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4852, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5139, PETRI_PLACES=317, PETRI_TRANSITIONS=458} [2024-06-03 19:43:34,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-03 19:43:34,344 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 458 transitions, 5139 flow [2024-06-03 19:43:34,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:34,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:34,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:34,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:43:34,344 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)] === [2024-06-03 19:43:34,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:34,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1838155048, now seen corresponding path program 1 times [2024-06-03 19:43:34,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:34,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631120514] [2024-06-03 19:43:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:34,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:35,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:35,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631120514] [2024-06-03 19:43:35,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631120514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:35,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:35,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816393686] [2024-06-03 19:43:35,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:35,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:35,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:35,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:35,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:43:35,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 458 transitions, 5139 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:35,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:35,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:43:35,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:36,656 INFO L124 PetriNetUnfolderBase]: 2670/4394 cut-off events. [2024-06-03 19:43:36,657 INFO L125 PetriNetUnfolderBase]: For 734320/734320 co-relation queries the response was YES. [2024-06-03 19:43:36,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43940 conditions, 4394 events. 2670/4394 cut-off events. For 734320/734320 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26689 event pairs, 604 based on Foata normal form. 2/4377 useless extension candidates. Maximal degree in co-relation 43795. Up to 3858 conditions per place. [2024-06-03 19:43:36,714 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 428 selfloop transitions, 16 changer transitions 0/481 dead transitions. [2024-06-03 19:43:36,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 481 transitions, 6181 flow [2024-06-03 19:43:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:43:36,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-03 19:43:36,715 INFO L175 Difference]: Start difference. First operand has 317 places, 458 transitions, 5139 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:43:36,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 481 transitions, 6181 flow [2024-06-03 19:43:38,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 481 transitions, 5935 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 19:43:38,426 INFO L231 Difference]: Finished difference. Result has 315 places, 460 transitions, 5012 flow [2024-06-03 19:43:38,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4893, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5012, PETRI_PLACES=315, PETRI_TRANSITIONS=460} [2024-06-03 19:43:38,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-03 19:43:38,427 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 460 transitions, 5012 flow [2024-06-03 19:43:38,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:38,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:38,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:38,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:43:38,427 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)] === [2024-06-03 19:43:38,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2094942398, now seen corresponding path program 2 times [2024-06-03 19:43:38,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:38,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018301798] [2024-06-03 19:43:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:38,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:39,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:39,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018301798] [2024-06-03 19:43:39,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018301798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:39,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:39,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:39,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344555898] [2024-06-03 19:43:39,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:39,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:39,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:39,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:39,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:39,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:43:39,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 460 transitions, 5012 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:39,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:39,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:43:39,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:40,646 INFO L124 PetriNetUnfolderBase]: 2678/4406 cut-off events. [2024-06-03 19:43:40,646 INFO L125 PetriNetUnfolderBase]: For 743924/743924 co-relation queries the response was YES. [2024-06-03 19:43:40,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43731 conditions, 4406 events. 2678/4406 cut-off events. For 743924/743924 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26823 event pairs, 640 based on Foata normal form. 2/4389 useless extension candidates. Maximal degree in co-relation 43586. Up to 3887 conditions per place. [2024-06-03 19:43:40,704 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 425 selfloop transitions, 17 changer transitions 0/479 dead transitions. [2024-06-03 19:43:40,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 479 transitions, 6038 flow [2024-06-03 19:43:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:43:40,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:43:40,705 INFO L175 Difference]: Start difference. First operand has 315 places, 460 transitions, 5012 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:43:40,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 479 transitions, 6038 flow [2024-06-03 19:43:43,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 479 transitions, 5935 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-03 19:43:43,420 INFO L231 Difference]: Finished difference. Result has 317 places, 462 transitions, 5034 flow [2024-06-03 19:43:43,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5034, PETRI_PLACES=317, PETRI_TRANSITIONS=462} [2024-06-03 19:43:43,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-03 19:43:43,421 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 462 transitions, 5034 flow [2024-06-03 19:43:43,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:43,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:43,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:43,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:43:43,421 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)] === [2024-06-03 19:43:43,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:43,421 INFO L85 PathProgramCache]: Analyzing trace with hash -921949266, now seen corresponding path program 1 times [2024-06-03 19:43:43,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:43,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382600400] [2024-06-03 19:43:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:43,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:44,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:44,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382600400] [2024-06-03 19:43:44,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382600400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:44,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:44,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:43:44,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366980548] [2024-06-03 19:43:44,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:44,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:43:44,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:44,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:43:44,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:43:44,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:43:44,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 462 transitions, 5034 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:44,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:44,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:43:44,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:45,647 INFO L124 PetriNetUnfolderBase]: 2744/4474 cut-off events. [2024-06-03 19:43:45,647 INFO L125 PetriNetUnfolderBase]: For 747540/747540 co-relation queries the response was YES. [2024-06-03 19:43:45,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43872 conditions, 4474 events. 2744/4474 cut-off events. For 747540/747540 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26858 event pairs, 668 based on Foata normal form. 2/4461 useless extension candidates. Maximal degree in co-relation 43726. Up to 4087 conditions per place. [2024-06-03 19:43:45,706 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 449 selfloop transitions, 22 changer transitions 0/482 dead transitions. [2024-06-03 19:43:45,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 482 transitions, 6138 flow [2024-06-03 19:43:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-03 19:43:45,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-03 19:43:45,707 INFO L175 Difference]: Start difference. First operand has 317 places, 462 transitions, 5034 flow. Second operand 10 states and 174 transitions. [2024-06-03 19:43:45,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 482 transitions, 6138 flow [2024-06-03 19:43:48,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 482 transitions, 6029 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:43:48,316 INFO L231 Difference]: Finished difference. Result has 321 places, 465 transitions, 5083 flow [2024-06-03 19:43:48,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4925, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5083, PETRI_PLACES=321, PETRI_TRANSITIONS=465} [2024-06-03 19:43:48,317 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-03 19:43:48,317 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 465 transitions, 5083 flow [2024-06-03 19:43:48,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:48,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:48,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:48,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:43:48,317 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)] === [2024-06-03 19:43:48,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:48,318 INFO L85 PathProgramCache]: Analyzing trace with hash -806663056, now seen corresponding path program 3 times [2024-06-03 19:43:48,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:48,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764078654] [2024-06-03 19:43:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:48,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:49,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:49,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764078654] [2024-06-03 19:43:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764078654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:49,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:49,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:49,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831940935] [2024-06-03 19:43:49,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:49,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:49,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:49,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:49,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:49,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:43:49,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 465 transitions, 5083 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:49,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:49,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:43:49,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:50,739 INFO L124 PetriNetUnfolderBase]: 2680/4410 cut-off events. [2024-06-03 19:43:50,739 INFO L125 PetriNetUnfolderBase]: For 766320/766320 co-relation queries the response was YES. [2024-06-03 19:43:50,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44017 conditions, 4410 events. 2680/4410 cut-off events. For 766320/766320 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26803 event pairs, 634 based on Foata normal form. 2/4389 useless extension candidates. Maximal degree in co-relation 43870. Up to 3898 conditions per place. [2024-06-03 19:43:50,801 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 430 selfloop transitions, 17 changer transitions 0/484 dead transitions. [2024-06-03 19:43:50,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 484 transitions, 6135 flow [2024-06-03 19:43:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:43:50,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:43:50,802 INFO L175 Difference]: Start difference. First operand has 321 places, 465 transitions, 5083 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:43:50,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 484 transitions, 6135 flow [2024-06-03 19:43:53,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 484 transitions, 5999 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-03 19:43:53,080 INFO L231 Difference]: Finished difference. Result has 322 places, 470 transitions, 5108 flow [2024-06-03 19:43:53,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4947, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5108, PETRI_PLACES=322, PETRI_TRANSITIONS=470} [2024-06-03 19:43:53,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-03 19:43:53,080 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 470 transitions, 5108 flow [2024-06-03 19:43:53,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:53,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:53,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:53,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:43:53,081 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)] === [2024-06-03 19:43:53,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash -641023922, now seen corresponding path program 4 times [2024-06-03 19:43:53,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:53,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839260763] [2024-06-03 19:43:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:53,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:54,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:54,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839260763] [2024-06-03 19:43:54,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839260763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:54,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:54,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:54,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087884249] [2024-06-03 19:43:54,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:54,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:54,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:54,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:54,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:54,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:43:54,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 470 transitions, 5108 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:54,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:54,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:43:54,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:55,298 INFO L124 PetriNetUnfolderBase]: 2675/4404 cut-off events. [2024-06-03 19:43:55,298 INFO L125 PetriNetUnfolderBase]: For 771446/771448 co-relation queries the response was YES. [2024-06-03 19:43:55,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44090 conditions, 4404 events. 2675/4404 cut-off events. For 771446/771448 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26798 event pairs, 633 based on Foata normal form. 4/4381 useless extension candidates. Maximal degree in co-relation 43941. Up to 3882 conditions per place. [2024-06-03 19:43:55,360 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 425 selfloop transitions, 24 changer transitions 0/486 dead transitions. [2024-06-03 19:43:55,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 486 transitions, 6155 flow [2024-06-03 19:43:55,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:43:55,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:43:55,361 INFO L175 Difference]: Start difference. First operand has 322 places, 470 transitions, 5108 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:43:55,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 486 transitions, 6155 flow [2024-06-03 19:43:58,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 486 transitions, 6040 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:58,214 INFO L231 Difference]: Finished difference. Result has 326 places, 475 transitions, 5173 flow [2024-06-03 19:43:58,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4993, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5173, PETRI_PLACES=326, PETRI_TRANSITIONS=475} [2024-06-03 19:43:58,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-03 19:43:58,214 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 475 transitions, 5173 flow [2024-06-03 19:43:58,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:58,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:58,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:58,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:43:58,215 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)] === [2024-06-03 19:43:58,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:58,215 INFO L85 PathProgramCache]: Analyzing trace with hash 955049418, now seen corresponding path program 1 times [2024-06-03 19:43:58,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:58,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102934512] [2024-06-03 19:43:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:58,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:59,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:59,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102934512] [2024-06-03 19:43:59,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102934512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:59,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:59,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:43:59,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266597755] [2024-06-03 19:43:59,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:59,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:43:59,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:43:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:43:59,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:43:59,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 475 transitions, 5173 flow. Second operand has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:59,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:59,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:43:59,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:00,782 INFO L124 PetriNetUnfolderBase]: 2647/4325 cut-off events. [2024-06-03 19:44:00,782 INFO L125 PetriNetUnfolderBase]: For 771894/771912 co-relation queries the response was YES. [2024-06-03 19:44:00,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43401 conditions, 4325 events. 2647/4325 cut-off events. For 771894/771912 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 25981 event pairs, 656 based on Foata normal form. 2/4277 useless extension candidates. Maximal degree in co-relation 43250. Up to 3853 conditions per place. [2024-06-03 19:44:00,846 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 407 selfloop transitions, 23 changer transitions 0/490 dead transitions. [2024-06-03 19:44:00,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 490 transitions, 6151 flow [2024-06-03 19:44:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:44:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:44:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-03 19:44:00,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-03 19:44:00,847 INFO L175 Difference]: Start difference. First operand has 326 places, 475 transitions, 5173 flow. Second operand 10 states and 171 transitions. [2024-06-03 19:44:00,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 490 transitions, 6151 flow [2024-06-03 19:44:03,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 490 transitions, 6016 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:03,179 INFO L231 Difference]: Finished difference. Result has 331 places, 477 transitions, 5175 flow [2024-06-03 19:44:03,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5175, PETRI_PLACES=331, PETRI_TRANSITIONS=477} [2024-06-03 19:44:03,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-03 19:44:03,179 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 477 transitions, 5175 flow [2024-06-03 19:44:03,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:03,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:03,180 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] [2024-06-03 19:44:03,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:44:03,180 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)] === [2024-06-03 19:44:03,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:03,181 INFO L85 PathProgramCache]: Analyzing trace with hash -194811404, now seen corresponding path program 1 times [2024-06-03 19:44:03,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:03,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696696254] [2024-06-03 19:44:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:03,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:04,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:04,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696696254] [2024-06-03 19:44:04,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696696254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:04,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:04,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:04,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458079690] [2024-06-03 19:44:04,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:04,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:04,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:04,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:44:04,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 477 transitions, 5175 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:04,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:04,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:44:04,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:05,655 INFO L124 PetriNetUnfolderBase]: 2805/4553 cut-off events. [2024-06-03 19:44:05,655 INFO L125 PetriNetUnfolderBase]: For 787892/787894 co-relation queries the response was YES. [2024-06-03 19:44:05,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45347 conditions, 4553 events. 2805/4553 cut-off events. For 787892/787894 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27268 event pairs, 618 based on Foata normal form. 3/4543 useless extension candidates. Maximal degree in co-relation 45195. Up to 4003 conditions per place. [2024-06-03 19:44:05,718 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 59 changer transitions 0/507 dead transitions. [2024-06-03 19:44:05,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 507 transitions, 6373 flow [2024-06-03 19:44:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:44:05,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:44:05,720 INFO L175 Difference]: Start difference. First operand has 331 places, 477 transitions, 5175 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:44:05,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 507 transitions, 6373 flow [2024-06-03 19:44:08,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 507 transitions, 6252 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-03 19:44:08,499 INFO L231 Difference]: Finished difference. Result has 332 places, 480 transitions, 5330 flow [2024-06-03 19:44:08,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5054, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5330, PETRI_PLACES=332, PETRI_TRANSITIONS=480} [2024-06-03 19:44:08,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-03 19:44:08,500 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 480 transitions, 5330 flow [2024-06-03 19:44:08,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:08,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:08,500 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] [2024-06-03 19:44:08,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:44:08,501 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)] === [2024-06-03 19:44:08,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash 664777928, now seen corresponding path program 1 times [2024-06-03 19:44:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:08,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392245229] [2024-06-03 19:44:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:09,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:09,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392245229] [2024-06-03 19:44:09,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392245229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:09,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:09,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:09,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305646581] [2024-06-03 19:44:09,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:09,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:09,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:09,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:09,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:09,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 480 transitions, 5330 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:09,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:09,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:09,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:10,764 INFO L124 PetriNetUnfolderBase]: 2887/4639 cut-off events. [2024-06-03 19:44:10,764 INFO L125 PetriNetUnfolderBase]: For 810536/810538 co-relation queries the response was YES. [2024-06-03 19:44:10,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46419 conditions, 4639 events. 2887/4639 cut-off events. For 810536/810538 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27353 event pairs, 644 based on Foata normal form. 4/4642 useless extension candidates. Maximal degree in co-relation 46266. Up to 4191 conditions per place. [2024-06-03 19:44:10,831 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 430 selfloop transitions, 74 changer transitions 0/509 dead transitions. [2024-06-03 19:44:10,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 509 transitions, 6554 flow [2024-06-03 19:44:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:44:10,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:44:10,832 INFO L175 Difference]: Start difference. First operand has 332 places, 480 transitions, 5330 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:44:10,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 509 transitions, 6554 flow [2024-06-03 19:44:13,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 509 transitions, 6288 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:13,137 INFO L231 Difference]: Finished difference. Result has 334 places, 483 transitions, 5343 flow [2024-06-03 19:44:13,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5343, PETRI_PLACES=334, PETRI_TRANSITIONS=483} [2024-06-03 19:44:13,138 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-03 19:44:13,138 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 483 transitions, 5343 flow [2024-06-03 19:44:13,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:13,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:13,138 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] [2024-06-03 19:44:13,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:44:13,139 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)] === [2024-06-03 19:44:13,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash 842146598, now seen corresponding path program 2 times [2024-06-03 19:44:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908149026] [2024-06-03 19:44:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:14,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:14,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908149026] [2024-06-03 19:44:14,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908149026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:14,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:14,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:14,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906214489] [2024-06-03 19:44:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:14,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:14,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:14,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:14,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 483 transitions, 5343 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:14,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:14,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:14,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:15,401 INFO L124 PetriNetUnfolderBase]: 2918/4686 cut-off events. [2024-06-03 19:44:15,402 INFO L125 PetriNetUnfolderBase]: For 844268/844270 co-relation queries the response was YES. [2024-06-03 19:44:15,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47643 conditions, 4686 events. 2918/4686 cut-off events. For 844268/844270 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27646 event pairs, 596 based on Foata normal form. 4/4689 useless extension candidates. Maximal degree in co-relation 47489. Up to 4130 conditions per place. [2024-06-03 19:44:15,463 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 403 selfloop transitions, 113 changer transitions 0/521 dead transitions. [2024-06-03 19:44:15,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 521 transitions, 6956 flow [2024-06-03 19:44:15,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:44:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:44:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-03 19:44:15,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-03 19:44:15,464 INFO L175 Difference]: Start difference. First operand has 334 places, 483 transitions, 5343 flow. Second operand 10 states and 183 transitions. [2024-06-03 19:44:15,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 521 transitions, 6956 flow [2024-06-03 19:44:18,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 521 transitions, 6709 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:18,114 INFO L231 Difference]: Finished difference. Result has 338 places, 492 transitions, 5632 flow [2024-06-03 19:44:18,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5096, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5632, PETRI_PLACES=338, PETRI_TRANSITIONS=492} [2024-06-03 19:44:18,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-03 19:44:18,115 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 492 transitions, 5632 flow [2024-06-03 19:44:18,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:18,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:18,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:18,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:44:18,115 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)] === [2024-06-03 19:44:18,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash 841909448, now seen corresponding path program 3 times [2024-06-03 19:44:18,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:18,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440318019] [2024-06-03 19:44:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:18,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:19,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:19,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440318019] [2024-06-03 19:44:19,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440318019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:19,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:19,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17666636] [2024-06-03 19:44:19,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:19,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:19,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:19,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 492 transitions, 5632 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:19,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:19,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:19,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:20,475 INFO L124 PetriNetUnfolderBase]: 2912/4680 cut-off events. [2024-06-03 19:44:20,475 INFO L125 PetriNetUnfolderBase]: For 855692/855694 co-relation queries the response was YES. [2024-06-03 19:44:20,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47898 conditions, 4680 events. 2912/4680 cut-off events. For 855692/855694 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27661 event pairs, 598 based on Foata normal form. 4/4683 useless extension candidates. Maximal degree in co-relation 47742. Up to 4125 conditions per place. [2024-06-03 19:44:20,536 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 408 selfloop transitions, 107 changer transitions 0/520 dead transitions. [2024-06-03 19:44:20,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 520 transitions, 6774 flow [2024-06-03 19:44:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:44:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:44:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-03 19:44:20,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-03 19:44:20,537 INFO L175 Difference]: Start difference. First operand has 338 places, 492 transitions, 5632 flow. Second operand 10 states and 183 transitions. [2024-06-03 19:44:20,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 520 transitions, 6774 flow [2024-06-03 19:44:23,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 520 transitions, 6434 flow, removed 107 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:23,596 INFO L231 Difference]: Finished difference. Result has 342 places, 492 transitions, 5517 flow [2024-06-03 19:44:23,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5292, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5517, PETRI_PLACES=342, PETRI_TRANSITIONS=492} [2024-06-03 19:44:23,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-03 19:44:23,597 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 492 transitions, 5517 flow [2024-06-03 19:44:23,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:23,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:23,597 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] [2024-06-03 19:44:23,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:44:23,597 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)] === [2024-06-03 19:44:23,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash -56167934, now seen corresponding path program 2 times [2024-06-03 19:44:23,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:23,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781206964] [2024-06-03 19:44:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:23,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:24,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:24,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781206964] [2024-06-03 19:44:24,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781206964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:24,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:24,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:24,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420689045] [2024-06-03 19:44:24,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:24,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:24,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:24,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:24,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:24,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:44:24,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 492 transitions, 5517 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:24,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:24,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:44:24,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:25,930 INFO L124 PetriNetUnfolderBase]: 2854/4629 cut-off events. [2024-06-03 19:44:25,931 INFO L125 PetriNetUnfolderBase]: For 866988/866988 co-relation queries the response was YES. [2024-06-03 19:44:25,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47869 conditions, 4629 events. 2854/4629 cut-off events. For 866988/866988 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 27773 event pairs, 587 based on Foata normal form. 1/4616 useless extension candidates. Maximal degree in co-relation 47711. Up to 3893 conditions per place. [2024-06-03 19:44:25,999 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 402 selfloop transitions, 87 changer transitions 0/524 dead transitions. [2024-06-03 19:44:26,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 524 transitions, 6784 flow [2024-06-03 19:44:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:44:26,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-03 19:44:26,001 INFO L175 Difference]: Start difference. First operand has 342 places, 492 transitions, 5517 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:44:26,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 524 transitions, 6784 flow [2024-06-03 19:44:28,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 524 transitions, 6603 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:28,584 INFO L231 Difference]: Finished difference. Result has 344 places, 498 transitions, 5710 flow [2024-06-03 19:44:28,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5710, PETRI_PLACES=344, PETRI_TRANSITIONS=498} [2024-06-03 19:44:28,584 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-03 19:44:28,584 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 498 transitions, 5710 flow [2024-06-03 19:44:28,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:28,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:28,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:28,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:44:28,585 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)] === [2024-06-03 19:44:28,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1020185698, now seen corresponding path program 4 times [2024-06-03 19:44:28,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:28,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698185743] [2024-06-03 19:44:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:28,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:29,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:29,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698185743] [2024-06-03 19:44:29,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698185743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:29,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:29,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:29,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446607750] [2024-06-03 19:44:29,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:29,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:29,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:29,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:29,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:29,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 498 transitions, 5710 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:29,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:29,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:29,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:30,921 INFO L124 PetriNetUnfolderBase]: 2938/4718 cut-off events. [2024-06-03 19:44:30,922 INFO L125 PetriNetUnfolderBase]: For 893366/893368 co-relation queries the response was YES. [2024-06-03 19:44:30,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48973 conditions, 4718 events. 2938/4718 cut-off events. For 893366/893368 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 27939 event pairs, 651 based on Foata normal form. 4/4721 useless extension candidates. Maximal degree in co-relation 48814. Up to 4236 conditions per place. [2024-06-03 19:44:30,981 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 442 selfloop transitions, 79 changer transitions 0/526 dead transitions. [2024-06-03 19:44:30,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 526 transitions, 6985 flow [2024-06-03 19:44:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:44:30,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:44:30,982 INFO L175 Difference]: Start difference. First operand has 344 places, 498 transitions, 5710 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:44:30,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 526 transitions, 6985 flow [2024-06-03 19:44:33,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 526 transitions, 6663 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:33,740 INFO L231 Difference]: Finished difference. Result has 347 places, 501 transitions, 5688 flow [2024-06-03 19:44:33,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5388, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5688, PETRI_PLACES=347, PETRI_TRANSITIONS=501} [2024-06-03 19:44:33,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-03 19:44:33,741 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 501 transitions, 5688 flow [2024-06-03 19:44:33,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:33,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:33,741 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] [2024-06-03 19:44:33,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:44:33,741 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)] === [2024-06-03 19:44:33,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:33,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1014943474, now seen corresponding path program 3 times [2024-06-03 19:44:33,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:33,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423749216] [2024-06-03 19:44:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:33,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:34,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:34,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423749216] [2024-06-03 19:44:34,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423749216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:34,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:34,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:34,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830909155] [2024-06-03 19:44:34,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:34,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:34,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:34,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:34,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:34,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:44:34,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 501 transitions, 5688 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:34,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:34,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:44:34,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:36,223 INFO L124 PetriNetUnfolderBase]: 2869/4652 cut-off events. [2024-06-03 19:44:36,223 INFO L125 PetriNetUnfolderBase]: For 911371/911371 co-relation queries the response was YES. [2024-06-03 19:44:36,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49146 conditions, 4652 events. 2869/4652 cut-off events. For 911371/911371 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 27904 event pairs, 627 based on Foata normal form. 1/4639 useless extension candidates. Maximal degree in co-relation 48986. Up to 3910 conditions per place. [2024-06-03 19:44:36,285 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 401 selfloop transitions, 93 changer transitions 0/530 dead transitions. [2024-06-03 19:44:36,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 530 transitions, 6947 flow [2024-06-03 19:44:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 19:44:36,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-03 19:44:36,287 INFO L175 Difference]: Start difference. First operand has 347 places, 501 transitions, 5688 flow. Second operand 9 states and 178 transitions. [2024-06-03 19:44:36,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 530 transitions, 6947 flow [2024-06-03 19:44:38,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 530 transitions, 6669 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:38,709 INFO L231 Difference]: Finished difference. Result has 349 places, 504 transitions, 5778 flow [2024-06-03 19:44:38,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5410, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5778, PETRI_PLACES=349, PETRI_TRANSITIONS=504} [2024-06-03 19:44:38,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-03 19:44:38,709 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 504 transitions, 5778 flow [2024-06-03 19:44:38,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:38,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:38,709 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] [2024-06-03 19:44:38,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:44:38,710 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)] === [2024-06-03 19:44:38,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:38,710 INFO L85 PathProgramCache]: Analyzing trace with hash 775640464, now seen corresponding path program 1 times [2024-06-03 19:44:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:38,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570933401] [2024-06-03 19:44:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:38,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:40,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:40,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570933401] [2024-06-03 19:44:40,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570933401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:40,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:40,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:40,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129827612] [2024-06-03 19:44:40,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:40,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:40,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:40,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:40,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 504 transitions, 5778 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:40,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:40,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:40,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:41,519 INFO L124 PetriNetUnfolderBase]: 2964/4766 cut-off events. [2024-06-03 19:44:41,519 INFO L125 PetriNetUnfolderBase]: For 931304/931306 co-relation queries the response was YES. [2024-06-03 19:44:41,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50205 conditions, 4766 events. 2964/4766 cut-off events. For 931304/931306 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 28333 event pairs, 676 based on Foata normal form. 3/4767 useless extension candidates. Maximal degree in co-relation 50044. Up to 4341 conditions per place. [2024-06-03 19:44:41,587 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 476 selfloop transitions, 53 changer transitions 0/534 dead transitions. [2024-06-03 19:44:41,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 534 transitions, 7084 flow [2024-06-03 19:44:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:44:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:44:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 19:44:41,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-03 19:44:41,588 INFO L175 Difference]: Start difference. First operand has 349 places, 504 transitions, 5778 flow. Second operand 10 states and 175 transitions. [2024-06-03 19:44:41,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 534 transitions, 7084 flow [2024-06-03 19:44:44,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 534 transitions, 6701 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-03 19:44:44,737 INFO L231 Difference]: Finished difference. Result has 352 places, 513 transitions, 5694 flow [2024-06-03 19:44:44,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5403, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5694, PETRI_PLACES=352, PETRI_TRANSITIONS=513} [2024-06-03 19:44:44,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-03 19:44:44,737 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 513 transitions, 5694 flow [2024-06-03 19:44:44,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:44,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:44,737 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] [2024-06-03 19:44:44,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:44:44,738 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)] === [2024-06-03 19:44:44,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:44,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1263489164, now seen corresponding path program 4 times [2024-06-03 19:44:44,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:44,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847943828] [2024-06-03 19:44:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:44,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:45,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847943828] [2024-06-03 19:44:45,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847943828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:45,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:45,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:45,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641848885] [2024-06-03 19:44:45,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:45,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:45,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:46,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:44:46,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 513 transitions, 5694 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:46,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:46,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:44:46,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:47,411 INFO L124 PetriNetUnfolderBase]: 2954/4802 cut-off events. [2024-06-03 19:44:47,411 INFO L125 PetriNetUnfolderBase]: For 952800/952800 co-relation queries the response was YES. [2024-06-03 19:44:47,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50529 conditions, 4802 events. 2954/4802 cut-off events. For 952800/952800 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29147 event pairs, 658 based on Foata normal form. 1/4789 useless extension candidates. Maximal degree in co-relation 50366. Up to 3988 conditions per place. [2024-06-03 19:44:47,481 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 412 selfloop transitions, 111 changer transitions 0/560 dead transitions. [2024-06-03 19:44:47,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 560 transitions, 7148 flow [2024-06-03 19:44:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:44:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:44:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:44:47,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:44:47,482 INFO L175 Difference]: Start difference. First operand has 352 places, 513 transitions, 5694 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:44:47,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 560 transitions, 7148 flow [2024-06-03 19:44:51,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 560 transitions, 6960 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:51,352 INFO L231 Difference]: Finished difference. Result has 359 places, 537 transitions, 6117 flow [2024-06-03 19:44:51,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5506, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6117, PETRI_PLACES=359, PETRI_TRANSITIONS=537} [2024-06-03 19:44:51,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-03 19:44:51,353 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 537 transitions, 6117 flow [2024-06-03 19:44:51,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:51,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:51,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:51,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:44:51,353 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)] === [2024-06-03 19:44:51,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:51,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1010931268, now seen corresponding path program 5 times [2024-06-03 19:44:51,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:51,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492594555] [2024-06-03 19:44:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:51,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:52,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:52,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492594555] [2024-06-03 19:44:52,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492594555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:52,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:52,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:52,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377279454] [2024-06-03 19:44:52,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:52,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:52,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:52,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:52,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:52,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:52,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 537 transitions, 6117 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:52,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:52,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:52,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:53,959 INFO L124 PetriNetUnfolderBase]: 3054/4916 cut-off events. [2024-06-03 19:44:53,959 INFO L125 PetriNetUnfolderBase]: For 996553/996555 co-relation queries the response was YES. [2024-06-03 19:44:54,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52478 conditions, 4916 events. 3054/4916 cut-off events. For 996553/996555 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 29375 event pairs, 647 based on Foata normal form. 4/4919 useless extension candidates. Maximal degree in co-relation 52312. Up to 4232 conditions per place. [2024-06-03 19:44:54,029 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 444 selfloop transitions, 118 changer transitions 0/567 dead transitions. [2024-06-03 19:44:54,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 567 transitions, 7852 flow [2024-06-03 19:44:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:44:54,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:44:54,030 INFO L175 Difference]: Start difference. First operand has 359 places, 537 transitions, 6117 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:44:54,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 567 transitions, 7852 flow [2024-06-03 19:44:57,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 567 transitions, 7556 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:57,017 INFO L231 Difference]: Finished difference. Result has 364 places, 543 transitions, 6365 flow [2024-06-03 19:44:57,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6365, PETRI_PLACES=364, PETRI_TRANSITIONS=543} [2024-06-03 19:44:57,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-03 19:44:57,018 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 543 transitions, 6365 flow [2024-06-03 19:44:57,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:57,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:57,018 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] [2024-06-03 19:44:57,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:44:57,018 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)] === [2024-06-03 19:44:57,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:57,019 INFO L85 PathProgramCache]: Analyzing trace with hash -46897105, now seen corresponding path program 1 times [2024-06-03 19:44:57,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:57,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876209644] [2024-06-03 19:44:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:57,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:58,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:58,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876209644] [2024-06-03 19:44:58,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876209644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:58,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:58,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:58,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034720291] [2024-06-03 19:44:58,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:58,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:58,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:58,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:58,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:58,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 543 transitions, 6365 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:58,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:58,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:58,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:59,473 INFO L124 PetriNetUnfolderBase]: 3064/4931 cut-off events. [2024-06-03 19:44:59,473 INFO L125 PetriNetUnfolderBase]: For 1022106/1022110 co-relation queries the response was YES. [2024-06-03 19:44:59,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53129 conditions, 4931 events. 3064/4931 cut-off events. For 1022106/1022110 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29508 event pairs, 619 based on Foata normal form. 6/4936 useless extension candidates. Maximal degree in co-relation 52962. Up to 4475 conditions per place. [2024-06-03 19:44:59,541 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 504 selfloop transitions, 60 changer transitions 0/569 dead transitions. [2024-06-03 19:44:59,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 569 transitions, 7698 flow [2024-06-03 19:44:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:44:59,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:44:59,542 INFO L175 Difference]: Start difference. First operand has 364 places, 543 transitions, 6365 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:44:59,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 569 transitions, 7698 flow [2024-06-03 19:45:02,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 569 transitions, 7388 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:02,924 INFO L231 Difference]: Finished difference. Result has 368 places, 546 transitions, 6297 flow [2024-06-03 19:45:02,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6055, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6297, PETRI_PLACES=368, PETRI_TRANSITIONS=546} [2024-06-03 19:45:02,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-03 19:45:02,925 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 546 transitions, 6297 flow [2024-06-03 19:45:02,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:02,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:02,925 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] [2024-06-03 19:45:02,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:45:02,926 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)] === [2024-06-03 19:45:02,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash -46897508, now seen corresponding path program 6 times [2024-06-03 19:45:02,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:02,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227064797] [2024-06-03 19:45:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:02,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:03,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:03,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227064797] [2024-06-03 19:45:03,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227064797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:03,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:03,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:03,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417403002] [2024-06-03 19:45:03,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:03,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:04,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:04,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 546 transitions, 6297 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:04,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:04,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:04,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:05,417 INFO L124 PetriNetUnfolderBase]: 3058/4922 cut-off events. [2024-06-03 19:45:05,417 INFO L125 PetriNetUnfolderBase]: For 1011435/1011437 co-relation queries the response was YES. [2024-06-03 19:45:05,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53143 conditions, 4922 events. 3058/4922 cut-off events. For 1011435/1011437 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29398 event pairs, 638 based on Foata normal form. 4/4925 useless extension candidates. Maximal degree in co-relation 52974. Up to 4241 conditions per place. [2024-06-03 19:45:05,486 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 439 selfloop transitions, 125 changer transitions 0/569 dead transitions. [2024-06-03 19:45:05,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 569 transitions, 7522 flow [2024-06-03 19:45:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:45:05,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:45:05,487 INFO L175 Difference]: Start difference. First operand has 368 places, 546 transitions, 6297 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:45:05,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 569 transitions, 7522 flow [2024-06-03 19:45:09,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 569 transitions, 7206 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-03 19:45:09,259 INFO L231 Difference]: Finished difference. Result has 370 places, 546 transitions, 6239 flow [2024-06-03 19:45:09,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5981, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6239, PETRI_PLACES=370, PETRI_TRANSITIONS=546} [2024-06-03 19:45:09,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-03 19:45:09,259 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 546 transitions, 6239 flow [2024-06-03 19:45:09,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:09,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:09,260 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] [2024-06-03 19:45:09,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:45:09,260 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)] === [2024-06-03 19:45:09,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:09,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1156443996, now seen corresponding path program 7 times [2024-06-03 19:45:09,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:09,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674381934] [2024-06-03 19:45:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:09,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:10,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:10,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674381934] [2024-06-03 19:45:10,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674381934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:10,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:10,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:10,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604597522] [2024-06-03 19:45:10,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:10,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:10,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:10,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:10,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:10,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 546 transitions, 6239 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:10,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:10,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:10,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:11,883 INFO L124 PetriNetUnfolderBase]: 3073/4944 cut-off events. [2024-06-03 19:45:11,883 INFO L125 PetriNetUnfolderBase]: For 1027934/1027934 co-relation queries the response was YES. [2024-06-03 19:45:11,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53549 conditions, 4944 events. 3073/4944 cut-off events. For 1027934/1027934 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29536 event pairs, 616 based on Foata normal form. 2/4945 useless extension candidates. Maximal degree in co-relation 53379. Up to 4495 conditions per place. [2024-06-03 19:45:11,954 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 491 selfloop transitions, 73 changer transitions 0/569 dead transitions. [2024-06-03 19:45:11,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 569 transitions, 7614 flow [2024-06-03 19:45:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:45:11,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-03 19:45:11,955 INFO L175 Difference]: Start difference. First operand has 370 places, 546 transitions, 6239 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:45:11,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 569 transitions, 7614 flow [2024-06-03 19:45:14,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 569 transitions, 7349 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 19:45:14,779 INFO L231 Difference]: Finished difference. Result has 371 places, 552 transitions, 6319 flow [2024-06-03 19:45:14,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5974, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6319, PETRI_PLACES=371, PETRI_TRANSITIONS=552} [2024-06-03 19:45:14,780 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-03 19:45:14,780 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 552 transitions, 6319 flow [2024-06-03 19:45:14,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:14,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:14,780 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] [2024-06-03 19:45:14,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:45:14,780 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)] === [2024-06-03 19:45:14,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1156563966, now seen corresponding path program 8 times [2024-06-03 19:45:14,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:14,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415373825] [2024-06-03 19:45:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:14,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:15,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:15,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415373825] [2024-06-03 19:45:15,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415373825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:15,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:15,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:15,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42417488] [2024-06-03 19:45:15,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:15,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:15,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:15,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:15,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:15,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:15,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 552 transitions, 6319 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:15,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:15,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:15,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:17,222 INFO L124 PetriNetUnfolderBase]: 3115/5013 cut-off events. [2024-06-03 19:45:17,222 INFO L125 PetriNetUnfolderBase]: For 1084619/1084621 co-relation queries the response was YES. [2024-06-03 19:45:17,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55391 conditions, 5013 events. 3115/5013 cut-off events. For 1084619/1084621 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 30023 event pairs, 652 based on Foata normal form. 4/5016 useless extension candidates. Maximal degree in co-relation 55220. Up to 4032 conditions per place. [2024-06-03 19:45:17,294 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 372 selfloop transitions, 206 changer transitions 0/583 dead transitions. [2024-06-03 19:45:17,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 583 transitions, 8497 flow [2024-06-03 19:45:17,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:17,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:45:17,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:45:17,295 INFO L175 Difference]: Start difference. First operand has 371 places, 552 transitions, 6319 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:45:17,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 583 transitions, 8497 flow [2024-06-03 19:45:20,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 583 transitions, 8154 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-03 19:45:20,757 INFO L231 Difference]: Finished difference. Result has 373 places, 561 transitions, 6886 flow [2024-06-03 19:45:20,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6886, PETRI_PLACES=373, PETRI_TRANSITIONS=561} [2024-06-03 19:45:20,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-03 19:45:20,758 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 561 transitions, 6886 flow [2024-06-03 19:45:20,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:20,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:20,758 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] [2024-06-03 19:45:20,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:45:20,759 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)] === [2024-06-03 19:45:20,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:20,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1149201156, now seen corresponding path program 9 times [2024-06-03 19:45:20,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:20,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781404294] [2024-06-03 19:45:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:21,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:21,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781404294] [2024-06-03 19:45:21,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781404294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:21,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:21,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:21,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481338651] [2024-06-03 19:45:21,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:21,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:21,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:21,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:21,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:21,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:21,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 561 transitions, 6886 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:21,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:21,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:21,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:23,244 INFO L124 PetriNetUnfolderBase]: 3157/5079 cut-off events. [2024-06-03 19:45:23,244 INFO L125 PetriNetUnfolderBase]: For 1144482/1144484 co-relation queries the response was YES. [2024-06-03 19:45:23,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57654 conditions, 5079 events. 3157/5079 cut-off events. For 1144482/1144484 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 30514 event pairs, 634 based on Foata normal form. 4/5082 useless extension candidates. Maximal degree in co-relation 57483. Up to 4072 conditions per place. [2024-06-03 19:45:23,317 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 395 selfloop transitions, 193 changer transitions 0/593 dead transitions. [2024-06-03 19:45:23,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 593 transitions, 9334 flow [2024-06-03 19:45:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:45:23,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:45:23,318 INFO L175 Difference]: Start difference. First operand has 373 places, 561 transitions, 6886 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:45:23,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 593 transitions, 9334 flow [2024-06-03 19:45:26,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 593 transitions, 8872 flow, removed 141 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:26,307 INFO L231 Difference]: Finished difference. Result has 378 places, 570 transitions, 7320 flow [2024-06-03 19:45:26,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6484, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7320, PETRI_PLACES=378, PETRI_TRANSITIONS=570} [2024-06-03 19:45:26,307 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-03 19:45:26,308 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 570 transitions, 7320 flow [2024-06-03 19:45:26,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:26,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:26,308 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] [2024-06-03 19:45:26,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:45:26,308 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)] === [2024-06-03 19:45:26,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1156831279, now seen corresponding path program 2 times [2024-06-03 19:45:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:26,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706129559] [2024-06-03 19:45:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:26,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:27,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:27,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706129559] [2024-06-03 19:45:27,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706129559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:27,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:27,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:27,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535092057] [2024-06-03 19:45:27,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:27,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:27,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:27,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:27,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 570 transitions, 7320 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:27,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:27,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:27,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:28,686 INFO L124 PetriNetUnfolderBase]: 3183/5113 cut-off events. [2024-06-03 19:45:28,686 INFO L125 PetriNetUnfolderBase]: For 1152615/1152619 co-relation queries the response was YES. [2024-06-03 19:45:28,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57767 conditions, 5113 events. 3183/5113 cut-off events. For 1152615/1152619 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30704 event pairs, 626 based on Foata normal form. 6/5118 useless extension candidates. Maximal degree in co-relation 57594. Up to 4532 conditions per place. [2024-06-03 19:45:28,765 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 497 selfloop transitions, 97 changer transitions 0/599 dead transitions. [2024-06-03 19:45:28,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 599 transitions, 9063 flow [2024-06-03 19:45:28,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:45:28,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:45:28,766 INFO L175 Difference]: Start difference. First operand has 378 places, 570 transitions, 7320 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:45:28,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 599 transitions, 9063 flow [2024-06-03 19:45:33,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 599 transitions, 8677 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:33,105 INFO L231 Difference]: Finished difference. Result has 384 places, 578 transitions, 7400 flow [2024-06-03 19:45:33,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6934, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7400, PETRI_PLACES=384, PETRI_TRANSITIONS=578} [2024-06-03 19:45:33,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-03 19:45:33,105 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 578 transitions, 7400 flow [2024-06-03 19:45:33,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:33,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:33,105 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] [2024-06-03 19:45:33,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:45:33,106 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)] === [2024-06-03 19:45:33,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:33,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1156564369, now seen corresponding path program 3 times [2024-06-03 19:45:33,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:33,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375310371] [2024-06-03 19:45:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:33,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:34,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:34,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375310371] [2024-06-03 19:45:34,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375310371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:34,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:34,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:34,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368333634] [2024-06-03 19:45:34,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:34,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:34,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:34,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:34,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:34,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:34,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 578 transitions, 7400 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:34,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:34,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:34,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:35,536 INFO L124 PetriNetUnfolderBase]: 3193/5129 cut-off events. [2024-06-03 19:45:35,537 INFO L125 PetriNetUnfolderBase]: For 1173804/1173808 co-relation queries the response was YES. [2024-06-03 19:45:35,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58021 conditions, 5129 events. 3193/5129 cut-off events. For 1173804/1173808 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 30873 event pairs, 668 based on Foata normal form. 6/5134 useless extension candidates. Maximal degree in co-relation 57846. Up to 4542 conditions per place. [2024-06-03 19:45:35,622 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 502 selfloop transitions, 95 changer transitions 0/602 dead transitions. [2024-06-03 19:45:35,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 602 transitions, 9033 flow [2024-06-03 19:45:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:45:35,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:45:35,623 INFO L175 Difference]: Start difference. First operand has 384 places, 578 transitions, 7400 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:45:35,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 602 transitions, 9033 flow [2024-06-03 19:45:39,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 602 transitions, 8758 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:39,633 INFO L231 Difference]: Finished difference. Result has 388 places, 581 transitions, 7444 flow [2024-06-03 19:45:39,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7153, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7444, PETRI_PLACES=388, PETRI_TRANSITIONS=581} [2024-06-03 19:45:39,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-03 19:45:39,633 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 581 transitions, 7444 flow [2024-06-03 19:45:39,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:39,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:39,634 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] [2024-06-03 19:45:39,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:45:39,634 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)] === [2024-06-03 19:45:39,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:39,634 INFO L85 PathProgramCache]: Analyzing trace with hash 181696636, now seen corresponding path program 10 times [2024-06-03 19:45:39,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:39,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240626930] [2024-06-03 19:45:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:39,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:40,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:40,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240626930] [2024-06-03 19:45:40,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240626930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:40,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:40,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:40,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190556282] [2024-06-03 19:45:40,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:40,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:40,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:40,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:40,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:40,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 581 transitions, 7444 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:40,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:40,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:40,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:42,270 INFO L124 PetriNetUnfolderBase]: 3187/5116 cut-off events. [2024-06-03 19:45:42,270 INFO L125 PetriNetUnfolderBase]: For 1174015/1174015 co-relation queries the response was YES. [2024-06-03 19:45:42,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57816 conditions, 5116 events. 3187/5116 cut-off events. For 1174015/1174015 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30627 event pairs, 673 based on Foata normal form. 2/5117 useless extension candidates. Maximal degree in co-relation 57639. Up to 4630 conditions per place. [2024-06-03 19:45:42,354 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 522 selfloop transitions, 76 changer transitions 0/603 dead transitions. [2024-06-03 19:45:42,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 603 transitions, 8954 flow [2024-06-03 19:45:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:45:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:45:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-03 19:45:42,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40380549682875266 [2024-06-03 19:45:42,356 INFO L175 Difference]: Start difference. First operand has 388 places, 581 transitions, 7444 flow. Second operand 11 states and 191 transitions. [2024-06-03 19:45:42,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 603 transitions, 8954 flow [2024-06-03 19:45:46,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 603 transitions, 8614 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:46,842 INFO L231 Difference]: Finished difference. Result has 393 places, 581 transitions, 7262 flow [2024-06-03 19:45:46,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7104, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7262, PETRI_PLACES=393, PETRI_TRANSITIONS=581} [2024-06-03 19:45:46,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-03 19:45:46,843 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 581 transitions, 7262 flow [2024-06-03 19:45:46,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:46,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:46,843 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] [2024-06-03 19:45:46,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:45:46,843 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)] === [2024-06-03 19:45:46,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:46,843 INFO L85 PathProgramCache]: Analyzing trace with hash 181459486, now seen corresponding path program 11 times [2024-06-03 19:45:46,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:46,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829427663] [2024-06-03 19:45:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:46,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:47,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:47,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829427663] [2024-06-03 19:45:47,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829427663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:47,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:47,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:47,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967852186] [2024-06-03 19:45:47,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:47,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:47,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:47,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:47,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:48,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:48,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 581 transitions, 7262 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:48,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:48,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:48,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:49,420 INFO L124 PetriNetUnfolderBase]: 3181/5108 cut-off events. [2024-06-03 19:45:49,421 INFO L125 PetriNetUnfolderBase]: For 1174434/1174434 co-relation queries the response was YES. [2024-06-03 19:45:49,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57316 conditions, 5108 events. 3181/5108 cut-off events. For 1174434/1174434 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30588 event pairs, 673 based on Foata normal form. 2/5109 useless extension candidates. Maximal degree in co-relation 57138. Up to 4625 conditions per place. [2024-06-03 19:45:49,505 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 519 selfloop transitions, 75 changer transitions 0/599 dead transitions. [2024-06-03 19:45:49,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 599 transitions, 8518 flow [2024-06-03 19:45:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:45:49,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 19:45:49,506 INFO L175 Difference]: Start difference. First operand has 393 places, 581 transitions, 7262 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:45:49,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 599 transitions, 8518 flow [2024-06-03 19:45:53,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 599 transitions, 8123 flow, removed 74 selfloop flow, removed 10 redundant places. [2024-06-03 19:45:53,800 INFO L231 Difference]: Finished difference. Result has 392 places, 581 transitions, 7023 flow [2024-06-03 19:45:53,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6867, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7023, PETRI_PLACES=392, PETRI_TRANSITIONS=581} [2024-06-03 19:45:53,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-03 19:45:53,801 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 581 transitions, 7023 flow [2024-06-03 19:45:53,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:53,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:53,801 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] [2024-06-03 19:45:53,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:45:53,801 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)] === [2024-06-03 19:45:53,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:53,802 INFO L85 PathProgramCache]: Analyzing trace with hash 96993425, now seen corresponding path program 4 times [2024-06-03 19:45:53,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:53,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879460190] [2024-06-03 19:45:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:53,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:54,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:54,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879460190] [2024-06-03 19:45:54,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879460190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:54,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:54,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:54,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656312022] [2024-06-03 19:45:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:54,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:54,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:54,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:54,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:54,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 581 transitions, 7023 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:54,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:54,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:54,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:56,223 INFO L124 PetriNetUnfolderBase]: 3191/5129 cut-off events. [2024-06-03 19:45:56,223 INFO L125 PetriNetUnfolderBase]: For 1190790/1190794 co-relation queries the response was YES. [2024-06-03 19:45:56,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57288 conditions, 5129 events. 3191/5129 cut-off events. For 1190790/1190794 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30853 event pairs, 681 based on Foata normal form. 6/5134 useless extension candidates. Maximal degree in co-relation 57111. Up to 4536 conditions per place. [2024-06-03 19:45:56,305 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 508 selfloop transitions, 92 changer transitions 0/605 dead transitions. [2024-06-03 19:45:56,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 605 transitions, 8643 flow [2024-06-03 19:45:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:45:56,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:45:56,306 INFO L175 Difference]: Start difference. First operand has 392 places, 581 transitions, 7023 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:45:56,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 605 transitions, 8643 flow [2024-06-03 19:46:00,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 605 transitions, 8493 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:46:00,298 INFO L231 Difference]: Finished difference. Result has 393 places, 584 transitions, 7161 flow [2024-06-03 19:46:00,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6873, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7161, PETRI_PLACES=393, PETRI_TRANSITIONS=584} [2024-06-03 19:46:00,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-03 19:46:00,299 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 584 transitions, 7161 flow [2024-06-03 19:46:00,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:00,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:00,299 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] [2024-06-03 19:46:00,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:46:00,299 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)] === [2024-06-03 19:46:00,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:00,299 INFO L85 PathProgramCache]: Analyzing trace with hash 185189716, now seen corresponding path program 12 times [2024-06-03 19:46:00,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:00,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457688671] [2024-06-03 19:46:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:01,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:01,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457688671] [2024-06-03 19:46:01,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457688671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:01,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:01,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:01,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828359294] [2024-06-03 19:46:01,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:01,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:01,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:01,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:01,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 584 transitions, 7161 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:01,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:01,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:01,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:02,737 INFO L124 PetriNetUnfolderBase]: 3185/5127 cut-off events. [2024-06-03 19:46:02,737 INFO L125 PetriNetUnfolderBase]: For 1194368/1194370 co-relation queries the response was YES. [2024-06-03 19:46:02,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57194 conditions, 5127 events. 3185/5127 cut-off events. For 1194368/1194370 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30916 event pairs, 673 based on Foata normal form. 4/5130 useless extension candidates. Maximal degree in co-relation 57016. Up to 4121 conditions per place. [2024-06-03 19:46:02,817 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 401 selfloop transitions, 199 changer transitions 0/605 dead transitions. [2024-06-03 19:46:02,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 605 transitions, 8685 flow [2024-06-03 19:46:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:46:02,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:46:02,819 INFO L175 Difference]: Start difference. First operand has 393 places, 584 transitions, 7161 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:46:02,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 605 transitions, 8685 flow [2024-06-03 19:46:07,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 605 transitions, 8358 flow, removed 96 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:07,533 INFO L231 Difference]: Finished difference. Result has 396 places, 584 transitions, 7238 flow [2024-06-03 19:46:07,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6834, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7238, PETRI_PLACES=396, PETRI_TRANSITIONS=584} [2024-06-03 19:46:07,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-03 19:46:07,534 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 584 transitions, 7238 flow [2024-06-03 19:46:07,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:07,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:07,534 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] [2024-06-03 19:46:07,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:46:07,535 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)] === [2024-06-03 19:46:07,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash -387902688, now seen corresponding path program 1 times [2024-06-03 19:46:07,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:07,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781419603] [2024-06-03 19:46:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:07,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:08,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:08,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781419603] [2024-06-03 19:46:08,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781419603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:08,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:08,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:08,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087562534] [2024-06-03 19:46:08,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:08,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:08,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:08,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:08,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:08,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:08,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 584 transitions, 7238 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:08,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:08,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:08,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:09,995 INFO L124 PetriNetUnfolderBase]: 3193/5129 cut-off events. [2024-06-03 19:46:09,996 INFO L125 PetriNetUnfolderBase]: For 1211192/1211194 co-relation queries the response was YES. [2024-06-03 19:46:10,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57563 conditions, 5129 events. 3193/5129 cut-off events. For 1211192/1211194 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 30748 event pairs, 539 based on Foata normal form. 4/5132 useless extension candidates. Maximal degree in co-relation 57384. Up to 4662 conditions per place. [2024-06-03 19:46:10,088 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 567 selfloop transitions, 41 changer transitions 0/613 dead transitions. [2024-06-03 19:46:10,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 613 transitions, 8616 flow [2024-06-03 19:46:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:46:10,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:46:10,089 INFO L175 Difference]: Start difference. First operand has 396 places, 584 transitions, 7238 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:46:10,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 613 transitions, 8616 flow [2024-06-03 19:46:15,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 613 transitions, 8309 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:15,425 INFO L231 Difference]: Finished difference. Result has 398 places, 586 transitions, 7092 flow [2024-06-03 19:46:15,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7092, PETRI_PLACES=398, PETRI_TRANSITIONS=586} [2024-06-03 19:46:15,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-03 19:46:15,426 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 586 transitions, 7092 flow [2024-06-03 19:46:15,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:15,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:15,426 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] [2024-06-03 19:46:15,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:46:15,426 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)] === [2024-06-03 19:46:15,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:15,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1668079628, now seen corresponding path program 2 times [2024-06-03 19:46:15,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:15,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55537892] [2024-06-03 19:46:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:15,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:16,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:16,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55537892] [2024-06-03 19:46:16,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55537892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:16,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:16,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:16,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562387288] [2024-06-03 19:46:16,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:16,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:16,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:16,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:16,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 586 transitions, 7092 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:16,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:16,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:16,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:17,875 INFO L124 PetriNetUnfolderBase]: 3214/5160 cut-off events. [2024-06-03 19:46:17,875 INFO L125 PetriNetUnfolderBase]: For 1243567/1243569 co-relation queries the response was YES. [2024-06-03 19:46:17,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58061 conditions, 5160 events. 3214/5160 cut-off events. For 1243567/1243569 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31018 event pairs, 679 based on Foata normal form. 4/5163 useless extension candidates. Maximal degree in co-relation 57881. Up to 4696 conditions per place. [2024-06-03 19:46:17,962 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 553 selfloop transitions, 56 changer transitions 0/614 dead transitions. [2024-06-03 19:46:17,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 614 transitions, 8778 flow [2024-06-03 19:46:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:46:17,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:46:17,963 INFO L175 Difference]: Start difference. First operand has 398 places, 586 transitions, 7092 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:46:17,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 614 transitions, 8778 flow [2024-06-03 19:46:23,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 614 transitions, 8633 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:23,325 INFO L231 Difference]: Finished difference. Result has 400 places, 590 transitions, 7216 flow [2024-06-03 19:46:23,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6947, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7216, PETRI_PLACES=400, PETRI_TRANSITIONS=590} [2024-06-03 19:46:23,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-03 19:46:23,326 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 590 transitions, 7216 flow [2024-06-03 19:46:23,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:23,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:23,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:23,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:46:23,326 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)] === [2024-06-03 19:46:23,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash 583538522, now seen corresponding path program 3 times [2024-06-03 19:46:23,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:23,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072434649] [2024-06-03 19:46:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:23,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:24,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:24,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072434649] [2024-06-03 19:46:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072434649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:24,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:24,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048635501] [2024-06-03 19:46:24,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:24,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:24,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:24,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:24,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 590 transitions, 7216 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:24,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:24,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:24,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:25,945 INFO L124 PetriNetUnfolderBase]: 3209/5153 cut-off events. [2024-06-03 19:46:25,946 INFO L125 PetriNetUnfolderBase]: For 1249418/1249420 co-relation queries the response was YES. [2024-06-03 19:46:26,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57899 conditions, 5153 events. 3209/5153 cut-off events. For 1249418/1249420 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 30978 event pairs, 680 based on Foata normal form. 4/5156 useless extension candidates. Maximal degree in co-relation 57718. Up to 4716 conditions per place. [2024-06-03 19:46:26,030 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 549 selfloop transitions, 58 changer transitions 0/612 dead transitions. [2024-06-03 19:46:26,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 612 transitions, 8504 flow [2024-06-03 19:46:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:46:26,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 19:46:26,031 INFO L175 Difference]: Start difference. First operand has 400 places, 590 transitions, 7216 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:46:26,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 612 transitions, 8504 flow [2024-06-03 19:46:30,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 612 transitions, 8282 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-03 19:46:30,999 INFO L231 Difference]: Finished difference. Result has 404 places, 590 transitions, 7115 flow [2024-06-03 19:46:31,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6994, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7115, PETRI_PLACES=404, PETRI_TRANSITIONS=590} [2024-06-03 19:46:31,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-03 19:46:31,000 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 590 transitions, 7115 flow [2024-06-03 19:46:31,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:31,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:31,000 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] [2024-06-03 19:46:31,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:46:31,000 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)] === [2024-06-03 19:46:31,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1156441020, now seen corresponding path program 4 times [2024-06-03 19:46:31,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:31,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345610221] [2024-06-03 19:46:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:31,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:32,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:32,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345610221] [2024-06-03 19:46:32,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345610221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:32,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:32,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:32,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605864685] [2024-06-03 19:46:32,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:32,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:32,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:32,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:32,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:32,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:32,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 590 transitions, 7115 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:32,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:32,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:32,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:33,501 INFO L124 PetriNetUnfolderBase]: 3217/5162 cut-off events. [2024-06-03 19:46:33,501 INFO L125 PetriNetUnfolderBase]: For 1265842/1265842 co-relation queries the response was YES. [2024-06-03 19:46:33,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58067 conditions, 5162 events. 3217/5162 cut-off events. For 1265842/1265842 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30985 event pairs, 676 based on Foata normal form. 2/5163 useless extension candidates. Maximal degree in co-relation 57884. Up to 4699 conditions per place. [2024-06-03 19:46:33,582 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 532 selfloop transitions, 72 changer transitions 0/609 dead transitions. [2024-06-03 19:46:33,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 609 transitions, 8455 flow [2024-06-03 19:46:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:46:33,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:46:33,583 INFO L175 Difference]: Start difference. First operand has 404 places, 590 transitions, 7115 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:46:33,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 609 transitions, 8455 flow [2024-06-03 19:46:39,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 609 transitions, 8290 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-03 19:46:39,252 INFO L231 Difference]: Finished difference. Result has 404 places, 592 transitions, 7181 flow [2024-06-03 19:46:39,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6950, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7181, PETRI_PLACES=404, PETRI_TRANSITIONS=592} [2024-06-03 19:46:39,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-03 19:46:39,253 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 592 transitions, 7181 flow [2024-06-03 19:46:39,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:39,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:39,253 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] [2024-06-03 19:46:39,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:46:39,253 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)] === [2024-06-03 19:46:39,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash 181693660, now seen corresponding path program 5 times [2024-06-03 19:46:39,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:39,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123961864] [2024-06-03 19:46:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:39,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:40,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:40,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123961864] [2024-06-03 19:46:40,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123961864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:40,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:40,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:40,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785821733] [2024-06-03 19:46:40,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:40,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:40,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:40,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:40,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 592 transitions, 7181 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:40,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:40,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:40,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:41,783 INFO L124 PetriNetUnfolderBase]: 3225/5174 cut-off events. [2024-06-03 19:46:41,783 INFO L125 PetriNetUnfolderBase]: For 1284848/1284848 co-relation queries the response was YES. [2024-06-03 19:46:41,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58458 conditions, 5174 events. 3225/5174 cut-off events. For 1284848/1284848 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 31047 event pairs, 678 based on Foata normal form. 2/5175 useless extension candidates. Maximal degree in co-relation 58274. Up to 4711 conditions per place. [2024-06-03 19:46:41,868 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 540 selfloop transitions, 66 changer transitions 0/611 dead transitions. [2024-06-03 19:46:41,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 611 transitions, 8529 flow [2024-06-03 19:46:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:46:41,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-03 19:46:41,872 INFO L175 Difference]: Start difference. First operand has 404 places, 592 transitions, 7181 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:46:41,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 611 transitions, 8529 flow [2024-06-03 19:46:48,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 611 transitions, 8314 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:48,607 INFO L231 Difference]: Finished difference. Result has 406 places, 594 transitions, 7189 flow [2024-06-03 19:46:48,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6966, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7189, PETRI_PLACES=406, PETRI_TRANSITIONS=594} [2024-06-03 19:46:48,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-03 19:46:48,608 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 594 transitions, 7189 flow [2024-06-03 19:46:48,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:48,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:48,608 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] [2024-06-03 19:46:48,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:46:48,608 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)] === [2024-06-03 19:46:48,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:48,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1145389830, now seen corresponding path program 6 times [2024-06-03 19:46:48,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:48,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781186094] [2024-06-03 19:46:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:48,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:49,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:49,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781186094] [2024-06-03 19:46:49,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781186094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:49,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:49,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:49,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000950425] [2024-06-03 19:46:49,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:49,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:49,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:49,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:49,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 594 transitions, 7189 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:49,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:49,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:49,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:51,092 INFO L124 PetriNetUnfolderBase]: 3233/5186 cut-off events. [2024-06-03 19:46:51,092 INFO L125 PetriNetUnfolderBase]: For 1303086/1303086 co-relation queries the response was YES. [2024-06-03 19:46:51,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58756 conditions, 5186 events. 3233/5186 cut-off events. For 1303086/1303086 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 31140 event pairs, 676 based on Foata normal form. 2/5187 useless extension candidates. Maximal degree in co-relation 58571. Up to 4703 conditions per place. [2024-06-03 19:46:51,194 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 538 selfloop transitions, 71 changer transitions 0/614 dead transitions. [2024-06-03 19:46:51,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 614 transitions, 8549 flow [2024-06-03 19:46:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:46:51,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 19:46:51,196 INFO L175 Difference]: Start difference. First operand has 406 places, 594 transitions, 7189 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:46:51,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 614 transitions, 8549 flow [2024-06-03 19:46:56,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 614 transitions, 8375 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:56,280 INFO L231 Difference]: Finished difference. Result has 409 places, 596 transitions, 7252 flow [2024-06-03 19:46:56,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7015, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7252, PETRI_PLACES=409, PETRI_TRANSITIONS=596} [2024-06-03 19:46:56,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-03 19:46:56,281 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 596 transitions, 7252 flow [2024-06-03 19:46:56,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:56,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:56,281 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] [2024-06-03 19:46:56,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:46:56,281 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)] === [2024-06-03 19:46:56,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:56,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1156841199, now seen corresponding path program 1 times [2024-06-03 19:46:56,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:56,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761800034] [2024-06-03 19:46:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:56,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:57,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761800034] [2024-06-03 19:46:57,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761800034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:57,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:57,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:46:57,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343393785] [2024-06-03 19:46:57,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:57,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:46:57,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:57,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:46:57,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:46:57,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:57,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 596 transitions, 7252 flow. Second operand has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:57,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:57,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:57,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:59,040 INFO L124 PetriNetUnfolderBase]: 3013/4898 cut-off events. [2024-06-03 19:46:59,040 INFO L125 PetriNetUnfolderBase]: For 1321873/1321913 co-relation queries the response was YES. [2024-06-03 19:46:59,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57057 conditions, 4898 events. 3013/4898 cut-off events. For 1321873/1321913 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29907 event pairs, 627 based on Foata normal form. 5/4848 useless extension candidates. Maximal degree in co-relation 56871. Up to 4226 conditions per place. [2024-06-03 19:46:59,124 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 468 selfloop transitions, 80 changer transitions 0/616 dead transitions. [2024-06-03 19:46:59,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 616 transitions, 8510 flow [2024-06-03 19:46:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:46:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:46:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-03 19:46:59,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-03 19:46:59,125 INFO L175 Difference]: Start difference. First operand has 409 places, 596 transitions, 7252 flow. Second operand 10 states and 177 transitions. [2024-06-03 19:46:59,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 616 transitions, 8510 flow [2024-06-03 19:47:03,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 616 transitions, 8289 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:03,702 INFO L231 Difference]: Finished difference. Result has 412 places, 599 transitions, 7311 flow [2024-06-03 19:47:03,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7311, PETRI_PLACES=412, PETRI_TRANSITIONS=599} [2024-06-03 19:47:03,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-03 19:47:03,703 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 599 transitions, 7311 flow [2024-06-03 19:47:03,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:03,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:03,703 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] [2024-06-03 19:47:03,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:47:03,703 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)] === [2024-06-03 19:47:03,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:03,704 INFO L85 PathProgramCache]: Analyzing trace with hash 250847958, now seen corresponding path program 5 times [2024-06-03 19:47:03,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:03,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427080831] [2024-06-03 19:47:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:03,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:04,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427080831] [2024-06-03 19:47:04,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427080831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:04,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:04,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:04,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474090758] [2024-06-03 19:47:04,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:04,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:04,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:04,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:05,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:47:05,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 599 transitions, 7311 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:05,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:05,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:47:05,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:06,767 INFO L124 PetriNetUnfolderBase]: 3148/5108 cut-off events. [2024-06-03 19:47:06,767 INFO L125 PetriNetUnfolderBase]: For 1337433/1337433 co-relation queries the response was YES. [2024-06-03 19:47:06,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59055 conditions, 5108 events. 3148/5108 cut-off events. For 1337433/1337433 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 31216 event pairs, 643 based on Foata normal form. 1/5092 useless extension candidates. Maximal degree in co-relation 58868. Up to 4232 conditions per place. [2024-06-03 19:47:06,845 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 463 selfloop transitions, 109 changer transitions 0/625 dead transitions. [2024-06-03 19:47:06,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 625 transitions, 8737 flow [2024-06-03 19:47:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:47:06,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:47:06,847 INFO L175 Difference]: Start difference. First operand has 412 places, 599 transitions, 7311 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:47:06,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 625 transitions, 8737 flow [2024-06-03 19:47:12,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 625 transitions, 8479 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-03 19:47:12,379 INFO L231 Difference]: Finished difference. Result has 413 places, 602 transitions, 7477 flow [2024-06-03 19:47:12,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7053, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7477, PETRI_PLACES=413, PETRI_TRANSITIONS=602} [2024-06-03 19:47:12,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-03 19:47:12,380 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 602 transitions, 7477 flow [2024-06-03 19:47:12,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:12,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:12,380 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] [2024-06-03 19:47:12,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:47:12,381 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)] === [2024-06-03 19:47:12,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:12,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1129651918, now seen corresponding path program 2 times [2024-06-03 19:47:12,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:12,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842529452] [2024-06-03 19:47:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:12,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:13,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:13,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842529452] [2024-06-03 19:47:13,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842529452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:13,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:13,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:13,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464222358] [2024-06-03 19:47:13,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:13,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:13,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:13,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:13,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:13,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:13,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 602 transitions, 7477 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:13,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:13,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:13,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:15,275 INFO L124 PetriNetUnfolderBase]: 3253/5222 cut-off events. [2024-06-03 19:47:15,275 INFO L125 PetriNetUnfolderBase]: For 1362567/1362571 co-relation queries the response was YES. [2024-06-03 19:47:15,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60351 conditions, 5222 events. 3253/5222 cut-off events. For 1362567/1362571 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31486 event pairs, 689 based on Foata normal form. 5/5226 useless extension candidates. Maximal degree in co-relation 60163. Up to 4752 conditions per place. [2024-06-03 19:47:15,364 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 565 selfloop transitions, 55 changer transitions 0/625 dead transitions. [2024-06-03 19:47:15,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 625 transitions, 8941 flow [2024-06-03 19:47:15,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:47:15,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 19:47:15,365 INFO L175 Difference]: Start difference. First operand has 413 places, 602 transitions, 7477 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:47:15,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 625 transitions, 8941 flow [2024-06-03 19:47:21,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 625 transitions, 8537 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:21,551 INFO L231 Difference]: Finished difference. Result has 415 places, 605 transitions, 7345 flow [2024-06-03 19:47:21,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7073, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7345, PETRI_PLACES=415, PETRI_TRANSITIONS=605} [2024-06-03 19:47:21,552 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-03 19:47:21,552 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 605 transitions, 7345 flow [2024-06-03 19:47:21,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:21,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:21,553 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] [2024-06-03 19:47:21,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:47:21,553 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)] === [2024-06-03 19:47:21,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1129651546, now seen corresponding path program 6 times [2024-06-03 19:47:21,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:21,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841416027] [2024-06-03 19:47:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:21,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:22,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:22,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841416027] [2024-06-03 19:47:22,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841416027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:22,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:22,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:22,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342977920] [2024-06-03 19:47:22,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:22,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:22,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:22,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:22,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:22,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:47:22,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 605 transitions, 7345 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:22,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:22,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:47:22,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:24,305 INFO L124 PetriNetUnfolderBase]: 3158/5120 cut-off events. [2024-06-03 19:47:24,305 INFO L125 PetriNetUnfolderBase]: For 1388429/1388429 co-relation queries the response was YES. [2024-06-03 19:47:24,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60076 conditions, 5120 events. 3158/5120 cut-off events. For 1388429/1388429 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31284 event pairs, 643 based on Foata normal form. 1/5104 useless extension candidates. Maximal degree in co-relation 59887. Up to 4238 conditions per place. [2024-06-03 19:47:24,394 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 460 selfloop transitions, 114 changer transitions 0/628 dead transitions. [2024-06-03 19:47:24,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 628 transitions, 8769 flow [2024-06-03 19:47:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:47:24,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-03 19:47:24,395 INFO L175 Difference]: Start difference. First operand has 415 places, 605 transitions, 7345 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:47:24,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 628 transitions, 8769 flow [2024-06-03 19:47:31,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 628 transitions, 8519 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:31,168 INFO L231 Difference]: Finished difference. Result has 417 places, 608 transitions, 7537 flow [2024-06-03 19:47:31,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7095, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7537, PETRI_PLACES=417, PETRI_TRANSITIONS=608} [2024-06-03 19:47:31,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-03 19:47:31,169 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 608 transitions, 7537 flow [2024-06-03 19:47:31,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:31,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:31,169 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] [2024-06-03 19:47:31,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:47:31,169 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)] === [2024-06-03 19:47:31,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:31,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1640615338, now seen corresponding path program 7 times [2024-06-03 19:47:31,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:31,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036727022] [2024-06-03 19:47:31,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:31,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:32,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:32,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036727022] [2024-06-03 19:47:32,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036727022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:32,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:32,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:32,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832967548] [2024-06-03 19:47:32,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:32,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:32,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:32,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:32,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:32,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:47:32,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 608 transitions, 7537 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:32,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:32,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:47:32,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:33,688 INFO L124 PetriNetUnfolderBase]: 3174/5150 cut-off events. [2024-06-03 19:47:33,688 INFO L125 PetriNetUnfolderBase]: For 1418235/1418235 co-relation queries the response was YES. [2024-06-03 19:47:33,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60986 conditions, 5150 events. 3174/5150 cut-off events. For 1418235/1418235 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31486 event pairs, 644 based on Foata normal form. 1/5134 useless extension candidates. Maximal degree in co-relation 60796. Up to 4263 conditions per place. [2024-06-03 19:47:33,776 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 484 selfloop transitions, 100 changer transitions 0/638 dead transitions. [2024-06-03 19:47:33,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 638 transitions, 9040 flow [2024-06-03 19:47:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 19:47:33,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-03 19:47:33,777 INFO L175 Difference]: Start difference. First operand has 417 places, 608 transitions, 7537 flow. Second operand 9 states and 176 transitions. [2024-06-03 19:47:33,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 638 transitions, 9040 flow [2024-06-03 19:47:40,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 638 transitions, 8614 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:40,479 INFO L231 Difference]: Finished difference. Result has 419 places, 614 transitions, 7563 flow [2024-06-03 19:47:40,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7117, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7563, PETRI_PLACES=419, PETRI_TRANSITIONS=614} [2024-06-03 19:47:40,479 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-03 19:47:40,480 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 614 transitions, 7563 flow [2024-06-03 19:47:40,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:40,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:40,480 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] [2024-06-03 19:47:40,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 19:47:40,480 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)] === [2024-06-03 19:47:40,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash -174799086, now seen corresponding path program 8 times [2024-06-03 19:47:40,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:40,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024164877] [2024-06-03 19:47:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:40,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:41,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:41,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024164877] [2024-06-03 19:47:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024164877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:41,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:41,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:41,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735622553] [2024-06-03 19:47:41,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:41,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:41,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:41,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:41,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:41,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:47:41,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 614 transitions, 7563 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:41,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:41,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:47:41,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:43,192 INFO L124 PetriNetUnfolderBase]: 3187/5170 cut-off events. [2024-06-03 19:47:43,193 INFO L125 PetriNetUnfolderBase]: For 1458753/1458753 co-relation queries the response was YES. [2024-06-03 19:47:43,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61958 conditions, 5170 events. 3187/5170 cut-off events. For 1458753/1458753 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31636 event pairs, 606 based on Foata normal form. 1/5154 useless extension candidates. Maximal degree in co-relation 61767. Up to 4271 conditions per place. [2024-06-03 19:47:43,287 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 480 selfloop transitions, 108 changer transitions 0/642 dead transitions. [2024-06-03 19:47:43,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 642 transitions, 9512 flow [2024-06-03 19:47:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:47:43,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-03 19:47:43,288 INFO L175 Difference]: Start difference. First operand has 419 places, 614 transitions, 7563 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:47:43,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 642 transitions, 9512 flow [2024-06-03 19:47:49,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 642 transitions, 9116 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-06-03 19:47:49,377 INFO L231 Difference]: Finished difference. Result has 422 places, 620 transitions, 7823 flow [2024-06-03 19:47:49,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7167, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7823, PETRI_PLACES=422, PETRI_TRANSITIONS=620} [2024-06-03 19:47:49,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-03 19:47:49,378 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 620 transitions, 7823 flow [2024-06-03 19:47:49,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:49,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:49,378 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] [2024-06-03 19:47:49,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 19:47:49,378 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)] === [2024-06-03 19:47:49,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1934305858, now seen corresponding path program 3 times [2024-06-03 19:47:49,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:49,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333484730] [2024-06-03 19:47:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:49,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:50,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:50,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333484730] [2024-06-03 19:47:50,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333484730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:50,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:50,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:50,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39973452] [2024-06-03 19:47:50,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:50,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:50,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:50,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:50,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 620 transitions, 7823 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:50,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:50,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:50,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:52,362 INFO L124 PetriNetUnfolderBase]: 3292/5284 cut-off events. [2024-06-03 19:47:52,362 INFO L125 PetriNetUnfolderBase]: For 1483640/1483644 co-relation queries the response was YES. [2024-06-03 19:47:52,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63070 conditions, 5284 events. 3292/5284 cut-off events. For 1483640/1483644 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31965 event pairs, 690 based on Foata normal form. 5/5288 useless extension candidates. Maximal degree in co-relation 62878. Up to 4807 conditions per place. [2024-06-03 19:47:52,463 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 588 selfloop transitions, 51 changer transitions 0/644 dead transitions. [2024-06-03 19:47:52,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 644 transitions, 9344 flow [2024-06-03 19:47:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:47:52,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 19:47:52,464 INFO L175 Difference]: Start difference. First operand has 422 places, 620 transitions, 7823 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:47:52,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 644 transitions, 9344 flow [2024-06-03 19:47:58,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 644 transitions, 8990 flow, removed 121 selfloop flow, removed 5 redundant places. [2024-06-03 19:47:58,865 INFO L231 Difference]: Finished difference. Result has 426 places, 623 transitions, 7745 flow [2024-06-03 19:47:58,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7469, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7745, PETRI_PLACES=426, PETRI_TRANSITIONS=623} [2024-06-03 19:47:58,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-03 19:47:58,865 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 623 transitions, 7745 flow [2024-06-03 19:47:58,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:58,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:58,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:58,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 19:47:58,866 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)] === [2024-06-03 19:47:58,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1325377888, now seen corresponding path program 9 times [2024-06-03 19:47:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:58,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049657682] [2024-06-03 19:47:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:00,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:00,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049657682] [2024-06-03 19:48:00,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049657682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:00,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:00,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:00,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930211545] [2024-06-03 19:48:00,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:00,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:00,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:00,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:00,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:00,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:48:00,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 623 transitions, 7745 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:00,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:00,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:48:00,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:01,552 INFO L124 PetriNetUnfolderBase]: 3197/5188 cut-off events. [2024-06-03 19:48:01,552 INFO L125 PetriNetUnfolderBase]: For 1509520/1509520 co-relation queries the response was YES. [2024-06-03 19:48:01,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63042 conditions, 5188 events. 3197/5188 cut-off events. For 1509520/1509520 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31847 event pairs, 643 based on Foata normal form. 1/5172 useless extension candidates. Maximal degree in co-relation 62848. Up to 4234 conditions per place. [2024-06-03 19:48:01,649 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 429 selfloop transitions, 163 changer transitions 0/647 dead transitions. [2024-06-03 19:48:01,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 647 transitions, 9701 flow [2024-06-03 19:48:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:48:01,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:48:01,650 INFO L175 Difference]: Start difference. First operand has 426 places, 623 transitions, 7745 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:48:01,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 647 transitions, 9701 flow [2024-06-03 19:48:08,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 647 transitions, 9447 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-03 19:48:08,413 INFO L231 Difference]: Finished difference. Result has 428 places, 629 transitions, 8273 flow [2024-06-03 19:48:08,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7491, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8273, PETRI_PLACES=428, PETRI_TRANSITIONS=629} [2024-06-03 19:48:08,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-03 19:48:08,414 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 629 transitions, 8273 flow [2024-06-03 19:48:08,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:08,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:08,414 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] [2024-06-03 19:48:08,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 19:48:08,415 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)] === [2024-06-03 19:48:08,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:08,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1770311540, now seen corresponding path program 10 times [2024-06-03 19:48:08,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:08,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236018972] [2024-06-03 19:48:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:08,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:09,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:09,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236018972] [2024-06-03 19:48:09,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236018972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:09,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:09,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:09,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391124330] [2024-06-03 19:48:09,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:09,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:09,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:48:09,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 629 transitions, 8273 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:09,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:09,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:48:09,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:11,131 INFO L124 PetriNetUnfolderBase]: 3194/5184 cut-off events. [2024-06-03 19:48:11,131 INFO L125 PetriNetUnfolderBase]: For 1528377/1528377 co-relation queries the response was YES. [2024-06-03 19:48:11,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63504 conditions, 5184 events. 3194/5184 cut-off events. For 1528377/1528377 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31791 event pairs, 644 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 63309. Up to 4289 conditions per place. [2024-06-03 19:48:11,224 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 497 selfloop transitions, 101 changer transitions 0/653 dead transitions. [2024-06-03 19:48:11,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 653 transitions, 9564 flow [2024-06-03 19:48:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:48:11,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-03 19:48:11,225 INFO L175 Difference]: Start difference. First operand has 428 places, 629 transitions, 8273 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:48:11,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 653 transitions, 9564 flow [2024-06-03 19:48:18,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 653 transitions, 9006 flow, removed 210 selfloop flow, removed 5 redundant places. [2024-06-03 19:48:18,283 INFO L231 Difference]: Finished difference. Result has 432 places, 629 transitions, 7923 flow [2024-06-03 19:48:18,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7715, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7923, PETRI_PLACES=432, PETRI_TRANSITIONS=629} [2024-06-03 19:48:18,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-03 19:48:18,284 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 629 transitions, 7923 flow [2024-06-03 19:48:18,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:18,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:18,284 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] [2024-06-03 19:48:18,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 19:48:18,285 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)] === [2024-06-03 19:48:18,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:18,285 INFO L85 PathProgramCache]: Analyzing trace with hash 605121600, now seen corresponding path program 4 times [2024-06-03 19:48:18,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:18,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602731878] [2024-06-03 19:48:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:18,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:19,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:19,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602731878] [2024-06-03 19:48:19,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602731878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:19,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:19,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:19,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514912112] [2024-06-03 19:48:19,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:19,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:19,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:19,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:19,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:19,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:19,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 629 transitions, 7923 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:19,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:19,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:19,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:21,151 INFO L124 PetriNetUnfolderBase]: 3307/5309 cut-off events. [2024-06-03 19:48:21,151 INFO L125 PetriNetUnfolderBase]: For 1541102/1541106 co-relation queries the response was YES. [2024-06-03 19:48:21,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64257 conditions, 5309 events. 3307/5309 cut-off events. For 1541102/1541106 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32082 event pairs, 647 based on Foata normal form. 5/5313 useless extension candidates. Maximal degree in co-relation 64060. Up to 4793 conditions per place. [2024-06-03 19:48:21,244 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 570 selfloop transitions, 82 changer transitions 0/657 dead transitions. [2024-06-03 19:48:21,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 657 transitions, 10335 flow [2024-06-03 19:48:21,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:48:21,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:48:21,246 INFO L175 Difference]: Start difference. First operand has 432 places, 629 transitions, 7923 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:48:21,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 657 transitions, 10335 flow [2024-06-03 19:48:28,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 657 transitions, 10095 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 19:48:28,882 INFO L231 Difference]: Finished difference. Result has 432 places, 638 transitions, 8363 flow [2024-06-03 19:48:28,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7683, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8363, PETRI_PLACES=432, PETRI_TRANSITIONS=638} [2024-06-03 19:48:28,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-03 19:48:28,883 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 638 transitions, 8363 flow [2024-06-03 19:48:28,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:28,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:28,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:28,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 19:48:28,884 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)] === [2024-06-03 19:48:28,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1893848076, now seen corresponding path program 5 times [2024-06-03 19:48:28,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:28,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898075384] [2024-06-03 19:48:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:30,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898075384] [2024-06-03 19:48:30,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898075384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:30,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:30,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:30,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892301710] [2024-06-03 19:48:30,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:30,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:30,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:30,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:30,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:30,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 638 transitions, 8363 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:30,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:30,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:30,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:31,789 INFO L124 PetriNetUnfolderBase]: 3304/5305 cut-off events. [2024-06-03 19:48:31,789 INFO L125 PetriNetUnfolderBase]: For 1558652/1558656 co-relation queries the response was YES. [2024-06-03 19:48:31,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64357 conditions, 5305 events. 3304/5305 cut-off events. For 1558652/1558656 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32097 event pairs, 689 based on Foata normal form. 5/5309 useless extension candidates. Maximal degree in co-relation 64159. Up to 4790 conditions per place. [2024-06-03 19:48:31,883 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 565 selfloop transitions, 86 changer transitions 0/656 dead transitions. [2024-06-03 19:48:31,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 656 transitions, 9999 flow [2024-06-03 19:48:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:48:31,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 19:48:31,884 INFO L175 Difference]: Start difference. First operand has 432 places, 638 transitions, 8363 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:48:31,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 656 transitions, 9999 flow [2024-06-03 19:48:38,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 656 transitions, 9583 flow, removed 178 selfloop flow, removed 4 redundant places. [2024-06-03 19:48:38,540 INFO L231 Difference]: Finished difference. Result has 437 places, 638 transitions, 8125 flow [2024-06-03 19:48:38,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7947, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8125, PETRI_PLACES=437, PETRI_TRANSITIONS=638} [2024-06-03 19:48:38,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-03 19:48:38,541 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 638 transitions, 8125 flow [2024-06-03 19:48:38,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:38,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:38,542 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] [2024-06-03 19:48:38,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 19:48:38,542 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)] === [2024-06-03 19:48:38,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:38,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1455614002, now seen corresponding path program 13 times [2024-06-03 19:48:38,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:38,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806183911] [2024-06-03 19:48:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:38,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:39,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:39,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806183911] [2024-06-03 19:48:39,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806183911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:39,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:39,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:39,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444057643] [2024-06-03 19:48:39,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:39,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:39,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:39,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:39,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:39,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 638 transitions, 8125 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:39,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:39,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:39,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:41,499 INFO L124 PetriNetUnfolderBase]: 3314/5318 cut-off events. [2024-06-03 19:48:41,499 INFO L125 PetriNetUnfolderBase]: For 1584074/1584074 co-relation queries the response was YES. [2024-06-03 19:48:41,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64588 conditions, 5318 events. 3314/5318 cut-off events. For 1584074/1584074 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32163 event pairs, 682 based on Foata normal form. 2/5319 useless extension candidates. Maximal degree in co-relation 64388. Up to 4766 conditions per place. [2024-06-03 19:48:41,597 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 579 selfloop transitions, 79 changer transitions 0/663 dead transitions. [2024-06-03 19:48:41,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 663 transitions, 9684 flow [2024-06-03 19:48:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:48:41,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:48:41,598 INFO L175 Difference]: Start difference. First operand has 437 places, 638 transitions, 8125 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:48:41,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 663 transitions, 9684 flow [2024-06-03 19:48:47,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 663 transitions, 9520 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 19:48:47,911 INFO L231 Difference]: Finished difference. Result has 439 places, 641 transitions, 8285 flow [2024-06-03 19:48:47,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7961, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8285, PETRI_PLACES=439, PETRI_TRANSITIONS=641} [2024-06-03 19:48:47,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-03 19:48:47,911 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 641 transitions, 8285 flow [2024-06-03 19:48:47,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:47,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:47,912 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] [2024-06-03 19:48:47,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 19:48:47,912 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)] === [2024-06-03 19:48:47,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1779582369, now seen corresponding path program 5 times [2024-06-03 19:48:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:47,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416194346] [2024-06-03 19:48:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:47,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:48,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416194346] [2024-06-03 19:48:48,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416194346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:48,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:48,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:48,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984388802] [2024-06-03 19:48:48,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:48,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:48,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:48,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:48,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 641 transitions, 8285 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:48,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:48,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:48,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:50,661 INFO L124 PetriNetUnfolderBase]: 3308/5315 cut-off events. [2024-06-03 19:48:50,661 INFO L125 PetriNetUnfolderBase]: For 1586343/1586347 co-relation queries the response was YES. [2024-06-03 19:48:50,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64424 conditions, 5315 events. 3308/5315 cut-off events. For 1586343/1586347 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32186 event pairs, 682 based on Foata normal form. 6/5320 useless extension candidates. Maximal degree in co-relation 64223. Up to 4858 conditions per place. [2024-06-03 19:48:50,744 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 610 selfloop transitions, 47 changer transitions 0/662 dead transitions. [2024-06-03 19:48:50,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 662 transitions, 9707 flow [2024-06-03 19:48:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:48:50,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 19:48:50,745 INFO L175 Difference]: Start difference. First operand has 439 places, 641 transitions, 8285 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:48:50,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 662 transitions, 9707 flow [2024-06-03 19:48:57,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 662 transitions, 9331 flow, removed 111 selfloop flow, removed 7 redundant places. [2024-06-03 19:48:57,363 INFO L231 Difference]: Finished difference. Result has 441 places, 642 transitions, 8036 flow [2024-06-03 19:48:57,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7925, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8036, PETRI_PLACES=441, PETRI_TRANSITIONS=642} [2024-06-03 19:48:57,364 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-03 19:48:57,364 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 642 transitions, 8036 flow [2024-06-03 19:48:57,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:57,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:57,364 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] [2024-06-03 19:48:57,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 19:48:57,364 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)] === [2024-06-03 19:48:57,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -291765378, now seen corresponding path program 14 times [2024-06-03 19:48:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:57,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576815092] [2024-06-03 19:48:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:58,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576815092] [2024-06-03 19:48:58,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576815092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:58,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:58,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:58,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209539830] [2024-06-03 19:48:58,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:58,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:58,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:58,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:58,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:58,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:58,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 642 transitions, 8036 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:58,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:58,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:58,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:59,997 INFO L124 PetriNetUnfolderBase]: 3318/5326 cut-off events. [2024-06-03 19:48:59,997 INFO L125 PetriNetUnfolderBase]: For 1603982/1603982 co-relation queries the response was YES. [2024-06-03 19:49:00,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64428 conditions, 5326 events. 3318/5326 cut-off events. For 1603982/1603982 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32211 event pairs, 673 based on Foata normal form. 2/5327 useless extension candidates. Maximal degree in co-relation 64226. Up to 4717 conditions per place. [2024-06-03 19:49:00,111 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 569 selfloop transitions, 93 changer transitions 0/667 dead transitions. [2024-06-03 19:49:00,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 667 transitions, 9891 flow [2024-06-03 19:49:00,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:00,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:49:00,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:49:00,112 INFO L175 Difference]: Start difference. First operand has 441 places, 642 transitions, 8036 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:49:00,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 667 transitions, 9891 flow [2024-06-03 19:49:06,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 667 transitions, 9791 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:06,441 INFO L231 Difference]: Finished difference. Result has 443 places, 645 transitions, 8288 flow [2024-06-03 19:49:06,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7936, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8288, PETRI_PLACES=443, PETRI_TRANSITIONS=645} [2024-06-03 19:49:06,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-03 19:49:06,442 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 645 transitions, 8288 flow [2024-06-03 19:49:06,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:06,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:06,442 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] [2024-06-03 19:49:06,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 19:49:06,442 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)] === [2024-06-03 19:49:06,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1636603132, now seen corresponding path program 15 times [2024-06-03 19:49:06,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:06,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693739170] [2024-06-03 19:49:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:07,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:07,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693739170] [2024-06-03 19:49:07,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693739170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:07,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:07,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:07,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457072092] [2024-06-03 19:49:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:07,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:07,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:07,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 645 transitions, 8288 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:07,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:07,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:07,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:09,047 INFO L124 PetriNetUnfolderBase]: 3312/5320 cut-off events. [2024-06-03 19:49:09,047 INFO L125 PetriNetUnfolderBase]: For 1604999/1604999 co-relation queries the response was YES. [2024-06-03 19:49:09,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64311 conditions, 5320 events. 3312/5320 cut-off events. For 1604999/1604999 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32204 event pairs, 633 based on Foata normal form. 2/5321 useless extension candidates. Maximal degree in co-relation 64108. Up to 4712 conditions per place. [2024-06-03 19:49:09,146 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 569 selfloop transitions, 92 changer transitions 0/666 dead transitions. [2024-06-03 19:49:09,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 666 transitions, 9701 flow [2024-06-03 19:49:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:49:09,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:49:09,147 INFO L175 Difference]: Start difference. First operand has 443 places, 645 transitions, 8288 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:49:09,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 666 transitions, 9701 flow [2024-06-03 19:49:15,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 666 transitions, 8799 flow, removed 137 selfloop flow, removed 11 redundant places. [2024-06-03 19:49:15,855 INFO L231 Difference]: Finished difference. Result has 441 places, 645 transitions, 7576 flow [2024-06-03 19:49:15,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7386, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7576, PETRI_PLACES=441, PETRI_TRANSITIONS=645} [2024-06-03 19:49:15,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-03 19:49:15,857 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 645 transitions, 7576 flow [2024-06-03 19:49:15,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:15,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:15,857 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] [2024-06-03 19:49:15,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 19:49:15,857 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)] === [2024-06-03 19:49:15,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash -123165279, now seen corresponding path program 6 times [2024-06-03 19:49:15,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:15,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791323486] [2024-06-03 19:49:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:15,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:16,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:16,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791323486] [2024-06-03 19:49:16,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791323486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:16,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:16,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:16,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673762071] [2024-06-03 19:49:16,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:16,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:16,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:16,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:16,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:17,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:17,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 645 transitions, 7576 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:17,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:17,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:17,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:18,499 INFO L124 PetriNetUnfolderBase]: 3338/5357 cut-off events. [2024-06-03 19:49:18,499 INFO L125 PetriNetUnfolderBase]: For 1642278/1642282 co-relation queries the response was YES. [2024-06-03 19:49:18,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64148 conditions, 5357 events. 3338/5357 cut-off events. For 1642278/1642282 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 32513 event pairs, 631 based on Foata normal form. 6/5362 useless extension candidates. Maximal degree in co-relation 63946. Up to 4763 conditions per place. [2024-06-03 19:49:18,599 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 586 selfloop transitions, 82 changer transitions 0/673 dead transitions. [2024-06-03 19:49:18,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 673 transitions, 9574 flow [2024-06-03 19:49:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:49:18,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:49:18,600 INFO L175 Difference]: Start difference. First operand has 441 places, 645 transitions, 7576 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:49:18,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 673 transitions, 9574 flow [2024-06-03 19:49:25,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 673 transitions, 9338 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 19:49:25,144 INFO L231 Difference]: Finished difference. Result has 442 places, 654 transitions, 7861 flow [2024-06-03 19:49:25,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7340, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7861, PETRI_PLACES=442, PETRI_TRANSITIONS=654} [2024-06-03 19:49:25,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-03 19:49:25,144 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 654 transitions, 7861 flow [2024-06-03 19:49:25,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:25,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:25,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:25,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 19:49:25,145 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)] === [2024-06-03 19:49:25,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash 755627676, now seen corresponding path program 16 times [2024-06-03 19:49:25,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:25,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249223217] [2024-06-03 19:49:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:25,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:26,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:26,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249223217] [2024-06-03 19:49:26,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249223217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:26,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:26,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:26,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94054137] [2024-06-03 19:49:26,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:26,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:26,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:26,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:26,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:26,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 654 transitions, 7861 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:26,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:26,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:26,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:27,842 INFO L124 PetriNetUnfolderBase]: 3380/5422 cut-off events. [2024-06-03 19:49:27,842 INFO L125 PetriNetUnfolderBase]: For 1724647/1724647 co-relation queries the response was YES. [2024-06-03 19:49:27,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66564 conditions, 5422 events. 3380/5422 cut-off events. For 1724647/1724647 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 32908 event pairs, 672 based on Foata normal form. 2/5423 useless extension candidates. Maximal degree in co-relation 66360. Up to 4554 conditions per place. [2024-06-03 19:49:27,938 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 528 selfloop transitions, 150 changer transitions 0/683 dead transitions. [2024-06-03 19:49:27,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 683 transitions, 10467 flow [2024-06-03 19:49:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:49:27,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:49:27,940 INFO L175 Difference]: Start difference. First operand has 442 places, 654 transitions, 7861 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:49:27,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 683 transitions, 10467 flow [2024-06-03 19:49:33,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 683 transitions, 10254 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-03 19:49:33,642 INFO L231 Difference]: Finished difference. Result has 447 places, 663 transitions, 8560 flow [2024-06-03 19:49:33,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7648, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8560, PETRI_PLACES=447, PETRI_TRANSITIONS=663} [2024-06-03 19:49:33,643 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-03 19:49:33,643 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 663 transitions, 8560 flow [2024-06-03 19:49:33,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:33,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:33,643 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] [2024-06-03 19:49:33,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 19:49:33,644 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)] === [2024-06-03 19:49:33,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash 768514686, now seen corresponding path program 17 times [2024-06-03 19:49:33,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:33,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59517743] [2024-06-03 19:49:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:33,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:34,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:34,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59517743] [2024-06-03 19:49:34,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59517743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:34,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:34,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:34,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42592210] [2024-06-03 19:49:34,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:34,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:34,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:34,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:34,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:34,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:34,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 663 transitions, 8560 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:34,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:34,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:34,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:36,477 INFO L124 PetriNetUnfolderBase]: 3374/5430 cut-off events. [2024-06-03 19:49:36,477 INFO L125 PetriNetUnfolderBase]: For 1733996/1733996 co-relation queries the response was YES. [2024-06-03 19:49:36,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66876 conditions, 5430 events. 3374/5430 cut-off events. For 1733996/1733996 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33125 event pairs, 614 based on Foata normal form. 2/5431 useless extension candidates. Maximal degree in co-relation 66670. Up to 4549 conditions per place. [2024-06-03 19:49:36,579 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 511 selfloop transitions, 166 changer transitions 0/682 dead transitions. [2024-06-03 19:49:36,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 682 transitions, 10280 flow [2024-06-03 19:49:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:49:36,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:49:36,580 INFO L175 Difference]: Start difference. First operand has 447 places, 663 transitions, 8560 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:49:36,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 682 transitions, 10280 flow [2024-06-03 19:49:43,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 682 transitions, 9706 flow, removed 208 selfloop flow, removed 4 redundant places. [2024-06-03 19:49:43,168 INFO L231 Difference]: Finished difference. Result has 452 places, 663 transitions, 8324 flow [2024-06-03 19:49:43,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7986, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8324, PETRI_PLACES=452, PETRI_TRANSITIONS=663} [2024-06-03 19:49:43,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-03 19:49:43,169 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 663 transitions, 8324 flow [2024-06-03 19:49:43,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:43,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:43,169 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] [2024-06-03 19:49:43,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 19:49:43,170 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)] === [2024-06-03 19:49:43,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1177349253, now seen corresponding path program 7 times [2024-06-03 19:49:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:43,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866496217] [2024-06-03 19:49:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:43,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:44,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866496217] [2024-06-03 19:49:44,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866496217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:44,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:44,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:44,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907223152] [2024-06-03 19:49:44,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:44,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:44,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:44,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:44,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:44,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 663 transitions, 8324 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:44,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:44,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:44,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:45,893 INFO L124 PetriNetUnfolderBase]: 3384/5433 cut-off events. [2024-06-03 19:49:45,894 INFO L125 PetriNetUnfolderBase]: For 1745352/1745356 co-relation queries the response was YES. [2024-06-03 19:49:45,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66997 conditions, 5433 events. 3384/5433 cut-off events. For 1745352/1745356 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33062 event pairs, 664 based on Foata normal form. 6/5438 useless extension candidates. Maximal degree in co-relation 66789. Up to 4823 conditions per place. [2024-06-03 19:49:45,996 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 584 selfloop transitions, 96 changer transitions 0/685 dead transitions. [2024-06-03 19:49:45,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 685 transitions, 10166 flow [2024-06-03 19:49:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:49:45,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 19:49:45,997 INFO L175 Difference]: Start difference. First operand has 452 places, 663 transitions, 8324 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:49:45,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 685 transitions, 10166 flow [2024-06-03 19:49:53,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 685 transitions, 9807 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 19:49:53,395 INFO L231 Difference]: Finished difference. Result has 453 places, 666 transitions, 8277 flow [2024-06-03 19:49:53,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7965, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8277, PETRI_PLACES=453, PETRI_TRANSITIONS=666} [2024-06-03 19:49:53,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-03 19:49:53,395 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 666 transitions, 8277 flow [2024-06-03 19:49:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:53,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:53,395 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] [2024-06-03 19:49:53,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 19:49:53,396 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)] === [2024-06-03 19:49:53,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1130872882, now seen corresponding path program 18 times [2024-06-03 19:49:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:53,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539581186] [2024-06-03 19:49:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:54,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:54,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539581186] [2024-06-03 19:49:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539581186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:54,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:54,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:54,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918226373] [2024-06-03 19:49:54,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:54,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:54,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:54,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:54,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:54,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:54,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 666 transitions, 8277 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:54,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:54,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:54,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:56,143 INFO L124 PetriNetUnfolderBase]: 3378/5420 cut-off events. [2024-06-03 19:49:56,143 INFO L125 PetriNetUnfolderBase]: For 1743904/1743904 co-relation queries the response was YES. [2024-06-03 19:49:56,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66470 conditions, 5420 events. 3378/5420 cut-off events. For 1743904/1743904 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 32868 event pairs, 674 based on Foata normal form. 2/5421 useless extension candidates. Maximal degree in co-relation 66261. Up to 4558 conditions per place. [2024-06-03 19:49:56,252 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 528 selfloop transitions, 151 changer transitions 0/684 dead transitions. [2024-06-03 19:49:56,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 684 transitions, 9713 flow [2024-06-03 19:49:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:49:56,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:49:56,253 INFO L175 Difference]: Start difference. First operand has 453 places, 666 transitions, 8277 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:49:56,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 684 transitions, 9713 flow [2024-06-03 19:50:04,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 684 transitions, 9293 flow, removed 127 selfloop flow, removed 6 redundant places. [2024-06-03 19:50:04,059 INFO L231 Difference]: Finished difference. Result has 456 places, 666 transitions, 8165 flow [2024-06-03 19:50:04,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7857, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8165, PETRI_PLACES=456, PETRI_TRANSITIONS=666} [2024-06-03 19:50:04,060 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 412 predicate places. [2024-06-03 19:50:04,060 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 666 transitions, 8165 flow [2024-06-03 19:50:04,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:04,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:04,060 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] [2024-06-03 19:50:04,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 19:50:04,060 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)] === [2024-06-03 19:50:04,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:04,061 INFO L85 PathProgramCache]: Analyzing trace with hash -110278269, now seen corresponding path program 8 times [2024-06-03 19:50:04,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:04,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738126153] [2024-06-03 19:50:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:04,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:05,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:05,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738126153] [2024-06-03 19:50:05,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738126153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:05,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:05,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:05,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491347622] [2024-06-03 19:50:05,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:05,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:05,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:05,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:05,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:05,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:05,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 666 transitions, 8165 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:05,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:05,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:05,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:07,060 INFO L124 PetriNetUnfolderBase]: 3372/5417 cut-off events. [2024-06-03 19:50:07,060 INFO L125 PetriNetUnfolderBase]: For 1740321/1740325 co-relation queries the response was YES. [2024-06-03 19:50:07,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66079 conditions, 5417 events. 3372/5417 cut-off events. For 1740321/1740325 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 32946 event pairs, 625 based on Foata normal form. 6/5422 useless extension candidates. Maximal degree in co-relation 65869. Up to 4810 conditions per place. [2024-06-03 19:50:07,154 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 586 selfloop transitions, 93 changer transitions 0/684 dead transitions. [2024-06-03 19:50:07,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 684 transitions, 9601 flow [2024-06-03 19:50:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:50:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:50:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-03 19:50:07,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-03 19:50:07,155 INFO L175 Difference]: Start difference. First operand has 456 places, 666 transitions, 8165 flow. Second operand 10 states and 173 transitions. [2024-06-03 19:50:07,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 684 transitions, 9601 flow [2024-06-03 19:50:14,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 684 transitions, 9197 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-03 19:50:14,523 INFO L231 Difference]: Finished difference. Result has 458 places, 666 transitions, 7953 flow [2024-06-03 19:50:14,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7953, PETRI_PLACES=458, PETRI_TRANSITIONS=666} [2024-06-03 19:50:14,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-03 19:50:14,524 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 666 transitions, 7953 flow [2024-06-03 19:50:14,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:14,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:14,524 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] [2024-06-03 19:50:14,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 19:50:14,525 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)] === [2024-06-03 19:50:14,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:14,525 INFO L85 PathProgramCache]: Analyzing trace with hash -677254116, now seen corresponding path program 19 times [2024-06-03 19:50:14,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:14,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003871655] [2024-06-03 19:50:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:14,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:15,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003871655] [2024-06-03 19:50:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003871655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:15,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:15,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:15,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702298054] [2024-06-03 19:50:15,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:15,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:15,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:15,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:15,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 666 transitions, 7953 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:15,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:15,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:15,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:17,227 INFO L124 PetriNetUnfolderBase]: 3422/5501 cut-off events. [2024-06-03 19:50:17,227 INFO L125 PetriNetUnfolderBase]: For 1831659/1831661 co-relation queries the response was YES. [2024-06-03 19:50:17,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68356 conditions, 5501 events. 3422/5501 cut-off events. For 1831659/1831661 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 33578 event pairs, 703 based on Foata normal form. 4/5504 useless extension candidates. Maximal degree in co-relation 68145. Up to 4192 conditions per place. [2024-06-03 19:50:17,329 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 260 changer transitions 0/697 dead transitions. [2024-06-03 19:50:17,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 697 transitions, 11121 flow [2024-06-03 19:50:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:50:17,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:50:17,330 INFO L175 Difference]: Start difference. First operand has 458 places, 666 transitions, 7953 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:50:17,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 697 transitions, 11121 flow [2024-06-03 19:50:25,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 697 transitions, 10957 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:50:25,246 INFO L231 Difference]: Finished difference. Result has 459 places, 678 transitions, 9145 flow [2024-06-03 19:50:25,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9145, PETRI_PLACES=459, PETRI_TRANSITIONS=678} [2024-06-03 19:50:25,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-03 19:50:25,247 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 678 transitions, 9145 flow [2024-06-03 19:50:25,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:25,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:25,247 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] [2024-06-03 19:50:25,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 19:50:25,247 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:25,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1574779210, now seen corresponding path program 20 times [2024-06-03 19:50:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:25,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338624420] [2024-06-03 19:50:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:26,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:26,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338624420] [2024-06-03 19:50:26,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338624420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:26,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:26,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:26,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579253862] [2024-06-03 19:50:26,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:26,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:26,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:26,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:26,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:26,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:26,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 678 transitions, 9145 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:26,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:26,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:26,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:28,077 INFO L124 PetriNetUnfolderBase]: 3448/5539 cut-off events. [2024-06-03 19:50:28,077 INFO L125 PetriNetUnfolderBase]: For 1897658/1897660 co-relation queries the response was YES. [2024-06-03 19:50:28,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70585 conditions, 5539 events. 3448/5539 cut-off events. For 1897658/1897660 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 33895 event pairs, 660 based on Foata normal form. 4/5542 useless extension candidates. Maximal degree in co-relation 70373. Up to 4217 conditions per place. [2024-06-03 19:50:28,188 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 433 selfloop transitions, 265 changer transitions 0/703 dead transitions. [2024-06-03 19:50:28,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 703 transitions, 11931 flow [2024-06-03 19:50:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:50:28,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:50:28,189 INFO L175 Difference]: Start difference. First operand has 459 places, 678 transitions, 9145 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:50:28,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 703 transitions, 11931 flow [2024-06-03 19:50:36,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 703 transitions, 11111 flow, removed 224 selfloop flow, removed 4 redundant places. [2024-06-03 19:50:36,100 INFO L231 Difference]: Finished difference. Result has 464 places, 684 transitions, 9285 flow [2024-06-03 19:50:36,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8427, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9285, PETRI_PLACES=464, PETRI_TRANSITIONS=684} [2024-06-03 19:50:36,101 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 420 predicate places. [2024-06-03 19:50:36,101 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 684 transitions, 9285 flow [2024-06-03 19:50:36,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:36,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:36,101 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] [2024-06-03 19:50:36,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 19:50:36,101 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:36,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash 787366114, now seen corresponding path program 21 times [2024-06-03 19:50:36,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:36,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526684644] [2024-06-03 19:50:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:36,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:37,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:37,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526684644] [2024-06-03 19:50:37,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526684644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:37,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:37,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:37,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124948107] [2024-06-03 19:50:37,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:37,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:37,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:37,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:37,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 684 transitions, 9285 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:37,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:37,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:37,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:38,937 INFO L124 PetriNetUnfolderBase]: 3458/5559 cut-off events. [2024-06-03 19:50:38,937 INFO L125 PetriNetUnfolderBase]: For 1887697/1887699 co-relation queries the response was YES. [2024-06-03 19:50:39,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69781 conditions, 5559 events. 3458/5559 cut-off events. For 1887697/1887699 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 34024 event pairs, 710 based on Foata normal form. 4/5562 useless extension candidates. Maximal degree in co-relation 69568. Up to 4227 conditions per place. [2024-06-03 19:50:39,044 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 420 selfloop transitions, 280 changer transitions 0/705 dead transitions. [2024-06-03 19:50:39,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 705 transitions, 11543 flow [2024-06-03 19:50:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:50:39,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:50:39,046 INFO L175 Difference]: Start difference. First operand has 464 places, 684 transitions, 9285 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:50:39,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 705 transitions, 11543 flow [2024-06-03 19:50:48,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 705 transitions, 10948 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-03 19:50:48,155 INFO L231 Difference]: Finished difference. Result has 469 places, 687 transitions, 9442 flow [2024-06-03 19:50:48,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9442, PETRI_PLACES=469, PETRI_TRANSITIONS=687} [2024-06-03 19:50:48,156 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-03 19:50:48,156 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 687 transitions, 9442 flow [2024-06-03 19:50:48,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:48,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:48,156 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] [2024-06-03 19:50:48,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 19:50:48,157 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:48,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:48,158 INFO L85 PathProgramCache]: Analyzing trace with hash 787377677, now seen corresponding path program 9 times [2024-06-03 19:50:48,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:48,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647558576] [2024-06-03 19:50:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:49,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:49,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647558576] [2024-06-03 19:50:49,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647558576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:49,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:49,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:49,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460470614] [2024-06-03 19:50:49,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:49,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:49,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:49,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:49,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:49,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:49,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 687 transitions, 9442 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:49,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:49,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:49,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:50,876 INFO L124 PetriNetUnfolderBase]: 3492/5596 cut-off events. [2024-06-03 19:50:50,876 INFO L125 PetriNetUnfolderBase]: For 1950183/1950189 co-relation queries the response was YES. [2024-06-03 19:50:50,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71012 conditions, 5596 events. 3492/5596 cut-off events. For 1950183/1950189 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34203 event pairs, 631 based on Foata normal form. 8/5603 useless extension candidates. Maximal degree in co-relation 70798. Up to 4708 conditions per place. [2024-06-03 19:50:50,993 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 560 selfloop transitions, 162 changer transitions 0/727 dead transitions. [2024-06-03 19:50:50,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 727 transitions, 12109 flow [2024-06-03 19:50:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:50:50,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:50:50,994 INFO L175 Difference]: Start difference. First operand has 469 places, 687 transitions, 9442 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:50:50,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 727 transitions, 12109 flow [2024-06-03 19:50:59,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 727 transitions, 11150 flow, removed 95 selfloop flow, removed 9 redundant places. [2024-06-03 19:50:59,678 INFO L231 Difference]: Finished difference. Result has 471 places, 709 transitions, 9531 flow [2024-06-03 19:50:59,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8483, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9531, PETRI_PLACES=471, PETRI_TRANSITIONS=709} [2024-06-03 19:50:59,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-03 19:50:59,679 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 709 transitions, 9531 flow [2024-06-03 19:50:59,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:59,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:59,679 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] [2024-06-03 19:50:59,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 19:50:59,679 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:59,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash 787377274, now seen corresponding path program 22 times [2024-06-03 19:50:59,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:59,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618270924] [2024-06-03 19:50:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:00,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618270924] [2024-06-03 19:51:00,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618270924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:00,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:00,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:00,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645189775] [2024-06-03 19:51:00,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:00,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:00,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:00,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:00,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:00,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:00,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 709 transitions, 9531 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:00,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:00,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:00,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:02,616 INFO L124 PetriNetUnfolderBase]: 3502/5620 cut-off events. [2024-06-03 19:51:02,616 INFO L125 PetriNetUnfolderBase]: For 1977552/1977554 co-relation queries the response was YES. [2024-06-03 19:51:02,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71076 conditions, 5620 events. 3502/5620 cut-off events. For 1977552/1977554 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34409 event pairs, 699 based on Foata normal form. 4/5623 useless extension candidates. Maximal degree in co-relation 70860. Up to 4284 conditions per place. [2024-06-03 19:51:02,723 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 441 selfloop transitions, 284 changer transitions 0/730 dead transitions. [2024-06-03 19:51:02,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 730 transitions, 11819 flow [2024-06-03 19:51:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:51:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:51:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 19:51:02,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-03 19:51:02,724 INFO L175 Difference]: Start difference. First operand has 471 places, 709 transitions, 9531 flow. Second operand 10 states and 181 transitions. [2024-06-03 19:51:02,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 730 transitions, 11819 flow [2024-06-03 19:51:11,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 730 transitions, 11548 flow, removed 118 selfloop flow, removed 3 redundant places. [2024-06-03 19:51:11,854 INFO L231 Difference]: Finished difference. Result has 478 places, 712 transitions, 9992 flow [2024-06-03 19:51:11,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9260, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9992, PETRI_PLACES=478, PETRI_TRANSITIONS=712} [2024-06-03 19:51:11,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-03 19:51:11,855 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 712 transitions, 9992 flow [2024-06-03 19:51:11,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:11,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:11,855 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] [2024-06-03 19:51:11,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 19:51:11,855 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:11,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash -408732147, now seen corresponding path program 10 times [2024-06-03 19:51:11,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:11,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707908815] [2024-06-03 19:51:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:11,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:13,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:13,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707908815] [2024-06-03 19:51:13,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707908815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:13,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:13,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:13,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490960467] [2024-06-03 19:51:13,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:13,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:13,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:13,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:13,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:13,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:13,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 712 transitions, 9992 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:13,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:13,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:13,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:14,923 INFO L124 PetriNetUnfolderBase]: 3512/5624 cut-off events. [2024-06-03 19:51:14,923 INFO L125 PetriNetUnfolderBase]: For 1983700/1983706 co-relation queries the response was YES. [2024-06-03 19:51:14,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71230 conditions, 5624 events. 3512/5624 cut-off events. For 1983700/1983706 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34313 event pairs, 631 based on Foata normal form. 8/5631 useless extension candidates. Maximal degree in co-relation 71012. Up to 4732 conditions per place. [2024-06-03 19:51:15,022 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 564 selfloop transitions, 165 changer transitions 0/734 dead transitions. [2024-06-03 19:51:15,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 734 transitions, 12274 flow [2024-06-03 19:51:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:51:15,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:51:15,023 INFO L175 Difference]: Start difference. First operand has 478 places, 712 transitions, 9992 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:51:15,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 734 transitions, 12274 flow [2024-06-03 19:51:25,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 734 transitions, 11580 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-03 19:51:25,566 INFO L231 Difference]: Finished difference. Result has 480 places, 716 transitions, 9774 flow [2024-06-03 19:51:25,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9298, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9774, PETRI_PLACES=480, PETRI_TRANSITIONS=716} [2024-06-03 19:51:25,567 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-03 19:51:25,567 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 716 transitions, 9774 flow [2024-06-03 19:51:25,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:25,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:25,567 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] [2024-06-03 19:51:25,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 19:51:25,567 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:25,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:25,567 INFO L85 PathProgramCache]: Analyzing trace with hash 517223076, now seen corresponding path program 23 times [2024-06-03 19:51:25,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:25,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905471602] [2024-06-03 19:51:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:25,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:26,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:26,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905471602] [2024-06-03 19:51:26,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905471602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:26,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:26,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:26,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942734640] [2024-06-03 19:51:26,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:26,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:26,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:26,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:26,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 716 transitions, 9774 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:26,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:26,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:26,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:28,554 INFO L124 PetriNetUnfolderBase]: 3506/5606 cut-off events. [2024-06-03 19:51:28,554 INFO L125 PetriNetUnfolderBase]: For 1978449/1978449 co-relation queries the response was YES. [2024-06-03 19:51:28,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70396 conditions, 5606 events. 3506/5606 cut-off events. For 1978449/1978449 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 34037 event pairs, 711 based on Foata normal form. 2/5607 useless extension candidates. Maximal degree in co-relation 70177. Up to 5060 conditions per place. [2024-06-03 19:51:28,671 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 638 selfloop transitions, 87 changer transitions 0/730 dead transitions. [2024-06-03 19:51:28,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 730 transitions, 11580 flow [2024-06-03 19:51:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:51:28,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 19:51:28,672 INFO L175 Difference]: Start difference. First operand has 480 places, 716 transitions, 9774 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:51:28,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 730 transitions, 11580 flow [2024-06-03 19:51:38,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 730 transitions, 11146 flow, removed 134 selfloop flow, removed 4 redundant places. [2024-06-03 19:51:38,707 INFO L231 Difference]: Finished difference. Result has 485 places, 716 transitions, 9520 flow [2024-06-03 19:51:38,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9520, PETRI_PLACES=485, PETRI_TRANSITIONS=716} [2024-06-03 19:51:38,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 441 predicate places. [2024-06-03 19:51:38,707 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 716 transitions, 9520 flow [2024-06-03 19:51:38,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:38,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:38,708 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] [2024-06-03 19:51:38,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 19:51:38,708 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:38,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:38,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2033900332, now seen corresponding path program 24 times [2024-06-03 19:51:38,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:38,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109416059] [2024-06-03 19:51:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:38,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:39,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:39,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109416059] [2024-06-03 19:51:39,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109416059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:39,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:39,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:39,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111639678] [2024-06-03 19:51:39,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:39,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:39,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:39,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:39,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:40,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:40,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 716 transitions, 9520 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:40,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:40,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:40,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:41,859 INFO L124 PetriNetUnfolderBase]: 3521/5635 cut-off events. [2024-06-03 19:51:41,859 INFO L125 PetriNetUnfolderBase]: For 1998886/1998886 co-relation queries the response was YES. [2024-06-03 19:51:41,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70312 conditions, 5635 events. 3521/5635 cut-off events. For 1998886/1998886 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34325 event pairs, 712 based on Foata normal form. 2/5636 useless extension candidates. Maximal degree in co-relation 70092. Up to 5074 conditions per place. [2024-06-03 19:51:41,961 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 640 selfloop transitions, 94 changer transitions 0/739 dead transitions. [2024-06-03 19:51:41,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 739 transitions, 11566 flow [2024-06-03 19:51:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:51:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:51:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-03 19:51:41,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974630021141649 [2024-06-03 19:51:41,962 INFO L175 Difference]: Start difference. First operand has 485 places, 716 transitions, 9520 flow. Second operand 11 states and 188 transitions. [2024-06-03 19:51:41,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 739 transitions, 11566 flow [2024-06-03 19:51:51,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 739 transitions, 11153 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-03 19:51:51,658 INFO L231 Difference]: Finished difference. Result has 486 places, 722 transitions, 9509 flow [2024-06-03 19:51:51,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9126, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9509, PETRI_PLACES=486, PETRI_TRANSITIONS=722} [2024-06-03 19:51:51,659 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-03 19:51:51,659 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 722 transitions, 9509 flow [2024-06-03 19:51:51,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:51,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:51,659 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] [2024-06-03 19:51:51,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 19:51:51,660 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:51,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 800264687, now seen corresponding path program 11 times [2024-06-03 19:51:51,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:51,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115499140] [2024-06-03 19:51:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:51,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:52,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115499140] [2024-06-03 19:51:52,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115499140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:52,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:52,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:52,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398382363] [2024-06-03 19:51:52,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:52,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:52,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:52,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:52,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 722 transitions, 9509 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:52,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:52,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:52,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:54,650 INFO L124 PetriNetUnfolderBase]: 3547/5681 cut-off events. [2024-06-03 19:51:54,650 INFO L125 PetriNetUnfolderBase]: For 2050014/2050020 co-relation queries the response was YES. [2024-06-03 19:51:54,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70884 conditions, 5681 events. 3547/5681 cut-off events. For 2050014/2050020 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 34790 event pairs, 675 based on Foata normal form. 8/5688 useless extension candidates. Maximal degree in co-relation 70665. Up to 4770 conditions per place. [2024-06-03 19:51:54,768 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 568 selfloop transitions, 174 changer transitions 0/747 dead transitions. [2024-06-03 19:51:54,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 747 transitions, 11939 flow [2024-06-03 19:51:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:51:54,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:51:54,769 INFO L175 Difference]: Start difference. First operand has 486 places, 722 transitions, 9509 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:51:54,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 747 transitions, 11939 flow [2024-06-03 19:52:05,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 747 transitions, 11607 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-03 19:52:05,895 INFO L231 Difference]: Finished difference. Result has 487 places, 729 transitions, 9781 flow [2024-06-03 19:52:05,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9177, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9781, PETRI_PLACES=487, PETRI_TRANSITIONS=729} [2024-06-03 19:52:05,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-03 19:52:05,896 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 729 transitions, 9781 flow [2024-06-03 19:52:05,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:05,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:05,897 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] [2024-06-03 19:52:05,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 19:52:05,897 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:05,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash 800264284, now seen corresponding path program 25 times [2024-06-03 19:52:05,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:05,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241099775] [2024-06-03 19:52:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:05,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:07,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:07,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241099775] [2024-06-03 19:52:07,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241099775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:07,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:07,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:07,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993653219] [2024-06-03 19:52:07,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:07,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:07,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:07,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:07,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:07,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 729 transitions, 9781 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:07,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:07,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:07,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:09,364 INFO L124 PetriNetUnfolderBase]: 3557/5723 cut-off events. [2024-06-03 19:52:09,364 INFO L125 PetriNetUnfolderBase]: For 2075772/2075774 co-relation queries the response was YES. [2024-06-03 19:52:09,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71414 conditions, 5723 events. 3557/5723 cut-off events. For 2075772/2075774 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35324 event pairs, 694 based on Foata normal form. 4/5726 useless extension candidates. Maximal degree in co-relation 71194. Up to 4353 conditions per place. [2024-06-03 19:52:09,533 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 441 selfloop transitions, 303 changer transitions 0/749 dead transitions. [2024-06-03 19:52:09,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 749 transitions, 11816 flow [2024-06-03 19:52:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:52:09,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:52:09,535 INFO L175 Difference]: Start difference. First operand has 487 places, 729 transitions, 9781 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:52:09,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 749 transitions, 11816 flow [2024-06-03 19:52:17,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 749 transitions, 11449 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:17,639 INFO L231 Difference]: Finished difference. Result has 492 places, 732 transitions, 10187 flow [2024-06-03 19:52:17,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9414, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10187, PETRI_PLACES=492, PETRI_TRANSITIONS=732} [2024-06-03 19:52:17,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 448 predicate places. [2024-06-03 19:52:17,640 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 732 transitions, 10187 flow [2024-06-03 19:52:17,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:17,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:17,640 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] [2024-06-03 19:52:17,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 19:52:17,640 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:17,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash 800710157, now seen corresponding path program 12 times [2024-06-03 19:52:17,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:17,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576323568] [2024-06-03 19:52:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:18,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576323568] [2024-06-03 19:52:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576323568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:18,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:18,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:18,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607475670] [2024-06-03 19:52:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:18,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:18,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 732 transitions, 10187 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:18,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:18,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:18,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:20,844 INFO L124 PetriNetUnfolderBase]: 3551/5697 cut-off events. [2024-06-03 19:52:20,845 INFO L125 PetriNetUnfolderBase]: For 2074026/2074032 co-relation queries the response was YES. [2024-06-03 19:52:20,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71452 conditions, 5697 events. 3551/5697 cut-off events. For 2074026/2074032 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35046 event pairs, 630 based on Foata normal form. 8/5704 useless extension candidates. Maximal degree in co-relation 71231. Up to 4779 conditions per place. [2024-06-03 19:52:20,953 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 567 selfloop transitions, 177 changer transitions 0/749 dead transitions. [2024-06-03 19:52:20,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 749 transitions, 12063 flow [2024-06-03 19:52:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:52:21,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:52:21,032 INFO L175 Difference]: Start difference. First operand has 492 places, 732 transitions, 10187 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:52:21,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 749 transitions, 12063 flow [2024-06-03 19:52:30,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 749 transitions, 11326 flow, removed 119 selfloop flow, removed 6 redundant places. [2024-06-03 19:52:30,370 INFO L231 Difference]: Finished difference. Result has 495 places, 732 transitions, 9810 flow [2024-06-03 19:52:30,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9450, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9810, PETRI_PLACES=495, PETRI_TRANSITIONS=732} [2024-06-03 19:52:30,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-03 19:52:30,371 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 732 transitions, 9810 flow [2024-06-03 19:52:30,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:30,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:30,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:30,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 19:52:30,371 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:30,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash -401113587, now seen corresponding path program 13 times [2024-06-03 19:52:30,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:30,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010634015] [2024-06-03 19:52:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:30,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:31,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:31,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010634015] [2024-06-03 19:52:31,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010634015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:31,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:31,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:31,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783168266] [2024-06-03 19:52:31,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:31,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:31,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:31,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:31,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:31,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:31,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 732 transitions, 9810 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:31,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:31,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:31,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:33,673 INFO L124 PetriNetUnfolderBase]: 3577/5723 cut-off events. [2024-06-03 19:52:33,673 INFO L125 PetriNetUnfolderBase]: For 2122243/2122249 co-relation queries the response was YES. [2024-06-03 19:52:33,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71751 conditions, 5723 events. 3577/5723 cut-off events. For 2122243/2122249 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35135 event pairs, 666 based on Foata normal form. 8/5730 useless extension candidates. Maximal degree in co-relation 71529. Up to 4804 conditions per place. [2024-06-03 19:52:33,779 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 571 selfloop transitions, 181 changer transitions 0/757 dead transitions. [2024-06-03 19:52:33,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 757 transitions, 12306 flow [2024-06-03 19:52:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:52:33,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:52:33,781 INFO L175 Difference]: Start difference. First operand has 495 places, 732 transitions, 9810 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:52:33,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 757 transitions, 12306 flow [2024-06-03 19:52:44,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 757 transitions, 11948 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:52:44,250 INFO L231 Difference]: Finished difference. Result has 497 places, 739 transitions, 10104 flow [2024-06-03 19:52:44,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9466, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10104, PETRI_PLACES=497, PETRI_TRANSITIONS=739} [2024-06-03 19:52:44,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 453 predicate places. [2024-06-03 19:52:44,251 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 739 transitions, 10104 flow [2024-06-03 19:52:44,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:44,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:44,251 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] [2024-06-03 19:52:44,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 19:52:44,251 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:44,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:44,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1525763904, now seen corresponding path program 26 times [2024-06-03 19:52:44,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:44,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217673267] [2024-06-03 19:52:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:44,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:45,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:45,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217673267] [2024-06-03 19:52:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217673267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:45,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:45,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:45,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839833600] [2024-06-03 19:52:45,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:45,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:45,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:45,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:45,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:45,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:45,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 739 transitions, 10104 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:45,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:45,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:45,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:47,820 INFO L124 PetriNetUnfolderBase]: 3587/5733 cut-off events. [2024-06-03 19:52:47,820 INFO L125 PetriNetUnfolderBase]: For 2148328/2148328 co-relation queries the response was YES. [2024-06-03 19:52:47,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72188 conditions, 5733 events. 3587/5733 cut-off events. For 2148328/2148328 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 34989 event pairs, 727 based on Foata normal form. 2/5734 useless extension candidates. Maximal degree in co-relation 71965. Up to 5191 conditions per place. [2024-06-03 19:52:47,925 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 665 selfloop transitions, 84 changer transitions 0/754 dead transitions. [2024-06-03 19:52:47,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 754 transitions, 11806 flow [2024-06-03 19:52:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:52:47,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:52:47,926 INFO L175 Difference]: Start difference. First operand has 497 places, 739 transitions, 10104 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:52:47,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 754 transitions, 11806 flow [2024-06-03 19:52:59,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 754 transitions, 11403 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-03 19:52:59,528 INFO L231 Difference]: Finished difference. Result has 501 places, 742 transitions, 10045 flow [2024-06-03 19:52:59,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9701, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10045, PETRI_PLACES=501, PETRI_TRANSITIONS=742} [2024-06-03 19:52:59,529 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 457 predicate places. [2024-06-03 19:52:59,529 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 742 transitions, 10045 flow [2024-06-03 19:52:59,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:59,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:59,529 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] [2024-06-03 19:52:59,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 19:52:59,529 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:59,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:59,529 INFO L85 PathProgramCache]: Analyzing trace with hash -401380497, now seen corresponding path program 14 times [2024-06-03 19:52:59,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:59,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131580779] [2024-06-03 19:52:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:59,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:00,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:00,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131580779] [2024-06-03 19:53:00,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131580779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:00,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:00,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:00,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673293177] [2024-06-03 19:53:00,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:00,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:00,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:00,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:00,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:00,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:53:00,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 742 transitions, 10045 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:00,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:00,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:53:00,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:02,866 INFO L124 PetriNetUnfolderBase]: 3581/5731 cut-off events. [2024-06-03 19:53:02,866 INFO L125 PetriNetUnfolderBase]: For 2144752/2144758 co-relation queries the response was YES. [2024-06-03 19:53:02,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71506 conditions, 5731 events. 3581/5731 cut-off events. For 2144752/2144758 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35168 event pairs, 670 based on Foata normal form. 8/5738 useless extension candidates. Maximal degree in co-relation 71282. Up to 4813 conditions per place. [2024-06-03 19:53:02,984 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 576 selfloop transitions, 178 changer transitions 0/759 dead transitions. [2024-06-03 19:53:02,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 759 transitions, 11947 flow [2024-06-03 19:53:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:53:02,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:53:02,985 INFO L175 Difference]: Start difference. First operand has 501 places, 742 transitions, 10045 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:53:02,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 759 transitions, 11947 flow [2024-06-03 19:53:13,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 759 transitions, 11539 flow, removed 123 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:13,382 INFO L231 Difference]: Finished difference. Result has 504 places, 742 transitions, 9999 flow [2024-06-03 19:53:13,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9637, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9999, PETRI_PLACES=504, PETRI_TRANSITIONS=742} [2024-06-03 19:53:13,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 460 predicate places. [2024-06-03 19:53:13,383 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 742 transitions, 9999 flow [2024-06-03 19:53:13,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:13,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:13,383 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] [2024-06-03 19:53:13,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 19:53:13,383 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:13,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash -731168398, now seen corresponding path program 27 times [2024-06-03 19:53:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:13,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133426340] [2024-06-03 19:53:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:14,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:14,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133426340] [2024-06-03 19:53:14,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133426340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:14,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:14,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:14,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358907493] [2024-06-03 19:53:14,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:14,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:14,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:14,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:14,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:14,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:53:14,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 742 transitions, 9999 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:14,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:14,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:53:14,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:16,708 INFO L124 PetriNetUnfolderBase]: 3575/5717 cut-off events. [2024-06-03 19:53:16,708 INFO L125 PetriNetUnfolderBase]: For 2138497/2138497 co-relation queries the response was YES. [2024-06-03 19:53:16,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71197 conditions, 5717 events. 3575/5717 cut-off events. For 2138497/2138497 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 34901 event pairs, 722 based on Foata normal form. 2/5718 useless extension candidates. Maximal degree in co-relation 70972. Up to 5175 conditions per place. [2024-06-03 19:53:16,812 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 655 selfloop transitions, 94 changer transitions 0/754 dead transitions. [2024-06-03 19:53:16,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 754 transitions, 11537 flow [2024-06-03 19:53:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 19:53:16,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-03 19:53:16,813 INFO L175 Difference]: Start difference. First operand has 504 places, 742 transitions, 9999 flow. Second operand 9 states and 155 transitions. [2024-06-03 19:53:16,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 754 transitions, 11537 flow [2024-06-03 19:53:27,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 754 transitions, 11122 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:27,143 INFO L231 Difference]: Finished difference. Result has 508 places, 742 transitions, 9778 flow [2024-06-03 19:53:27,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9778, PETRI_PLACES=508, PETRI_TRANSITIONS=742} [2024-06-03 19:53:27,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 464 predicate places. [2024-06-03 19:53:27,144 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 742 transitions, 9778 flow [2024-06-03 19:53:27,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:27,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:27,144 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] [2024-06-03 19:53:27,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 19:53:27,144 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:27,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash -901866178, now seen corresponding path program 28 times [2024-06-03 19:53:27,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:27,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36556836] [2024-06-03 19:53:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:27,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15