./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.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/mix028_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.i ./goblint.2024-05-21_14-57-05.files/protection/mix028_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:14:47,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:14:48,046 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:14:48,051 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:14:48,051 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:14:48,076 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:14:48,076 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:14:48,077 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:14:48,077 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:14:48,080 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:14:48,080 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:14:48,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:14:48,081 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:14:48,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:14:48,082 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:14:48,082 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:14:48,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:14:48,083 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:14:48,083 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:14:48,083 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:14:48,083 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:14:48,084 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:14:48,084 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:14:48,084 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:14:48,084 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:14:48,084 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:14:48,084 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:14:48,084 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:14:48,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:14:48,085 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:14:48,086 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:14:48,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:14:48,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:14:48,086 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:14:48,086 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:14:48,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:14:48,087 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:14:48,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:14:48,087 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:14:48,087 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:14:48,087 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:14:48,087 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:14:48,087 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:14:48,087 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:14:48,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:14:48,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:14:48,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:14:48,313 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:14:48,321 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:14:48,322 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-14 12:14:49,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:14:49,601 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:14:49,602 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-14 12:14:49,615 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8492f12c/02b9bee0e09c4fe4b39759421d0e72be/FLAG7c6760b8e [2024-06-14 12:14:49,627 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8492f12c/02b9bee0e09c4fe4b39759421d0e72be [2024-06-14 12:14:49,629 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:14:49,630 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:14:49,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix028_tso.yml/witness.yml [2024-06-14 12:14:49,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:14:49,752 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:14:49,753 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:14:49,753 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:14:49,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:14:49,757 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:14:49" (1/2) ... [2024-06-14 12:14:49,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570d9fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:49, skipping insertion in model container [2024-06-14 12:14:49,759 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:14:49" (1/2) ... [2024-06-14 12:14:49,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@12cd896e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:49, skipping insertion in model container [2024-06-14 12:14:49,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:14:49" (2/2) ... [2024-06-14 12:14:49,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570d9fb0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:49, skipping insertion in model container [2024-06-14 12:14:49,761 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:14:49" (2/2) ... [2024-06-14 12:14:49,761 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:14:49,833 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:14:49,837 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-14 12:14:49,838 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-14 12:14:49,838 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-14 12:14:49,839 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:14:49,839 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-14 12:14:49,877 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:14:50,152 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:14:50,166 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:14:50,296 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:14:50,320 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:14:50,321 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50 WrapperNode [2024-06-14 12:14:50,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:14:50,322 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:14:50,322 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:14:50,322 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:14:50,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,339 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,370 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-14 12:14:50,371 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:14:50,371 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:14:50,371 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:14:50,372 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:14:50,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,384 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,396 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:14:50,396 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,397 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,405 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,414 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,415 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,418 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:14:50,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:14:50,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:14:50,423 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:14:50,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (1/1) ... [2024-06-14 12:14:50,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:14:50,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:14:50,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:14:50,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:14:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:14:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:14:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:14:50,572 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:14:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:14:50,572 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:14:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:14:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:14:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:14:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:14:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:14:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:14:50,574 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:14:50,716 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:14:50,718 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:14:50,997 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:14:50,997 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:14:51,108 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:14:51,108 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:14:51,109 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:14:51 BoogieIcfgContainer [2024-06-14 12:14:51,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:14:51,110 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:14:51,110 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:14:51,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:14:51,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:14:49" (1/4) ... [2024-06-14 12:14:51,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7755010c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:14:51, skipping insertion in model container [2024-06-14 12:14:51,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:14:49" (2/4) ... [2024-06-14 12:14:51,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7755010c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:14:51, skipping insertion in model container [2024-06-14 12:14:51,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:50" (3/4) ... [2024-06-14 12:14:51,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7755010c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:14:51, skipping insertion in model container [2024-06-14 12:14:51,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:14:51" (4/4) ... [2024-06-14 12:14:51,115 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_tso.i [2024-06-14 12:14:51,128 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:14:51,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:14:51,129 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:14:51,200 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:14:51,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:14:51,260 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 12:14:51,261 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:14:51,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:14:51,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:14:51,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 12:14:51,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:14:51,277 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;@760160e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:14:51,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:14:51,280 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:14:51,280 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:14:51,281 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:14:51,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:51,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:14:51,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:51,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash -492059225, now seen corresponding path program 1 times [2024-06-14 12:14:51,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:51,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702319619] [2024-06-14 12:14:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:51,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:52,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:52,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702319619] [2024-06-14 12:14:52,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702319619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:52,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:52,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:14:52,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788628949] [2024-06-14 12:14:52,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:52,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:14:52,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:52,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:14:52,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:14:52,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:14:52,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:52,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:52,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:14:52,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:52,798 INFO L124 PetriNetUnfolderBase]: 1359/2110 cut-off events. [2024-06-14 12:14:52,798 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 12:14:52,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4226 conditions, 2110 events. 1359/2110 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10225 event pairs, 941 based on Foata normal form. 1/2045 useless extension candidates. Maximal degree in co-relation 4211. Up to 2029 conditions per place. [2024-06-14 12:14:52,813 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 12:14:52,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-14 12:14:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:14:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:14:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-14 12:14:52,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 12:14:52,824 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-14 12:14:52,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-14 12:14:52,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:52,829 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 12:14:52,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 12:14:52,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 12:14:52,834 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 12:14:52,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:52,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:52,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:52,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:14:52,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:52,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash -422483706, now seen corresponding path program 1 times [2024-06-14 12:14:52,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:52,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116607444] [2024-06-14 12:14:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:52,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:53,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:53,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116607444] [2024-06-14 12:14:53,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116607444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:53,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:53,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:14:53,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660913245] [2024-06-14 12:14:53,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:53,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:14:53,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:14:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:14:53,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:53,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:53,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:53,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:53,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:53,733 INFO L124 PetriNetUnfolderBase]: 1560/2338 cut-off events. [2024-06-14 12:14:53,734 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-06-14 12:14:53,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5356 conditions, 2338 events. 1560/2338 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11019 event pairs, 930 based on Foata normal form. 3/2339 useless extension candidates. Maximal degree in co-relation 5341. Up to 2302 conditions per place. [2024-06-14 12:14:53,745 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 12:14:53,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 246 flow [2024-06-14 12:14:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:14:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:14:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-14 12:14:53,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 12:14:53,747 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 88 transitions. [2024-06-14 12:14:53,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 246 flow [2024-06-14 12:14:53,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:14:53,749 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 12:14:53,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 12:14:53,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 12:14:53,750 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 12:14:53,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:53,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:53,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:53,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:14:53,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:53,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:53,751 INFO L85 PathProgramCache]: Analyzing trace with hash -212092032, now seen corresponding path program 1 times [2024-06-14 12:14:53,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:53,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718826123] [2024-06-14 12:14:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:53,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:54,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:54,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718826123] [2024-06-14 12:14:54,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718826123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:54,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:54,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:14:54,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419526760] [2024-06-14 12:14:54,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:54,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:14:54,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:54,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:14:54,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:14:54,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:54,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:54,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:54,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:54,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:54,802 INFO L124 PetriNetUnfolderBase]: 1568/2358 cut-off events. [2024-06-14 12:14:54,803 INFO L125 PetriNetUnfolderBase]: For 1342/1342 co-relation queries the response was YES. [2024-06-14 12:14:54,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5993 conditions, 2358 events. 1568/2358 cut-off events. For 1342/1342 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11232 event pairs, 669 based on Foata normal form. 5/2360 useless extension candidates. Maximal degree in co-relation 5976. Up to 2248 conditions per place. [2024-06-14 12:14:54,815 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-14 12:14:54,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 400 flow [2024-06-14 12:14:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:14:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:14:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 12:14:54,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 12:14:54,820 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 115 transitions. [2024-06-14 12:14:54,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 400 flow [2024-06-14 12:14:54,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:14:54,823 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-14 12:14:54,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-14 12:14:54,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-14 12:14:54,825 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-14 12:14:54,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:54,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:54,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:54,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:14:54,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:54,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:54,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1956947905, now seen corresponding path program 1 times [2024-06-14 12:14:54,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:54,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300924050] [2024-06-14 12:14:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:54,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:55,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:55,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300924050] [2024-06-14 12:14:55,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300924050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:55,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:55,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:14:55,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872421524] [2024-06-14 12:14:55,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:55,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:14:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:55,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:14:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:14:55,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:55,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:55,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:55,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:55,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:55,991 INFO L124 PetriNetUnfolderBase]: 1580/2378 cut-off events. [2024-06-14 12:14:55,991 INFO L125 PetriNetUnfolderBase]: For 3188/3191 co-relation queries the response was YES. [2024-06-14 12:14:55,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7137 conditions, 2378 events. 1580/2378 cut-off events. For 3188/3191 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11316 event pairs, 481 based on Foata normal form. 12/2387 useless extension candidates. Maximal degree in co-relation 7117. Up to 2216 conditions per place. [2024-06-14 12:14:56,004 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-14 12:14:56,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 503 flow [2024-06-14 12:14:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-14 12:14:56,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-14 12:14:56,006 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 131 transitions. [2024-06-14 12:14:56,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 503 flow [2024-06-14 12:14:56,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 495 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:14:56,010 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-14 12:14:56,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-14 12:14:56,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-14 12:14:56,011 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-14 12:14:56,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:56,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:56,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:56,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:14:56,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:56,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1897621729, now seen corresponding path program 1 times [2024-06-14 12:14:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:56,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712251670] [2024-06-14 12:14:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:56,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:56,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:56,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712251670] [2024-06-14 12:14:56,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712251670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:56,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:56,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:14:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791827383] [2024-06-14 12:14:56,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:56,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:14:56,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:56,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:14:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:14:56,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:56,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:56,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:56,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:56,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:57,039 INFO L124 PetriNetUnfolderBase]: 1368/2119 cut-off events. [2024-06-14 12:14:57,039 INFO L125 PetriNetUnfolderBase]: For 4021/4021 co-relation queries the response was YES. [2024-06-14 12:14:57,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6891 conditions, 2119 events. 1368/2119 cut-off events. For 4021/4021 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10360 event pairs, 562 based on Foata normal form. 2/2099 useless extension candidates. Maximal degree in co-relation 6868. Up to 2036 conditions per place. [2024-06-14 12:14:57,052 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 50 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-06-14 12:14:57,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 437 flow [2024-06-14 12:14:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:14:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:14:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 12:14:57,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-14 12:14:57,053 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 91 transitions. [2024-06-14 12:14:57,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 437 flow [2024-06-14 12:14:57,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 387 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:57,061 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-14 12:14:57,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-14 12:14:57,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-14 12:14:57,063 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-14 12:14:57,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:57,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:57,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:57,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:14:57,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:57,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1304420413, now seen corresponding path program 1 times [2024-06-14 12:14:57,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:57,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068654122] [2024-06-14 12:14:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:57,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:57,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:57,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068654122] [2024-06-14 12:14:57,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068654122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:57,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:57,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:57,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349482360] [2024-06-14 12:14:57,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:57,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:57,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:57,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:57,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:57,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:57,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:57,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:57,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:58,283 INFO L124 PetriNetUnfolderBase]: 1358/2141 cut-off events. [2024-06-14 12:14:58,283 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2024-06-14 12:14:58,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6909 conditions, 2141 events. 1358/2141 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10489 event pairs, 526 based on Foata normal form. 4/2135 useless extension candidates. Maximal degree in co-relation 6884. Up to 2004 conditions per place. [2024-06-14 12:14:58,295 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-14 12:14:58,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 457 flow [2024-06-14 12:14:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:14:58,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:14:58,297 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:14:58,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 457 flow [2024-06-14 12:14:58,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 435 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:58,301 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-14 12:14:58,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-14 12:14:58,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-14 12:14:58,304 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-14 12:14:58,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:58,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:58,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:58,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:14:58,304 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:58,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1082209242, now seen corresponding path program 1 times [2024-06-14 12:14:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:58,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856769185] [2024-06-14 12:14:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:58,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:58,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:58,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856769185] [2024-06-14 12:14:58,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856769185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:58,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:58,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:58,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801757272] [2024-06-14 12:14:58,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:58,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:58,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:58,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:58,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:59,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:59,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:59,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:59,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:59,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:59,474 INFO L124 PetriNetUnfolderBase]: 1571/2366 cut-off events. [2024-06-14 12:14:59,474 INFO L125 PetriNetUnfolderBase]: For 7236/7242 co-relation queries the response was YES. [2024-06-14 12:14:59,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 2366 events. 1571/2366 cut-off events. For 7236/7242 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11159 event pairs, 635 based on Foata normal form. 8/2371 useless extension candidates. Maximal degree in co-relation 8316. Up to 2253 conditions per place. [2024-06-14 12:14:59,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 19 changer transitions 0/78 dead transitions. [2024-06-14 12:14:59,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 543 flow [2024-06-14 12:14:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:14:59,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:14:59,486 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:14:59,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 543 flow [2024-06-14 12:14:59,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 513 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:59,490 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-14 12:14:59,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-14 12:14:59,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-14 12:14:59,490 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-14 12:14:59,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:59,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:59,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:59,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:14:59,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:59,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1746584512, now seen corresponding path program 2 times [2024-06-14 12:14:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:59,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697805561] [2024-06-14 12:14:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:00,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:00,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697805561] [2024-06-14 12:15:00,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697805561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:00,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:00,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:00,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777366242] [2024-06-14 12:15:00,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:00,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:00,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:00,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:00,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:00,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:00,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:00,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:00,650 INFO L124 PetriNetUnfolderBase]: 1559/2339 cut-off events. [2024-06-14 12:15:00,651 INFO L125 PetriNetUnfolderBase]: For 8650/8654 co-relation queries the response was YES. [2024-06-14 12:15:00,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8510 conditions, 2339 events. 1559/2339 cut-off events. For 8650/8654 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10950 event pairs, 649 based on Foata normal form. 3/2335 useless extension candidates. Maximal degree in co-relation 8484. Up to 2237 conditions per place. [2024-06-14 12:15:00,666 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 49 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2024-06-14 12:15:00,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 517 flow [2024-06-14 12:15:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:15:00,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-14 12:15:00,671 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:15:00,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 517 flow [2024-06-14 12:15:00,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 488 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:00,676 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 360 flow [2024-06-14 12:15:00,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-14 12:15:00,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-14 12:15:00,677 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 360 flow [2024-06-14 12:15:00,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:00,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:00,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:00,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:15:00,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:00,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:00,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1366003396, now seen corresponding path program 1 times [2024-06-14 12:15:00,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:00,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063448679] [2024-06-14 12:15:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:00,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:01,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:01,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063448679] [2024-06-14 12:15:01,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063448679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:01,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:01,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:01,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723057753] [2024-06-14 12:15:01,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:01,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:01,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:01,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:01,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:01,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:01,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:01,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:01,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:01,950 INFO L124 PetriNetUnfolderBase]: 1733/2610 cut-off events. [2024-06-14 12:15:01,950 INFO L125 PetriNetUnfolderBase]: For 11532/11532 co-relation queries the response was YES. [2024-06-14 12:15:01,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9886 conditions, 2610 events. 1733/2610 cut-off events. For 11532/11532 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12474 event pairs, 547 based on Foata normal form. 8/2613 useless extension candidates. Maximal degree in co-relation 9859. Up to 2237 conditions per place. [2024-06-14 12:15:01,965 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 80 selfloop transitions, 39 changer transitions 0/123 dead transitions. [2024-06-14 12:15:01,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 123 transitions, 999 flow [2024-06-14 12:15:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:15:01,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 12:15:01,967 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 360 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:15:01,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 123 transitions, 999 flow [2024-06-14 12:15:01,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 123 transitions, 873 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:01,977 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 581 flow [2024-06-14 12:15:01,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=581, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2024-06-14 12:15:01,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-14 12:15:01,978 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 581 flow [2024-06-14 12:15:01,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:01,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:01,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:01,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:15:01,978 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:01,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:01,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1268731286, now seen corresponding path program 2 times [2024-06-14 12:15:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:01,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728894024] [2024-06-14 12:15:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:01,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:02,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:02,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728894024] [2024-06-14 12:15:02,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728894024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:02,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:02,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:02,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893063530] [2024-06-14 12:15:02,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:02,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:02,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:02,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:02,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:02,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:02,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:02,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:03,287 INFO L124 PetriNetUnfolderBase]: 1805/2712 cut-off events. [2024-06-14 12:15:03,287 INFO L125 PetriNetUnfolderBase]: For 15092/15094 co-relation queries the response was YES. [2024-06-14 12:15:03,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11329 conditions, 2712 events. 1805/2712 cut-off events. For 15092/15094 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12906 event pairs, 568 based on Foata normal form. 12/2719 useless extension candidates. Maximal degree in co-relation 11298. Up to 2285 conditions per place. [2024-06-14 12:15:03,302 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 48 changer transitions 0/118 dead transitions. [2024-06-14 12:15:03,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 1005 flow [2024-06-14 12:15:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:15:03,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-14 12:15:03,304 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 581 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:15:03,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 1005 flow [2024-06-14 12:15:03,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 118 transitions, 977 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 12:15:03,319 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 734 flow [2024-06-14 12:15:03,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2024-06-14 12:15:03,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-14 12:15:03,320 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 734 flow [2024-06-14 12:15:03,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:03,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:03,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:03,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:15:03,321 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:03,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1719949398, now seen corresponding path program 3 times [2024-06-14 12:15:03,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:03,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547950726] [2024-06-14 12:15:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:03,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:04,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:04,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547950726] [2024-06-14 12:15:04,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547950726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:04,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:04,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:04,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642210934] [2024-06-14 12:15:04,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:04,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:04,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:04,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:04,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:04,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 734 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:04,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:04,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:04,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:04,653 INFO L124 PetriNetUnfolderBase]: 1841/2774 cut-off events. [2024-06-14 12:15:04,653 INFO L125 PetriNetUnfolderBase]: For 18384/18390 co-relation queries the response was YES. [2024-06-14 12:15:04,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12348 conditions, 2774 events. 1841/2774 cut-off events. For 18384/18390 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13330 event pairs, 569 based on Foata normal form. 7/2765 useless extension candidates. Maximal degree in co-relation 12315. Up to 2301 conditions per place. [2024-06-14 12:15:04,668 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 58 changer transitions 0/127 dead transitions. [2024-06-14 12:15:04,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 127 transitions, 1268 flow [2024-06-14 12:15:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:15:04,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:15:04,669 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 734 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:15:04,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 127 transitions, 1268 flow [2024-06-14 12:15:04,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 127 transitions, 1152 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:04,686 INFO L231 Difference]: Finished difference. Result has 77 places, 99 transitions, 878 flow [2024-06-14 12:15:04,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=878, PETRI_PLACES=77, PETRI_TRANSITIONS=99} [2024-06-14 12:15:04,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-14 12:15:04,687 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 99 transitions, 878 flow [2024-06-14 12:15:04,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:04,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:04,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:04,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:15:04,688 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:04,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash 582237618, now seen corresponding path program 4 times [2024-06-14 12:15:04,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:04,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301326252] [2024-06-14 12:15:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:04,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:05,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:05,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301326252] [2024-06-14 12:15:05,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301326252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:05,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:05,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:05,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106487535] [2024-06-14 12:15:05,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:05,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:05,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:05,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:05,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:05,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:05,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 878 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:05,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:05,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:05,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:05,983 INFO L124 PetriNetUnfolderBase]: 1825/2744 cut-off events. [2024-06-14 12:15:05,983 INFO L125 PetriNetUnfolderBase]: For 18407/18413 co-relation queries the response was YES. [2024-06-14 12:15:05,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12132 conditions, 2744 events. 1825/2744 cut-off events. For 18407/18413 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13149 event pairs, 560 based on Foata normal form. 7/2737 useless extension candidates. Maximal degree in co-relation 12098. Up to 2294 conditions per place. [2024-06-14 12:15:05,999 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 61 selfloop transitions, 60 changer transitions 0/125 dead transitions. [2024-06-14 12:15:05,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1242 flow [2024-06-14 12:15:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:15:06,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-14 12:15:06,001 INFO L175 Difference]: Start difference. First operand has 77 places, 99 transitions, 878 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:15:06,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1242 flow [2024-06-14 12:15:06,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 125 transitions, 1155 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 12:15:06,023 INFO L231 Difference]: Finished difference. Result has 82 places, 99 transitions, 921 flow [2024-06-14 12:15:06,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=921, PETRI_PLACES=82, PETRI_TRANSITIONS=99} [2024-06-14 12:15:06,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 12:15:06,024 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 99 transitions, 921 flow [2024-06-14 12:15:06,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:06,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:06,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:06,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:15:06,025 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:06,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:06,025 INFO L85 PathProgramCache]: Analyzing trace with hash 582477186, now seen corresponding path program 1 times [2024-06-14 12:15:06,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:06,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083280500] [2024-06-14 12:15:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:06,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:07,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:07,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083280500] [2024-06-14 12:15:07,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083280500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:07,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:07,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:07,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48884131] [2024-06-14 12:15:07,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:07,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:07,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:07,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:07,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:07,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:07,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 921 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:07,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:07,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:07,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:07,645 INFO L124 PetriNetUnfolderBase]: 1610/2521 cut-off events. [2024-06-14 12:15:07,645 INFO L125 PetriNetUnfolderBase]: For 17755/17757 co-relation queries the response was YES. [2024-06-14 12:15:07,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11271 conditions, 2521 events. 1610/2521 cut-off events. For 17755/17757 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12465 event pairs, 527 based on Foata normal form. 4/2507 useless extension candidates. Maximal degree in co-relation 11234. Up to 2349 conditions per place. [2024-06-14 12:15:07,660 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 104 selfloop transitions, 13 changer transitions 0/122 dead transitions. [2024-06-14 12:15:07,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 122 transitions, 1239 flow [2024-06-14 12:15:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:15:07,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-14 12:15:07,662 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 921 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:15:07,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 122 transitions, 1239 flow [2024-06-14 12:15:07,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 1087 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:07,678 INFO L231 Difference]: Finished difference. Result has 82 places, 101 transitions, 828 flow [2024-06-14 12:15:07,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=828, PETRI_PLACES=82, PETRI_TRANSITIONS=101} [2024-06-14 12:15:07,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 12:15:07,679 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 101 transitions, 828 flow [2024-06-14 12:15:07,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:07,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:07,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:07,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:15:07,679 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:07,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash 659927372, now seen corresponding path program 1 times [2024-06-14 12:15:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:07,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003070027] [2024-06-14 12:15:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:07,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:08,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:08,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003070027] [2024-06-14 12:15:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003070027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:08,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:08,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:15:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692908842] [2024-06-14 12:15:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:15:08,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:15:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:15:08,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:08,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 828 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:08,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:08,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:08,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:08,689 INFO L124 PetriNetUnfolderBase]: 1607/2508 cut-off events. [2024-06-14 12:15:08,689 INFO L125 PetriNetUnfolderBase]: For 18812/18814 co-relation queries the response was YES. [2024-06-14 12:15:08,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11102 conditions, 2508 events. 1607/2508 cut-off events. For 18812/18814 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12329 event pairs, 554 based on Foata normal form. 1/2507 useless extension candidates. Maximal degree in co-relation 11065. Up to 2387 conditions per place. [2024-06-14 12:15:08,705 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 99 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-14 12:15:08,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 1088 flow [2024-06-14 12:15:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:15:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:15:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-14 12:15:08,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-14 12:15:08,706 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 828 flow. Second operand 5 states and 87 transitions. [2024-06-14 12:15:08,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 1088 flow [2024-06-14 12:15:08,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 1047 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:08,725 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 837 flow [2024-06-14 12:15:08,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=837, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2024-06-14 12:15:08,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 12:15:08,726 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 837 flow [2024-06-14 12:15:08,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:08,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:08,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:08,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:15:08,727 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:08,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash 621032788, now seen corresponding path program 1 times [2024-06-14 12:15:08,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:08,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535282179] [2024-06-14 12:15:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:08,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:09,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:09,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535282179] [2024-06-14 12:15:09,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535282179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:09,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:09,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084894136] [2024-06-14 12:15:09,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:09,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:09,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:09,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:09,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:09,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:09,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 837 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:09,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:09,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:09,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:10,178 INFO L124 PetriNetUnfolderBase]: 1858/2821 cut-off events. [2024-06-14 12:15:10,178 INFO L125 PetriNetUnfolderBase]: For 25346/25352 co-relation queries the response was YES. [2024-06-14 12:15:10,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13011 conditions, 2821 events. 1858/2821 cut-off events. For 25346/25352 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13706 event pairs, 572 based on Foata normal form. 14/2830 useless extension candidates. Maximal degree in co-relation 12973. Up to 2316 conditions per place. [2024-06-14 12:15:10,197 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 63 changer transitions 0/142 dead transitions. [2024-06-14 12:15:10,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 142 transitions, 1339 flow [2024-06-14 12:15:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:15:10,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-14 12:15:10,199 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 837 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:15:10,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 142 transitions, 1339 flow [2024-06-14 12:15:10,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 142 transitions, 1311 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:10,224 INFO L231 Difference]: Finished difference. Result has 86 places, 110 transitions, 1022 flow [2024-06-14 12:15:10,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1022, PETRI_PLACES=86, PETRI_TRANSITIONS=110} [2024-06-14 12:15:10,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-14 12:15:10,225 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 110 transitions, 1022 flow [2024-06-14 12:15:10,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:10,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:10,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:10,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:15:10,226 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:10,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:10,226 INFO L85 PathProgramCache]: Analyzing trace with hash 675965348, now seen corresponding path program 2 times [2024-06-14 12:15:10,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:10,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558843850] [2024-06-14 12:15:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:10,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:10,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:10,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558843850] [2024-06-14 12:15:10,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558843850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:10,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:10,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:10,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82217016] [2024-06-14 12:15:10,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:10,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:10,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:10,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:10,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:11,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:11,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 110 transitions, 1022 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:11,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:11,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:11,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:11,641 INFO L124 PetriNetUnfolderBase]: 1890/2875 cut-off events. [2024-06-14 12:15:11,642 INFO L125 PetriNetUnfolderBase]: For 29604/29606 co-relation queries the response was YES. [2024-06-14 12:15:11,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13907 conditions, 2875 events. 1890/2875 cut-off events. For 29604/29606 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14046 event pairs, 558 based on Foata normal form. 8/2878 useless extension candidates. Maximal degree in co-relation 13868. Up to 2345 conditions per place. [2024-06-14 12:15:11,665 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 76 selfloop transitions, 65 changer transitions 0/145 dead transitions. [2024-06-14 12:15:11,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 145 transitions, 1534 flow [2024-06-14 12:15:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:11,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:15:11,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-14 12:15:11,667 INFO L175 Difference]: Start difference. First operand has 86 places, 110 transitions, 1022 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:15:11,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 145 transitions, 1534 flow [2024-06-14 12:15:11,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 1319 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:11,691 INFO L231 Difference]: Finished difference. Result has 87 places, 116 transitions, 1038 flow [2024-06-14 12:15:11,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1038, PETRI_PLACES=87, PETRI_TRANSITIONS=116} [2024-06-14 12:15:11,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-14 12:15:11,692 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 116 transitions, 1038 flow [2024-06-14 12:15:11,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:11,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:11,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:11,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:15:11,693 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:11,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:11,693 INFO L85 PathProgramCache]: Analyzing trace with hash 871890792, now seen corresponding path program 3 times [2024-06-14 12:15:11,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:11,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566046305] [2024-06-14 12:15:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:11,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:12,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:12,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566046305] [2024-06-14 12:15:12,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566046305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:12,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:12,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:12,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408210167] [2024-06-14 12:15:12,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:12,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:12,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:12,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:12,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:12,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 116 transitions, 1038 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:12,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:12,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:12,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:13,003 INFO L124 PetriNetUnfolderBase]: 1874/2853 cut-off events. [2024-06-14 12:15:13,004 INFO L125 PetriNetUnfolderBase]: For 30799/30808 co-relation queries the response was YES. [2024-06-14 12:15:13,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13810 conditions, 2853 events. 1874/2853 cut-off events. For 30799/30808 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13903 event pairs, 576 based on Foata normal form. 9/2850 useless extension candidates. Maximal degree in co-relation 13771. Up to 2332 conditions per place. [2024-06-14 12:15:13,019 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 62 changer transitions 0/139 dead transitions. [2024-06-14 12:15:13,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 139 transitions, 1382 flow [2024-06-14 12:15:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:15:13,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-14 12:15:13,025 INFO L175 Difference]: Start difference. First operand has 87 places, 116 transitions, 1038 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:15:13,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 139 transitions, 1382 flow [2024-06-14 12:15:13,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 1244 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:13,049 INFO L231 Difference]: Finished difference. Result has 90 places, 116 transitions, 1035 flow [2024-06-14 12:15:13,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1035, PETRI_PLACES=90, PETRI_TRANSITIONS=116} [2024-06-14 12:15:13,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-14 12:15:13,050 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 116 transitions, 1035 flow [2024-06-14 12:15:13,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:13,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:13,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:13,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:15:13,051 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:13,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1017086490, now seen corresponding path program 1 times [2024-06-14 12:15:13,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:13,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40810709] [2024-06-14 12:15:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:13,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:14,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:14,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40810709] [2024-06-14 12:15:14,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40810709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:14,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:14,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:14,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304273780] [2024-06-14 12:15:14,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:14,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:14,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:14,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:14,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 116 transitions, 1035 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:14,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:14,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:14,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:14,498 INFO L124 PetriNetUnfolderBase]: 1664/2626 cut-off events. [2024-06-14 12:15:14,498 INFO L125 PetriNetUnfolderBase]: For 28686/28688 co-relation queries the response was YES. [2024-06-14 12:15:14,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12622 conditions, 2626 events. 1664/2626 cut-off events. For 28686/28688 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13200 event pairs, 581 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 12582. Up to 2468 conditions per place. [2024-06-14 12:15:14,512 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 112 selfloop transitions, 11 changer transitions 0/128 dead transitions. [2024-06-14 12:15:14,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 128 transitions, 1333 flow [2024-06-14 12:15:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 12:15:14,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 12:15:14,516 INFO L175 Difference]: Start difference. First operand has 90 places, 116 transitions, 1035 flow. Second operand 6 states and 100 transitions. [2024-06-14 12:15:14,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 128 transitions, 1333 flow [2024-06-14 12:15:14,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 1150 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:14,545 INFO L231 Difference]: Finished difference. Result has 89 places, 119 transitions, 912 flow [2024-06-14 12:15:14,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=912, PETRI_PLACES=89, PETRI_TRANSITIONS=119} [2024-06-14 12:15:14,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-14 12:15:14,547 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 119 transitions, 912 flow [2024-06-14 12:15:14,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:14,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:14,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:14,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:15:14,547 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:14,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash -638235399, now seen corresponding path program 1 times [2024-06-14 12:15:14,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:14,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817361870] [2024-06-14 12:15:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:14,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:15,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:15,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817361870] [2024-06-14 12:15:15,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817361870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:15,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:15,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:15,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725402414] [2024-06-14 12:15:15,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:15,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:15,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:15,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:15,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:15,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 119 transitions, 912 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:15,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:15,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:15,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:15,806 INFO L124 PetriNetUnfolderBase]: 1885/2867 cut-off events. [2024-06-14 12:15:15,806 INFO L125 PetriNetUnfolderBase]: For 35410/35415 co-relation queries the response was YES. [2024-06-14 12:15:15,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14013 conditions, 2867 events. 1885/2867 cut-off events. For 35410/35415 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13957 event pairs, 445 based on Foata normal form. 6/2870 useless extension candidates. Maximal degree in co-relation 13972. Up to 2545 conditions per place. [2024-06-14 12:15:15,820 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 113 selfloop transitions, 32 changer transitions 0/149 dead transitions. [2024-06-14 12:15:15,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 149 transitions, 1388 flow [2024-06-14 12:15:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:15:15,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:15:15,822 INFO L175 Difference]: Start difference. First operand has 89 places, 119 transitions, 912 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:15:15,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 149 transitions, 1388 flow [2024-06-14 12:15:15,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 149 transitions, 1350 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:15,846 INFO L231 Difference]: Finished difference. Result has 92 places, 123 transitions, 993 flow [2024-06-14 12:15:15,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=993, PETRI_PLACES=92, PETRI_TRANSITIONS=123} [2024-06-14 12:15:15,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-14 12:15:15,847 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 123 transitions, 993 flow [2024-06-14 12:15:15,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:15,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:15,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:15,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:15:15,848 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:15,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1956852477, now seen corresponding path program 2 times [2024-06-14 12:15:15,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:15,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874648234] [2024-06-14 12:15:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:15,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:16,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874648234] [2024-06-14 12:15:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874648234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:16,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:16,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:16,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505046971] [2024-06-14 12:15:16,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:16,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:16,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:16,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:16,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:16,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 123 transitions, 993 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:16,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:16,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:16,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:17,302 INFO L124 PetriNetUnfolderBase]: 1877/2854 cut-off events. [2024-06-14 12:15:17,303 INFO L125 PetriNetUnfolderBase]: For 38962/38967 co-relation queries the response was YES. [2024-06-14 12:15:17,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14362 conditions, 2854 events. 1877/2854 cut-off events. For 38962/38967 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13907 event pairs, 583 based on Foata normal form. 6/2857 useless extension candidates. Maximal degree in co-relation 14320. Up to 2621 conditions per place. [2024-06-14 12:15:17,320 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 33 changer transitions 0/147 dead transitions. [2024-06-14 12:15:17,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1357 flow [2024-06-14 12:15:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:15:17,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-14 12:15:17,324 INFO L175 Difference]: Start difference. First operand has 92 places, 123 transitions, 993 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:15:17,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1357 flow [2024-06-14 12:15:17,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 147 transitions, 1297 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:17,366 INFO L231 Difference]: Finished difference. Result has 96 places, 123 transitions, 1008 flow [2024-06-14 12:15:17,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1008, PETRI_PLACES=96, PETRI_TRANSITIONS=123} [2024-06-14 12:15:17,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-14 12:15:17,367 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 123 transitions, 1008 flow [2024-06-14 12:15:17,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:17,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:17,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:17,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:15:17,367 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:17,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash -519902571, now seen corresponding path program 1 times [2024-06-14 12:15:17,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:17,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156352436] [2024-06-14 12:15:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:17,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:18,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:18,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156352436] [2024-06-14 12:15:18,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156352436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:18,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:18,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340129891] [2024-06-14 12:15:18,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:18,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:18,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:18,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:18,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:18,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 123 transitions, 1008 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:18,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:18,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:18,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:18,933 INFO L124 PetriNetUnfolderBase]: 1969/3003 cut-off events. [2024-06-14 12:15:18,933 INFO L125 PetriNetUnfolderBase]: For 47006/47008 co-relation queries the response was YES. [2024-06-14 12:15:18,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15261 conditions, 3003 events. 1969/3003 cut-off events. For 47006/47008 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14850 event pairs, 521 based on Foata normal form. 24/3022 useless extension candidates. Maximal degree in co-relation 15217. Up to 2321 conditions per place. [2024-06-14 12:15:18,951 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 86 selfloop transitions, 70 changer transitions 0/160 dead transitions. [2024-06-14 12:15:18,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 160 transitions, 1458 flow [2024-06-14 12:15:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:15:18,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-14 12:15:18,953 INFO L175 Difference]: Start difference. First operand has 96 places, 123 transitions, 1008 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:15:18,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 160 transitions, 1458 flow [2024-06-14 12:15:18,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 160 transitions, 1383 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:18,988 INFO L231 Difference]: Finished difference. Result has 98 places, 125 transitions, 1115 flow [2024-06-14 12:15:18,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1115, PETRI_PLACES=98, PETRI_TRANSITIONS=125} [2024-06-14 12:15:18,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-14 12:15:18,989 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 125 transitions, 1115 flow [2024-06-14 12:15:18,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:18,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:18,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:18,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:15:18,990 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)] === [2024-06-14 12:15:18,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1465308467, now seen corresponding path program 1 times [2024-06-14 12:15:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:18,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691925668] [2024-06-14 12:15:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:19,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691925668] [2024-06-14 12:15:19,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691925668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:19,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179274634] [2024-06-14 12:15:19,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:19,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:19,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:19,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:19,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 125 transitions, 1115 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:19,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:19,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:19,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:20,214 INFO L124 PetriNetUnfolderBase]: 1974/3022 cut-off events. [2024-06-14 12:15:20,214 INFO L125 PetriNetUnfolderBase]: For 48228/48234 co-relation queries the response was YES. [2024-06-14 12:15:20,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15923 conditions, 3022 events. 1974/3022 cut-off events. For 48228/48234 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14990 event pairs, 612 based on Foata normal form. 7/3027 useless extension candidates. Maximal degree in co-relation 15878. Up to 2916 conditions per place. [2024-06-14 12:15:20,231 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 127 selfloop transitions, 13 changer transitions 0/144 dead transitions. [2024-06-14 12:15:20,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 144 transitions, 1477 flow [2024-06-14 12:15:20,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:15:20,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-14 12:15:20,233 INFO L175 Difference]: Start difference. First operand has 98 places, 125 transitions, 1115 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:15:20,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 144 transitions, 1477 flow [2024-06-14 12:15:20,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1329 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:20,270 INFO L231 Difference]: Finished difference. Result has 98 places, 128 transitions, 1034 flow [2024-06-14 12:15:20,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1034, PETRI_PLACES=98, PETRI_TRANSITIONS=128} [2024-06-14 12:15:20,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-14 12:15:20,271 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 128 transitions, 1034 flow [2024-06-14 12:15:20,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:20,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:20,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:20,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:15:20,272 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:20,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:20,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1867302541, now seen corresponding path program 2 times [2024-06-14 12:15:20,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:20,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361495837] [2024-06-14 12:15:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:20,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:21,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:21,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361495837] [2024-06-14 12:15:21,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361495837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:21,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:21,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:21,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321935585] [2024-06-14 12:15:21,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:21,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:21,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:21,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:21,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:21,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 128 transitions, 1034 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:21,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:21,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:21,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:21,809 INFO L124 PetriNetUnfolderBase]: 1991/3021 cut-off events. [2024-06-14 12:15:21,810 INFO L125 PetriNetUnfolderBase]: For 51897/51903 co-relation queries the response was YES. [2024-06-14 12:15:21,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16042 conditions, 3021 events. 1991/3021 cut-off events. For 51897/51903 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14817 event pairs, 536 based on Foata normal form. 5/3004 useless extension candidates. Maximal degree in co-relation 15996. Up to 2504 conditions per place. [2024-06-14 12:15:21,826 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 74 changer transitions 0/159 dead transitions. [2024-06-14 12:15:21,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1468 flow [2024-06-14 12:15:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:15:21,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:15:21,827 INFO L175 Difference]: Start difference. First operand has 98 places, 128 transitions, 1034 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:15:21,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1468 flow [2024-06-14 12:15:21,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1425 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:21,873 INFO L231 Difference]: Finished difference. Result has 102 places, 130 transitions, 1183 flow [2024-06-14 12:15:21,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1183, PETRI_PLACES=102, PETRI_TRANSITIONS=130} [2024-06-14 12:15:21,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-14 12:15:21,873 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 130 transitions, 1183 flow [2024-06-14 12:15:21,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:21,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:21,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:21,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:15:21,874 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:21,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1858731661, now seen corresponding path program 3 times [2024-06-14 12:15:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:21,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719965046] [2024-06-14 12:15:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:21,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:22,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:22,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719965046] [2024-06-14 12:15:22,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719965046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:22,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:22,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878613026] [2024-06-14 12:15:22,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:22,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:22,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:22,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:22,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:22,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 130 transitions, 1183 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:22,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:22,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:22,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:23,472 INFO L124 PetriNetUnfolderBase]: 2008/3048 cut-off events. [2024-06-14 12:15:23,472 INFO L125 PetriNetUnfolderBase]: For 58214/58220 co-relation queries the response was YES. [2024-06-14 12:15:23,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16970 conditions, 3048 events. 2008/3048 cut-off events. For 58214/58220 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15015 event pairs, 485 based on Foata normal form. 5/3031 useless extension candidates. Maximal degree in co-relation 16923. Up to 2293 conditions per place. [2024-06-14 12:15:23,488 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 84 selfloop transitions, 81 changer transitions 0/169 dead transitions. [2024-06-14 12:15:23,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 169 transitions, 1777 flow [2024-06-14 12:15:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:15:23,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-14 12:15:23,490 INFO L175 Difference]: Start difference. First operand has 102 places, 130 transitions, 1183 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:15:23,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 169 transitions, 1777 flow [2024-06-14 12:15:23,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 169 transitions, 1605 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:23,538 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 1256 flow [2024-06-14 12:15:23,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1256, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2024-06-14 12:15:23,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-14 12:15:23,539 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 1256 flow [2024-06-14 12:15:23,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:23,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:23,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:23,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:15:23,539 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:23,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2095203691, now seen corresponding path program 4 times [2024-06-14 12:15:23,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:23,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552632438] [2024-06-14 12:15:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:23,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:24,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:24,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552632438] [2024-06-14 12:15:24,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552632438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:24,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:24,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:24,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391076895] [2024-06-14 12:15:24,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:24,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:24,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:24,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:24,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:24,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:24,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 1256 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:24,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:24,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:24,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:25,139 INFO L124 PetriNetUnfolderBase]: 2000/3040 cut-off events. [2024-06-14 12:15:25,140 INFO L125 PetriNetUnfolderBase]: For 62491/62497 co-relation queries the response was YES. [2024-06-14 12:15:25,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17162 conditions, 3040 events. 2000/3040 cut-off events. For 62491/62497 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14933 event pairs, 546 based on Foata normal form. 5/3023 useless extension candidates. Maximal degree in co-relation 17114. Up to 2519 conditions per place. [2024-06-14 12:15:25,158 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 87 selfloop transitions, 72 changer transitions 0/163 dead transitions. [2024-06-14 12:15:25,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 163 transitions, 1664 flow [2024-06-14 12:15:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:15:25,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:15:25,160 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 1256 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:15:25,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 163 transitions, 1664 flow [2024-06-14 12:15:25,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 163 transitions, 1472 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:25,228 INFO L231 Difference]: Finished difference. Result has 107 places, 134 transitions, 1216 flow [2024-06-14 12:15:25,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1216, PETRI_PLACES=107, PETRI_TRANSITIONS=134} [2024-06-14 12:15:25,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-14 12:15:25,228 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 134 transitions, 1216 flow [2024-06-14 12:15:25,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:25,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:25,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:25,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:15:25,229 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:25,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1464922517, now seen corresponding path program 2 times [2024-06-14 12:15:25,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:25,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127143502] [2024-06-14 12:15:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:25,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:25,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:25,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127143502] [2024-06-14 12:15:25,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127143502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:25,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:25,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:25,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154498266] [2024-06-14 12:15:25,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:25,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:25,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:25,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:25,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:25,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 134 transitions, 1216 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:25,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:25,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:25,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:26,367 INFO L124 PetriNetUnfolderBase]: 1997/3065 cut-off events. [2024-06-14 12:15:26,368 INFO L125 PetriNetUnfolderBase]: For 64906/64920 co-relation queries the response was YES. [2024-06-14 12:15:26,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17090 conditions, 3065 events. 1997/3065 cut-off events. For 64906/64920 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15278 event pairs, 610 based on Foata normal form. 13/3074 useless extension candidates. Maximal degree in co-relation 17041. Up to 2948 conditions per place. [2024-06-14 12:15:26,390 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 126 selfloop transitions, 18 changer transitions 0/148 dead transitions. [2024-06-14 12:15:26,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 148 transitions, 1578 flow [2024-06-14 12:15:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 12:15:26,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-14 12:15:26,392 INFO L175 Difference]: Start difference. First operand has 107 places, 134 transitions, 1216 flow. Second operand 6 states and 97 transitions. [2024-06-14 12:15:26,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 148 transitions, 1578 flow [2024-06-14 12:15:26,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 1403 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:26,442 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1125 flow [2024-06-14 12:15:26,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1125, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-06-14 12:15:26,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-14 12:15:26,443 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1125 flow [2024-06-14 12:15:26,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:26,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:26,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:26,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:15:26,444 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)] === [2024-06-14 12:15:26,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1470630485, now seen corresponding path program 1 times [2024-06-14 12:15:26,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:26,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968102024] [2024-06-14 12:15:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:26,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:27,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:27,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968102024] [2024-06-14 12:15:27,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968102024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:27,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:27,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:27,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297115395] [2024-06-14 12:15:27,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:27,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:27,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:27,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:27,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:27,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:27,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:27,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:27,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:27,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:27,586 INFO L124 PetriNetUnfolderBase]: 1798/2839 cut-off events. [2024-06-14 12:15:27,586 INFO L125 PetriNetUnfolderBase]: For 58051/58053 co-relation queries the response was YES. [2024-06-14 12:15:27,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15419 conditions, 2839 events. 1798/2839 cut-off events. For 58051/58053 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14577 event pairs, 560 based on Foata normal form. 1/2838 useless extension candidates. Maximal degree in co-relation 15369. Up to 2681 conditions per place. [2024-06-14 12:15:27,601 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 136 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2024-06-14 12:15:27,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 152 transitions, 1485 flow [2024-06-14 12:15:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 12:15:27,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-14 12:15:27,602 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1125 flow. Second operand 6 states and 103 transitions. [2024-06-14 12:15:27,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 152 transitions, 1485 flow [2024-06-14 12:15:27,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 152 transitions, 1423 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:27,649 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1127 flow [2024-06-14 12:15:27,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1127, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2024-06-14 12:15:27,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-14 12:15:27,650 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1127 flow [2024-06-14 12:15:27,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:27,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:27,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:27,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:15:27,652 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:27,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1464916565, now seen corresponding path program 2 times [2024-06-14 12:15:27,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:27,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792665898] [2024-06-14 12:15:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:27,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:28,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:28,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792665898] [2024-06-14 12:15:28,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792665898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:28,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:28,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:28,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905832672] [2024-06-14 12:15:28,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:28,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:28,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:28,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:28,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:28,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:28,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1127 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:28,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:28,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:28,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:28,738 INFO L124 PetriNetUnfolderBase]: 1795/2836 cut-off events. [2024-06-14 12:15:28,738 INFO L125 PetriNetUnfolderBase]: For 60959/60964 co-relation queries the response was YES. [2024-06-14 12:15:28,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15730 conditions, 2836 events. 1795/2836 cut-off events. For 60959/60964 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14588 event pairs, 564 based on Foata normal form. 3/2836 useless extension candidates. Maximal degree in co-relation 15679. Up to 2671 conditions per place. [2024-06-14 12:15:28,756 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 131 selfloop transitions, 16 changer transitions 0/152 dead transitions. [2024-06-14 12:15:28,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 152 transitions, 1483 flow [2024-06-14 12:15:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:15:28,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:15:28,757 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1127 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:15:28,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 152 transitions, 1483 flow [2024-06-14 12:15:28,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 152 transitions, 1441 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:28,823 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 1165 flow [2024-06-14 12:15:28,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1165, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2024-06-14 12:15:28,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-14 12:15:28,828 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 1165 flow [2024-06-14 12:15:28,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:28,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:28,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:28,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:15:28,828 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:28,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:28,831 INFO L85 PathProgramCache]: Analyzing trace with hash 444320215, now seen corresponding path program 1 times [2024-06-14 12:15:28,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:28,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355080997] [2024-06-14 12:15:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:28,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:29,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:29,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355080997] [2024-06-14 12:15:29,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355080997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:29,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:29,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:29,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68690408] [2024-06-14 12:15:29,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:29,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:29,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:29,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:29,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:29,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 1165 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:29,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:29,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:29,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:30,205 INFO L124 PetriNetUnfolderBase]: 2118/3271 cut-off events. [2024-06-14 12:15:30,205 INFO L125 PetriNetUnfolderBase]: For 88530/88532 co-relation queries the response was YES. [2024-06-14 12:15:30,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19063 conditions, 3271 events. 2118/3271 cut-off events. For 88530/88532 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16692 event pairs, 403 based on Foata normal form. 16/3282 useless extension candidates. Maximal degree in co-relation 19011. Up to 2043 conditions per place. [2024-06-14 12:15:30,226 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 112 selfloop transitions, 68 changer transitions 0/184 dead transitions. [2024-06-14 12:15:30,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 184 transitions, 1785 flow [2024-06-14 12:15:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:15:30,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:15:30,228 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 1165 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:15:30,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 184 transitions, 1785 flow [2024-06-14 12:15:30,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 184 transitions, 1727 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:30,304 INFO L231 Difference]: Finished difference. Result has 114 places, 145 transitions, 1299 flow [2024-06-14 12:15:30,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=114, PETRI_TRANSITIONS=145} [2024-06-14 12:15:30,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-14 12:15:30,306 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 145 transitions, 1299 flow [2024-06-14 12:15:30,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:30,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:30,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:30,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:15:30,306 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:30,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:30,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1778106203, now seen corresponding path program 2 times [2024-06-14 12:15:30,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:30,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593858615] [2024-06-14 12:15:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:30,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:31,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:31,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593858615] [2024-06-14 12:15:31,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593858615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:31,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:31,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:31,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885675834] [2024-06-14 12:15:31,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:31,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:31,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:31,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:31,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:31,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 145 transitions, 1299 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:31,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:31,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:31,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:31,729 INFO L124 PetriNetUnfolderBase]: 2176/3364 cut-off events. [2024-06-14 12:15:31,729 INFO L125 PetriNetUnfolderBase]: For 96100/96102 co-relation queries the response was YES. [2024-06-14 12:15:31,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20095 conditions, 3364 events. 2176/3364 cut-off events. For 96100/96102 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17303 event pairs, 575 based on Foata normal form. 16/3375 useless extension candidates. Maximal degree in co-relation 20042. Up to 2550 conditions per place. [2024-06-14 12:15:31,755 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 71 changer transitions 0/184 dead transitions. [2024-06-14 12:15:31,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 184 transitions, 1803 flow [2024-06-14 12:15:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:31,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:15:31,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:15:31,758 INFO L175 Difference]: Start difference. First operand has 114 places, 145 transitions, 1299 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:15:31,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 184 transitions, 1803 flow [2024-06-14 12:15:31,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 184 transitions, 1720 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:31,830 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 1392 flow [2024-06-14 12:15:31,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2024-06-14 12:15:31,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-14 12:15:31,831 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 1392 flow [2024-06-14 12:15:31,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:31,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:31,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:31,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:15:31,831 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)] === [2024-06-14 12:15:31,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1242198603, now seen corresponding path program 1 times [2024-06-14 12:15:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:31,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276806502] [2024-06-14 12:15:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:32,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:32,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276806502] [2024-06-14 12:15:32,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276806502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:32,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:32,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:32,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692001267] [2024-06-14 12:15:32,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:32,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:32,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:32,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:32,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:32,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:32,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 1392 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:32,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:32,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:32,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:33,210 INFO L124 PetriNetUnfolderBase]: 2186/3386 cut-off events. [2024-06-14 12:15:33,210 INFO L125 PetriNetUnfolderBase]: For 98279/98288 co-relation queries the response was YES. [2024-06-14 12:15:33,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20703 conditions, 3386 events. 2186/3386 cut-off events. For 98279/98288 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17517 event pairs, 651 based on Foata normal form. 10/3393 useless extension candidates. Maximal degree in co-relation 20648. Up to 3150 conditions per place. [2024-06-14 12:15:33,236 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 134 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-14 12:15:33,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 1856 flow [2024-06-14 12:15:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:15:33,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-14 12:15:33,237 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 1392 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:15:33,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 1856 flow [2024-06-14 12:15:33,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 173 transitions, 1698 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:33,306 INFO L231 Difference]: Finished difference. Result has 119 places, 150 transitions, 1368 flow [2024-06-14 12:15:33,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1368, PETRI_PLACES=119, PETRI_TRANSITIONS=150} [2024-06-14 12:15:33,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-14 12:15:33,307 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 150 transitions, 1368 flow [2024-06-14 12:15:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:33,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:33,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:33,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:15:33,308 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:33,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash -188055051, now seen corresponding path program 3 times [2024-06-14 12:15:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:33,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240271982] [2024-06-14 12:15:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:33,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:34,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:34,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240271982] [2024-06-14 12:15:34,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240271982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:34,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:34,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:34,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846490826] [2024-06-14 12:15:34,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:34,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:34,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:34,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:34,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:34,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:34,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 150 transitions, 1368 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:34,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:34,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:34,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:34,794 INFO L124 PetriNetUnfolderBase]: 2305/3604 cut-off events. [2024-06-14 12:15:34,795 INFO L125 PetriNetUnfolderBase]: For 114247/114253 co-relation queries the response was YES. [2024-06-14 12:15:34,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22196 conditions, 3604 events. 2305/3604 cut-off events. For 114247/114253 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19103 event pairs, 475 based on Foata normal form. 22/3621 useless extension candidates. Maximal degree in co-relation 22140. Up to 2667 conditions per place. [2024-06-14 12:15:34,823 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 73 changer transitions 0/195 dead transitions. [2024-06-14 12:15:34,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 195 transitions, 2048 flow [2024-06-14 12:15:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:15:34,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-14 12:15:34,825 INFO L175 Difference]: Start difference. First operand has 119 places, 150 transitions, 1368 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:15:34,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 195 transitions, 2048 flow [2024-06-14 12:15:34,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 195 transitions, 1944 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:34,914 INFO L231 Difference]: Finished difference. Result has 122 places, 152 transitions, 1474 flow [2024-06-14 12:15:34,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1474, PETRI_PLACES=122, PETRI_TRANSITIONS=152} [2024-06-14 12:15:34,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-14 12:15:34,916 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 152 transitions, 1474 flow [2024-06-14 12:15:34,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:34,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:34,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:34,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:15:34,917 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:34,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:34,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1057313047, now seen corresponding path program 4 times [2024-06-14 12:15:34,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:34,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055722969] [2024-06-14 12:15:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:34,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:35,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:35,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055722969] [2024-06-14 12:15:35,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055722969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:35,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:35,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683474528] [2024-06-14 12:15:35,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:35,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:35,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:35,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:35,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:35,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 152 transitions, 1474 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:35,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:35,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:35,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:36,417 INFO L124 PetriNetUnfolderBase]: 2380/3729 cut-off events. [2024-06-14 12:15:36,418 INFO L125 PetriNetUnfolderBase]: For 125720/125726 co-relation queries the response was YES. [2024-06-14 12:15:36,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23320 conditions, 3729 events. 2380/3729 cut-off events. For 125720/125726 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20064 event pairs, 638 based on Foata normal form. 26/3750 useless extension candidates. Maximal degree in co-relation 23263. Up to 3043 conditions per place. [2024-06-14 12:15:36,448 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 70 changer transitions 0/192 dead transitions. [2024-06-14 12:15:36,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 192 transitions, 2008 flow [2024-06-14 12:15:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:15:36,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:15:36,449 INFO L175 Difference]: Start difference. First operand has 122 places, 152 transitions, 1474 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:15:36,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 192 transitions, 2008 flow [2024-06-14 12:15:36,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 192 transitions, 1902 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:36,588 INFO L231 Difference]: Finished difference. Result has 126 places, 153 transitions, 1549 flow [2024-06-14 12:15:36,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1549, PETRI_PLACES=126, PETRI_TRANSITIONS=153} [2024-06-14 12:15:36,589 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-14 12:15:36,589 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 153 transitions, 1549 flow [2024-06-14 12:15:36,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:36,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:36,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:36,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:15:36,590 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:36,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1062675427, now seen corresponding path program 5 times [2024-06-14 12:15:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:36,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420162795] [2024-06-14 12:15:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:36,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:37,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:37,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420162795] [2024-06-14 12:15:37,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420162795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:37,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:37,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:37,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203463516] [2024-06-14 12:15:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:37,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:37,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:37,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:37,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:37,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 153 transitions, 1549 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:37,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:37,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:37,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:38,146 INFO L124 PetriNetUnfolderBase]: 2455/3846 cut-off events. [2024-06-14 12:15:38,146 INFO L125 PetriNetUnfolderBase]: For 133423/133425 co-relation queries the response was YES. [2024-06-14 12:15:38,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24307 conditions, 3846 events. 2455/3846 cut-off events. For 133423/133425 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20942 event pairs, 634 based on Foata normal form. 20/3861 useless extension candidates. Maximal degree in co-relation 24248. Up to 3168 conditions per place. [2024-06-14 12:15:38,173 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 66 changer transitions 0/190 dead transitions. [2024-06-14 12:15:38,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 190 transitions, 2067 flow [2024-06-14 12:15:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:15:38,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:15:38,175 INFO L175 Difference]: Start difference. First operand has 126 places, 153 transitions, 1549 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:15:38,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 190 transitions, 2067 flow [2024-06-14 12:15:38,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 190 transitions, 1916 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:38,294 INFO L231 Difference]: Finished difference. Result has 128 places, 154 transitions, 1571 flow [2024-06-14 12:15:38,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1571, PETRI_PLACES=128, PETRI_TRANSITIONS=154} [2024-06-14 12:15:38,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-14 12:15:38,295 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 154 transitions, 1571 flow [2024-06-14 12:15:38,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:38,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:38,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:38,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:15:38,295 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:38,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:38,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1062890629, now seen corresponding path program 1 times [2024-06-14 12:15:38,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:38,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891857588] [2024-06-14 12:15:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:38,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:39,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:39,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891857588] [2024-06-14 12:15:39,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891857588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:39,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:39,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:39,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758396195] [2024-06-14 12:15:39,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:39,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:39,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:39,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:39,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:39,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 154 transitions, 1571 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:39,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:39,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:39,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:39,970 INFO L124 PetriNetUnfolderBase]: 2496/3919 cut-off events. [2024-06-14 12:15:39,970 INFO L125 PetriNetUnfolderBase]: For 137725/137727 co-relation queries the response was YES. [2024-06-14 12:15:39,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24780 conditions, 3919 events. 2496/3919 cut-off events. For 137725/137727 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21475 event pairs, 640 based on Foata normal form. 12/3926 useless extension candidates. Maximal degree in co-relation 24720. Up to 2834 conditions per place. [2024-06-14 12:15:39,997 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 119 selfloop transitions, 69 changer transitions 0/192 dead transitions. [2024-06-14 12:15:39,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 192 transitions, 2097 flow [2024-06-14 12:15:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:15:39,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-14 12:15:39,998 INFO L175 Difference]: Start difference. First operand has 128 places, 154 transitions, 1571 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:15:39,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 192 transitions, 2097 flow [2024-06-14 12:15:40,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 192 transitions, 1952 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:40,136 INFO L231 Difference]: Finished difference. Result has 130 places, 155 transitions, 1603 flow [2024-06-14 12:15:40,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1603, PETRI_PLACES=130, PETRI_TRANSITIONS=155} [2024-06-14 12:15:40,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-14 12:15:40,137 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 155 transitions, 1603 flow [2024-06-14 12:15:40,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:40,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:40,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:40,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:15:40,137 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:40,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1477780275, now seen corresponding path program 2 times [2024-06-14 12:15:40,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:40,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596865208] [2024-06-14 12:15:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:40,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:40,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:40,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596865208] [2024-06-14 12:15:40,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596865208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:40,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:40,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:40,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376624871] [2024-06-14 12:15:40,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:40,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:40,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:40,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:40,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:40,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:40,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 155 transitions, 1603 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:40,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:40,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:40,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:41,506 INFO L124 PetriNetUnfolderBase]: 2524/3968 cut-off events. [2024-06-14 12:15:41,506 INFO L125 PetriNetUnfolderBase]: For 140467/140472 co-relation queries the response was YES. [2024-06-14 12:15:41,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25257 conditions, 3968 events. 2524/3968 cut-off events. For 140467/140472 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21926 event pairs, 764 based on Foata normal form. 4/3969 useless extension candidates. Maximal degree in co-relation 25196. Up to 3673 conditions per place. [2024-06-14 12:15:41,534 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 38 changer transitions 0/180 dead transitions. [2024-06-14 12:15:41,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 180 transitions, 2183 flow [2024-06-14 12:15:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:15:41,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 12:15:41,536 INFO L175 Difference]: Start difference. First operand has 130 places, 155 transitions, 1603 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:15:41,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 180 transitions, 2183 flow [2024-06-14 12:15:41,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 180 transitions, 2026 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:41,653 INFO L231 Difference]: Finished difference. Result has 132 places, 163 transitions, 1667 flow [2024-06-14 12:15:41,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1667, PETRI_PLACES=132, PETRI_TRANSITIONS=163} [2024-06-14 12:15:41,653 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-14 12:15:41,653 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 163 transitions, 1667 flow [2024-06-14 12:15:41,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:41,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:41,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:41,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:15:41,654 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)] === [2024-06-14 12:15:41,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1477780647, now seen corresponding path program 1 times [2024-06-14 12:15:41,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:41,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326625325] [2024-06-14 12:15:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:41,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:42,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:42,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326625325] [2024-06-14 12:15:42,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326625325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:42,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:42,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:42,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056367614] [2024-06-14 12:15:42,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:42,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:42,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:42,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:42,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:42,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:42,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 163 transitions, 1667 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:42,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:42,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:42,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:43,327 INFO L124 PetriNetUnfolderBase]: 2529/3983 cut-off events. [2024-06-14 12:15:43,327 INFO L125 PetriNetUnfolderBase]: For 146497/146503 co-relation queries the response was YES. [2024-06-14 12:15:43,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25709 conditions, 3983 events. 2529/3983 cut-off events. For 146497/146503 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21982 event pairs, 778 based on Foata normal form. 7/3988 useless extension candidates. Maximal degree in co-relation 25646. Up to 3835 conditions per place. [2024-06-14 12:15:43,363 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 163 selfloop transitions, 16 changer transitions 0/183 dead transitions. [2024-06-14 12:15:43,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 2123 flow [2024-06-14 12:15:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:15:43,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-14 12:15:43,364 INFO L175 Difference]: Start difference. First operand has 132 places, 163 transitions, 1667 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:15:43,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 2123 flow [2024-06-14 12:15:43,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 183 transitions, 2037 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:43,541 INFO L231 Difference]: Finished difference. Result has 136 places, 166 transitions, 1667 flow [2024-06-14 12:15:43,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1667, PETRI_PLACES=136, PETRI_TRANSITIONS=166} [2024-06-14 12:15:43,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-14 12:15:43,542 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 166 transitions, 1667 flow [2024-06-14 12:15:43,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:43,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:43,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:43,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:15:43,543 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:43,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash -170133183, now seen corresponding path program 6 times [2024-06-14 12:15:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:43,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777992246] [2024-06-14 12:15:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:44,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:44,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777992246] [2024-06-14 12:15:44,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777992246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:44,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:44,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:44,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459118692] [2024-06-14 12:15:44,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:44,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:44,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:44,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:44,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:44,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:44,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 166 transitions, 1667 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:44,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:44,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:44,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:45,197 INFO L124 PetriNetUnfolderBase]: 2493/3924 cut-off events. [2024-06-14 12:15:45,197 INFO L125 PetriNetUnfolderBase]: For 152209/152218 co-relation queries the response was YES. [2024-06-14 12:15:45,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25209 conditions, 3924 events. 2493/3924 cut-off events. For 152209/152218 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21537 event pairs, 649 based on Foata normal form. 23/3935 useless extension candidates. Maximal degree in co-relation 25144. Up to 3235 conditions per place. [2024-06-14 12:15:45,227 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 63 changer transitions 0/198 dead transitions. [2024-06-14 12:15:45,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 2163 flow [2024-06-14 12:15:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:15:45,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:15:45,229 INFO L175 Difference]: Start difference. First operand has 136 places, 166 transitions, 1667 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:15:45,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 2163 flow [2024-06-14 12:15:45,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 198 transitions, 2087 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:45,439 INFO L231 Difference]: Finished difference. Result has 139 places, 166 transitions, 1726 flow [2024-06-14 12:15:45,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1726, PETRI_PLACES=139, PETRI_TRANSITIONS=166} [2024-06-14 12:15:45,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-14 12:15:45,439 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 166 transitions, 1726 flow [2024-06-14 12:15:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:45,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:45,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:45,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:15:45,440 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:45,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:45,441 INFO L85 PathProgramCache]: Analyzing trace with hash -310240349, now seen corresponding path program 2 times [2024-06-14 12:15:45,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:45,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865249662] [2024-06-14 12:15:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:45,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:46,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:46,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865249662] [2024-06-14 12:15:46,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865249662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:46,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:46,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:46,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120826476] [2024-06-14 12:15:46,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:46,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:46,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:46,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:46,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 166 transitions, 1726 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:46,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:46,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:46,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:47,335 INFO L124 PetriNetUnfolderBase]: 2473/3889 cut-off events. [2024-06-14 12:15:47,335 INFO L125 PetriNetUnfolderBase]: For 148487/148492 co-relation queries the response was YES. [2024-06-14 12:15:47,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25048 conditions, 3889 events. 2473/3889 cut-off events. For 148487/148492 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21173 event pairs, 587 based on Foata normal form. 16/3893 useless extension candidates. Maximal degree in co-relation 24982. Up to 3113 conditions per place. [2024-06-14 12:15:47,366 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 131 selfloop transitions, 68 changer transitions 0/203 dead transitions. [2024-06-14 12:15:47,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 203 transitions, 2273 flow [2024-06-14 12:15:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:47,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:15:47,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 12:15:47,368 INFO L175 Difference]: Start difference. First operand has 139 places, 166 transitions, 1726 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:15:47,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 203 transitions, 2273 flow [2024-06-14 12:15:47,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 203 transitions, 2115 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:47,538 INFO L231 Difference]: Finished difference. Result has 142 places, 168 transitions, 1736 flow [2024-06-14 12:15:47,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1736, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2024-06-14 12:15:47,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-14 12:15:47,540 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1736 flow [2024-06-14 12:15:47,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:47,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:47,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:47,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:15:47,541 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:47,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash 634378569, now seen corresponding path program 3 times [2024-06-14 12:15:47,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706994354] [2024-06-14 12:15:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:48,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:48,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706994354] [2024-06-14 12:15:48,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706994354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:48,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:48,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:48,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094541640] [2024-06-14 12:15:48,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:48,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:48,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:48,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:48,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1736 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:48,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:48,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:48,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:49,075 INFO L124 PetriNetUnfolderBase]: 2453/3856 cut-off events. [2024-06-14 12:15:49,075 INFO L125 PetriNetUnfolderBase]: For 148126/148137 co-relation queries the response was YES. [2024-06-14 12:15:49,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24516 conditions, 3856 events. 2453/3856 cut-off events. For 148126/148137 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20963 event pairs, 453 based on Foata normal form. 16/3860 useless extension candidates. Maximal degree in co-relation 24448. Up to 2431 conditions per place. [2024-06-14 12:15:49,105 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 122 selfloop transitions, 74 changer transitions 0/200 dead transitions. [2024-06-14 12:15:49,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 200 transitions, 2180 flow [2024-06-14 12:15:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:15:49,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:15:49,110 INFO L175 Difference]: Start difference. First operand has 142 places, 168 transitions, 1736 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:15:49,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 200 transitions, 2180 flow [2024-06-14 12:15:49,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 200 transitions, 1968 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:49,280 INFO L231 Difference]: Finished difference. Result has 142 places, 167 transitions, 1616 flow [2024-06-14 12:15:49,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1616, PETRI_PLACES=142, PETRI_TRANSITIONS=167} [2024-06-14 12:15:49,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-14 12:15:49,289 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 167 transitions, 1616 flow [2024-06-14 12:15:49,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:49,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:49,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:49,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:15:49,289 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:49,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1612859775, now seen corresponding path program 2 times [2024-06-14 12:15:49,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:49,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061664990] [2024-06-14 12:15:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:49,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:50,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:50,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061664990] [2024-06-14 12:15:50,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061664990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:50,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:50,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:50,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766670517] [2024-06-14 12:15:50,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:50,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:50,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:50,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:50,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:50,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:50,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 167 transitions, 1616 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:50,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:50,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:50,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:50,937 INFO L124 PetriNetUnfolderBase]: 2458/3875 cut-off events. [2024-06-14 12:15:50,937 INFO L125 PetriNetUnfolderBase]: For 147990/148004 co-relation queries the response was YES. [2024-06-14 12:15:50,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24307 conditions, 3875 events. 2458/3875 cut-off events. For 147990/148004 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21205 event pairs, 723 based on Foata normal form. 13/3884 useless extension candidates. Maximal degree in co-relation 24238. Up to 3706 conditions per place. [2024-06-14 12:15:50,967 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 155 selfloop transitions, 28 changer transitions 0/187 dead transitions. [2024-06-14 12:15:50,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 187 transitions, 2205 flow [2024-06-14 12:15:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:15:50,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-14 12:15:50,968 INFO L175 Difference]: Start difference. First operand has 142 places, 167 transitions, 1616 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:15:50,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 187 transitions, 2205 flow [2024-06-14 12:15:51,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 187 transitions, 1998 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:51,121 INFO L231 Difference]: Finished difference. Result has 143 places, 175 transitions, 1596 flow [2024-06-14 12:15:51,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1596, PETRI_PLACES=143, PETRI_TRANSITIONS=175} [2024-06-14 12:15:51,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-14 12:15:51,122 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 175 transitions, 1596 flow [2024-06-14 12:15:51,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:51,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:51,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:51,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:15:51,122 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:51,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1832043687, now seen corresponding path program 3 times [2024-06-14 12:15:51,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:51,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826571200] [2024-06-14 12:15:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:51,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:52,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:52,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826571200] [2024-06-14 12:15:52,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826571200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:52,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:52,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:52,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363574499] [2024-06-14 12:15:52,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:52,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:52,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:52,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:52,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:52,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:52,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 175 transitions, 1596 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:52,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:52,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:52,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:52,919 INFO L124 PetriNetUnfolderBase]: 2455/3871 cut-off events. [2024-06-14 12:15:52,919 INFO L125 PetriNetUnfolderBase]: For 153219/153233 co-relation queries the response was YES. [2024-06-14 12:15:52,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23886 conditions, 3871 events. 2455/3871 cut-off events. For 153219/153233 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21106 event pairs, 723 based on Foata normal form. 13/3880 useless extension candidates. Maximal degree in co-relation 23816. Up to 3712 conditions per place. [2024-06-14 12:15:52,953 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 162 selfloop transitions, 21 changer transitions 0/187 dead transitions. [2024-06-14 12:15:52,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 187 transitions, 2008 flow [2024-06-14 12:15:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 12:15:52,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-14 12:15:52,954 INFO L175 Difference]: Start difference. First operand has 143 places, 175 transitions, 1596 flow. Second operand 7 states and 108 transitions. [2024-06-14 12:15:52,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 187 transitions, 2008 flow [2024-06-14 12:15:53,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 187 transitions, 1911 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:53,114 INFO L231 Difference]: Finished difference. Result has 147 places, 176 transitions, 1556 flow [2024-06-14 12:15:53,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1556, PETRI_PLACES=147, PETRI_TRANSITIONS=176} [2024-06-14 12:15:53,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-14 12:15:53,115 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 176 transitions, 1556 flow [2024-06-14 12:15:53,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:53,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:53,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:53,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:15:53,116 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)] === [2024-06-14 12:15:53,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:53,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1832043315, now seen corresponding path program 3 times [2024-06-14 12:15:53,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:53,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331989773] [2024-06-14 12:15:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:53,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:53,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:53,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331989773] [2024-06-14 12:15:53,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331989773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:53,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:53,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:53,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923017963] [2024-06-14 12:15:53,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:53,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:53,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:53,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:53,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:53,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:53,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 176 transitions, 1556 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:53,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:53,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:53,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:54,541 INFO L124 PetriNetUnfolderBase]: 2459/3866 cut-off events. [2024-06-14 12:15:54,541 INFO L125 PetriNetUnfolderBase]: For 159708/159719 co-relation queries the response was YES. [2024-06-14 12:15:54,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24040 conditions, 3866 events. 2459/3866 cut-off events. For 159708/159719 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21059 event pairs, 734 based on Foata normal form. 6/3860 useless extension candidates. Maximal degree in co-relation 23968. Up to 3538 conditions per place. [2024-06-14 12:15:54,571 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 140 selfloop transitions, 52 changer transitions 0/196 dead transitions. [2024-06-14 12:15:54,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 196 transitions, 2270 flow [2024-06-14 12:15:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:15:54,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-14 12:15:54,572 INFO L175 Difference]: Start difference. First operand has 147 places, 176 transitions, 1556 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:15:54,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 196 transitions, 2270 flow [2024-06-14 12:15:54,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 196 transitions, 2224 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:54,719 INFO L231 Difference]: Finished difference. Result has 150 places, 184 transitions, 1774 flow [2024-06-14 12:15:54,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1774, PETRI_PLACES=150, PETRI_TRANSITIONS=184} [2024-06-14 12:15:54,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 12:15:54,720 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 184 transitions, 1774 flow [2024-06-14 12:15:54,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:54,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:54,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:54,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:15:54,720 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)] === [2024-06-14 12:15:54,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:54,721 INFO L85 PathProgramCache]: Analyzing trace with hash 198599691, now seen corresponding path program 1 times [2024-06-14 12:15:54,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:54,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22828754] [2024-06-14 12:15:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:54,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:55,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:55,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22828754] [2024-06-14 12:15:55,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22828754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:55,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:55,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861280923] [2024-06-14 12:15:55,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:55,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:55,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:55,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:55,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:55,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:55,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 184 transitions, 1774 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:55,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:55,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:55,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:56,112 INFO L124 PetriNetUnfolderBase]: 2365/3777 cut-off events. [2024-06-14 12:15:56,112 INFO L125 PetriNetUnfolderBase]: For 171386/171390 co-relation queries the response was YES. [2024-06-14 12:15:56,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24453 conditions, 3777 events. 2365/3777 cut-off events. For 171386/171390 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20930 event pairs, 698 based on Foata normal form. 3/3778 useless extension candidates. Maximal degree in co-relation 24379. Up to 3537 conditions per place. [2024-06-14 12:15:56,143 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 17 changer transitions 0/206 dead transitions. [2024-06-14 12:15:56,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 206 transitions, 2272 flow [2024-06-14 12:15:56,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:56,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:15:56,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 12:15:56,144 INFO L175 Difference]: Start difference. First operand has 150 places, 184 transitions, 1774 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:15:56,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 206 transitions, 2272 flow [2024-06-14 12:15:56,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 206 transitions, 2108 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:56,281 INFO L231 Difference]: Finished difference. Result has 154 places, 190 transitions, 1720 flow [2024-06-14 12:15:56,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1720, PETRI_PLACES=154, PETRI_TRANSITIONS=190} [2024-06-14 12:15:56,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-14 12:15:56,281 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 190 transitions, 1720 flow [2024-06-14 12:15:56,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:56,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:56,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:56,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:15:56,282 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)] === [2024-06-14 12:15:56,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:56,283 INFO L85 PathProgramCache]: Analyzing trace with hash 106266111, now seen corresponding path program 1 times [2024-06-14 12:15:56,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:56,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523711591] [2024-06-14 12:15:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:56,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:57,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:57,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523711591] [2024-06-14 12:15:57,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523711591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:57,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:57,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:57,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141544365] [2024-06-14 12:15:57,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:57,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:57,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:57,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:57,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:57,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 190 transitions, 1720 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:57,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:57,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:57,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:57,939 INFO L124 PetriNetUnfolderBase]: 2375/3786 cut-off events. [2024-06-14 12:15:57,939 INFO L125 PetriNetUnfolderBase]: For 178251/178255 co-relation queries the response was YES. [2024-06-14 12:15:57,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24728 conditions, 3786 events. 2375/3786 cut-off events. For 178251/178255 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20885 event pairs, 697 based on Foata normal form. 4/3788 useless extension candidates. Maximal degree in co-relation 24652. Up to 3566 conditions per place. [2024-06-14 12:15:57,972 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 183 selfloop transitions, 14 changer transitions 0/206 dead transitions. [2024-06-14 12:15:57,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 206 transitions, 2190 flow [2024-06-14 12:15:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:15:57,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-14 12:15:57,974 INFO L175 Difference]: Start difference. First operand has 154 places, 190 transitions, 1720 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:15:57,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 206 transitions, 2190 flow [2024-06-14 12:15:58,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 206 transitions, 2138 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:58,185 INFO L231 Difference]: Finished difference. Result has 158 places, 193 transitions, 1746 flow [2024-06-14 12:15:58,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1746, PETRI_PLACES=158, PETRI_TRANSITIONS=193} [2024-06-14 12:15:58,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 12:15:58,185 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 193 transitions, 1746 flow [2024-06-14 12:15:58,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:58,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:58,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:58,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:15:58,186 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)] === [2024-06-14 12:15:58,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1655096493, now seen corresponding path program 2 times [2024-06-14 12:15:58,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:58,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119253156] [2024-06-14 12:15:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:58,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:58,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119253156] [2024-06-14 12:15:58,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119253156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:58,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:58,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:58,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388945024] [2024-06-14 12:15:58,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:58,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:58,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:58,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:58,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:58,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 193 transitions, 1746 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:58,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:58,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:58,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:59,599 INFO L124 PetriNetUnfolderBase]: 2393/3811 cut-off events. [2024-06-14 12:15:59,600 INFO L125 PetriNetUnfolderBase]: For 185827/185831 co-relation queries the response was YES. [2024-06-14 12:15:59,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25333 conditions, 3811 events. 2393/3811 cut-off events. For 185827/185831 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21035 event pairs, 697 based on Foata normal form. 3/3812 useless extension candidates. Maximal degree in co-relation 25256. Up to 3563 conditions per place. [2024-06-14 12:15:59,635 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 24 changer transitions 0/214 dead transitions. [2024-06-14 12:15:59,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 214 transitions, 2384 flow [2024-06-14 12:15:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:15:59,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-14 12:15:59,637 INFO L175 Difference]: Start difference. First operand has 158 places, 193 transitions, 1746 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:15:59,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 214 transitions, 2384 flow [2024-06-14 12:15:59,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 214 transitions, 2330 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:59,826 INFO L231 Difference]: Finished difference. Result has 160 places, 199 transitions, 1848 flow [2024-06-14 12:15:59,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1848, PETRI_PLACES=160, PETRI_TRANSITIONS=199} [2024-06-14 12:15:59,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-14 12:15:59,826 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 199 transitions, 1848 flow [2024-06-14 12:15:59,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:59,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:59,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:59,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:15:59,827 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:59,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:59,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1832234709, now seen corresponding path program 2 times [2024-06-14 12:15:59,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:59,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347622449] [2024-06-14 12:15:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:59,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:00,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:00,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347622449] [2024-06-14 12:16:00,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347622449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:00,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:00,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:00,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597063730] [2024-06-14 12:16:00,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:00,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:00,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:00,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:00,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:00,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 199 transitions, 1848 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:00,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:00,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:00,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:01,588 INFO L124 PetriNetUnfolderBase]: 2405/3831 cut-off events. [2024-06-14 12:16:01,588 INFO L125 PetriNetUnfolderBase]: For 197582/197592 co-relation queries the response was YES. [2024-06-14 12:16:01,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25944 conditions, 3831 events. 2405/3831 cut-off events. For 197582/197592 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21193 event pairs, 700 based on Foata normal form. 8/3836 useless extension candidates. Maximal degree in co-relation 25866. Up to 3574 conditions per place. [2024-06-14 12:16:01,618 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 180 selfloop transitions, 29 changer transitions 0/218 dead transitions. [2024-06-14 12:16:01,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 218 transitions, 2510 flow [2024-06-14 12:16:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:16:01,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-14 12:16:01,619 INFO L175 Difference]: Start difference. First operand has 160 places, 199 transitions, 1848 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:16:01,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 218 transitions, 2510 flow [2024-06-14 12:16:01,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 218 transitions, 2438 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:01,825 INFO L231 Difference]: Finished difference. Result has 164 places, 206 transitions, 1984 flow [2024-06-14 12:16:01,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1984, PETRI_PLACES=164, PETRI_TRANSITIONS=206} [2024-06-14 12:16:01,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-14 12:16:01,826 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 206 transitions, 1984 flow [2024-06-14 12:16:01,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:01,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:01,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:01,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:16:01,828 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:01,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1354703775, now seen corresponding path program 3 times [2024-06-14 12:16:01,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:01,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552530412] [2024-06-14 12:16:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:01,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:02,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:02,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552530412] [2024-06-14 12:16:02,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552530412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:02,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:02,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:02,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224743118] [2024-06-14 12:16:02,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:02,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:02,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:02,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:02,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:02,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:02,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 206 transitions, 1984 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:02,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:02,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:02,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:03,384 INFO L124 PetriNetUnfolderBase]: 2396/3819 cut-off events. [2024-06-14 12:16:03,385 INFO L125 PetriNetUnfolderBase]: For 202867/202877 co-relation queries the response was YES. [2024-06-14 12:16:03,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26132 conditions, 3819 events. 2396/3819 cut-off events. For 202867/202877 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21115 event pairs, 700 based on Foata normal form. 8/3824 useless extension candidates. Maximal degree in co-relation 26052. Up to 3591 conditions per place. [2024-06-14 12:16:03,419 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 19 changer transitions 0/218 dead transitions. [2024-06-14 12:16:03,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 218 transitions, 2462 flow [2024-06-14 12:16:03,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:16:03,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-14 12:16:03,421 INFO L175 Difference]: Start difference. First operand has 164 places, 206 transitions, 1984 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:16:03,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 218 transitions, 2462 flow [2024-06-14 12:16:03,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 218 transitions, 2398 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:03,704 INFO L231 Difference]: Finished difference. Result has 168 places, 208 transitions, 2000 flow [2024-06-14 12:16:03,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2000, PETRI_PLACES=168, PETRI_TRANSITIONS=208} [2024-06-14 12:16:03,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-14 12:16:03,705 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 208 transitions, 2000 flow [2024-06-14 12:16:03,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:03,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:03,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:03,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:16:03,706 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:03,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1832228013, now seen corresponding path program 3 times [2024-06-14 12:16:03,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:03,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347482577] [2024-06-14 12:16:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:03,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:04,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:04,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347482577] [2024-06-14 12:16:04,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347482577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:04,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:04,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:04,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020566131] [2024-06-14 12:16:04,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:04,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:04,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:04,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:04,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:04,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:04,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 208 transitions, 2000 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:04,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:04,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:04,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:05,173 INFO L124 PetriNetUnfolderBase]: 2363/3785 cut-off events. [2024-06-14 12:16:05,173 INFO L125 PetriNetUnfolderBase]: For 208292/208299 co-relation queries the response was YES. [2024-06-14 12:16:05,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25978 conditions, 3785 events. 2363/3785 cut-off events. For 208292/208299 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21110 event pairs, 689 based on Foata normal form. 3/3784 useless extension candidates. Maximal degree in co-relation 25896. Up to 3522 conditions per place. [2024-06-14 12:16:05,208 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 183 selfloop transitions, 31 changer transitions 0/223 dead transitions. [2024-06-14 12:16:05,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 223 transitions, 2610 flow [2024-06-14 12:16:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:16:05,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 12:16:05,209 INFO L175 Difference]: Start difference. First operand has 168 places, 208 transitions, 2000 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:16:05,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 223 transitions, 2610 flow [2024-06-14 12:16:05,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 223 transitions, 2548 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:05,466 INFO L231 Difference]: Finished difference. Result has 170 places, 211 transitions, 2066 flow [2024-06-14 12:16:05,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2066, PETRI_PLACES=170, PETRI_TRANSITIONS=211} [2024-06-14 12:16:05,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-14 12:16:05,467 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 211 transitions, 2066 flow [2024-06-14 12:16:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:05,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:05,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:05,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:16:05,468 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:05,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:05,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1832474277, now seen corresponding path program 1 times [2024-06-14 12:16:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:05,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386342762] [2024-06-14 12:16:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:06,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:06,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386342762] [2024-06-14 12:16:06,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386342762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:06,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:06,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334649052] [2024-06-14 12:16:06,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:06,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:06,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:06,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:06,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:06,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:06,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 211 transitions, 2066 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:06,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:06,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:06,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:07,573 INFO L124 PetriNetUnfolderBase]: 2499/3917 cut-off events. [2024-06-14 12:16:07,573 INFO L125 PetriNetUnfolderBase]: For 212473/212477 co-relation queries the response was YES. [2024-06-14 12:16:07,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27097 conditions, 3917 events. 2499/3917 cut-off events. For 212473/212477 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21250 event pairs, 728 based on Foata normal form. 2/3917 useless extension candidates. Maximal degree in co-relation 27014. Up to 3797 conditions per place. [2024-06-14 12:16:07,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 17 changer transitions 0/221 dead transitions. [2024-06-14 12:16:07,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 221 transitions, 2526 flow [2024-06-14 12:16:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:16:07,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-14 12:16:07,610 INFO L175 Difference]: Start difference. First operand has 170 places, 211 transitions, 2066 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:16:07,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 221 transitions, 2526 flow [2024-06-14 12:16:07,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 221 transitions, 2386 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:07,994 INFO L231 Difference]: Finished difference. Result has 173 places, 211 transitions, 1966 flow [2024-06-14 12:16:07,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1966, PETRI_PLACES=173, PETRI_TRANSITIONS=211} [2024-06-14 12:16:07,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-14 12:16:07,995 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 211 transitions, 1966 flow [2024-06-14 12:16:07,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:07,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:07,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:07,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:16:07,995 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:07,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:07,996 INFO L85 PathProgramCache]: Analyzing trace with hash -319486561, now seen corresponding path program 1 times [2024-06-14 12:16:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:07,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354756643] [2024-06-14 12:16:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:07,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:08,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:08,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354756643] [2024-06-14 12:16:08,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354756643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:08,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:08,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:08,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589497196] [2024-06-14 12:16:08,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:08,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:08,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:08,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:08,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:08,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:08,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 211 transitions, 1966 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:08,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:08,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:08,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:09,597 INFO L124 PetriNetUnfolderBase]: 2509/3934 cut-off events. [2024-06-14 12:16:09,597 INFO L125 PetriNetUnfolderBase]: For 221175/221187 co-relation queries the response was YES. [2024-06-14 12:16:09,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27203 conditions, 3934 events. 2509/3934 cut-off events. For 221175/221187 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21416 event pairs, 675 based on Foata normal form. 12/3943 useless extension candidates. Maximal degree in co-relation 27119. Up to 3672 conditions per place. [2024-06-14 12:16:09,630 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 194 selfloop transitions, 40 changer transitions 0/238 dead transitions. [2024-06-14 12:16:09,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 238 transitions, 2579 flow [2024-06-14 12:16:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:16:09,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:16:09,631 INFO L175 Difference]: Start difference. First operand has 173 places, 211 transitions, 1966 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:16:09,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 238 transitions, 2579 flow [2024-06-14 12:16:09,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 238 transitions, 2487 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 12:16:09,934 INFO L231 Difference]: Finished difference. Result has 173 places, 215 transitions, 2035 flow [2024-06-14 12:16:09,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2035, PETRI_PLACES=173, PETRI_TRANSITIONS=215} [2024-06-14 12:16:09,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-14 12:16:09,935 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 215 transitions, 2035 flow [2024-06-14 12:16:09,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:09,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:09,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:09,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:16:09,935 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:09,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:09,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1439160566, now seen corresponding path program 1 times [2024-06-14 12:16:09,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:09,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921088859] [2024-06-14 12:16:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:09,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:10,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:10,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921088859] [2024-06-14 12:16:10,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921088859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:10,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:10,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:10,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160836288] [2024-06-14 12:16:10,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:10,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:10,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:10,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:10,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:10,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 215 transitions, 2035 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:10,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:10,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:10,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:11,300 INFO L124 PetriNetUnfolderBase]: 2519/3943 cut-off events. [2024-06-14 12:16:11,300 INFO L125 PetriNetUnfolderBase]: For 230500/230510 co-relation queries the response was YES. [2024-06-14 12:16:11,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27997 conditions, 3943 events. 2519/3943 cut-off events. For 230500/230510 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21453 event pairs, 682 based on Foata normal form. 7/3947 useless extension candidates. Maximal degree in co-relation 27913. Up to 3688 conditions per place. [2024-06-14 12:16:11,335 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 36 changer transitions 0/238 dead transitions. [2024-06-14 12:16:11,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 238 transitions, 2620 flow [2024-06-14 12:16:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:16:11,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 12:16:11,336 INFO L175 Difference]: Start difference. First operand has 173 places, 215 transitions, 2035 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:16:11,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 238 transitions, 2620 flow [2024-06-14 12:16:11,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 238 transitions, 2487 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:11,731 INFO L231 Difference]: Finished difference. Result has 174 places, 219 transitions, 2046 flow [2024-06-14 12:16:11,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=174, PETRI_TRANSITIONS=219} [2024-06-14 12:16:11,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-14 12:16:11,731 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 219 transitions, 2046 flow [2024-06-14 12:16:11,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:11,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:11,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:11,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:16:11,732 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)] === [2024-06-14 12:16:11,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash 587875052, now seen corresponding path program 2 times [2024-06-14 12:16:11,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:11,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031236382] [2024-06-14 12:16:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:11,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:12,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031236382] [2024-06-14 12:16:12,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031236382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:12,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:12,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:12,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078387352] [2024-06-14 12:16:12,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:12,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:12,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:12,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:12,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 219 transitions, 2046 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:12,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:12,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:12,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:13,278 INFO L124 PetriNetUnfolderBase]: 2521/3945 cut-off events. [2024-06-14 12:16:13,282 INFO L125 PetriNetUnfolderBase]: For 237763/237773 co-relation queries the response was YES. [2024-06-14 12:16:13,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28092 conditions, 3945 events. 2521/3945 cut-off events. For 237763/237773 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21452 event pairs, 683 based on Foata normal form. 7/3949 useless extension candidates. Maximal degree in co-relation 28007. Up to 3651 conditions per place. [2024-06-14 12:16:13,316 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 45 changer transitions 0/238 dead transitions. [2024-06-14 12:16:13,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 238 transitions, 2718 flow [2024-06-14 12:16:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:16:13,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:16:13,318 INFO L175 Difference]: Start difference. First operand has 174 places, 219 transitions, 2046 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:16:13,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 238 transitions, 2718 flow [2024-06-14 12:16:13,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 238 transitions, 2619 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:13,707 INFO L231 Difference]: Finished difference. Result has 176 places, 222 transitions, 2102 flow [2024-06-14 12:16:13,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2102, PETRI_PLACES=176, PETRI_TRANSITIONS=222} [2024-06-14 12:16:13,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-14 12:16:13,708 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 222 transitions, 2102 flow [2024-06-14 12:16:13,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:13,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:13,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:13,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:16:13,709 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)] === [2024-06-14 12:16:13,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:13,709 INFO L85 PathProgramCache]: Analyzing trace with hash 587871425, now seen corresponding path program 2 times [2024-06-14 12:16:13,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:13,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140714678] [2024-06-14 12:16:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:13,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:14,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:14,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140714678] [2024-06-14 12:16:14,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140714678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:14,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:14,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:14,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679040527] [2024-06-14 12:16:14,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:14,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:14,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:14,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:14,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 222 transitions, 2102 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:14,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:14,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:14,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:15,370 INFO L124 PetriNetUnfolderBase]: 2533/3964 cut-off events. [2024-06-14 12:16:15,370 INFO L125 PetriNetUnfolderBase]: For 247343/247353 co-relation queries the response was YES. [2024-06-14 12:16:15,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28385 conditions, 3964 events. 2533/3964 cut-off events. For 247343/247353 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21559 event pairs, 683 based on Foata normal form. 7/3968 useless extension candidates. Maximal degree in co-relation 28299. Up to 3661 conditions per place. [2024-06-14 12:16:15,407 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 50 changer transitions 0/243 dead transitions. [2024-06-14 12:16:15,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 243 transitions, 2808 flow [2024-06-14 12:16:15,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:16:15,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:16:15,408 INFO L175 Difference]: Start difference. First operand has 176 places, 222 transitions, 2102 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:16:15,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 243 transitions, 2808 flow [2024-06-14 12:16:15,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 243 transitions, 2708 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:15,832 INFO L231 Difference]: Finished difference. Result has 180 places, 226 transitions, 2191 flow [2024-06-14 12:16:15,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2191, PETRI_PLACES=180, PETRI_TRANSITIONS=226} [2024-06-14 12:16:15,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-14 12:16:15,833 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 226 transitions, 2191 flow [2024-06-14 12:16:15,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:15,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:15,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:15,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:16:15,833 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)] === [2024-06-14 12:16:15,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1433439113, now seen corresponding path program 3 times [2024-06-14 12:16:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:15,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457428106] [2024-06-14 12:16:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:16,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:16,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457428106] [2024-06-14 12:16:16,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457428106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:16,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:16,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:16,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356045512] [2024-06-14 12:16:16,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:16,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:16,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:16,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:17,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:17,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 226 transitions, 2191 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:17,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:17,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:17,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:17,729 INFO L124 PetriNetUnfolderBase]: 2561/4008 cut-off events. [2024-06-14 12:16:17,729 INFO L125 PetriNetUnfolderBase]: For 259879/259889 co-relation queries the response was YES. [2024-06-14 12:16:17,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29403 conditions, 4008 events. 2561/4008 cut-off events. For 259879/259889 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21933 event pairs, 683 based on Foata normal form. 7/4012 useless extension candidates. Maximal degree in co-relation 29316. Up to 3661 conditions per place. [2024-06-14 12:16:17,776 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 57 changer transitions 0/252 dead transitions. [2024-06-14 12:16:17,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 252 transitions, 3105 flow [2024-06-14 12:16:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:16:17,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:16:17,782 INFO L175 Difference]: Start difference. First operand has 180 places, 226 transitions, 2191 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:16:17,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 252 transitions, 3105 flow [2024-06-14 12:16:18,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 252 transitions, 2944 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:18,211 INFO L231 Difference]: Finished difference. Result has 183 places, 234 transitions, 2335 flow [2024-06-14 12:16:18,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2335, PETRI_PLACES=183, PETRI_TRANSITIONS=234} [2024-06-14 12:16:18,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-14 12:16:18,211 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 234 transitions, 2335 flow [2024-06-14 12:16:18,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:18,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:18,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:18,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:16:18,212 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:18,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1433438710, now seen corresponding path program 1 times [2024-06-14 12:16:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:18,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411793915] [2024-06-14 12:16:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:18,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:19,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:19,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411793915] [2024-06-14 12:16:19,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411793915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:19,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:19,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348525991] [2024-06-14 12:16:19,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:19,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:19,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:19,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:19,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:19,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:19,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 234 transitions, 2335 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:19,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:19,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:19,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:19,952 INFO L124 PetriNetUnfolderBase]: 2566/4020 cut-off events. [2024-06-14 12:16:19,953 INFO L125 PetriNetUnfolderBase]: For 268168/268174 co-relation queries the response was YES. [2024-06-14 12:16:19,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30153 conditions, 4020 events. 2566/4020 cut-off events. For 268168/268174 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21893 event pairs, 697 based on Foata normal form. 7/4025 useless extension candidates. Maximal degree in co-relation 30064. Up to 3872 conditions per place. [2024-06-14 12:16:19,992 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 19 changer transitions 0/254 dead transitions. [2024-06-14 12:16:19,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 254 transitions, 2958 flow [2024-06-14 12:16:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:16:19,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:16:19,994 INFO L175 Difference]: Start difference. First operand has 183 places, 234 transitions, 2335 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:16:19,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 254 transitions, 2958 flow [2024-06-14 12:16:20,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 254 transitions, 2811 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:20,455 INFO L231 Difference]: Finished difference. Result has 187 places, 237 transitions, 2304 flow [2024-06-14 12:16:20,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2304, PETRI_PLACES=187, PETRI_TRANSITIONS=237} [2024-06-14 12:16:20,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-14 12:16:20,455 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 237 transitions, 2304 flow [2024-06-14 12:16:20,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:20,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:20,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:20,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:16:20,456 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:20,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -243050742, now seen corresponding path program 3 times [2024-06-14 12:16:20,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:20,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937236298] [2024-06-14 12:16:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:20,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:21,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:21,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937236298] [2024-06-14 12:16:21,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937236298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:21,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:21,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:21,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768073285] [2024-06-14 12:16:21,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:21,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:21,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:21,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:21,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:21,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:21,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 237 transitions, 2304 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:21,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:21,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:21,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:21,830 INFO L124 PetriNetUnfolderBase]: 2559/4002 cut-off events. [2024-06-14 12:16:21,830 INFO L125 PetriNetUnfolderBase]: For 274453/274461 co-relation queries the response was YES. [2024-06-14 12:16:21,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30323 conditions, 4002 events. 2559/4002 cut-off events. For 274453/274461 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21787 event pairs, 686 based on Foata normal form. 3/3995 useless extension candidates. Maximal degree in co-relation 30232. Up to 3753 conditions per place. [2024-06-14 12:16:21,872 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 214 selfloop transitions, 36 changer transitions 0/254 dead transitions. [2024-06-14 12:16:21,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 254 transitions, 2862 flow [2024-06-14 12:16:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:16:21,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-14 12:16:21,873 INFO L175 Difference]: Start difference. First operand has 187 places, 237 transitions, 2304 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:16:21,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 254 transitions, 2862 flow [2024-06-14 12:16:22,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 254 transitions, 2744 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:22,258 INFO L231 Difference]: Finished difference. Result has 188 places, 237 transitions, 2265 flow [2024-06-14 12:16:22,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2265, PETRI_PLACES=188, PETRI_TRANSITIONS=237} [2024-06-14 12:16:22,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-14 12:16:22,258 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 237 transitions, 2265 flow [2024-06-14 12:16:22,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:22,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:22,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:22,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:16:22,259 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:22,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:22,259 INFO L85 PathProgramCache]: Analyzing trace with hash 809953006, now seen corresponding path program 4 times [2024-06-14 12:16:22,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:22,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545054631] [2024-06-14 12:16:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:22,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:22,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:22,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545054631] [2024-06-14 12:16:22,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545054631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:22,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:22,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:22,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149315664] [2024-06-14 12:16:22,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:22,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:22,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:22,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:22,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 237 transitions, 2265 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:22,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:22,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:22,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:23,697 INFO L124 PetriNetUnfolderBase]: 2564/4007 cut-off events. [2024-06-14 12:16:23,697 INFO L125 PetriNetUnfolderBase]: For 283670/283678 co-relation queries the response was YES. [2024-06-14 12:16:23,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30592 conditions, 4007 events. 2564/4007 cut-off events. For 283670/283678 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21806 event pairs, 682 based on Foata normal form. 3/4000 useless extension candidates. Maximal degree in co-relation 30500. Up to 3740 conditions per place. [2024-06-14 12:16:23,734 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 45 changer transitions 0/254 dead transitions. [2024-06-14 12:16:23,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 254 transitions, 2863 flow [2024-06-14 12:16:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:23,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:16:23,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-14 12:16:23,760 INFO L175 Difference]: Start difference. First operand has 188 places, 237 transitions, 2265 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:16:23,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 254 transitions, 2863 flow [2024-06-14 12:16:24,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 254 transitions, 2729 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:24,192 INFO L231 Difference]: Finished difference. Result has 188 places, 240 transitions, 2285 flow [2024-06-14 12:16:24,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2285, PETRI_PLACES=188, PETRI_TRANSITIONS=240} [2024-06-14 12:16:24,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-14 12:16:24,193 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 240 transitions, 2285 flow [2024-06-14 12:16:24,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:24,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:24,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:24,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:16:24,193 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)] === [2024-06-14 12:16:24,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash -807142384, now seen corresponding path program 5 times [2024-06-14 12:16:24,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:24,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594551108] [2024-06-14 12:16:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:24,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:24,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:24,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594551108] [2024-06-14 12:16:24,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594551108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:24,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:24,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247633826] [2024-06-14 12:16:24,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:24,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:24,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:24,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 240 transitions, 2285 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:24,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:24,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:24,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:25,593 INFO L124 PetriNetUnfolderBase]: 2566/4017 cut-off events. [2024-06-14 12:16:25,593 INFO L125 PetriNetUnfolderBase]: For 293457/293471 co-relation queries the response was YES. [2024-06-14 12:16:25,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30722 conditions, 4017 events. 2566/4017 cut-off events. For 293457/293471 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21890 event pairs, 705 based on Foata normal form. 8/4013 useless extension candidates. Maximal degree in co-relation 30629. Up to 3680 conditions per place. [2024-06-14 12:16:25,630 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 61 changer transitions 0/254 dead transitions. [2024-06-14 12:16:25,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 254 transitions, 2989 flow [2024-06-14 12:16:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:16:25,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-14 12:16:25,632 INFO L175 Difference]: Start difference. First operand has 188 places, 240 transitions, 2285 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:16:25,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 254 transitions, 2989 flow [2024-06-14 12:16:26,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 254 transitions, 2867 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:26,121 INFO L231 Difference]: Finished difference. Result has 190 places, 243 transitions, 2353 flow [2024-06-14 12:16:26,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2353, PETRI_PLACES=190, PETRI_TRANSITIONS=243} [2024-06-14 12:16:26,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-14 12:16:26,122 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 243 transitions, 2353 flow [2024-06-14 12:16:26,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:26,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:26,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:26,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:16:26,122 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)] === [2024-06-14 12:16:26,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:26,123 INFO L85 PathProgramCache]: Analyzing trace with hash 964486922, now seen corresponding path program 6 times [2024-06-14 12:16:26,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:26,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382402881] [2024-06-14 12:16:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:26,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:26,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:26,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382402881] [2024-06-14 12:16:26,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382402881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:26,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:26,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:26,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036621685] [2024-06-14 12:16:26,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:26,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:26,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:26,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 243 transitions, 2353 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:26,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:26,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:26,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:27,554 INFO L124 PetriNetUnfolderBase]: 2561/4007 cut-off events. [2024-06-14 12:16:27,555 INFO L125 PetriNetUnfolderBase]: For 299651/299665 co-relation queries the response was YES. [2024-06-14 12:16:27,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30786 conditions, 4007 events. 2561/4007 cut-off events. For 299651/299665 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21789 event pairs, 705 based on Foata normal form. 7/4002 useless extension candidates. Maximal degree in co-relation 30692. Up to 3675 conditions per place. [2024-06-14 12:16:27,591 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 184 selfloop transitions, 65 changer transitions 0/253 dead transitions. [2024-06-14 12:16:27,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 253 transitions, 2881 flow [2024-06-14 12:16:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:16:27,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-14 12:16:27,592 INFO L175 Difference]: Start difference. First operand has 190 places, 243 transitions, 2353 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:16:27,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 253 transitions, 2881 flow [2024-06-14 12:16:28,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 253 transitions, 2705 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:28,078 INFO L231 Difference]: Finished difference. Result has 193 places, 243 transitions, 2313 flow [2024-06-14 12:16:28,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2313, PETRI_PLACES=193, PETRI_TRANSITIONS=243} [2024-06-14 12:16:28,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-14 12:16:28,080 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 243 transitions, 2313 flow [2024-06-14 12:16:28,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:28,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:28,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:28,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:16:28,080 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)] === [2024-06-14 12:16:28,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:28,081 INFO L85 PathProgramCache]: Analyzing trace with hash 958769375, now seen corresponding path program 4 times [2024-06-14 12:16:28,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:28,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643423968] [2024-06-14 12:16:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:28,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:29,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:29,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643423968] [2024-06-14 12:16:29,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643423968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:29,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:29,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:29,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573811801] [2024-06-14 12:16:29,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:29,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:29,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:29,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 243 transitions, 2313 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:29,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:29,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:29,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:30,075 INFO L124 PetriNetUnfolderBase]: 2571/4023 cut-off events. [2024-06-14 12:16:30,076 INFO L125 PetriNetUnfolderBase]: For 311121/311135 co-relation queries the response was YES. [2024-06-14 12:16:30,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31021 conditions, 4023 events. 2571/4023 cut-off events. For 311121/311135 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21904 event pairs, 705 based on Foata normal form. 8/4019 useless extension candidates. Maximal degree in co-relation 30926. Up to 3683 conditions per place. [2024-06-14 12:16:30,114 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 187 selfloop transitions, 67 changer transitions 0/258 dead transitions. [2024-06-14 12:16:30,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 258 transitions, 2945 flow [2024-06-14 12:16:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:16:30,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:16:30,116 INFO L175 Difference]: Start difference. First operand has 193 places, 243 transitions, 2313 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:16:30,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 258 transitions, 2945 flow [2024-06-14 12:16:30,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 258 transitions, 2775 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:30,631 INFO L231 Difference]: Finished difference. Result has 194 places, 247 transitions, 2384 flow [2024-06-14 12:16:30,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=194, PETRI_TRANSITIONS=247} [2024-06-14 12:16:30,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-14 12:16:30,631 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 247 transitions, 2384 flow [2024-06-14 12:16:30,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:30,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:30,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:30,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:16:30,632 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:30,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:30,633 INFO L85 PathProgramCache]: Analyzing trace with hash 971680968, now seen corresponding path program 2 times [2024-06-14 12:16:30,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:30,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457709063] [2024-06-14 12:16:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:30,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:31,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:31,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457709063] [2024-06-14 12:16:31,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457709063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:31,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:31,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:31,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193256021] [2024-06-14 12:16:31,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:31,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:31,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:31,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:31,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:31,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:31,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 247 transitions, 2384 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:31,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:31,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:31,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:32,523 INFO L124 PetriNetUnfolderBase]: 2576/4032 cut-off events. [2024-06-14 12:16:32,523 INFO L125 PetriNetUnfolderBase]: For 320544/320548 co-relation queries the response was YES. [2024-06-14 12:16:32,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31666 conditions, 4032 events. 2576/4032 cut-off events. For 320544/320548 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21961 event pairs, 725 based on Foata normal form. 2/4032 useless extension candidates. Maximal degree in co-relation 31570. Up to 3905 conditions per place. [2024-06-14 12:16:32,562 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 17 changer transitions 0/260 dead transitions. [2024-06-14 12:16:32,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 260 transitions, 2996 flow [2024-06-14 12:16:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:16:32,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-14 12:16:32,564 INFO L175 Difference]: Start difference. First operand has 194 places, 247 transitions, 2384 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:16:32,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 260 transitions, 2996 flow [2024-06-14 12:16:32,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 260 transitions, 2783 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:32,973 INFO L231 Difference]: Finished difference. Result has 196 places, 250 transitions, 2291 flow [2024-06-14 12:16:32,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2171, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2291, PETRI_PLACES=196, PETRI_TRANSITIONS=250} [2024-06-14 12:16:32,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-14 12:16:32,974 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 250 transitions, 2291 flow [2024-06-14 12:16:32,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:32,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:32,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:32,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:16:32,974 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:32,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:32,975 INFO L85 PathProgramCache]: Analyzing trace with hash 958780535, now seen corresponding path program 5 times [2024-06-14 12:16:32,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:32,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336741762] [2024-06-14 12:16:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:32,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:33,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:33,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336741762] [2024-06-14 12:16:33,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336741762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:33,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:33,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:33,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115864404] [2024-06-14 12:16:33,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:33,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:33,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:34,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:34,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 250 transitions, 2291 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:34,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:34,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:34,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:34,680 INFO L124 PetriNetUnfolderBase]: 2604/4074 cut-off events. [2024-06-14 12:16:34,681 INFO L125 PetriNetUnfolderBase]: For 335093/335107 co-relation queries the response was YES. [2024-06-14 12:16:34,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32334 conditions, 4074 events. 2604/4074 cut-off events. For 335093/335107 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22240 event pairs, 705 based on Foata normal form. 8/4070 useless extension candidates. Maximal degree in co-relation 32237. Up to 3701 conditions per place. [2024-06-14 12:16:34,724 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 71 changer transitions 0/270 dead transitions. [2024-06-14 12:16:34,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 270 transitions, 3171 flow [2024-06-14 12:16:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:16:34,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 12:16:34,725 INFO L175 Difference]: Start difference. First operand has 196 places, 250 transitions, 2291 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:16:34,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 270 transitions, 3171 flow [2024-06-14 12:16:35,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 270 transitions, 3073 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:35,213 INFO L231 Difference]: Finished difference. Result has 199 places, 258 transitions, 2560 flow [2024-06-14 12:16:35,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2560, PETRI_PLACES=199, PETRI_TRANSITIONS=258} [2024-06-14 12:16:35,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-14 12:16:35,213 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 258 transitions, 2560 flow [2024-06-14 12:16:35,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:35,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:35,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:35,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:16:35,214 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:35,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:35,214 INFO L85 PathProgramCache]: Analyzing trace with hash 971667948, now seen corresponding path program 3 times [2024-06-14 12:16:35,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:35,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750353748] [2024-06-14 12:16:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:35,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:36,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:36,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750353748] [2024-06-14 12:16:36,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750353748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:36,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:36,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:36,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348313186] [2024-06-14 12:16:36,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:36,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:36,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:36,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:36,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:36,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 258 transitions, 2560 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:36,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:36,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:36,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:37,023 INFO L124 PetriNetUnfolderBase]: 2622/4109 cut-off events. [2024-06-14 12:16:37,023 INFO L125 PetriNetUnfolderBase]: For 357685/357699 co-relation queries the response was YES. [2024-06-14 12:16:37,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33594 conditions, 4109 events. 2622/4109 cut-off events. For 357685/357699 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22540 event pairs, 690 based on Foata normal form. 14/4119 useless extension candidates. Maximal degree in co-relation 33495. Up to 3903 conditions per place. [2024-06-14 12:16:37,076 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 44 changer transitions 0/283 dead transitions. [2024-06-14 12:16:37,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 283 transitions, 3673 flow [2024-06-14 12:16:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:16:37,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:16:37,078 INFO L175 Difference]: Start difference. First operand has 199 places, 258 transitions, 2560 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:16:37,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 283 transitions, 3673 flow [2024-06-14 12:16:37,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 283 transitions, 3478 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:37,569 INFO L231 Difference]: Finished difference. Result has 203 places, 267 transitions, 2711 flow [2024-06-14 12:16:37,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2711, PETRI_PLACES=203, PETRI_TRANSITIONS=267} [2024-06-14 12:16:37,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-14 12:16:37,569 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 267 transitions, 2711 flow [2024-06-14 12:16:37,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:37,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:37,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:37,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:16:37,570 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:37,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash 971667545, now seen corresponding path program 6 times [2024-06-14 12:16:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:37,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470439730] [2024-06-14 12:16:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:37,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:38,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470439730] [2024-06-14 12:16:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470439730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:38,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:38,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:38,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544071528] [2024-06-14 12:16:38,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:38,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:38,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:38,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:38,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 267 transitions, 2711 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:38,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:38,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:38,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:39,489 INFO L124 PetriNetUnfolderBase]: 2626/4106 cut-off events. [2024-06-14 12:16:39,490 INFO L125 PetriNetUnfolderBase]: For 367127/367141 co-relation queries the response was YES. [2024-06-14 12:16:39,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33880 conditions, 4106 events. 2626/4106 cut-off events. For 367127/367141 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22450 event pairs, 702 based on Foata normal form. 8/4102 useless extension candidates. Maximal degree in co-relation 33779. Up to 3652 conditions per place. [2024-06-14 12:16:39,528 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 194 selfloop transitions, 97 changer transitions 0/295 dead transitions. [2024-06-14 12:16:39,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 295 transitions, 3849 flow [2024-06-14 12:16:39,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:16:39,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:16:39,529 INFO L175 Difference]: Start difference. First operand has 203 places, 267 transitions, 2711 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:16:39,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 295 transitions, 3849 flow [2024-06-14 12:16:40,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 295 transitions, 3742 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:40,047 INFO L231 Difference]: Finished difference. Result has 210 places, 282 transitions, 3153 flow [2024-06-14 12:16:40,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3153, PETRI_PLACES=210, PETRI_TRANSITIONS=282} [2024-06-14 12:16:40,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-14 12:16:40,047 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 282 transitions, 3153 flow [2024-06-14 12:16:40,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:40,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:40,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:40,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:16:40,048 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:40,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash -807134448, now seen corresponding path program 4 times [2024-06-14 12:16:40,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:40,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554570876] [2024-06-14 12:16:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:40,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:41,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:41,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554570876] [2024-06-14 12:16:41,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554570876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:41,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:41,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:41,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244909136] [2024-06-14 12:16:41,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:41,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:41,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:41,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:41,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:41,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 282 transitions, 3153 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:41,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:41,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:41,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:41,963 INFO L124 PetriNetUnfolderBase]: 2628/4119 cut-off events. [2024-06-14 12:16:41,963 INFO L125 PetriNetUnfolderBase]: For 380498/380512 co-relation queries the response was YES. [2024-06-14 12:16:41,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34851 conditions, 4119 events. 2628/4119 cut-off events. For 380498/380512 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22608 event pairs, 690 based on Foata normal form. 14/4129 useless extension candidates. Maximal degree in co-relation 34746. Up to 3950 conditions per place. [2024-06-14 12:16:42,007 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 270 selfloop transitions, 24 changer transitions 0/298 dead transitions. [2024-06-14 12:16:42,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 298 transitions, 3872 flow [2024-06-14 12:16:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:16:42,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 12:16:42,012 INFO L175 Difference]: Start difference. First operand has 210 places, 282 transitions, 3153 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:16:42,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 298 transitions, 3872 flow [2024-06-14 12:16:42,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 298 transitions, 3653 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:42,612 INFO L231 Difference]: Finished difference. Result has 215 places, 285 transitions, 3076 flow [2024-06-14 12:16:42,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2934, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3076, PETRI_PLACES=215, PETRI_TRANSITIONS=285} [2024-06-14 12:16:42,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-14 12:16:42,612 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 285 transitions, 3076 flow [2024-06-14 12:16:42,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:16:42,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:42,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:42,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:16:42,613 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:42,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash -235424246, now seen corresponding path program 1 times [2024-06-14 12:16:42,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:42,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129103566] [2024-06-14 12:16:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:42,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:43,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:43,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129103566] [2024-06-14 12:16:43,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129103566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:43,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:43,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:43,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575381955] [2024-06-14 12:16:43,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:43,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:43,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:43,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:43,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:43,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 285 transitions, 3076 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:43,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:43,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:43,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:44,281 INFO L124 PetriNetUnfolderBase]: 2542/4024 cut-off events. [2024-06-14 12:16:44,281 INFO L125 PetriNetUnfolderBase]: For 382717/382721 co-relation queries the response was YES. [2024-06-14 12:16:44,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33670 conditions, 4024 events. 2542/4024 cut-off events. For 382717/382721 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22314 event pairs, 689 based on Foata normal form. 2/4024 useless extension candidates. Maximal degree in co-relation 33563. Up to 3736 conditions per place. [2024-06-14 12:16:44,327 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 263 selfloop transitions, 19 changer transitions 0/301 dead transitions. [2024-06-14 12:16:44,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 301 transitions, 3688 flow [2024-06-14 12:16:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:16:44,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 12:16:44,328 INFO L175 Difference]: Start difference. First operand has 215 places, 285 transitions, 3076 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:16:44,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 301 transitions, 3688 flow [2024-06-14 12:16:45,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 301 transitions, 3558 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:45,088 INFO L231 Difference]: Finished difference. Result has 216 places, 285 transitions, 2994 flow [2024-06-14 12:16:45,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2994, PETRI_PLACES=216, PETRI_TRANSITIONS=285} [2024-06-14 12:16:45,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-14 12:16:45,089 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 285 transitions, 2994 flow [2024-06-14 12:16:45,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:45,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:45,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:45,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:16:45,090 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)] === [2024-06-14 12:16:45,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash 806242027, now seen corresponding path program 1 times [2024-06-14 12:16:45,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:45,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051546186] [2024-06-14 12:16:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:45,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:45,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051546186] [2024-06-14 12:16:45,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051546186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:45,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:45,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:45,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306163510] [2024-06-14 12:16:45,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:45,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:45,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:45,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:45,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:46,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:46,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 285 transitions, 2994 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:46,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:46,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:46,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:46,837 INFO L124 PetriNetUnfolderBase]: 2557/4047 cut-off events. [2024-06-14 12:16:46,837 INFO L125 PetriNetUnfolderBase]: For 399072/399076 co-relation queries the response was YES. [2024-06-14 12:16:46,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33872 conditions, 4047 events. 2557/4047 cut-off events. For 399072/399076 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22449 event pairs, 687 based on Foata normal form. 5/4050 useless extension candidates. Maximal degree in co-relation 33764. Up to 3750 conditions per place. [2024-06-14 12:16:46,882 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 20 changer transitions 0/306 dead transitions. [2024-06-14 12:16:46,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 306 transitions, 3668 flow [2024-06-14 12:16:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:16:46,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:16:46,883 INFO L175 Difference]: Start difference. First operand has 216 places, 285 transitions, 2994 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:16:46,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 306 transitions, 3668 flow [2024-06-14 12:16:47,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 306 transitions, 3620 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:47,668 INFO L231 Difference]: Finished difference. Result has 218 places, 288 transitions, 3044 flow [2024-06-14 12:16:47,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3044, PETRI_PLACES=218, PETRI_TRANSITIONS=288} [2024-06-14 12:16:47,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-14 12:16:47,669 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 288 transitions, 3044 flow [2024-06-14 12:16:47,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:47,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:47,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:47,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:16:47,669 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:47,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:47,670 INFO L85 PathProgramCache]: Analyzing trace with hash -231609231, now seen corresponding path program 2 times [2024-06-14 12:16:47,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:47,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077950739] [2024-06-14 12:16:47,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:47,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:48,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:48,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077950739] [2024-06-14 12:16:48,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077950739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:48,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:48,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:48,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322733764] [2024-06-14 12:16:48,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:48,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:48,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:48,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:48,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:48,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:48,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 288 transitions, 3044 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:48,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:48,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:48,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:49,525 INFO L124 PetriNetUnfolderBase]: 2596/4104 cut-off events. [2024-06-14 12:16:49,525 INFO L125 PetriNetUnfolderBase]: For 420159/420163 co-relation queries the response was YES. [2024-06-14 12:16:49,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34935 conditions, 4104 events. 2596/4104 cut-off events. For 420159/420163 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22812 event pairs, 690 based on Foata normal form. 7/4109 useless extension candidates. Maximal degree in co-relation 34826. Up to 3799 conditions per place. [2024-06-14 12:16:49,574 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 270 selfloop transitions, 23 changer transitions 0/312 dead transitions. [2024-06-14 12:16:49,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 312 transitions, 3930 flow [2024-06-14 12:16:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:16:49,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:16:49,576 INFO L175 Difference]: Start difference. First operand has 218 places, 288 transitions, 3044 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:16:49,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 312 transitions, 3930 flow [2024-06-14 12:16:50,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 312 transitions, 3854 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:50,687 INFO L231 Difference]: Finished difference. Result has 220 places, 295 transitions, 3140 flow [2024-06-14 12:16:50,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3140, PETRI_PLACES=220, PETRI_TRANSITIONS=295} [2024-06-14 12:16:50,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-14 12:16:50,688 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 295 transitions, 3140 flow [2024-06-14 12:16:50,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:50,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:50,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:50,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:16:50,688 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:50,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash -231614811, now seen corresponding path program 3 times [2024-06-14 12:16:50,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:50,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298736497] [2024-06-14 12:16:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:50,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:51,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:51,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298736497] [2024-06-14 12:16:51,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298736497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:51,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:51,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:51,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694733129] [2024-06-14 12:16:51,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:51,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:51,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:51,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:51,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:51,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 295 transitions, 3140 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:51,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:51,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:51,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:52,660 INFO L124 PetriNetUnfolderBase]: 2641/4168 cut-off events. [2024-06-14 12:16:52,661 INFO L125 PetriNetUnfolderBase]: For 438064/438068 co-relation queries the response was YES. [2024-06-14 12:16:52,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36281 conditions, 4168 events. 2641/4168 cut-off events. For 438064/438068 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23200 event pairs, 676 based on Foata normal form. 5/4169 useless extension candidates. Maximal degree in co-relation 36171. Up to 3787 conditions per place. [2024-06-14 12:16:52,724 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 41 changer transitions 0/319 dead transitions. [2024-06-14 12:16:52,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 319 transitions, 4052 flow [2024-06-14 12:16:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:16:52,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:16:52,726 INFO L175 Difference]: Start difference. First operand has 220 places, 295 transitions, 3140 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:16:52,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 319 transitions, 4052 flow [2024-06-14 12:16:53,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 319 transitions, 3978 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:53,723 INFO L231 Difference]: Finished difference. Result has 225 places, 301 transitions, 3300 flow [2024-06-14 12:16:53,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3066, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3300, PETRI_PLACES=225, PETRI_TRANSITIONS=301} [2024-06-14 12:16:53,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-14 12:16:53,723 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 301 transitions, 3300 flow [2024-06-14 12:16:53,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:53,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:53,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:53,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:16:53,724 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:53,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash 964500593, now seen corresponding path program 4 times [2024-06-14 12:16:53,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:53,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989174696] [2024-06-14 12:16:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:53,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:54,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:54,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989174696] [2024-06-14 12:16:54,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989174696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:54,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:54,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:54,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324745181] [2024-06-14 12:16:54,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:54,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:54,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:54,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:54,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:54,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:54,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 301 transitions, 3300 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:54,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:54,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:55,509 INFO L124 PetriNetUnfolderBase]: 2677/4225 cut-off events. [2024-06-14 12:16:55,509 INFO L125 PetriNetUnfolderBase]: For 460122/460132 co-relation queries the response was YES. [2024-06-14 12:16:55,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37480 conditions, 4225 events. 2677/4225 cut-off events. For 460122/460132 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23555 event pairs, 688 based on Foata normal form. 11/4233 useless extension candidates. Maximal degree in co-relation 37367. Up to 3903 conditions per place. [2024-06-14 12:16:55,637 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 28 changer transitions 0/322 dead transitions. [2024-06-14 12:16:55,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 322 transitions, 4232 flow [2024-06-14 12:16:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:16:55,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:16:55,645 INFO L175 Difference]: Start difference. First operand has 225 places, 301 transitions, 3300 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:16:55,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 322 transitions, 4232 flow [2024-06-14 12:16:56,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 322 transitions, 4152 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:56,455 INFO L231 Difference]: Finished difference. Result has 229 places, 308 transitions, 3430 flow [2024-06-14 12:16:56,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3220, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3430, PETRI_PLACES=229, PETRI_TRANSITIONS=308} [2024-06-14 12:16:56,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-14 12:16:56,457 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 308 transitions, 3430 flow [2024-06-14 12:16:56,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:56,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:56,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:56,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:16:56,458 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:56,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash 964495013, now seen corresponding path program 5 times [2024-06-14 12:16:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:56,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176448337] [2024-06-14 12:16:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:56,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:57,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:57,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176448337] [2024-06-14 12:16:57,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176448337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:57,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:57,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:57,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797429982] [2024-06-14 12:16:57,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:57,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:57,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:57,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:57,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:57,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 308 transitions, 3430 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:57,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:57,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:57,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:58,365 INFO L124 PetriNetUnfolderBase]: 2695/4248 cut-off events. [2024-06-14 12:16:58,366 INFO L125 PetriNetUnfolderBase]: For 469584/469591 co-relation queries the response was YES. [2024-06-14 12:16:58,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38286 conditions, 4248 events. 2695/4248 cut-off events. For 469584/469591 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23683 event pairs, 687 based on Foata normal form. 5/4245 useless extension candidates. Maximal degree in co-relation 38171. Up to 3915 conditions per place. [2024-06-14 12:16:58,410 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 34 changer transitions 0/324 dead transitions. [2024-06-14 12:16:58,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 324 transitions, 4148 flow [2024-06-14 12:16:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:16:58,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:16:58,413 INFO L175 Difference]: Start difference. First operand has 229 places, 308 transitions, 3430 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:16:58,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 324 transitions, 4148 flow [2024-06-14 12:16:59,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 324 transitions, 4040 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:59,067 INFO L231 Difference]: Finished difference. Result has 233 places, 311 transitions, 3472 flow [2024-06-14 12:16:59,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3472, PETRI_PLACES=233, PETRI_TRANSITIONS=311} [2024-06-14 12:16:59,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-14 12:16:59,067 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 311 transitions, 3472 flow [2024-06-14 12:16:59,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:59,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:59,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:16:59,068 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:59,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:59,068 INFO L85 PathProgramCache]: Analyzing trace with hash -794063143, now seen corresponding path program 6 times [2024-06-14 12:16:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:59,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441423734] [2024-06-14 12:16:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:59,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:00,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:00,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441423734] [2024-06-14 12:17:00,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441423734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:00,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:00,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:00,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202074488] [2024-06-14 12:17:00,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:00,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:00,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:00,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:00,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:00,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:17:00,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 311 transitions, 3472 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:00,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:00,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:17:00,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:01,041 INFO L124 PetriNetUnfolderBase]: 2709/4270 cut-off events. [2024-06-14 12:17:01,042 INFO L125 PetriNetUnfolderBase]: For 481467/481477 co-relation queries the response was YES. [2024-06-14 12:17:01,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38656 conditions, 4270 events. 2709/4270 cut-off events. For 481467/481477 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23793 event pairs, 706 based on Foata normal form. 11/4278 useless extension candidates. Maximal degree in co-relation 38539. Up to 3868 conditions per place. [2024-06-14 12:17:01,093 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 264 selfloop transitions, 52 changer transitions 0/335 dead transitions. [2024-06-14 12:17:01,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 335 transitions, 4628 flow [2024-06-14 12:17:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:17:01,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:17:01,095 INFO L175 Difference]: Start difference. First operand has 233 places, 311 transitions, 3472 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:17:01,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 335 transitions, 4628 flow [2024-06-14 12:17:01,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 335 transitions, 4500 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:01,814 INFO L231 Difference]: Finished difference. Result has 235 places, 318 transitions, 3626 flow [2024-06-14 12:17:01,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3626, PETRI_PLACES=235, PETRI_TRANSITIONS=318} [2024-06-14 12:17:01,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-14 12:17:01,815 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 318 transitions, 3626 flow [2024-06-14 12:17:01,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:01,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:01,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:01,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:17:01,816 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:01,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:01,816 INFO L85 PathProgramCache]: Analyzing trace with hash 972129290, now seen corresponding path program 1 times [2024-06-14 12:17:01,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:01,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094442499] [2024-06-14 12:17:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:01,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:03,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:03,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094442499] [2024-06-14 12:17:03,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094442499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:03,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:03,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:03,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001158090] [2024-06-14 12:17:03,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:03,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:03,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:03,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:03,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 318 transitions, 3626 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:03,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:03,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:03,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:03,917 INFO L124 PetriNetUnfolderBase]: 2818/4377 cut-off events. [2024-06-14 12:17:03,917 INFO L125 PetriNetUnfolderBase]: For 479630/479634 co-relation queries the response was YES. [2024-06-14 12:17:03,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39652 conditions, 4377 events. 2818/4377 cut-off events. For 479630/479634 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23851 event pairs, 723 based on Foata normal form. 3/4378 useless extension candidates. Maximal degree in co-relation 39534. Up to 4237 conditions per place. [2024-06-14 12:17:03,968 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 309 selfloop transitions, 18 changer transitions 0/331 dead transitions. [2024-06-14 12:17:03,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 331 transitions, 4394 flow [2024-06-14 12:17:03,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 12:17:03,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 12:17:03,970 INFO L175 Difference]: Start difference. First operand has 235 places, 318 transitions, 3626 flow. Second operand 8 states and 119 transitions. [2024-06-14 12:17:03,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 331 transitions, 4394 flow [2024-06-14 12:17:04,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 331 transitions, 4212 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:04,681 INFO L231 Difference]: Finished difference. Result has 238 places, 320 transitions, 3575 flow [2024-06-14 12:17:04,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3575, PETRI_PLACES=238, PETRI_TRANSITIONS=320} [2024-06-14 12:17:04,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-14 12:17:04,682 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 320 transitions, 3575 flow [2024-06-14 12:17:04,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:04,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:04,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:04,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:17:04,683 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:04,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1782753136, now seen corresponding path program 1 times [2024-06-14 12:17:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:04,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186510602] [2024-06-14 12:17:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:05,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:05,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186510602] [2024-06-14 12:17:05,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186510602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:05,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:05,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:05,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177826275] [2024-06-14 12:17:05,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:05,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:05,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:05,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:05,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:05,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 320 transitions, 3575 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:05,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:05,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:05,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:06,437 INFO L124 PetriNetUnfolderBase]: 2834/4403 cut-off events. [2024-06-14 12:17:06,437 INFO L125 PetriNetUnfolderBase]: For 495704/495716 co-relation queries the response was YES. [2024-06-14 12:17:06,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39504 conditions, 4403 events. 2834/4403 cut-off events. For 495704/495716 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24090 event pairs, 517 based on Foata normal form. 14/4414 useless extension candidates. Maximal degree in co-relation 39385. Up to 4069 conditions per place. [2024-06-14 12:17:06,490 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 38 changer transitions 0/351 dead transitions. [2024-06-14 12:17:06,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 351 transitions, 4462 flow [2024-06-14 12:17:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:06,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:06,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:17:06,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:17:06,492 INFO L175 Difference]: Start difference. First operand has 238 places, 320 transitions, 3575 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:17:06,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 351 transitions, 4462 flow [2024-06-14 12:17:07,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 351 transitions, 4349 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:07,797 INFO L231 Difference]: Finished difference. Result has 240 places, 323 transitions, 3650 flow [2024-06-14 12:17:07,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3462, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3650, PETRI_PLACES=240, PETRI_TRANSITIONS=323} [2024-06-14 12:17:07,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-14 12:17:07,798 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 323 transitions, 3650 flow [2024-06-14 12:17:07,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:07,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:07,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:07,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:17:07,799 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:07,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1774182256, now seen corresponding path program 2 times [2024-06-14 12:17:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:07,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160324336] [2024-06-14 12:17:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:08,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:08,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160324336] [2024-06-14 12:17:08,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160324336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:08,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:08,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:08,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296465302] [2024-06-14 12:17:08,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:08,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:08,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:08,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:08,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:08,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:08,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 323 transitions, 3650 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:08,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:08,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:08,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:09,690 INFO L124 PetriNetUnfolderBase]: 2850/4427 cut-off events. [2024-06-14 12:17:09,690 INFO L125 PetriNetUnfolderBase]: For 509646/509658 co-relation queries the response was YES. [2024-06-14 12:17:09,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40188 conditions, 4427 events. 2850/4427 cut-off events. For 509646/509658 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24319 event pairs, 671 based on Foata normal form. 14/4438 useless extension candidates. Maximal degree in co-relation 40068. Up to 4146 conditions per place. [2024-06-14 12:17:09,739 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 307 selfloop transitions, 39 changer transitions 0/350 dead transitions. [2024-06-14 12:17:09,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 350 transitions, 4529 flow [2024-06-14 12:17:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:17:09,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:17:09,740 INFO L175 Difference]: Start difference. First operand has 240 places, 323 transitions, 3650 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:17:09,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 350 transitions, 4529 flow [2024-06-14 12:17:10,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 350 transitions, 4363 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:10,528 INFO L231 Difference]: Finished difference. Result has 242 places, 326 transitions, 3680 flow [2024-06-14 12:17:10,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3680, PETRI_PLACES=242, PETRI_TRANSITIONS=326} [2024-06-14 12:17:10,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 12:17:10,529 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 326 transitions, 3680 flow [2024-06-14 12:17:10,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:10,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:10,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:10,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:17:10,530 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:10,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:10,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1774171344, now seen corresponding path program 1 times [2024-06-14 12:17:10,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:10,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175867970] [2024-06-14 12:17:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:10,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:11,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:11,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175867970] [2024-06-14 12:17:11,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175867970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:11,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:11,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:11,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39429888] [2024-06-14 12:17:11,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:11,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:11,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:11,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:11,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 326 transitions, 3680 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:11,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:11,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:11,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:12,492 INFO L124 PetriNetUnfolderBase]: 2870/4455 cut-off events. [2024-06-14 12:17:12,492 INFO L125 PetriNetUnfolderBase]: For 523029/523041 co-relation queries the response was YES. [2024-06-14 12:17:12,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40671 conditions, 4455 events. 2870/4455 cut-off events. For 523029/523041 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24407 event pairs, 670 based on Foata normal form. 14/4466 useless extension candidates. Maximal degree in co-relation 40550. Up to 4168 conditions per place. [2024-06-14 12:17:12,545 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 307 selfloop transitions, 44 changer transitions 0/355 dead transitions. [2024-06-14 12:17:12,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 355 transitions, 4601 flow [2024-06-14 12:17:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:17:12,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 12:17:12,547 INFO L175 Difference]: Start difference. First operand has 242 places, 326 transitions, 3680 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:17:12,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 355 transitions, 4601 flow [2024-06-14 12:17:13,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 355 transitions, 4427 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:13,187 INFO L231 Difference]: Finished difference. Result has 245 places, 330 transitions, 3727 flow [2024-06-14 12:17:13,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3727, PETRI_PLACES=245, PETRI_TRANSITIONS=330} [2024-06-14 12:17:13,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-14 12:17:13,187 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 330 transitions, 3727 flow [2024-06-14 12:17:13,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:13,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:13,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:13,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:17:13,188 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:13,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1664423284, now seen corresponding path program 1 times [2024-06-14 12:17:13,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:13,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147485948] [2024-06-14 12:17:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:13,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:13,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:13,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147485948] [2024-06-14 12:17:13,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147485948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:13,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:13,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:13,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662548624] [2024-06-14 12:17:13,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:13,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:13,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:13,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:13,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 330 transitions, 3727 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:13,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:13,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:13,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:14,933 INFO L124 PetriNetUnfolderBase]: 2890/4477 cut-off events. [2024-06-14 12:17:14,934 INFO L125 PetriNetUnfolderBase]: For 537098/537105 co-relation queries the response was YES. [2024-06-14 12:17:14,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41301 conditions, 4477 events. 2890/4477 cut-off events. For 537098/537105 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 24537 event pairs, 590 based on Foata normal form. 5/4478 useless extension candidates. Maximal degree in co-relation 41179. Up to 3896 conditions per place. [2024-06-14 12:17:14,990 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 280 selfloop transitions, 84 changer transitions 0/368 dead transitions. [2024-06-14 12:17:14,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 368 transitions, 4714 flow [2024-06-14 12:17:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:17:14,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 12:17:14,991 INFO L175 Difference]: Start difference. First operand has 245 places, 330 transitions, 3727 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:17:14,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 368 transitions, 4714 flow [2024-06-14 12:17:15,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 368 transitions, 4527 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:15,863 INFO L231 Difference]: Finished difference. Result has 247 places, 343 transitions, 3915 flow [2024-06-14 12:17:15,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3915, PETRI_PLACES=247, PETRI_TRANSITIONS=343} [2024-06-14 12:17:15,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-14 12:17:15,866 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 343 transitions, 3915 flow [2024-06-14 12:17:15,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:15,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:15,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:15,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:17:15,867 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:15,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:15,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1664303314, now seen corresponding path program 2 times [2024-06-14 12:17:15,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:15,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427282813] [2024-06-14 12:17:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:15,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:16,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:16,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427282813] [2024-06-14 12:17:16,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427282813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:16,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:16,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:16,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447751575] [2024-06-14 12:17:16,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:16,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:16,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:16,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:16,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:16,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 343 transitions, 3915 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:16,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:16,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:16,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:17,729 INFO L124 PetriNetUnfolderBase]: 2926/4528 cut-off events. [2024-06-14 12:17:17,729 INFO L125 PetriNetUnfolderBase]: For 560944/560951 co-relation queries the response was YES. [2024-06-14 12:17:17,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43022 conditions, 4528 events. 2926/4528 cut-off events. For 560944/560951 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24790 event pairs, 607 based on Foata normal form. 5/4529 useless extension candidates. Maximal degree in co-relation 42898. Up to 3904 conditions per place. [2024-06-14 12:17:17,789 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 93 changer transitions 0/374 dead transitions. [2024-06-14 12:17:17,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 374 transitions, 5111 flow [2024-06-14 12:17:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:17:17,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:17:17,791 INFO L175 Difference]: Start difference. First operand has 247 places, 343 transitions, 3915 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:17:17,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 374 transitions, 5111 flow [2024-06-14 12:17:18,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 374 transitions, 4889 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:18,612 INFO L231 Difference]: Finished difference. Result has 251 places, 351 transitions, 4118 flow [2024-06-14 12:17:18,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3693, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4118, PETRI_PLACES=251, PETRI_TRANSITIONS=351} [2024-06-14 12:17:18,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-14 12:17:18,613 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 351 transitions, 4118 flow [2024-06-14 12:17:18,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:18,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:18,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:18,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:17:18,614 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:18,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:18,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1664303128, now seen corresponding path program 1 times [2024-06-14 12:17:18,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:18,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840640209] [2024-06-14 12:17:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:18,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:19,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:19,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840640209] [2024-06-14 12:17:19,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840640209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:19,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:19,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540652269] [2024-06-14 12:17:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:19,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:19,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:19,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:19,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 351 transitions, 4118 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:19,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:19,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:19,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:20,531 INFO L124 PetriNetUnfolderBase]: 2936/4542 cut-off events. [2024-06-14 12:17:20,531 INFO L125 PetriNetUnfolderBase]: For 573288/573298 co-relation queries the response was YES. [2024-06-14 12:17:20,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43644 conditions, 4542 events. 2936/4542 cut-off events. For 573288/573298 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24895 event pairs, 606 based on Foata normal form. 7/4546 useless extension candidates. Maximal degree in co-relation 43519. Up to 4268 conditions per place. [2024-06-14 12:17:20,593 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 40 changer transitions 0/375 dead transitions. [2024-06-14 12:17:20,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 375 transitions, 4998 flow [2024-06-14 12:17:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:17:20,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:17:20,594 INFO L175 Difference]: Start difference. First operand has 251 places, 351 transitions, 4118 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:17:20,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 375 transitions, 4998 flow [2024-06-14 12:17:21,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 375 transitions, 4772 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:21,781 INFO L231 Difference]: Finished difference. Result has 255 places, 355 transitions, 4061 flow [2024-06-14 12:17:21,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3892, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4061, PETRI_PLACES=255, PETRI_TRANSITIONS=355} [2024-06-14 12:17:21,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-14 12:17:21,782 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 355 transitions, 4061 flow [2024-06-14 12:17:21,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:21,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:21,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:21,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:17:21,783 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:21,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:21,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1487171794, now seen corresponding path program 3 times [2024-06-14 12:17:21,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:21,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352088472] [2024-06-14 12:17:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:21,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:22,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:22,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352088472] [2024-06-14 12:17:22,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352088472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:22,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:22,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:22,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828999085] [2024-06-14 12:17:22,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:22,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:22,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:22,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:22,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 355 transitions, 4061 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:22,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:22,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:22,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:23,770 INFO L124 PetriNetUnfolderBase]: 2988/4623 cut-off events. [2024-06-14 12:17:23,770 INFO L125 PetriNetUnfolderBase]: For 604279/604286 co-relation queries the response was YES. [2024-06-14 12:17:23,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44822 conditions, 4623 events. 2988/4623 cut-off events. For 604279/604286 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25346 event pairs, 618 based on Foata normal form. 5/4624 useless extension candidates. Maximal degree in co-relation 44695. Up to 3859 conditions per place. [2024-06-14 12:17:24,024 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 98 changer transitions 0/382 dead transitions. [2024-06-14 12:17:24,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 382 transitions, 5277 flow [2024-06-14 12:17:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:17:24,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:17:24,026 INFO L175 Difference]: Start difference. First operand has 255 places, 355 transitions, 4061 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:17:24,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 382 transitions, 5277 flow [2024-06-14 12:17:25,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 382 transitions, 5158 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:25,109 INFO L231 Difference]: Finished difference. Result has 257 places, 362 transitions, 4353 flow [2024-06-14 12:17:25,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3942, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4353, PETRI_PLACES=257, PETRI_TRANSITIONS=362} [2024-06-14 12:17:25,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-14 12:17:25,110 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 362 transitions, 4353 flow [2024-06-14 12:17:25,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:25,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:25,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:25,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:17:25,110 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:25,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash -133494272, now seen corresponding path program 2 times [2024-06-14 12:17:25,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:25,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050856044] [2024-06-14 12:17:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:25,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:26,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050856044] [2024-06-14 12:17:26,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050856044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:26,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:26,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:26,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868061584] [2024-06-14 12:17:26,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:26,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:26,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:26,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:26,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:26,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 362 transitions, 4353 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:26,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:26,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:26,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:27,148 INFO L124 PetriNetUnfolderBase]: 2998/4631 cut-off events. [2024-06-14 12:17:27,148 INFO L125 PetriNetUnfolderBase]: For 618026/618036 co-relation queries the response was YES. [2024-06-14 12:17:27,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45846 conditions, 4631 events. 2998/4631 cut-off events. For 618026/618036 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25377 event pairs, 613 based on Foata normal form. 7/4635 useless extension candidates. Maximal degree in co-relation 45718. Up to 4316 conditions per place. [2024-06-14 12:17:27,207 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 49 changer transitions 0/382 dead transitions. [2024-06-14 12:17:27,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 382 transitions, 5239 flow [2024-06-14 12:17:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:17:27,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:17:27,208 INFO L175 Difference]: Start difference. First operand has 257 places, 362 transitions, 4353 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:17:27,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 382 transitions, 5239 flow [2024-06-14 12:17:28,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 382 transitions, 5032 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:28,262 INFO L231 Difference]: Finished difference. Result has 261 places, 366 transitions, 4341 flow [2024-06-14 12:17:28,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4341, PETRI_PLACES=261, PETRI_TRANSITIONS=366} [2024-06-14 12:17:28,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-14 12:17:28,263 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 366 transitions, 4341 flow [2024-06-14 12:17:28,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:28,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:28,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:28,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:17:28,263 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:28,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1659654988, now seen corresponding path program 3 times [2024-06-14 12:17:28,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:28,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134236325] [2024-06-14 12:17:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:28,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:29,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:29,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134236325] [2024-06-14 12:17:29,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134236325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:29,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:29,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:29,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170191571] [2024-06-14 12:17:29,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:29,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:29,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:29,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:29,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:29,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:29,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 366 transitions, 4341 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:29,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:29,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:29,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:30,279 INFO L124 PetriNetUnfolderBase]: 3000/4634 cut-off events. [2024-06-14 12:17:30,279 INFO L125 PetriNetUnfolderBase]: For 626013/626023 co-relation queries the response was YES. [2024-06-14 12:17:30,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45853 conditions, 4634 events. 3000/4634 cut-off events. For 626013/626023 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25403 event pairs, 589 based on Foata normal form. 7/4638 useless extension candidates. Maximal degree in co-relation 45723. Up to 4271 conditions per place. [2024-06-14 12:17:30,339 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 67 changer transitions 0/386 dead transitions. [2024-06-14 12:17:30,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 386 transitions, 5389 flow [2024-06-14 12:17:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:17:30,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:17:30,342 INFO L175 Difference]: Start difference. First operand has 261 places, 366 transitions, 4341 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:17:30,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 386 transitions, 5389 flow [2024-06-14 12:17:31,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 386 transitions, 5244 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:31,699 INFO L231 Difference]: Finished difference. Result has 263 places, 369 transitions, 4414 flow [2024-06-14 12:17:31,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4196, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4414, PETRI_PLACES=263, PETRI_TRANSITIONS=369} [2024-06-14 12:17:31,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-14 12:17:31,700 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 369 transitions, 4414 flow [2024-06-14 12:17:31,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:31,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:31,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:31,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:17:31,701 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:31,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:31,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1487294926, now seen corresponding path program 3 times [2024-06-14 12:17:31,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:31,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233081308] [2024-06-14 12:17:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:31,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:32,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:32,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233081308] [2024-06-14 12:17:32,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233081308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:32,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:32,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:32,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482781897] [2024-06-14 12:17:32,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:32,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:32,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:32,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:32,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:32,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 369 transitions, 4414 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:32,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:32,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:32,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:33,654 INFO L124 PetriNetUnfolderBase]: 3016/4658 cut-off events. [2024-06-14 12:17:33,654 INFO L125 PetriNetUnfolderBase]: For 649420/649430 co-relation queries the response was YES. [2024-06-14 12:17:33,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46373 conditions, 4658 events. 3016/4658 cut-off events. For 649420/649430 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25540 event pairs, 589 based on Foata normal form. 9/4664 useless extension candidates. Maximal degree in co-relation 46242. Up to 4337 conditions per place. [2024-06-14 12:17:33,721 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 336 selfloop transitions, 49 changer transitions 0/389 dead transitions. [2024-06-14 12:17:33,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 389 transitions, 5356 flow [2024-06-14 12:17:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:17:33,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:17:33,722 INFO L175 Difference]: Start difference. First operand has 263 places, 369 transitions, 4414 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:17:33,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 389 transitions, 5356 flow [2024-06-14 12:17:35,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 389 transitions, 5199 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:35,109 INFO L231 Difference]: Finished difference. Result has 266 places, 372 transitions, 4489 flow [2024-06-14 12:17:35,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4257, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4489, PETRI_PLACES=266, PETRI_TRANSITIONS=372} [2024-06-14 12:17:35,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 12:17:35,109 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 372 transitions, 4489 flow [2024-06-14 12:17:35,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:35,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:35,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:35,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:17:35,111 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:35,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:35,111 INFO L85 PathProgramCache]: Analyzing trace with hash -750458844, now seen corresponding path program 2 times [2024-06-14 12:17:35,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:35,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751297545] [2024-06-14 12:17:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:35,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:36,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751297545] [2024-06-14 12:17:36,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751297545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:36,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:36,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970307447] [2024-06-14 12:17:36,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:36,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:36,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:36,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:36,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 372 transitions, 4489 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:36,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:36,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:36,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:37,434 INFO L124 PetriNetUnfolderBase]: 3026/4672 cut-off events. [2024-06-14 12:17:37,435 INFO L125 PetriNetUnfolderBase]: For 659220/659230 co-relation queries the response was YES. [2024-06-14 12:17:37,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46840 conditions, 4672 events. 3026/4672 cut-off events. For 659220/659230 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 25647 event pairs, 591 based on Foata normal form. 7/4676 useless extension candidates. Maximal degree in co-relation 46708. Up to 4351 conditions per place. [2024-06-14 12:17:37,494 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 335 selfloop transitions, 54 changer transitions 0/393 dead transitions. [2024-06-14 12:17:37,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 393 transitions, 5457 flow [2024-06-14 12:17:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:17:37,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:17:37,495 INFO L175 Difference]: Start difference. First operand has 266 places, 372 transitions, 4489 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:17:37,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 393 transitions, 5457 flow [2024-06-14 12:17:38,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 393 transitions, 5247 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:38,733 INFO L231 Difference]: Finished difference. Result has 269 places, 376 transitions, 4542 flow [2024-06-14 12:17:38,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4279, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4542, PETRI_PLACES=269, PETRI_TRANSITIONS=376} [2024-06-14 12:17:38,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-14 12:17:38,743 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 376 transitions, 4542 flow [2024-06-14 12:17:38,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:38,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:38,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:38,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:17:38,744 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:38,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:38,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1486938054, now seen corresponding path program 3 times [2024-06-14 12:17:38,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:38,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902265310] [2024-06-14 12:17:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:38,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:39,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:39,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902265310] [2024-06-14 12:17:39,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902265310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:39,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:39,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:39,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763708170] [2024-06-14 12:17:39,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:39,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:39,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:39,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:39,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 376 transitions, 4542 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:39,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:39,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:39,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:40,850 INFO L124 PetriNetUnfolderBase]: 3122/4820 cut-off events. [2024-06-14 12:17:40,850 INFO L125 PetriNetUnfolderBase]: For 716814/716824 co-relation queries the response was YES. [2024-06-14 12:17:40,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49807 conditions, 4820 events. 3122/4820 cut-off events. For 716814/716824 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26579 event pairs, 591 based on Foata normal form. 9/4826 useless extension candidates. Maximal degree in co-relation 49674. Up to 4319 conditions per place. [2024-06-14 12:17:40,917 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 326 selfloop transitions, 81 changer transitions 0/411 dead transitions. [2024-06-14 12:17:40,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 411 transitions, 6280 flow [2024-06-14 12:17:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:17:40,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:17:40,922 INFO L175 Difference]: Start difference. First operand has 269 places, 376 transitions, 4542 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:17:40,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 411 transitions, 6280 flow [2024-06-14 12:17:42,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 411 transitions, 6045 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:42,182 INFO L231 Difference]: Finished difference. Result has 273 places, 388 transitions, 4949 flow [2024-06-14 12:17:42,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4307, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4949, PETRI_PLACES=273, PETRI_TRANSITIONS=388} [2024-06-14 12:17:42,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-14 12:17:42,184 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 388 transitions, 4949 flow [2024-06-14 12:17:42,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:42,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:42,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:42,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:17:42,184 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:42,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1486925530, now seen corresponding path program 1 times [2024-06-14 12:17:42,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:42,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235061947] [2024-06-14 12:17:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:42,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:43,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:43,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235061947] [2024-06-14 12:17:43,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235061947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:43,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:43,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:43,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773514827] [2024-06-14 12:17:43,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:43,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:43,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:43,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:43,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:43,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:43,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 388 transitions, 4949 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:43,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:43,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:43,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:44,573 INFO L124 PetriNetUnfolderBase]: 3119/4819 cut-off events. [2024-06-14 12:17:44,573 INFO L125 PetriNetUnfolderBase]: For 725505/725511 co-relation queries the response was YES. [2024-06-14 12:17:44,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50540 conditions, 4819 events. 3119/4819 cut-off events. For 725505/725511 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26598 event pairs, 617 based on Foata normal form. 7/4824 useless extension candidates. Maximal degree in co-relation 50404. Up to 4645 conditions per place. [2024-06-14 12:17:44,637 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 21 changer transitions 0/405 dead transitions. [2024-06-14 12:17:44,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 405 transitions, 5808 flow [2024-06-14 12:17:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:17:44,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 12:17:44,639 INFO L175 Difference]: Start difference. First operand has 273 places, 388 transitions, 4949 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:17:44,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 405 transitions, 5808 flow [2024-06-14 12:17:45,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 405 transitions, 5511 flow, removed 122 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:45,769 INFO L231 Difference]: Finished difference. Result has 277 places, 388 transitions, 4702 flow [2024-06-14 12:17:45,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4702, PETRI_PLACES=277, PETRI_TRANSITIONS=388} [2024-06-14 12:17:45,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-14 12:17:45,769 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 388 transitions, 4702 flow [2024-06-14 12:17:45,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:45,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:45,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:45,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:17:45,770 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:45,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1486925964, now seen corresponding path program 4 times [2024-06-14 12:17:45,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:45,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040326910] [2024-06-14 12:17:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:45,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:46,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:46,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040326910] [2024-06-14 12:17:46,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040326910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:46,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:46,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:46,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580809825] [2024-06-14 12:17:46,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:46,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:46,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:46,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:46,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 388 transitions, 4702 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:46,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:46,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:46,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:48,143 INFO L124 PetriNetUnfolderBase]: 3111/4803 cut-off events. [2024-06-14 12:17:48,143 INFO L125 PetriNetUnfolderBase]: For 727215/727225 co-relation queries the response was YES. [2024-06-14 12:17:48,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49503 conditions, 4803 events. 3111/4803 cut-off events. For 727215/727225 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26470 event pairs, 597 based on Foata normal form. 9/4809 useless extension candidates. Maximal degree in co-relation 49365. Up to 4315 conditions per place. [2024-06-14 12:17:48,211 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 325 selfloop transitions, 81 changer transitions 0/410 dead transitions. [2024-06-14 12:17:48,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 410 transitions, 6020 flow [2024-06-14 12:17:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:17:48,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 12:17:48,213 INFO L175 Difference]: Start difference. First operand has 277 places, 388 transitions, 4702 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:17:48,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 410 transitions, 6020 flow [2024-06-14 12:17:49,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 410 transitions, 5856 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:49,546 INFO L231 Difference]: Finished difference. Result has 279 places, 388 transitions, 4709 flow [2024-06-14 12:17:49,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4538, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4709, PETRI_PLACES=279, PETRI_TRANSITIONS=388} [2024-06-14 12:17:49,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-14 12:17:49,547 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 388 transitions, 4709 flow [2024-06-14 12:17:49,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:49,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:49,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:49,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:17:49,548 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:49,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1636445836, now seen corresponding path program 4 times [2024-06-14 12:17:49,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:49,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954699374] [2024-06-14 12:17:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:49,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:50,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:50,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954699374] [2024-06-14 12:17:50,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954699374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:50,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:50,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:50,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608260834] [2024-06-14 12:17:50,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:50,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:50,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:50,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:50,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:50,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:50,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 388 transitions, 4709 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:50,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:50,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:50,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:51,384 INFO L124 PetriNetUnfolderBase]: 3121/4806 cut-off events. [2024-06-14 12:17:51,385 INFO L125 PetriNetUnfolderBase]: For 737771/737779 co-relation queries the response was YES. [2024-06-14 12:17:51,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49922 conditions, 4806 events. 3121/4806 cut-off events. For 737771/737779 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26416 event pairs, 616 based on Foata normal form. 4/4790 useless extension candidates. Maximal degree in co-relation 49783. Up to 4232 conditions per place. [2024-06-14 12:17:51,455 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 326 selfloop transitions, 88 changer transitions 0/418 dead transitions. [2024-06-14 12:17:51,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 418 transitions, 5743 flow [2024-06-14 12:17:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:17:51,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:17:51,456 INFO L175 Difference]: Start difference. First operand has 279 places, 388 transitions, 4709 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:17:51,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 418 transitions, 5743 flow [2024-06-14 12:17:52,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 418 transitions, 5554 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:17:52,934 INFO L231 Difference]: Finished difference. Result has 280 places, 395 transitions, 4838 flow [2024-06-14 12:17:52,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4838, PETRI_PLACES=280, PETRI_TRANSITIONS=395} [2024-06-14 12:17:52,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-14 12:17:52,935 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 395 transitions, 4838 flow [2024-06-14 12:17:52,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:52,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:52,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:52,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:17:52,936 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:52,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:52,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1055362862, now seen corresponding path program 5 times [2024-06-14 12:17:52,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:52,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216104833] [2024-06-14 12:17:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:52,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:53,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:53,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216104833] [2024-06-14 12:17:53,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216104833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:53,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:53,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:53,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750309310] [2024-06-14 12:17:53,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:53,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:53,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:53,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:53,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:53,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:53,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 395 transitions, 4838 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:53,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:53,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:53,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:54,873 INFO L124 PetriNetUnfolderBase]: 3131/4821 cut-off events. [2024-06-14 12:17:54,873 INFO L125 PetriNetUnfolderBase]: For 756744/756752 co-relation queries the response was YES. [2024-06-14 12:17:54,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50688 conditions, 4821 events. 3131/4821 cut-off events. For 756744/756752 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 26468 event pairs, 622 based on Foata normal form. 4/4805 useless extension candidates. Maximal degree in co-relation 50548. Up to 4216 conditions per place. [2024-06-14 12:17:54,935 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 95 changer transitions 0/423 dead transitions. [2024-06-14 12:17:54,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 423 transitions, 6132 flow [2024-06-14 12:17:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:17:54,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:17:54,936 INFO L175 Difference]: Start difference. First operand has 280 places, 395 transitions, 4838 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:17:54,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 423 transitions, 6132 flow [2024-06-14 12:17:56,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 423 transitions, 5900 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:56,445 INFO L231 Difference]: Finished difference. Result has 284 places, 401 transitions, 5000 flow [2024-06-14 12:17:56,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5000, PETRI_PLACES=284, PETRI_TRANSITIONS=401} [2024-06-14 12:17:56,446 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-14 12:17:56,446 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 401 transitions, 5000 flow [2024-06-14 12:17:56,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:56,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:56,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:56,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:17:56,447 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:56,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1055363048, now seen corresponding path program 4 times [2024-06-14 12:17:56,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:56,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447107353] [2024-06-14 12:17:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:56,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:57,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:57,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447107353] [2024-06-14 12:17:57,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447107353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:57,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:57,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:57,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560477853] [2024-06-14 12:17:57,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:57,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:57,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:57,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:57,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:57,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:57,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 401 transitions, 5000 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:57,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:57,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:57,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:58,425 INFO L124 PetriNetUnfolderBase]: 3122/4812 cut-off events. [2024-06-14 12:17:58,425 INFO L125 PetriNetUnfolderBase]: For 764947/764955 co-relation queries the response was YES. [2024-06-14 12:17:58,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50676 conditions, 4812 events. 3122/4812 cut-off events. For 764947/764955 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26461 event pairs, 622 based on Foata normal form. 3/4805 useless extension candidates. Maximal degree in co-relation 50535. Up to 4541 conditions per place. [2024-06-14 12:17:58,489 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 39 changer transitions 0/419 dead transitions. [2024-06-14 12:17:58,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 419 transitions, 5890 flow [2024-06-14 12:17:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:17:58,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-14 12:17:58,490 INFO L175 Difference]: Start difference. First operand has 284 places, 401 transitions, 5000 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:17:58,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 419 transitions, 5890 flow [2024-06-14 12:17:59,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 419 transitions, 5660 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:59,962 INFO L231 Difference]: Finished difference. Result has 288 places, 401 transitions, 4854 flow [2024-06-14 12:17:59,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4854, PETRI_PLACES=288, PETRI_TRANSITIONS=401} [2024-06-14 12:17:59,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-14 12:17:59,963 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 401 transitions, 4854 flow [2024-06-14 12:17:59,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:17:59,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:59,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:59,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:17:59,963 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:59,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:59,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1283144042, now seen corresponding path program 6 times [2024-06-14 12:17:59,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:59,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98730969] [2024-06-14 12:17:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:59,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:00,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:00,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98730969] [2024-06-14 12:18:00,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98730969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:00,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:00,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:00,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419754287] [2024-06-14 12:18:00,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:00,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:00,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:00,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:00,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:00,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:00,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 401 transitions, 4854 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:00,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:00,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:00,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:01,972 INFO L124 PetriNetUnfolderBase]: 3124/4809 cut-off events. [2024-06-14 12:18:01,972 INFO L125 PetriNetUnfolderBase]: For 777958/777966 co-relation queries the response was YES. [2024-06-14 12:18:02,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50645 conditions, 4809 events. 3124/4809 cut-off events. For 777958/777966 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26420 event pairs, 610 based on Foata normal form. 4/4793 useless extension candidates. Maximal degree in co-relation 50502. Up to 4236 conditions per place. [2024-06-14 12:18:02,036 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 332 selfloop transitions, 95 changer transitions 0/431 dead transitions. [2024-06-14 12:18:02,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 431 transitions, 5915 flow [2024-06-14 12:18:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:02,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:18:02,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:18:02,037 INFO L175 Difference]: Start difference. First operand has 288 places, 401 transitions, 4854 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:18:02,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 431 transitions, 5915 flow [2024-06-14 12:18:03,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 431 transitions, 5752 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 12:18:03,694 INFO L231 Difference]: Finished difference. Result has 289 places, 408 transitions, 5022 flow [2024-06-14 12:18:03,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4691, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5022, PETRI_PLACES=289, PETRI_TRANSITIONS=408} [2024-06-14 12:18:03,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-14 12:18:03,695 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 408 transitions, 5022 flow [2024-06-14 12:18:03,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:03,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:03,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:03,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:18:03,696 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:03,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1294571882, now seen corresponding path program 7 times [2024-06-14 12:18:03,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:03,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156593923] [2024-06-14 12:18:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:03,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:04,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:04,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156593923] [2024-06-14 12:18:04,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156593923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:04,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:04,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:04,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632119431] [2024-06-14 12:18:04,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:04,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:04,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:04,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:04,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 408 transitions, 5022 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:04,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:04,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:04,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:05,728 INFO L124 PetriNetUnfolderBase]: 3134/4827 cut-off events. [2024-06-14 12:18:05,728 INFO L125 PetriNetUnfolderBase]: For 796548/796556 co-relation queries the response was YES. [2024-06-14 12:18:05,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51577 conditions, 4827 events. 3134/4827 cut-off events. For 796548/796556 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 26596 event pairs, 604 based on Foata normal form. 4/4809 useless extension candidates. Maximal degree in co-relation 51432. Up to 4208 conditions per place. [2024-06-14 12:18:05,795 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 321 selfloop transitions, 107 changer transitions 0/432 dead transitions. [2024-06-14 12:18:05,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 432 transitions, 6074 flow [2024-06-14 12:18:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:18:05,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:18:05,797 INFO L175 Difference]: Start difference. First operand has 289 places, 408 transitions, 5022 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:18:05,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 432 transitions, 6074 flow [2024-06-14 12:18:07,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 432 transitions, 5870 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:07,644 INFO L231 Difference]: Finished difference. Result has 293 places, 411 transitions, 5152 flow [2024-06-14 12:18:07,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5152, PETRI_PLACES=293, PETRI_TRANSITIONS=411} [2024-06-14 12:18:07,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-14 12:18:07,645 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 411 transitions, 5152 flow [2024-06-14 12:18:07,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:07,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:07,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:07,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:18:07,646 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:07,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:07,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1409863052, now seen corresponding path program 8 times [2024-06-14 12:18:07,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:07,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056447995] [2024-06-14 12:18:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:07,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:08,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:08,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056447995] [2024-06-14 12:18:08,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056447995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:08,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:08,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:08,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251883920] [2024-06-14 12:18:08,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:08,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:08,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:08,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:08,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:08,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:08,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 411 transitions, 5152 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:08,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:08,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:08,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:09,794 INFO L124 PetriNetUnfolderBase]: 3168/4869 cut-off events. [2024-06-14 12:18:09,794 INFO L125 PetriNetUnfolderBase]: For 832101/832109 co-relation queries the response was YES. [2024-06-14 12:18:09,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53075 conditions, 4869 events. 3168/4869 cut-off events. For 832101/832109 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26782 event pairs, 618 based on Foata normal form. 4/4853 useless extension candidates. Maximal degree in co-relation 52929. Up to 4156 conditions per place. [2024-06-14 12:18:09,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 298 selfloop transitions, 138 changer transitions 0/440 dead transitions. [2024-06-14 12:18:09,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 440 transitions, 6820 flow [2024-06-14 12:18:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:18:09,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:18:09,859 INFO L175 Difference]: Start difference. First operand has 293 places, 411 transitions, 5152 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:18:09,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 440 transitions, 6820 flow [2024-06-14 12:18:11,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 440 transitions, 6508 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:11,562 INFO L231 Difference]: Finished difference. Result has 295 places, 420 transitions, 5470 flow [2024-06-14 12:18:11,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4840, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5470, PETRI_PLACES=295, PETRI_TRANSITIONS=420} [2024-06-14 12:18:11,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-14 12:18:11,562 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 420 transitions, 5470 flow [2024-06-14 12:18:11,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:11,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:11,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:11,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:18:11,563 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:11,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:11,563 INFO L85 PathProgramCache]: Analyzing trace with hash 734729648, now seen corresponding path program 5 times [2024-06-14 12:18:11,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:11,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431687477] [2024-06-14 12:18:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:11,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:12,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:12,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431687477] [2024-06-14 12:18:12,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431687477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:12,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:12,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:12,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211488646] [2024-06-14 12:18:12,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:12,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:12,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:12,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:12,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:12,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 420 transitions, 5470 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:12,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:12,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:12,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:13,781 INFO L124 PetriNetUnfolderBase]: 3181/4899 cut-off events. [2024-06-14 12:18:13,781 INFO L125 PetriNetUnfolderBase]: For 852786/852794 co-relation queries the response was YES. [2024-06-14 12:18:13,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53744 conditions, 4899 events. 3181/4899 cut-off events. For 852786/852794 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 26998 event pairs, 607 based on Foata normal form. 3/4892 useless extension candidates. Maximal degree in co-relation 53597. Up to 4587 conditions per place. [2024-06-14 12:18:13,849 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 379 selfloop transitions, 60 changer transitions 0/443 dead transitions. [2024-06-14 12:18:13,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 443 transitions, 6735 flow [2024-06-14 12:18:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:18:13,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:18:13,850 INFO L175 Difference]: Start difference. First operand has 295 places, 420 transitions, 5470 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:18:13,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 443 transitions, 6735 flow [2024-06-14 12:18:15,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 443 transitions, 6489 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-14 12:18:15,712 INFO L231 Difference]: Finished difference. Result has 301 places, 427 transitions, 5532 flow [2024-06-14 12:18:15,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5224, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5532, PETRI_PLACES=301, PETRI_TRANSITIONS=427} [2024-06-14 12:18:15,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-14 12:18:15,713 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 427 transitions, 5532 flow [2024-06-14 12:18:15,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:15,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:15,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:15,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:18:15,713 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:15,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:15,714 INFO L85 PathProgramCache]: Analyzing trace with hash -661259132, now seen corresponding path program 6 times [2024-06-14 12:18:15,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:15,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793279851] [2024-06-14 12:18:15,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:15,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:16,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:16,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793279851] [2024-06-14 12:18:16,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793279851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:16,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:16,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561912698] [2024-06-14 12:18:16,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:16,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:16,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:16,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:16,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 427 transitions, 5532 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:16,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:16,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:16,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:17,875 INFO L124 PetriNetUnfolderBase]: 3178/4887 cut-off events. [2024-06-14 12:18:17,875 INFO L125 PetriNetUnfolderBase]: For 861822/861830 co-relation queries the response was YES. [2024-06-14 12:18:17,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53709 conditions, 4887 events. 3178/4887 cut-off events. For 861822/861830 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26885 event pairs, 617 based on Foata normal form. 3/4880 useless extension candidates. Maximal degree in co-relation 53559. Up to 4599 conditions per place. [2024-06-14 12:18:17,947 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 390 selfloop transitions, 48 changer transitions 0/442 dead transitions. [2024-06-14 12:18:17,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 442 transitions, 6456 flow [2024-06-14 12:18:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:18:17,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:18:17,948 INFO L175 Difference]: Start difference. First operand has 301 places, 427 transitions, 5532 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:18:17,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 442 transitions, 6456 flow [2024-06-14 12:18:20,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 442 transitions, 6253 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:20,422 INFO L231 Difference]: Finished difference. Result has 304 places, 427 transitions, 5431 flow [2024-06-14 12:18:20,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5431, PETRI_PLACES=304, PETRI_TRANSITIONS=427} [2024-06-14 12:18:20,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-14 12:18:20,423 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 427 transitions, 5431 flow [2024-06-14 12:18:20,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:20,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:20,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:20,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:18:20,424 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:20,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2049063412, now seen corresponding path program 9 times [2024-06-14 12:18:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500015721] [2024-06-14 12:18:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:20,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:21,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:21,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500015721] [2024-06-14 12:18:21,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500015721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:21,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:21,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:21,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492416220] [2024-06-14 12:18:21,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:21,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:21,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:21,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:21,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:21,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 427 transitions, 5431 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:21,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:21,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:21,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:22,440 INFO L124 PetriNetUnfolderBase]: 3172/4867 cut-off events. [2024-06-14 12:18:22,441 INFO L125 PetriNetUnfolderBase]: For 874019/874027 co-relation queries the response was YES. [2024-06-14 12:18:22,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53478 conditions, 4867 events. 3172/4867 cut-off events. For 874019/874027 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26672 event pairs, 612 based on Foata normal form. 4/4854 useless extension candidates. Maximal degree in co-relation 53327. Up to 4165 conditions per place. [2024-06-14 12:18:22,507 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 305 selfloop transitions, 138 changer transitions 0/447 dead transitions. [2024-06-14 12:18:22,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 447 transitions, 6783 flow [2024-06-14 12:18:22,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:18:22,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:18:22,508 INFO L175 Difference]: Start difference. First operand has 304 places, 427 transitions, 5431 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:18:22,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 447 transitions, 6783 flow [2024-06-14 12:18:24,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 447 transitions, 6623 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:24,695 INFO L231 Difference]: Finished difference. Result has 306 places, 427 transitions, 5553 flow [2024-06-14 12:18:24,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5553, PETRI_PLACES=306, PETRI_TRANSITIONS=427} [2024-06-14 12:18:24,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-14 12:18:24,695 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 427 transitions, 5553 flow [2024-06-14 12:18:24,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:24,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:24,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:24,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:18:24,696 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:24,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash -342569402, now seen corresponding path program 7 times [2024-06-14 12:18:24,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:24,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107694849] [2024-06-14 12:18:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:24,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:25,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:25,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107694849] [2024-06-14 12:18:25,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107694849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:25,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:25,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:25,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23050694] [2024-06-14 12:18:25,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:25,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:25,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:25,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:25,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:25,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:25,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 427 transitions, 5553 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:25,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:25,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:25,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:26,894 INFO L124 PetriNetUnfolderBase]: 3182/4898 cut-off events. [2024-06-14 12:18:26,895 INFO L125 PetriNetUnfolderBase]: For 891067/891081 co-relation queries the response was YES. [2024-06-14 12:18:26,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54112 conditions, 4898 events. 3182/4898 cut-off events. For 891067/891081 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 26989 event pairs, 638 based on Foata normal form. 8/4894 useless extension candidates. Maximal degree in co-relation 53960. Up to 4506 conditions per place. [2024-06-14 12:18:26,966 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 362 selfloop transitions, 77 changer transitions 0/443 dead transitions. [2024-06-14 12:18:26,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 443 transitions, 6747 flow [2024-06-14 12:18:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:18:26,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 12:18:26,967 INFO L175 Difference]: Start difference. First operand has 306 places, 427 transitions, 5553 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:18:26,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 443 transitions, 6747 flow [2024-06-14 12:18:29,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 443 transitions, 6432 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:29,151 INFO L231 Difference]: Finished difference. Result has 308 places, 431 transitions, 5493 flow [2024-06-14 12:18:29,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5238, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=308, PETRI_TRANSITIONS=431} [2024-06-14 12:18:29,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-14 12:18:29,172 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 431 transitions, 5493 flow [2024-06-14 12:18:29,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:29,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:29,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:29,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:18:29,173 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:29,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:29,173 INFO L85 PathProgramCache]: Analyzing trace with hash -502049088, now seen corresponding path program 8 times [2024-06-14 12:18:29,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:29,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132543338] [2024-06-14 12:18:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:29,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:30,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:30,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132543338] [2024-06-14 12:18:30,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132543338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:30,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:30,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:30,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209427532] [2024-06-14 12:18:30,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:30,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:30,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:30,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:30,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:30,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:30,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 431 transitions, 5493 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:30,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:30,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:30,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:31,265 INFO L124 PetriNetUnfolderBase]: 3184/4897 cut-off events. [2024-06-14 12:18:31,265 INFO L125 PetriNetUnfolderBase]: For 903098/903112 co-relation queries the response was YES. [2024-06-14 12:18:31,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53887 conditions, 4897 events. 3184/4897 cut-off events. For 903098/903112 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26968 event pairs, 632 based on Foata normal form. 8/4893 useless extension candidates. Maximal degree in co-relation 53734. Up to 4544 conditions per place. [2024-06-14 12:18:31,336 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 65 changer transitions 0/445 dead transitions. [2024-06-14 12:18:31,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 445 transitions, 6487 flow [2024-06-14 12:18:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:18:31,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:18:31,338 INFO L175 Difference]: Start difference. First operand has 308 places, 431 transitions, 5493 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:18:31,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 445 transitions, 6487 flow [2024-06-14 12:18:33,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 445 transitions, 6299 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:33,797 INFO L231 Difference]: Finished difference. Result has 311 places, 434 transitions, 5528 flow [2024-06-14 12:18:33,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5307, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5528, PETRI_PLACES=311, PETRI_TRANSITIONS=434} [2024-06-14 12:18:33,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-14 12:18:33,798 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 434 transitions, 5528 flow [2024-06-14 12:18:33,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:33,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:33,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:33,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:18:33,798 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:33,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash 748391144, now seen corresponding path program 10 times [2024-06-14 12:18:33,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:33,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951890913] [2024-06-14 12:18:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:33,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:34,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:34,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951890913] [2024-06-14 12:18:34,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951890913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:34,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:34,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:34,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620098617] [2024-06-14 12:18:34,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:34,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:34,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:34,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:34,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:34,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:34,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 434 transitions, 5528 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:34,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:34,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:34,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:35,763 INFO L124 PetriNetUnfolderBase]: 3204/4927 cut-off events. [2024-06-14 12:18:35,763 INFO L125 PetriNetUnfolderBase]: For 932324/932335 co-relation queries the response was YES. [2024-06-14 12:18:35,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54405 conditions, 4927 events. 3204/4927 cut-off events. For 932324/932335 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27173 event pairs, 683 based on Foata normal form. 6/4919 useless extension candidates. Maximal degree in co-relation 54251. Up to 4007 conditions per place. [2024-06-14 12:18:35,841 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 144 changer transitions 0/458 dead transitions. [2024-06-14 12:18:35,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 458 transitions, 7198 flow [2024-06-14 12:18:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:18:35,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 12:18:35,860 INFO L175 Difference]: Start difference. First operand has 311 places, 434 transitions, 5528 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:18:35,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 458 transitions, 7198 flow [2024-06-14 12:18:38,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 458 transitions, 7011 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:38,679 INFO L231 Difference]: Finished difference. Result has 313 places, 441 transitions, 5894 flow [2024-06-14 12:18:38,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5341, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5894, PETRI_PLACES=313, PETRI_TRANSITIONS=441} [2024-06-14 12:18:38,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-14 12:18:38,679 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 441 transitions, 5894 flow [2024-06-14 12:18:38,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:38,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:38,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:38,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:18:38,680 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:38,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1153839710, now seen corresponding path program 9 times [2024-06-14 12:18:38,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:38,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714818689] [2024-06-14 12:18:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:38,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:39,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:39,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714818689] [2024-06-14 12:18:39,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714818689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:39,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:39,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:39,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94153923] [2024-06-14 12:18:39,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:39,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:39,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:39,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:39,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:39,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 441 transitions, 5894 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:39,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:39,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:39,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:40,791 INFO L124 PetriNetUnfolderBase]: 3217/4947 cut-off events. [2024-06-14 12:18:40,792 INFO L125 PetriNetUnfolderBase]: For 946412/946426 co-relation queries the response was YES. [2024-06-14 12:18:40,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55614 conditions, 4947 events. 3217/4947 cut-off events. For 946412/946426 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 27243 event pairs, 638 based on Foata normal form. 7/4942 useless extension candidates. Maximal degree in co-relation 55459. Up to 4454 conditions per place. [2024-06-14 12:18:40,869 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 128 changer transitions 0/461 dead transitions. [2024-06-14 12:18:40,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 461 transitions, 7401 flow [2024-06-14 12:18:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:40,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:18:40,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:18:40,870 INFO L175 Difference]: Start difference. First operand has 313 places, 441 transitions, 5894 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:18:40,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 461 transitions, 7401 flow [2024-06-14 12:18:43,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 461 transitions, 7001 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:43,241 INFO L231 Difference]: Finished difference. Result has 316 places, 448 transitions, 5919 flow [2024-06-14 12:18:43,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5494, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5919, PETRI_PLACES=316, PETRI_TRANSITIONS=448} [2024-06-14 12:18:43,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-14 12:18:43,241 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 448 transitions, 5919 flow [2024-06-14 12:18:43,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:43,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:43,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:43,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:18:43,242 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:43,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:43,242 INFO L85 PathProgramCache]: Analyzing trace with hash 925938560, now seen corresponding path program 10 times [2024-06-14 12:18:43,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:43,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832083401] [2024-06-14 12:18:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:43,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:44,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:44,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832083401] [2024-06-14 12:18:44,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832083401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:44,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:44,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:44,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776029864] [2024-06-14 12:18:44,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:44,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:44,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:44,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:44,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:44,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:44,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 448 transitions, 5919 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:44,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:44,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:44,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:45,400 INFO L124 PetriNetUnfolderBase]: 3214/4943 cut-off events. [2024-06-14 12:18:45,400 INFO L125 PetriNetUnfolderBase]: For 950618/950632 co-relation queries the response was YES. [2024-06-14 12:18:45,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54835 conditions, 4943 events. 3214/4943 cut-off events. For 950618/950632 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27268 event pairs, 634 based on Foata normal form. 7/4938 useless extension candidates. Maximal degree in co-relation 54679. Up to 4570 conditions per place. [2024-06-14 12:18:45,474 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 81 changer transitions 0/460 dead transitions. [2024-06-14 12:18:45,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 460 transitions, 7065 flow [2024-06-14 12:18:45,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:18:45,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-14 12:18:45,477 INFO L175 Difference]: Start difference. First operand has 316 places, 448 transitions, 5919 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:18:45,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 460 transitions, 7065 flow [2024-06-14 12:18:48,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 460 transitions, 6847 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:48,221 INFO L231 Difference]: Finished difference. Result has 320 places, 448 transitions, 5869 flow [2024-06-14 12:18:48,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5701, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5869, PETRI_PLACES=320, PETRI_TRANSITIONS=448} [2024-06-14 12:18:48,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-14 12:18:48,221 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 448 transitions, 5869 flow [2024-06-14 12:18:48,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:48,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:48,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:48,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:18:48,222 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:48,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1148125790, now seen corresponding path program 11 times [2024-06-14 12:18:48,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:48,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808974823] [2024-06-14 12:18:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:48,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:49,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:49,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808974823] [2024-06-14 12:18:49,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808974823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:49,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:49,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:49,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926167211] [2024-06-14 12:18:49,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:49,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:49,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:49,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:49,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:49,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:49,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 448 transitions, 5869 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:49,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:49,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:49,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:50,265 INFO L124 PetriNetUnfolderBase]: 3206/4931 cut-off events. [2024-06-14 12:18:50,265 INFO L125 PetriNetUnfolderBase]: For 962749/962763 co-relation queries the response was YES. [2024-06-14 12:18:50,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54591 conditions, 4931 events. 3206/4931 cut-off events. For 962749/962763 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27163 event pairs, 636 based on Foata normal form. 8/4927 useless extension candidates. Maximal degree in co-relation 54434. Up to 4444 conditions per place. [2024-06-14 12:18:50,335 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 120 changer transitions 0/460 dead transitions. [2024-06-14 12:18:50,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 460 transitions, 7017 flow [2024-06-14 12:18:50,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:18:50,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:18:50,337 INFO L175 Difference]: Start difference. First operand has 320 places, 448 transitions, 5869 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:18:50,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 460 transitions, 7017 flow [2024-06-14 12:18:52,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 460 transitions, 6651 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:52,877 INFO L231 Difference]: Finished difference. Result has 321 places, 448 transitions, 5751 flow [2024-06-14 12:18:52,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5751, PETRI_PLACES=321, PETRI_TRANSITIONS=448} [2024-06-14 12:18:52,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-14 12:18:52,878 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 448 transitions, 5751 flow [2024-06-14 12:18:52,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:52,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:52,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:52,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:18:52,879 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:52,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:52,879 INFO L85 PathProgramCache]: Analyzing trace with hash 925522664, now seen corresponding path program 11 times [2024-06-14 12:18:52,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:52,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954897697] [2024-06-14 12:18:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:52,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:53,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:53,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954897697] [2024-06-14 12:18:53,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954897697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:53,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:53,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:53,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295438729] [2024-06-14 12:18:53,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:53,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:53,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:53,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:53,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:53,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 448 transitions, 5751 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:53,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:53,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:53,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:54,790 INFO L124 PetriNetUnfolderBase]: 3216/4945 cut-off events. [2024-06-14 12:18:54,790 INFO L125 PetriNetUnfolderBase]: For 980727/980738 co-relation queries the response was YES. [2024-06-14 12:18:54,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54891 conditions, 4945 events. 3216/4945 cut-off events. For 980727/980738 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27201 event pairs, 694 based on Foata normal form. 4/4935 useless extension candidates. Maximal degree in co-relation 54734. Up to 4016 conditions per place. [2024-06-14 12:18:54,861 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 152 changer transitions 0/471 dead transitions. [2024-06-14 12:18:54,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 471 transitions, 7393 flow [2024-06-14 12:18:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:18:54,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 12:18:54,863 INFO L175 Difference]: Start difference. First operand has 321 places, 448 transitions, 5751 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:18:54,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 471 transitions, 7393 flow [2024-06-14 12:18:57,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 471 transitions, 7139 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:57,985 INFO L231 Difference]: Finished difference. Result has 322 places, 454 transitions, 6029 flow [2024-06-14 12:18:57,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5497, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6029, PETRI_PLACES=322, PETRI_TRANSITIONS=454} [2024-06-14 12:18:57,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-14 12:18:57,986 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 454 transitions, 6029 flow [2024-06-14 12:18:57,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:57,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:57,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:57,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:18:57,986 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:57,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:57,987 INFO L85 PathProgramCache]: Analyzing trace with hash 925522850, now seen corresponding path program 12 times [2024-06-14 12:18:57,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:57,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951231700] [2024-06-14 12:18:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:57,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:59,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:59,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951231700] [2024-06-14 12:18:59,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951231700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:59,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:59,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:59,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459760970] [2024-06-14 12:18:59,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:59,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:59,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:59,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:59,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:59,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:18:59,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 454 transitions, 6029 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:18:59,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:59,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:18:59,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:00,171 INFO L124 PetriNetUnfolderBase]: 3211/4937 cut-off events. [2024-06-14 12:19:00,172 INFO L125 PetriNetUnfolderBase]: For 989994/990008 co-relation queries the response was YES. [2024-06-14 12:19:00,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55195 conditions, 4937 events. 3211/4937 cut-off events. For 989994/990008 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27171 event pairs, 642 based on Foata normal form. 7/4932 useless extension candidates. Maximal degree in co-relation 55037. Up to 4585 conditions per place. [2024-06-14 12:19:00,245 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 68 changer transitions 0/465 dead transitions. [2024-06-14 12:19:00,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 465 transitions, 6983 flow [2024-06-14 12:19:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:00,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:19:00,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:19:00,246 INFO L175 Difference]: Start difference. First operand has 322 places, 454 transitions, 6029 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:19:00,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 465 transitions, 6983 flow [2024-06-14 12:19:03,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 465 transitions, 6702 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-14 12:19:03,073 INFO L231 Difference]: Finished difference. Result has 327 places, 454 transitions, 5890 flow [2024-06-14 12:19:03,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5890, PETRI_PLACES=327, PETRI_TRANSITIONS=454} [2024-06-14 12:19:03,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-14 12:19:03,074 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 454 transitions, 5890 flow [2024-06-14 12:19:03,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:19:03,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:03,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:03,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:19:03,075 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:03,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:03,075 INFO L85 PathProgramCache]: Analyzing trace with hash 925529174, now seen corresponding path program 12 times [2024-06-14 12:19:03,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:03,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572277960] [2024-06-14 12:19:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:03,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:03,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:03,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572277960] [2024-06-14 12:19:03,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572277960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:03,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:03,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067733378] [2024-06-14 12:19:03,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:03,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:03,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:03,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:03,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:19:03,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 454 transitions, 5890 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:19:03,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:03,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:19:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:05,073 INFO L124 PetriNetUnfolderBase]: 3205/4931 cut-off events. [2024-06-14 12:19:05,074 INFO L125 PetriNetUnfolderBase]: For 993187/993198 co-relation queries the response was YES. [2024-06-14 12:19:05,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54732 conditions, 4931 events. 3205/4931 cut-off events. For 993187/993198 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27138 event pairs, 694 based on Foata normal form. 4/4921 useless extension candidates. Maximal degree in co-relation 54572. Up to 4006 conditions per place. [2024-06-14 12:19:05,151 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 154 changer transitions 0/469 dead transitions. [2024-06-14 12:19:05,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 469 transitions, 7096 flow [2024-06-14 12:19:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:19:05,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 12:19:05,153 INFO L175 Difference]: Start difference. First operand has 327 places, 454 transitions, 5890 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:19:05,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 469 transitions, 7096 flow [2024-06-14 12:19:08,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 469 transitions, 6836 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:08,318 INFO L231 Difference]: Finished difference. Result has 327 places, 454 transitions, 5944 flow [2024-06-14 12:19:08,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5630, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5944, PETRI_PLACES=327, PETRI_TRANSITIONS=454} [2024-06-14 12:19:08,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-14 12:19:08,319 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 454 transitions, 5944 flow [2024-06-14 12:19:08,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:19:08,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:08,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:08,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:19:08,319 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:08,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1229025098, now seen corresponding path program 4 times [2024-06-14 12:19:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:08,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913205337] [2024-06-14 12:19:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:08,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:09,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:09,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913205337] [2024-06-14 12:19:09,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913205337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:09,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:09,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:09,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347236107] [2024-06-14 12:19:09,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:09,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:09,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:09,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:09,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:09,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:19:09,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 454 transitions, 5944 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:19:09,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:09,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:19:09,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:10,229 INFO L124 PetriNetUnfolderBase]: 3208/4934 cut-off events. [2024-06-14 12:19:10,229 INFO L125 PetriNetUnfolderBase]: For 1012496/1012510 co-relation queries the response was YES. [2024-06-14 12:19:10,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54955 conditions, 4934 events. 3208/4934 cut-off events. For 1012496/1012510 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27193 event pairs, 640 based on Foata normal form. 10/4932 useless extension candidates. Maximal degree in co-relation 54794. Up to 4573 conditions per place. [2024-06-14 12:19:10,304 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 399 selfloop transitions, 66 changer transitions 0/469 dead transitions. [2024-06-14 12:19:10,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 469 transitions, 7050 flow [2024-06-14 12:19:10,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:19:10,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:19:10,305 INFO L175 Difference]: Start difference. First operand has 327 places, 454 transitions, 5944 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:19:10,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 469 transitions, 7050 flow [2024-06-14 12:19:13,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 469 transitions, 6734 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:13,652 INFO L231 Difference]: Finished difference. Result has 328 places, 457 transitions, 5914 flow [2024-06-14 12:19:13,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5628, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5914, PETRI_PLACES=328, PETRI_TRANSITIONS=457} [2024-06-14 12:19:13,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-14 12:19:13,652 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 457 transitions, 5914 flow [2024-06-14 12:19:13,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-14 12:19:13,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:13,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:13,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:19:13,653 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:13,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:13,653 INFO L85 PathProgramCache]: Analyzing trace with hash 56924312, now seen corresponding path program 5 times [2024-06-14 12:19:13,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:13,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454691646] [2024-06-14 12:19:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:13,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:14,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:14,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454691646] [2024-06-14 12:19:14,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454691646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:14,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:14,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:14,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29267393] [2024-06-14 12:19:14,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:14,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:14,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:14,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:15,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:19:15,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 457 transitions, 5914 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:15,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:15,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:19:15,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:16,143 INFO L124 PetriNetUnfolderBase]: 3250/4991 cut-off events. [2024-06-14 12:19:16,144 INFO L125 PetriNetUnfolderBase]: For 1048732/1048746 co-relation queries the response was YES. [2024-06-14 12:19:16,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56272 conditions, 4991 events. 3250/4991 cut-off events. For 1048732/1048746 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27540 event pairs, 623 based on Foata normal form. 8/4987 useless extension candidates. Maximal degree in co-relation 56110. Up to 4347 conditions per place. [2024-06-14 12:19:16,223 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 370 selfloop transitions, 137 changer transitions 0/511 dead transitions. [2024-06-14 12:19:16,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 511 transitions, 8561 flow [2024-06-14 12:19:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:19:16,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 12:19:16,224 INFO L175 Difference]: Start difference. First operand has 328 places, 457 transitions, 5914 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:19:16,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 511 transitions, 8561 flow [2024-06-14 12:19:18,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 511 transitions, 8297 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:18,896 INFO L231 Difference]: Finished difference. Result has 334 places, 487 transitions, 6822 flow [2024-06-14 12:19:18,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6822, PETRI_PLACES=334, PETRI_TRANSITIONS=487} [2024-06-14 12:19:18,897 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-14 12:19:18,897 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 487 transitions, 6822 flow [2024-06-14 12:19:18,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:18,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:18,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:18,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:19:18,898 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:18,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash 748278924, now seen corresponding path program 6 times [2024-06-14 12:19:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028976128] [2024-06-14 12:19:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:20,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028976128] [2024-06-14 12:19:20,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028976128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:20,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:20,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:20,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638405540] [2024-06-14 12:19:20,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:20,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:20,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:19:20,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 487 transitions, 6822 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:20,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:20,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:19:20,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:21,407 INFO L124 PetriNetUnfolderBase]: 3260/5010 cut-off events. [2024-06-14 12:19:21,408 INFO L125 PetriNetUnfolderBase]: For 1071061/1071075 co-relation queries the response was YES. [2024-06-14 12:19:21,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57402 conditions, 5010 events. 3260/5010 cut-off events. For 1071061/1071075 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 27671 event pairs, 638 based on Foata normal form. 8/5006 useless extension candidates. Maximal degree in co-relation 57236. Up to 4645 conditions per place. [2024-06-14 12:19:21,478 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 428 selfloop transitions, 71 changer transitions 0/503 dead transitions. [2024-06-14 12:19:21,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 503 transitions, 8027 flow [2024-06-14 12:19:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:19:21,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 12:19:21,480 INFO L175 Difference]: Start difference. First operand has 334 places, 487 transitions, 6822 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:19:21,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 503 transitions, 8027 flow [2024-06-14 12:19:24,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 503 transitions, 7702 flow, removed 129 selfloop flow, removed 3 redundant places. [2024-06-14 12:19:24,501 INFO L231 Difference]: Finished difference. Result has 340 places, 491 transitions, 6827 flow [2024-06-14 12:19:24,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6511, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6827, PETRI_PLACES=340, PETRI_TRANSITIONS=491} [2024-06-14 12:19:24,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-14 12:19:24,501 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 491 transitions, 6827 flow [2024-06-14 12:19:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:24,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:24,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:24,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:19:24,502 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:24,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:24,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1148134284, now seen corresponding path program 7 times [2024-06-14 12:19:24,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:24,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99356391] [2024-06-14 12:19:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:24,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:25,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:25,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99356391] [2024-06-14 12:19:25,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99356391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:25,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:25,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:25,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379312155] [2024-06-14 12:19:25,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:25,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:25,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:25,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:19:25,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 491 transitions, 6827 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:25,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:25,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:19:25,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:27,137 INFO L124 PetriNetUnfolderBase]: 3288/5051 cut-off events. [2024-06-14 12:19:27,137 INFO L125 PetriNetUnfolderBase]: For 1096226/1096240 co-relation queries the response was YES. [2024-06-14 12:19:27,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58192 conditions, 5051 events. 3288/5051 cut-off events. For 1096226/1096240 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27944 event pairs, 627 based on Foata normal form. 8/5047 useless extension candidates. Maximal degree in co-relation 58024. Up to 4385 conditions per place. [2024-06-14 12:19:27,215 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 376 selfloop transitions, 143 changer transitions 0/523 dead transitions. [2024-06-14 12:19:27,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 523 transitions, 9042 flow [2024-06-14 12:19:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:19:27,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 12:19:27,217 INFO L175 Difference]: Start difference. First operand has 340 places, 491 transitions, 6827 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:19:27,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 523 transitions, 9042 flow [2024-06-14 12:19:30,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 523 transitions, 8763 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:30,550 INFO L231 Difference]: Finished difference. Result has 343 places, 499 transitions, 7125 flow [2024-06-14 12:19:30,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7125, PETRI_PLACES=343, PETRI_TRANSITIONS=499} [2024-06-14 12:19:30,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-14 12:19:30,551 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 499 transitions, 7125 flow [2024-06-14 12:19:30,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:30,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:30,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:30,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:19:30,551 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:30,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:30,552 INFO L85 PathProgramCache]: Analyzing trace with hash -342560908, now seen corresponding path program 8 times [2024-06-14 12:19:30,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:30,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140694577] [2024-06-14 12:19:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:30,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:31,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:31,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140694577] [2024-06-14 12:19:31,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140694577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:31,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:31,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:31,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841505621] [2024-06-14 12:19:31,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:31,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:31,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:31,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:31,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:19:31,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 499 transitions, 7125 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:31,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:31,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:19:31,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:32,968 INFO L124 PetriNetUnfolderBase]: 3300/5072 cut-off events. [2024-06-14 12:19:32,968 INFO L125 PetriNetUnfolderBase]: For 1116104/1116118 co-relation queries the response was YES. [2024-06-14 12:19:33,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58826 conditions, 5072 events. 3300/5072 cut-off events. For 1116104/1116118 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28094 event pairs, 637 based on Foata normal form. 8/5068 useless extension candidates. Maximal degree in co-relation 58656. Up to 4625 conditions per place. [2024-06-14 12:19:33,048 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 430 selfloop transitions, 87 changer transitions 0/521 dead transitions. [2024-06-14 12:19:33,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 521 transitions, 8755 flow [2024-06-14 12:19:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:19:33,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:19:33,049 INFO L175 Difference]: Start difference. First operand has 343 places, 499 transitions, 7125 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:19:33,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 521 transitions, 8755 flow [2024-06-14 12:19:36,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 521 transitions, 8380 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:36,091 INFO L231 Difference]: Finished difference. Result has 348 places, 506 transitions, 7215 flow [2024-06-14 12:19:36,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6758, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7215, PETRI_PLACES=348, PETRI_TRANSITIONS=506} [2024-06-14 12:19:36,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-14 12:19:36,091 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 506 transitions, 7215 flow [2024-06-14 12:19:36,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:36,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:36,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:36,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:19:36,092 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:36,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash 71221636, now seen corresponding path program 2 times [2024-06-14 12:19:36,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:36,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829612957] [2024-06-14 12:19:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:36,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:37,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:37,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829612957] [2024-06-14 12:19:37,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829612957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:37,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:37,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:37,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063075106] [2024-06-14 12:19:37,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:37,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:37,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:37,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:37,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:19:37,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 506 transitions, 7215 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:37,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:37,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:19:37,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:39,074 INFO L124 PetriNetUnfolderBase]: 3305/5081 cut-off events. [2024-06-14 12:19:39,074 INFO L125 PetriNetUnfolderBase]: For 1135381/1135385 co-relation queries the response was YES. [2024-06-14 12:19:39,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58923 conditions, 5081 events. 3305/5081 cut-off events. For 1135381/1135385 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28133 event pairs, 657 based on Foata normal form. 2/5081 useless extension candidates. Maximal degree in co-relation 58751. Up to 4919 conditions per place. [2024-06-14 12:19:39,146 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 26 changer transitions 0/522 dead transitions. [2024-06-14 12:19:39,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 522 transitions, 8577 flow [2024-06-14 12:19:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:19:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:19:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-14 12:19:39,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2024-06-14 12:19:39,148 INFO L175 Difference]: Start difference. First operand has 348 places, 506 transitions, 7215 flow. Second operand 10 states and 144 transitions. [2024-06-14 12:19:39,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 522 transitions, 8577 flow [2024-06-14 12:19:42,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 522 transitions, 8306 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:42,317 INFO L231 Difference]: Finished difference. Result has 353 places, 509 transitions, 7076 flow [2024-06-14 12:19:42,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7076, PETRI_PLACES=353, PETRI_TRANSITIONS=509} [2024-06-14 12:19:42,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-14 12:19:42,318 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 509 transitions, 7076 flow [2024-06-14 12:19:42,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:42,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:42,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:42,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:19:42,318 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:42,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:42,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1161943854, now seen corresponding path program 9 times [2024-06-14 12:19:42,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:42,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68850328] [2024-06-14 12:19:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:42,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:43,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:43,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68850328] [2024-06-14 12:19:43,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68850328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:43,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:43,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:43,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343699890] [2024-06-14 12:19:43,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:43,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:43,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:43,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:43,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:19:43,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 509 transitions, 7076 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:43,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:43,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:19:43,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:45,074 INFO L124 PetriNetUnfolderBase]: 3301/5078 cut-off events. [2024-06-14 12:19:45,074 INFO L125 PetriNetUnfolderBase]: For 1143589/1143599 co-relation queries the response was YES. [2024-06-14 12:19:45,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58543 conditions, 5078 events. 3301/5078 cut-off events. For 1143589/1143599 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28137 event pairs, 657 based on Foata normal form. 7/5082 useless extension candidates. Maximal degree in co-relation 58369. Up to 4868 conditions per place. [2024-06-14 12:19:45,155 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 45 changer transitions 0/522 dead transitions. [2024-06-14 12:19:45,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 522 transitions, 8393 flow [2024-06-14 12:19:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 12:19:45,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-14 12:19:45,156 INFO L175 Difference]: Start difference. First operand has 353 places, 509 transitions, 7076 flow. Second operand 9 states and 138 transitions. [2024-06-14 12:19:45,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 522 transitions, 8393 flow [2024-06-14 12:19:48,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 522 transitions, 8171 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:48,664 INFO L231 Difference]: Finished difference. Result has 356 places, 510 transitions, 6996 flow [2024-06-14 12:19:48,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6854, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6996, PETRI_PLACES=356, PETRI_TRANSITIONS=510} [2024-06-14 12:19:48,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-14 12:19:48,665 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 510 transitions, 6996 flow [2024-06-14 12:19:48,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:48,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:48,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:48,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:19:48,680 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:48,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1241416604, now seen corresponding path program 3 times [2024-06-14 12:19:48,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:48,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511647510] [2024-06-14 12:19:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:48,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:50,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:50,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511647510] [2024-06-14 12:19:50,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511647510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:50,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:50,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:50,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893792187] [2024-06-14 12:19:50,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:50,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:50,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:50,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:50,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:50,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:19:50,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 510 transitions, 6996 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:50,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:50,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:19:50,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:51,892 INFO L124 PetriNetUnfolderBase]: 3298/5071 cut-off events. [2024-06-14 12:19:51,893 INFO L125 PetriNetUnfolderBase]: For 1155107/1155111 co-relation queries the response was YES. [2024-06-14 12:19:51,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58438 conditions, 5071 events. 3298/5071 cut-off events. For 1155107/1155111 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28054 event pairs, 653 based on Foata normal form. 2/5071 useless extension candidates. Maximal degree in co-relation 58262. Up to 4917 conditions per place. [2024-06-14 12:19:51,968 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 497 selfloop transitions, 20 changer transitions 0/521 dead transitions. [2024-06-14 12:19:51,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 521 transitions, 8058 flow [2024-06-14 12:19:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-14 12:19:51,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-14 12:19:51,970 INFO L175 Difference]: Start difference. First operand has 356 places, 510 transitions, 6996 flow. Second operand 9 states and 130 transitions. [2024-06-14 12:19:51,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 521 transitions, 8058 flow [2024-06-14 12:19:55,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 521 transitions, 7581 flow, removed 61 selfloop flow, removed 12 redundant places. [2024-06-14 12:19:55,088 INFO L231 Difference]: Finished difference. Result has 353 places, 510 transitions, 6565 flow [2024-06-14 12:19:55,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6519, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6565, PETRI_PLACES=353, PETRI_TRANSITIONS=510} [2024-06-14 12:19:55,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-14 12:19:55,088 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 510 transitions, 6565 flow [2024-06-14 12:19:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:55,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:55,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:55,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:19:55,092 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:55,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:55,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1229381970, now seen corresponding path program 10 times [2024-06-14 12:19:55,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:55,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496706833] [2024-06-14 12:19:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:55,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:56,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:56,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496706833] [2024-06-14 12:19:56,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496706833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:56,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:56,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:56,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760000917] [2024-06-14 12:19:56,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:56,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:56,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:56,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:56,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:19:56,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 510 transitions, 6565 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:56,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:56,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:19:56,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:57,622 INFO L124 PetriNetUnfolderBase]: 3350/5148 cut-off events. [2024-06-14 12:19:57,622 INFO L125 PetriNetUnfolderBase]: For 1217791/1217805 co-relation queries the response was YES. [2024-06-14 12:19:57,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59335 conditions, 5148 events. 3350/5148 cut-off events. For 1217791/1217805 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28571 event pairs, 635 based on Foata normal form. 10/5146 useless extension candidates. Maximal degree in co-relation 59163. Up to 4647 conditions per place. [2024-06-14 12:19:57,712 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 100 changer transitions 0/540 dead transitions. [2024-06-14 12:19:57,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 540 transitions, 8773 flow [2024-06-14 12:19:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:19:57,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 12:19:57,714 INFO L175 Difference]: Start difference. First operand has 353 places, 510 transitions, 6565 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:19:57,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 540 transitions, 8773 flow [2024-06-14 12:20:01,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 540 transitions, 8715 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 12:20:01,686 INFO L231 Difference]: Finished difference. Result has 355 places, 524 transitions, 7324 flow [2024-06-14 12:20:01,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6507, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7324, PETRI_PLACES=355, PETRI_TRANSITIONS=524} [2024-06-14 12:20:01,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-14 12:20:01,687 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 524 transitions, 7324 flow [2024-06-14 12:20:01,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:01,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:01,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:01,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:20:01,688 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:01,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1872926794, now seen corresponding path program 1 times [2024-06-14 12:20:01,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:01,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492132378] [2024-06-14 12:20:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:01,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:02,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:02,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492132378] [2024-06-14 12:20:02,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492132378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:02,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:02,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:02,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200779230] [2024-06-14 12:20:02,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:02,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:02,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:02,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:02,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:02,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:20:02,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 524 transitions, 7324 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:02,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:02,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:20:02,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:04,033 INFO L124 PetriNetUnfolderBase]: 3213/5013 cut-off events. [2024-06-14 12:20:04,034 INFO L125 PetriNetUnfolderBase]: For 1244726/1244730 co-relation queries the response was YES. [2024-06-14 12:20:04,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59727 conditions, 5013 events. 3213/5013 cut-off events. For 1244726/1244730 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 28497 event pairs, 587 based on Foata normal form. 3/5010 useless extension candidates. Maximal degree in co-relation 59552. Up to 4653 conditions per place. [2024-06-14 12:20:04,123 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 500 selfloop transitions, 17 changer transitions 0/547 dead transitions. [2024-06-14 12:20:04,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 547 transitions, 8496 flow [2024-06-14 12:20:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:20:04,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 12:20:04,124 INFO L175 Difference]: Start difference. First operand has 355 places, 524 transitions, 7324 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:20:04,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 547 transitions, 8496 flow [2024-06-14 12:20:08,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 547 transitions, 8153 flow, removed 135 selfloop flow, removed 4 redundant places. [2024-06-14 12:20:08,164 INFO L231 Difference]: Finished difference. Result has 359 places, 526 transitions, 7102 flow [2024-06-14 12:20:08,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6981, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7102, PETRI_PLACES=359, PETRI_TRANSITIONS=526} [2024-06-14 12:20:08,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-14 12:20:08,165 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 526 transitions, 7102 flow [2024-06-14 12:20:08,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:08,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:08,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:08,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:20:08,165 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:08,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1291784424, now seen corresponding path program 1 times [2024-06-14 12:20:08,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:08,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847864208] [2024-06-14 12:20:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:08,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:09,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:09,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847864208] [2024-06-14 12:20:09,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847864208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:09,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:09,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:09,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348166282] [2024-06-14 12:20:09,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:09,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:09,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:09,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:09,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:09,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:20:09,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 526 transitions, 7102 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:09,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:09,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:20:09,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:10,506 INFO L124 PetriNetUnfolderBase]: 3208/5006 cut-off events. [2024-06-14 12:20:10,506 INFO L125 PetriNetUnfolderBase]: For 1241318/1241322 co-relation queries the response was YES. [2024-06-14 12:20:10,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59134 conditions, 5006 events. 3208/5006 cut-off events. For 1241318/1241322 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 28452 event pairs, 616 based on Foata normal form. 3/5003 useless extension candidates. Maximal degree in co-relation 58957. Up to 4653 conditions per place. [2024-06-14 12:20:10,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 492 selfloop transitions, 25 changer transitions 0/547 dead transitions. [2024-06-14 12:20:10,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 547 transitions, 8276 flow [2024-06-14 12:20:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:10,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:20:10,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:20:10,587 INFO L175 Difference]: Start difference. First operand has 359 places, 526 transitions, 7102 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:20:10,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 547 transitions, 8276 flow [2024-06-14 12:20:14,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 547 transitions, 8169 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:14,945 INFO L231 Difference]: Finished difference. Result has 361 places, 529 transitions, 7135 flow [2024-06-14 12:20:14,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7135, PETRI_PLACES=361, PETRI_TRANSITIONS=529} [2024-06-14 12:20:14,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-14 12:20:14,946 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 529 transitions, 7135 flow [2024-06-14 12:20:14,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:14,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:14,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:14,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:20:14,946 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:14,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash -776419730, now seen corresponding path program 2 times [2024-06-14 12:20:14,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:14,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260203074] [2024-06-14 12:20:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:14,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:15,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:15,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260203074] [2024-06-14 12:20:15,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260203074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:15,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:15,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:15,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117275713] [2024-06-14 12:20:15,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:15,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:15,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:15,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:20:15,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 529 transitions, 7135 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:15,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:15,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:20:15,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:17,252 INFO L124 PetriNetUnfolderBase]: 3216/5016 cut-off events. [2024-06-14 12:20:17,252 INFO L125 PetriNetUnfolderBase]: For 1262590/1262594 co-relation queries the response was YES. [2024-06-14 12:20:17,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59432 conditions, 5016 events. 3216/5016 cut-off events. For 1262590/1262594 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 28516 event pairs, 616 based on Foata normal form. 3/5011 useless extension candidates. Maximal degree in co-relation 59254. Up to 4668 conditions per place. [2024-06-14 12:20:17,332 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 498 selfloop transitions, 21 changer transitions 0/549 dead transitions. [2024-06-14 12:20:17,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 549 transitions, 8313 flow [2024-06-14 12:20:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:20:17,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:20:17,334 INFO L175 Difference]: Start difference. First operand has 361 places, 529 transitions, 7135 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:20:17,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 549 transitions, 8313 flow [2024-06-14 12:20:21,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 549 transitions, 8215 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:21,650 INFO L231 Difference]: Finished difference. Result has 363 places, 531 transitions, 7171 flow [2024-06-14 12:20:21,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7037, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7171, PETRI_PLACES=363, PETRI_TRANSITIONS=531} [2024-06-14 12:20:21,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-14 12:20:21,650 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 531 transitions, 7171 flow [2024-06-14 12:20:21,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:21,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:21,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:21,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:20:21,651 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:21,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:21,651 INFO L85 PathProgramCache]: Analyzing trace with hash -661013240, now seen corresponding path program 3 times [2024-06-14 12:20:21,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:21,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108740173] [2024-06-14 12:20:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:21,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:22,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:22,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108740173] [2024-06-14 12:20:22,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108740173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:22,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:22,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:22,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462960074] [2024-06-14 12:20:22,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:22,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:22,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:22,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:20:22,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 531 transitions, 7171 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:22,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:22,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:20:22,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:24,066 INFO L124 PetriNetUnfolderBase]: 3224/5035 cut-off events. [2024-06-14 12:20:24,067 INFO L125 PetriNetUnfolderBase]: For 1285143/1285147 co-relation queries the response was YES. [2024-06-14 12:20:24,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59847 conditions, 5035 events. 3224/5035 cut-off events. For 1285143/1285147 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 28658 event pairs, 599 based on Foata normal form. 3/5028 useless extension candidates. Maximal degree in co-relation 59668. Up to 4673 conditions per place. [2024-06-14 12:20:24,149 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 493 selfloop transitions, 26 changer transitions 0/549 dead transitions. [2024-06-14 12:20:24,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 549 transitions, 8353 flow [2024-06-14 12:20:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:20:24,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:20:24,150 INFO L175 Difference]: Start difference. First operand has 363 places, 531 transitions, 7171 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:20:24,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 549 transitions, 8353 flow [2024-06-14 12:20:28,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 549 transitions, 8237 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:28,455 INFO L231 Difference]: Finished difference. Result has 365 places, 533 transitions, 7202 flow [2024-06-14 12:20:28,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7055, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7202, PETRI_PLACES=365, PETRI_TRANSITIONS=533} [2024-06-14 12:20:28,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-14 12:20:28,455 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 533 transitions, 7202 flow [2024-06-14 12:20:28,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:28,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:28,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:28,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:20:28,456 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:28,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash -165429140, now seen corresponding path program 4 times [2024-06-14 12:20:28,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:28,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027477822] [2024-06-14 12:20:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:28,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:29,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:29,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027477822] [2024-06-14 12:20:29,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027477822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:29,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:29,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:29,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557034703] [2024-06-14 12:20:29,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:29,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:29,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:29,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:29,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:29,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:20:29,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 533 transitions, 7202 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-14 12:20:29,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:29,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:20:29,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:30,851 INFO L124 PetriNetUnfolderBase]: 3219/5019 cut-off events. [2024-06-14 12:20:30,852 INFO L125 PetriNetUnfolderBase]: For 1290856/1290863 co-relation queries the response was YES. [2024-06-14 12:20:30,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59639 conditions, 5019 events. 3219/5019 cut-off events. For 1290856/1290863 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 28520 event pairs, 619 based on Foata normal form. 3/5008 useless extension candidates. Maximal degree in co-relation 59459. Up to 4654 conditions per place. [2024-06-14 12:20:30,933 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 485 selfloop transitions, 33 changer transitions 0/548 dead transitions. [2024-06-14 12:20:30,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 548 transitions, 8376 flow [2024-06-14 12:20:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:20:30,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:20:30,934 INFO L175 Difference]: Start difference. First operand has 365 places, 533 transitions, 7202 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:20:30,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 548 transitions, 8376 flow [2024-06-14 12:20:35,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 548 transitions, 8245 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:35,906 INFO L231 Difference]: Finished difference. Result has 367 places, 535 transitions, 7236 flow [2024-06-14 12:20:35,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7071, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7236, PETRI_PLACES=367, PETRI_TRANSITIONS=535} [2024-06-14 12:20:35,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-14 12:20:35,906 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 535 transitions, 7236 flow [2024-06-14 12:20:35,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-14 12:20:35,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:35,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:35,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:20:35,907 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:35,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash 569229090, now seen corresponding path program 1 times [2024-06-14 12:20:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358971980] [2024-06-14 12:20:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:36,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:36,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358971980] [2024-06-14 12:20:36,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358971980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:36,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:36,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:36,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018300204] [2024-06-14 12:20:36,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:36,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:36,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:36,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:36,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:36,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:20:36,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 535 transitions, 7236 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:36,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:36,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:20:36,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:38,275 INFO L124 PetriNetUnfolderBase]: 3379/5208 cut-off events. [2024-06-14 12:20:38,275 INFO L125 PetriNetUnfolderBase]: For 1313994/1314006 co-relation queries the response was YES. [2024-06-14 12:20:38,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61023 conditions, 5208 events. 3379/5208 cut-off events. For 1313994/1314006 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 28965 event pairs, 469 based on Foata normal form. 14/5219 useless extension candidates. Maximal degree in co-relation 60842. Up to 4823 conditions per place. [2024-06-14 12:20:38,364 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 523 selfloop transitions, 41 changer transitions 0/568 dead transitions. [2024-06-14 12:20:38,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 568 transitions, 8599 flow [2024-06-14 12:20:38,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:20:38,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:20:38,365 INFO L175 Difference]: Start difference. First operand has 367 places, 535 transitions, 7236 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:20:38,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 568 transitions, 8599 flow [2024-06-14 12:20:43,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 568 transitions, 8450 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:43,183 INFO L231 Difference]: Finished difference. Result has 370 places, 538 transitions, 7319 flow [2024-06-14 12:20:43,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7319, PETRI_PLACES=370, PETRI_TRANSITIONS=538} [2024-06-14 12:20:43,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-14 12:20:43,184 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 538 transitions, 7319 flow [2024-06-14 12:20:43,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:43,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:43,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:43,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:20:43,185 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:43,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:43,185 INFO L85 PathProgramCache]: Analyzing trace with hash 901470120, now seen corresponding path program 2 times [2024-06-14 12:20:43,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:43,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922058195] [2024-06-14 12:20:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:43,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:44,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:44,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922058195] [2024-06-14 12:20:44,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922058195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:44,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:44,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:44,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589937181] [2024-06-14 12:20:44,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:44,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:44,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:44,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:44,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:20:44,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 538 transitions, 7319 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:44,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:44,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:20:44,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:45,772 INFO L124 PetriNetUnfolderBase]: 3395/5224 cut-off events. [2024-06-14 12:20:45,772 INFO L125 PetriNetUnfolderBase]: For 1337593/1337605 co-relation queries the response was YES. [2024-06-14 12:20:45,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61732 conditions, 5224 events. 3395/5224 cut-off events. For 1337593/1337605 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29089 event pairs, 599 based on Foata normal form. 14/5235 useless extension candidates. Maximal degree in co-relation 61550. Up to 4900 conditions per place. [2024-06-14 12:20:45,861 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 521 selfloop transitions, 42 changer transitions 0/567 dead transitions. [2024-06-14 12:20:45,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 567 transitions, 8674 flow [2024-06-14 12:20:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:20:45,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 12:20:45,863 INFO L175 Difference]: Start difference. First operand has 370 places, 538 transitions, 7319 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:20:45,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 567 transitions, 8674 flow [2024-06-14 12:20:50,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 567 transitions, 8464 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:50,055 INFO L231 Difference]: Finished difference. Result has 372 places, 541 transitions, 7349 flow [2024-06-14 12:20:50,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7109, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7349, PETRI_PLACES=372, PETRI_TRANSITIONS=541} [2024-06-14 12:20:50,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-14 12:20:50,056 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 541 transitions, 7349 flow [2024-06-14 12:20:50,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:50,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:50,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:50,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:20:50,056 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:50,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash 835252800, now seen corresponding path program 3 times [2024-06-14 12:20:50,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:50,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738033793] [2024-06-14 12:20:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:50,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:51,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:51,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738033793] [2024-06-14 12:20:51,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738033793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:51,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:51,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:51,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417930280] [2024-06-14 12:20:51,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:51,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:51,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:51,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:51,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:51,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:20:51,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 541 transitions, 7349 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:51,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:51,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:20:51,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:52,558 INFO L124 PetriNetUnfolderBase]: 3411/5248 cut-off events. [2024-06-14 12:20:52,558 INFO L125 PetriNetUnfolderBase]: For 1361163/1361175 co-relation queries the response was YES. [2024-06-14 12:20:52,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62199 conditions, 5248 events. 3411/5248 cut-off events. For 1361163/1361175 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29285 event pairs, 603 based on Foata normal form. 14/5259 useless extension candidates. Maximal degree in co-relation 62016. Up to 4934 conditions per place. [2024-06-14 12:20:52,660 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 522 selfloop transitions, 43 changer transitions 0/569 dead transitions. [2024-06-14 12:20:52,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 569 transitions, 8712 flow [2024-06-14 12:20:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:20:52,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 12:20:52,662 INFO L175 Difference]: Start difference. First operand has 372 places, 541 transitions, 7349 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:20:52,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 569 transitions, 8712 flow [2024-06-14 12:20:56,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 569 transitions, 8494 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:56,846 INFO L231 Difference]: Finished difference. Result has 374 places, 544 transitions, 7379 flow [2024-06-14 12:20:56,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7131, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7379, PETRI_PLACES=374, PETRI_TRANSITIONS=544} [2024-06-14 12:20:56,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-14 12:20:56,847 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 544 transitions, 7379 flow [2024-06-14 12:20:56,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:56,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:56,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:56,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:20:56,847 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:56,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash 318707210, now seen corresponding path program 1 times [2024-06-14 12:20:56,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:56,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475430743] [2024-06-14 12:20:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:56,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:57,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:57,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475430743] [2024-06-14 12:20:57,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475430743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:57,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:57,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:57,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095408773] [2024-06-14 12:20:57,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:57,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:57,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:57,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:57,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:20:57,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 544 transitions, 7379 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:57,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:57,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:20:57,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:59,040 INFO L124 PetriNetUnfolderBase]: 3421/5266 cut-off events. [2024-06-14 12:20:59,040 INFO L125 PetriNetUnfolderBase]: For 1364541/1364550 co-relation queries the response was YES. [2024-06-14 12:20:59,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62468 conditions, 5266 events. 3421/5266 cut-off events. For 1364541/1364550 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 29357 event pairs, 607 based on Foata normal form. 8/5270 useless extension candidates. Maximal degree in co-relation 62284. Up to 4660 conditions per place. [2024-06-14 12:20:59,128 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 482 selfloop transitions, 94 changer transitions 0/580 dead transitions. [2024-06-14 12:20:59,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 580 transitions, 8790 flow [2024-06-14 12:20:59,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:20:59,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:20:59,129 INFO L175 Difference]: Start difference. First operand has 374 places, 544 transitions, 7379 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:20:59,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 580 transitions, 8790 flow [2024-06-14 12:21:03,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 580 transitions, 8564 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:03,344 INFO L231 Difference]: Finished difference. Result has 376 places, 552 transitions, 7512 flow [2024-06-14 12:21:03,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7153, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7512, PETRI_PLACES=376, PETRI_TRANSITIONS=552} [2024-06-14 12:21:03,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-14 12:21:03,345 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 552 transitions, 7512 flow [2024-06-14 12:21:03,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:03,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:03,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:03,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:21:03,345 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:03,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:03,346 INFO L85 PathProgramCache]: Analyzing trace with hash -54116806, now seen corresponding path program 2 times [2024-06-14 12:21:03,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:03,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051762889] [2024-06-14 12:21:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:03,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:04,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:04,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051762889] [2024-06-14 12:21:04,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051762889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:04,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:04,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:04,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198038974] [2024-06-14 12:21:04,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:04,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:04,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:04,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:04,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:04,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:21:04,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 552 transitions, 7512 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:04,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:04,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:21:04,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:05,558 INFO L124 PetriNetUnfolderBase]: 3447/5306 cut-off events. [2024-06-14 12:21:05,558 INFO L125 PetriNetUnfolderBase]: For 1398654/1398663 co-relation queries the response was YES. [2024-06-14 12:21:05,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63570 conditions, 5306 events. 3447/5306 cut-off events. For 1398654/1398663 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 29641 event pairs, 603 based on Foata normal form. 8/5310 useless extension candidates. Maximal degree in co-relation 63384. Up to 4653 conditions per place. [2024-06-14 12:21:05,649 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 102 changer transitions 0/584 dead transitions. [2024-06-14 12:21:05,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 584 transitions, 9209 flow [2024-06-14 12:21:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:21:05,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-14 12:21:05,650 INFO L175 Difference]: Start difference. First operand has 376 places, 552 transitions, 7512 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:21:05,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 584 transitions, 9209 flow [2024-06-14 12:21:09,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 584 transitions, 8997 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:09,179 INFO L231 Difference]: Finished difference. Result has 380 places, 558 transitions, 7696 flow [2024-06-14 12:21:09,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7300, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7696, PETRI_PLACES=380, PETRI_TRANSITIONS=558} [2024-06-14 12:21:09,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-14 12:21:09,179 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 558 transitions, 7696 flow [2024-06-14 12:21:09,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:09,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:09,180 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] [2024-06-14 12:21:09,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:21:09,180 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:09,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash -57811696, now seen corresponding path program 3 times [2024-06-14 12:21:09,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:09,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549244430] [2024-06-14 12:21:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:09,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:09,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549244430] [2024-06-14 12:21:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549244430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:09,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:09,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:09,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109197242] [2024-06-14 12:21:09,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:09,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:09,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:09,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:09,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:21:09,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 558 transitions, 7696 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:09,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:09,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:21:09,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:11,365 INFO L124 PetriNetUnfolderBase]: 3457/5324 cut-off events. [2024-06-14 12:21:11,365 INFO L125 PetriNetUnfolderBase]: For 1420214/1420221 co-relation queries the response was YES. [2024-06-14 12:21:11,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63949 conditions, 5324 events. 3457/5324 cut-off events. For 1420214/1420221 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 29839 event pairs, 609 based on Foata normal form. 3/5323 useless extension candidates. Maximal degree in co-relation 63762. Up to 4710 conditions per place. [2024-06-14 12:21:11,455 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 494 selfloop transitions, 93 changer transitions 0/591 dead transitions. [2024-06-14 12:21:11,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 591 transitions, 9144 flow [2024-06-14 12:21:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:21:11,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:21:11,456 INFO L175 Difference]: Start difference. First operand has 380 places, 558 transitions, 7696 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:21:11,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 591 transitions, 9144 flow [2024-06-14 12:21:16,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 591 transitions, 8940 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:16,159 INFO L231 Difference]: Finished difference. Result has 385 places, 566 transitions, 7877 flow [2024-06-14 12:21:16,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7506, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7877, PETRI_PLACES=385, PETRI_TRANSITIONS=566} [2024-06-14 12:21:16,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-14 12:21:16,160 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 566 transitions, 7877 flow [2024-06-14 12:21:16,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:16,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:16,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:16,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:21:16,161 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:16,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:16,161 INFO L85 PathProgramCache]: Analyzing trace with hash -110236225, now seen corresponding path program 1 times [2024-06-14 12:21:16,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:16,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817256459] [2024-06-14 12:21:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:16,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:17,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817256459] [2024-06-14 12:21:17,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817256459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:17,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:17,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:17,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473582770] [2024-06-14 12:21:17,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:17,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:17,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:17,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:21:17,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 566 transitions, 7877 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:17,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:17,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:21:17,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:18,520 INFO L124 PetriNetUnfolderBase]: 3451/5297 cut-off events. [2024-06-14 12:21:18,520 INFO L125 PetriNetUnfolderBase]: For 1425687/1425694 co-relation queries the response was YES. [2024-06-14 12:21:18,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64220 conditions, 5297 events. 3451/5297 cut-off events. For 1425687/1425694 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29465 event pairs, 601 based on Foata normal form. 3/5296 useless extension candidates. Maximal degree in co-relation 64030. Up to 4676 conditions per place. [2024-06-14 12:21:18,609 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 488 selfloop transitions, 99 changer transitions 0/591 dead transitions. [2024-06-14 12:21:18,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 591 transitions, 9153 flow [2024-06-14 12:21:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:21:18,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 12:21:18,611 INFO L175 Difference]: Start difference. First operand has 385 places, 566 transitions, 7877 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:21:18,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 591 transitions, 9153 flow [2024-06-14 12:21:23,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 591 transitions, 8914 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:23,812 INFO L231 Difference]: Finished difference. Result has 389 places, 566 transitions, 7852 flow [2024-06-14 12:21:23,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7638, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7852, PETRI_PLACES=389, PETRI_TRANSITIONS=566} [2024-06-14 12:21:23,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-14 12:21:23,813 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 566 transitions, 7852 flow [2024-06-14 12:21:23,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:23,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:23,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:23,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:21:23,813 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:23,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:23,814 INFO L85 PathProgramCache]: Analyzing trace with hash -654085624, now seen corresponding path program 1 times [2024-06-14 12:21:23,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:23,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81054085] [2024-06-14 12:21:23,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:23,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:24,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:24,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81054085] [2024-06-14 12:21:24,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81054085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:24,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:24,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:24,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226673724] [2024-06-14 12:21:24,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:24,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:24,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:24,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:24,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:21:24,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 566 transitions, 7852 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:24,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:24,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:21:24,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:26,214 INFO L124 PetriNetUnfolderBase]: 3471/5327 cut-off events. [2024-06-14 12:21:26,214 INFO L125 PetriNetUnfolderBase]: For 1467534/1467541 co-relation queries the response was YES. [2024-06-14 12:21:26,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64646 conditions, 5327 events. 3471/5327 cut-off events. For 1467534/1467541 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29698 event pairs, 600 based on Foata normal form. 5/5328 useless extension candidates. Maximal degree in co-relation 64455. Up to 4702 conditions per place. [2024-06-14 12:21:26,303 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 493 selfloop transitions, 100 changer transitions 0/597 dead transitions. [2024-06-14 12:21:26,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 597 transitions, 9292 flow [2024-06-14 12:21:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:21:26,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 12:21:26,305 INFO L175 Difference]: Start difference. First operand has 389 places, 566 transitions, 7852 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:21:26,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 597 transitions, 9292 flow [2024-06-14 12:21:31,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 597 transitions, 9079 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:31,520 INFO L231 Difference]: Finished difference. Result has 391 places, 570 transitions, 7990 flow [2024-06-14 12:21:31,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7639, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7990, PETRI_PLACES=391, PETRI_TRANSITIONS=570} [2024-06-14 12:21:31,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-14 12:21:31,521 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 570 transitions, 7990 flow [2024-06-14 12:21:31,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:31,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:31,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:31,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:21:31,522 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:31,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 9030584, now seen corresponding path program 4 times [2024-06-14 12:21:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:31,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078423720] [2024-06-14 12:21:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:31,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:32,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:32,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078423720] [2024-06-14 12:21:32,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078423720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:32,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:32,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:32,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891824462] [2024-06-14 12:21:32,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:32,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:32,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:32,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:32,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:32,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:21:32,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 570 transitions, 7990 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:32,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:32,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:21:32,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:33,754 INFO L124 PetriNetUnfolderBase]: 3481/5362 cut-off events. [2024-06-14 12:21:33,754 INFO L125 PetriNetUnfolderBase]: For 1478562/1478569 co-relation queries the response was YES. [2024-06-14 12:21:33,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65541 conditions, 5362 events. 3481/5362 cut-off events. For 1478562/1478569 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 30096 event pairs, 604 based on Foata normal form. 3/5361 useless extension candidates. Maximal degree in co-relation 65349. Up to 4696 conditions per place. [2024-06-14 12:21:33,841 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 488 selfloop transitions, 103 changer transitions 0/595 dead transitions. [2024-06-14 12:21:33,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 595 transitions, 9368 flow [2024-06-14 12:21:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:21:33,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:21:33,843 INFO L175 Difference]: Start difference. First operand has 391 places, 570 transitions, 7990 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:21:33,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 595 transitions, 9368 flow [2024-06-14 12:21:40,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 595 transitions, 9045 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:40,695 INFO L231 Difference]: Finished difference. Result has 392 places, 573 transitions, 7982 flow [2024-06-14 12:21:40,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7667, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7982, PETRI_PLACES=392, PETRI_TRANSITIONS=573} [2024-06-14 12:21:40,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-14 12:21:40,696 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 573 transitions, 7982 flow [2024-06-14 12:21:40,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:40,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:40,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:40,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:21:40,697 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:40,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash 12750026, now seen corresponding path program 2 times [2024-06-14 12:21:40,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:40,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655559767] [2024-06-14 12:21:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:40,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:41,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:41,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655559767] [2024-06-14 12:21:41,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655559767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:41,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:41,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:41,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893244180] [2024-06-14 12:21:41,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:41,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:41,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:41,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:21:41,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 573 transitions, 7982 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:41,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:41,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:21:41,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:43,185 INFO L124 PetriNetUnfolderBase]: 3501/5382 cut-off events. [2024-06-14 12:21:43,185 INFO L125 PetriNetUnfolderBase]: For 1518701/1518708 co-relation queries the response was YES. [2024-06-14 12:21:43,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65849 conditions, 5382 events. 3501/5382 cut-off events. For 1518701/1518708 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 30129 event pairs, 603 based on Foata normal form. 5/5383 useless extension candidates. Maximal degree in co-relation 65656. Up to 4704 conditions per place. [2024-06-14 12:21:43,277 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 488 selfloop transitions, 109 changer transitions 0/601 dead transitions. [2024-06-14 12:21:43,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 601 transitions, 9436 flow [2024-06-14 12:21:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:43,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:21:43,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 12:21:43,278 INFO L175 Difference]: Start difference. First operand has 392 places, 573 transitions, 7982 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:21:43,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 601 transitions, 9436 flow [2024-06-14 12:21:50,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 601 transitions, 9157 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:50,212 INFO L231 Difference]: Finished difference. Result has 395 places, 577 transitions, 8080 flow [2024-06-14 12:21:50,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7703, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8080, PETRI_PLACES=395, PETRI_TRANSITIONS=577} [2024-06-14 12:21:50,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-14 12:21:50,218 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 577 transitions, 8080 flow [2024-06-14 12:21:50,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:50,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:50,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:50,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:21:50,218 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:50,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1974920900, now seen corresponding path program 5 times [2024-06-14 12:21:50,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:50,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693636192] [2024-06-14 12:21:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:50,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:51,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:51,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693636192] [2024-06-14 12:21:51,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693636192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:51,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:51,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:51,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624989736] [2024-06-14 12:21:51,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:51,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:51,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:51,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:21:51,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 577 transitions, 8080 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:51,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:51,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:21:51,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:52,628 INFO L124 PetriNetUnfolderBase]: 3527/5417 cut-off events. [2024-06-14 12:21:52,629 INFO L125 PetriNetUnfolderBase]: For 1547520/1547527 co-relation queries the response was YES. [2024-06-14 12:21:52,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67145 conditions, 5417 events. 3527/5417 cut-off events. For 1547520/1547527 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30322 event pairs, 638 based on Foata normal form. 3/5416 useless extension candidates. Maximal degree in co-relation 66951. Up to 4576 conditions per place. [2024-06-14 12:21:52,730 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 141 changer transitions 0/604 dead transitions. [2024-06-14 12:21:52,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 604 transitions, 10102 flow [2024-06-14 12:21:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:21:52,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:21:52,732 INFO L175 Difference]: Start difference. First operand has 395 places, 577 transitions, 8080 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:21:52,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 604 transitions, 10102 flow [2024-06-14 12:21:59,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 604 transitions, 9753 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:59,292 INFO L231 Difference]: Finished difference. Result has 396 places, 583 transitions, 8225 flow [2024-06-14 12:21:59,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7731, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8225, PETRI_PLACES=396, PETRI_TRANSITIONS=583} [2024-06-14 12:21:59,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-14 12:21:59,305 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 583 transitions, 8225 flow [2024-06-14 12:21:59,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:59,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:59,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:59,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:21:59,305 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:59,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:59,306 INFO L85 PathProgramCache]: Analyzing trace with hash 12755823, now seen corresponding path program 1 times [2024-06-14 12:21:59,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:59,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800391900] [2024-06-14 12:21:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:59,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:00,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:00,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800391900] [2024-06-14 12:22:00,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800391900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:00,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:00,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:00,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165827664] [2024-06-14 12:22:00,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:00,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:00,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:00,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:00,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:00,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:22:00,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 583 transitions, 8225 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:00,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:00,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:22:00,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:01,805 INFO L124 PetriNetUnfolderBase]: 3547/5442 cut-off events. [2024-06-14 12:22:01,805 INFO L125 PetriNetUnfolderBase]: For 1583349/1583359 co-relation queries the response was YES. [2024-06-14 12:22:01,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67488 conditions, 5442 events. 3547/5442 cut-off events. For 1583349/1583359 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 30505 event pairs, 594 based on Foata normal form. 9/5448 useless extension candidates. Maximal degree in co-relation 67293. Up to 5120 conditions per place. [2024-06-14 12:22:01,895 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 561 selfloop transitions, 46 changer transitions 0/611 dead transitions. [2024-06-14 12:22:01,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 611 transitions, 9696 flow [2024-06-14 12:22:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:22:01,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:22:01,896 INFO L175 Difference]: Start difference. First operand has 396 places, 583 transitions, 8225 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:22:01,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 611 transitions, 9696 flow [2024-06-14 12:22:08,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 611 transitions, 9427 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:08,257 INFO L231 Difference]: Finished difference. Result has 401 places, 589 transitions, 8229 flow [2024-06-14 12:22:08,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7956, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8229, PETRI_PLACES=401, PETRI_TRANSITIONS=589} [2024-06-14 12:22:08,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-14 12:22:08,258 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 589 transitions, 8229 flow [2024-06-14 12:22:08,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:08,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:08,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:08,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:22:08,258 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:08,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1009552108, now seen corresponding path program 6 times [2024-06-14 12:22:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:08,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535091935] [2024-06-14 12:22:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:08,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:09,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:09,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535091935] [2024-06-14 12:22:09,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535091935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:09,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:09,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:09,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21188772] [2024-06-14 12:22:09,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:09,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:09,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:09,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:09,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:22:09,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 589 transitions, 8229 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:09,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:09,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:22:09,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:10,601 INFO L124 PetriNetUnfolderBase]: 3541/5439 cut-off events. [2024-06-14 12:22:10,601 INFO L125 PetriNetUnfolderBase]: For 1572647/1572654 co-relation queries the response was YES. [2024-06-14 12:22:10,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66979 conditions, 5439 events. 3541/5439 cut-off events. For 1572647/1572654 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 30489 event pairs, 628 based on Foata normal form. 3/5438 useless extension candidates. Maximal degree in co-relation 66783. Up to 4599 conditions per place. [2024-06-14 12:22:10,694 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 459 selfloop transitions, 147 changer transitions 0/610 dead transitions. [2024-06-14 12:22:10,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 610 transitions, 10067 flow [2024-06-14 12:22:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:22:10,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 12:22:10,695 INFO L175 Difference]: Start difference. First operand has 401 places, 589 transitions, 8229 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:22:10,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 610 transitions, 10067 flow [2024-06-14 12:22:17,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 610 transitions, 9820 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:17,103 INFO L231 Difference]: Finished difference. Result has 402 places, 589 transitions, 8282 flow [2024-06-14 12:22:17,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7982, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8282, PETRI_PLACES=402, PETRI_TRANSITIONS=589} [2024-06-14 12:22:17,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-14 12:22:17,104 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 589 transitions, 8282 flow [2024-06-14 12:22:17,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:17,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:17,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:17,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:22:17,104 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:17,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash -53788144, now seen corresponding path program 3 times [2024-06-14 12:22:17,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:17,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507807413] [2024-06-14 12:22:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:17,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:18,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:18,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507807413] [2024-06-14 12:22:18,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507807413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:18,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:18,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:18,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737480684] [2024-06-14 12:22:18,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:18,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:18,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:18,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:18,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:18,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:22:18,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 589 transitions, 8282 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:18,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:18,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:22:18,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:19,700 INFO L124 PetriNetUnfolderBase]: 3561/5464 cut-off events. [2024-06-14 12:22:19,700 INFO L125 PetriNetUnfolderBase]: For 1614950/1614960 co-relation queries the response was YES. [2024-06-14 12:22:19,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67650 conditions, 5464 events. 3561/5464 cut-off events. For 1614950/1614960 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30625 event pairs, 595 based on Foata normal form. 9/5470 useless extension candidates. Maximal degree in co-relation 67453. Up to 5140 conditions per place. [2024-06-14 12:22:19,806 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 567 selfloop transitions, 44 changer transitions 0/615 dead transitions. [2024-06-14 12:22:19,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 615 transitions, 9736 flow [2024-06-14 12:22:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:22:19,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:22:19,807 INFO L175 Difference]: Start difference. First operand has 402 places, 589 transitions, 8282 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:22:19,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 615 transitions, 9736 flow [2024-06-14 12:22:26,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 615 transitions, 9175 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 12:22:26,510 INFO L231 Difference]: Finished difference. Result has 402 places, 593 transitions, 7976 flow [2024-06-14 12:22:26,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7721, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7976, PETRI_PLACES=402, PETRI_TRANSITIONS=593} [2024-06-14 12:22:26,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-14 12:22:26,511 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 593 transitions, 7976 flow [2024-06-14 12:22:26,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:26,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:26,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:26,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:22:26,512 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:26,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:26,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1208865647, now seen corresponding path program 2 times [2024-06-14 12:22:26,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:26,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043415516] [2024-06-14 12:22:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:26,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:27,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:27,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043415516] [2024-06-14 12:22:27,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043415516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:27,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:27,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:27,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62695738] [2024-06-14 12:22:27,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:27,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:27,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:27,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:27,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:27,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:22:27,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 593 transitions, 7976 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:27,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:27,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:22:27,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:28,991 INFO L124 PetriNetUnfolderBase]: 3581/5492 cut-off events. [2024-06-14 12:22:28,992 INFO L125 PetriNetUnfolderBase]: For 1638011/1638021 co-relation queries the response was YES. [2024-06-14 12:22:29,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67580 conditions, 5492 events. 3581/5492 cut-off events. For 1638011/1638021 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 30697 event pairs, 598 based on Foata normal form. 9/5498 useless extension candidates. Maximal degree in co-relation 67384. Up to 5130 conditions per place. [2024-06-14 12:22:29,088 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 558 selfloop transitions, 55 changer transitions 0/617 dead transitions. [2024-06-14 12:22:29,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 617 transitions, 9455 flow [2024-06-14 12:22:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:22:29,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 12:22:29,089 INFO L175 Difference]: Start difference. First operand has 402 places, 593 transitions, 7976 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:22:29,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 617 transitions, 9455 flow [2024-06-14 12:22:35,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 617 transitions, 9228 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:35,832 INFO L231 Difference]: Finished difference. Result has 404 places, 599 transitions, 8052 flow [2024-06-14 12:22:35,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7749, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8052, PETRI_PLACES=404, PETRI_TRANSITIONS=599} [2024-06-14 12:22:35,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-14 12:22:35,832 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 599 transitions, 8052 flow [2024-06-14 12:22:35,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:35,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:35,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:35,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:22:35,833 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:35,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1778283049, now seen corresponding path program 3 times [2024-06-14 12:22:35,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:35,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524642841] [2024-06-14 12:22:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:35,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:36,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:36,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524642841] [2024-06-14 12:22:36,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524642841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:36,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:36,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:36,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650081895] [2024-06-14 12:22:36,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:36,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:36,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:36,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:36,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:37,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:22:37,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 599 transitions, 8052 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:37,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:37,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:22:37,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:38,624 INFO L124 PetriNetUnfolderBase]: 3591/5504 cut-off events. [2024-06-14 12:22:38,624 INFO L125 PetriNetUnfolderBase]: For 1644692/1644702 co-relation queries the response was YES. [2024-06-14 12:22:38,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67715 conditions, 5504 events. 3591/5504 cut-off events. For 1644692/1644702 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 30835 event pairs, 591 based on Foata normal form. 7/5508 useless extension candidates. Maximal degree in co-relation 67518. Up to 5042 conditions per place. [2024-06-14 12:22:38,707 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 535 selfloop transitions, 88 changer transitions 0/627 dead transitions. [2024-06-14 12:22:38,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 627 transitions, 9884 flow [2024-06-14 12:22:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:22:38,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:22:38,709 INFO L175 Difference]: Start difference. First operand has 404 places, 599 transitions, 8052 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:22:38,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 627 transitions, 9884 flow [2024-06-14 12:22:44,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 627 transitions, 9644 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:44,402 INFO L231 Difference]: Finished difference. Result has 407 places, 606 transitions, 8238 flow [2024-06-14 12:22:44,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7837, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8238, PETRI_PLACES=407, PETRI_TRANSITIONS=606} [2024-06-14 12:22:44,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-14 12:22:44,402 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 606 transitions, 8238 flow [2024-06-14 12:22:44,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:44,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:44,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:44,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:22:44,403 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:44,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:44,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1149673330, now seen corresponding path program 4 times [2024-06-14 12:22:44,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:44,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83876178] [2024-06-14 12:22:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:44,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:45,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:45,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83876178] [2024-06-14 12:22:45,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83876178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:45,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:45,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:45,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049210862] [2024-06-14 12:22:45,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:45,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:45,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:45,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:22:45,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 606 transitions, 8238 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:45,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:45,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:22:45,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:46,987 INFO L124 PetriNetUnfolderBase]: 3643/5578 cut-off events. [2024-06-14 12:22:46,988 INFO L125 PetriNetUnfolderBase]: For 1729443/1729453 co-relation queries the response was YES. [2024-06-14 12:22:47,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69568 conditions, 5578 events. 3643/5578 cut-off events. For 1729443/1729453 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31214 event pairs, 595 based on Foata normal form. 9/5584 useless extension candidates. Maximal degree in co-relation 69369. Up to 5118 conditions per place. [2024-06-14 12:22:47,084 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 559 selfloop transitions, 71 changer transitions 0/634 dead transitions. [2024-06-14 12:22:47,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 634 transitions, 10168 flow [2024-06-14 12:22:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:22:47,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 12:22:47,086 INFO L175 Difference]: Start difference. First operand has 407 places, 606 transitions, 8238 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:22:47,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 634 transitions, 10168 flow [2024-06-14 12:22:53,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 634 transitions, 9768 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-14 12:22:53,241 INFO L231 Difference]: Finished difference. Result has 407 places, 613 transitions, 8259 flow [2024-06-14 12:22:53,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7838, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8259, PETRI_PLACES=407, PETRI_TRANSITIONS=613} [2024-06-14 12:22:53,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-14 12:22:53,241 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 613 transitions, 8259 flow [2024-06-14 12:22:53,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:53,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:53,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:53,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:22:53,242 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:53,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1142316100, now seen corresponding path program 5 times [2024-06-14 12:22:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:53,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652944400] [2024-06-14 12:22:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:53,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:54,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:54,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652944400] [2024-06-14 12:22:54,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652944400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:54,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:54,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:54,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112437120] [2024-06-14 12:22:54,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:54,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:54,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:54,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:54,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:54,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:22:54,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 613 transitions, 8259 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:54,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:54,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:22:54,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:56,059 INFO L124 PetriNetUnfolderBase]: 3727/5697 cut-off events. [2024-06-14 12:22:56,059 INFO L125 PetriNetUnfolderBase]: For 1837201/1837208 co-relation queries the response was YES. [2024-06-14 12:22:56,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72631 conditions, 5697 events. 3727/5697 cut-off events. For 1837201/1837208 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 31880 event pairs, 647 based on Foata normal form. 5/5698 useless extension candidates. Maximal degree in co-relation 72433. Up to 4586 conditions per place. [2024-06-14 12:22:56,164 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 167 changer transitions 0/647 dead transitions. [2024-06-14 12:22:56,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 647 transitions, 10697 flow [2024-06-14 12:22:56,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:22:56,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:22:56,166 INFO L175 Difference]: Start difference. First operand has 407 places, 613 transitions, 8259 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:22:56,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 647 transitions, 10697 flow [2024-06-14 12:23:02,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 647 transitions, 10440 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:02,139 INFO L231 Difference]: Finished difference. Result has 412 places, 624 transitions, 8814 flow [2024-06-14 12:23:02,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8024, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8814, PETRI_PLACES=412, PETRI_TRANSITIONS=624} [2024-06-14 12:23:02,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-14 12:23:02,140 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 624 transitions, 8814 flow [2024-06-14 12:23:02,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:02,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:02,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:02,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:23:02,141 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:02,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:02,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1208865430, now seen corresponding path program 6 times [2024-06-14 12:23:02,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:02,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427557190] [2024-06-14 12:23:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:02,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:03,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427557190] [2024-06-14 12:23:03,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427557190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:03,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:03,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865773722] [2024-06-14 12:23:03,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:03,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:03,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:03,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:03,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:23:03,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 624 transitions, 8814 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:03,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:03,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:23:03,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:04,788 INFO L124 PetriNetUnfolderBase]: 3715/5688 cut-off events. [2024-06-14 12:23:04,789 INFO L125 PetriNetUnfolderBase]: For 1830780/1830790 co-relation queries the response was YES. [2024-06-14 12:23:04,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72864 conditions, 5688 events. 3715/5688 cut-off events. For 1830780/1830790 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31949 event pairs, 593 based on Foata normal form. 9/5694 useless extension candidates. Maximal degree in co-relation 72663. Up to 5316 conditions per place. [2024-06-14 12:23:04,895 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 585 selfloop transitions, 53 changer transitions 0/642 dead transitions. [2024-06-14 12:23:04,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 642 transitions, 10154 flow [2024-06-14 12:23:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:23:04,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 12:23:04,897 INFO L175 Difference]: Start difference. First operand has 412 places, 624 transitions, 8814 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:23:04,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 642 transitions, 10154 flow [2024-06-14 12:23:10,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 642 transitions, 9746 flow, removed 153 selfloop flow, removed 4 redundant places. [2024-06-14 12:23:10,639 INFO L231 Difference]: Finished difference. Result has 417 places, 624 transitions, 8519 flow [2024-06-14 12:23:10,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8406, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8519, PETRI_PLACES=417, PETRI_TRANSITIONS=624} [2024-06-14 12:23:10,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-14 12:23:10,652 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 624 transitions, 8519 flow [2024-06-14 12:23:10,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:10,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:10,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:10,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:23:10,653 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:10,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:10,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1149673547, now seen corresponding path program 4 times [2024-06-14 12:23:10,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:10,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350669192] [2024-06-14 12:23:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:10,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:11,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:11,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350669192] [2024-06-14 12:23:11,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350669192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:11,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:11,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:11,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999558572] [2024-06-14 12:23:11,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:11,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:11,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:11,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:11,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:23:11,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 624 transitions, 8519 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:11,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:11,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:23:11,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:13,526 INFO L124 PetriNetUnfolderBase]: 3717/5681 cut-off events. [2024-06-14 12:23:13,526 INFO L125 PetriNetUnfolderBase]: For 1814582/1814592 co-relation queries the response was YES. [2024-06-14 12:23:13,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72058 conditions, 5681 events. 3717/5681 cut-off events. For 1814582/1814592 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31817 event pairs, 602 based on Foata normal form. 7/5685 useless extension candidates. Maximal degree in co-relation 71855. Up to 5215 conditions per place. [2024-06-14 12:23:13,625 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 555 selfloop transitions, 89 changer transitions 0/648 dead transitions. [2024-06-14 12:23:13,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 648 transitions, 10311 flow [2024-06-14 12:23:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:23:13,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 12:23:13,626 INFO L175 Difference]: Start difference. First operand has 417 places, 624 transitions, 8519 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:23:13,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 648 transitions, 10311 flow [2024-06-14 12:23:20,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 648 transitions, 10189 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:23:20,194 INFO L231 Difference]: Finished difference. Result has 418 places, 627 transitions, 8692 flow [2024-06-14 12:23:20,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8397, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8692, PETRI_PLACES=418, PETRI_TRANSITIONS=627} [2024-06-14 12:23:20,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-14 12:23:20,194 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 627 transitions, 8692 flow [2024-06-14 12:23:20,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:20,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:20,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:20,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:23:20,195 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:20,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:20,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1789715198, now seen corresponding path program 4 times [2024-06-14 12:23:20,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:20,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83591527] [2024-06-14 12:23:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:20,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:21,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:21,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83591527] [2024-06-14 12:23:21,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83591527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:21,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:21,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:21,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27836433] [2024-06-14 12:23:21,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:21,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:21,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:21,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:23:21,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 627 transitions, 8692 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:21,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:21,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:23:21,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:23,119 INFO L124 PetriNetUnfolderBase]: 3733/5707 cut-off events. [2024-06-14 12:23:23,119 INFO L125 PetriNetUnfolderBase]: For 1863867/1863877 co-relation queries the response was YES. [2024-06-14 12:23:23,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72774 conditions, 5707 events. 3733/5707 cut-off events. For 1863867/1863877 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 32006 event pairs, 606 based on Foata normal form. 9/5713 useless extension candidates. Maximal degree in co-relation 72570. Up to 5343 conditions per place. [2024-06-14 12:23:23,238 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 591 selfloop transitions, 53 changer transitions 0/648 dead transitions. [2024-06-14 12:23:23,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 648 transitions, 10196 flow [2024-06-14 12:23:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:23:23,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:23:23,240 INFO L175 Difference]: Start difference. First operand has 418 places, 627 transitions, 8692 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:23:23,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 648 transitions, 10196 flow [2024-06-14 12:23:30,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 648 transitions, 9966 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:30,434 INFO L231 Difference]: Finished difference. Result has 421 places, 630 transitions, 8744 flow [2024-06-14 12:23:30,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8462, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8744, PETRI_PLACES=421, PETRI_TRANSITIONS=630} [2024-06-14 12:23:30,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-14 12:23:30,435 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 630 transitions, 8744 flow [2024-06-14 12:23:30,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:30,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:30,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:30,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:23:30,435 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:30,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:30,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1138499008, now seen corresponding path program 5 times [2024-06-14 12:23:30,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:30,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589435100] [2024-06-14 12:23:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:30,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:31,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:31,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589435100] [2024-06-14 12:23:31,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589435100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:31,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:31,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200103845] [2024-06-14 12:23:31,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:31,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:31,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:31,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:31,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:31,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:23:31,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 630 transitions, 8744 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:31,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:31,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:23:31,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:33,101 INFO L124 PetriNetUnfolderBase]: 3749/5731 cut-off events. [2024-06-14 12:23:33,102 INFO L125 PetriNetUnfolderBase]: For 1895979/1895989 co-relation queries the response was YES. [2024-06-14 12:23:33,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73365 conditions, 5731 events. 3749/5731 cut-off events. For 1895979/1895989 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32182 event pairs, 604 based on Foata normal form. 9/5737 useless extension candidates. Maximal degree in co-relation 73160. Up to 5357 conditions per place. [2024-06-14 12:23:33,378 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 596 selfloop transitions, 52 changer transitions 0/652 dead transitions. [2024-06-14 12:23:33,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 652 transitions, 10264 flow [2024-06-14 12:23:33,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:23:33,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:23:33,380 INFO L175 Difference]: Start difference. First operand has 421 places, 630 transitions, 8744 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:23:33,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 652 transitions, 10264 flow [2024-06-14 12:23:40,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 652 transitions, 10004 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:40,175 INFO L231 Difference]: Finished difference. Result has 423 places, 633 transitions, 8770 flow [2024-06-14 12:23:40,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8484, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8770, PETRI_PLACES=423, PETRI_TRANSITIONS=633} [2024-06-14 12:23:40,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-14 12:23:40,175 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 633 transitions, 8770 flow [2024-06-14 12:23:40,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:40,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:40,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:40,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:23:40,176 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:40,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:40,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1149550198, now seen corresponding path program 6 times [2024-06-14 12:23:40,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:40,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794000327] [2024-06-14 12:23:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:40,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:41,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794000327] [2024-06-14 12:23:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794000327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:41,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:41,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:41,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182945426] [2024-06-14 12:23:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:41,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:41,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:41,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:23:41,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 633 transitions, 8770 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:41,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:41,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:23:41,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:43,167 INFO L124 PetriNetUnfolderBase]: 3765/5755 cut-off events. [2024-06-14 12:23:43,167 INFO L125 PetriNetUnfolderBase]: For 1923406/1923416 co-relation queries the response was YES. [2024-06-14 12:23:43,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73855 conditions, 5755 events. 3765/5755 cut-off events. For 1923406/1923416 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32334 event pairs, 608 based on Foata normal form. 9/5761 useless extension candidates. Maximal degree in co-relation 73649. Up to 5345 conditions per place. [2024-06-14 12:23:43,273 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 579 selfloop transitions, 71 changer transitions 0/654 dead transitions. [2024-06-14 12:23:43,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 654 transitions, 10298 flow [2024-06-14 12:23:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:23:43,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 12:23:43,274 INFO L175 Difference]: Start difference. First operand has 423 places, 633 transitions, 8770 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:23:43,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 654 transitions, 10298 flow [2024-06-14 12:23:51,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 654 transitions, 10034 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:51,120 INFO L231 Difference]: Finished difference. Result has 425 places, 636 transitions, 8836 flow [2024-06-14 12:23:51,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8506, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8836, PETRI_PLACES=425, PETRI_TRANSITIONS=636} [2024-06-14 12:23:51,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-14 12:23:51,120 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 636 transitions, 8836 flow [2024-06-14 12:23:51,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:51,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:51,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:51,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:23:51,121 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:51,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1216494127, now seen corresponding path program 1 times [2024-06-14 12:23:51,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:51,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300330202] [2024-06-14 12:23:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:51,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:52,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:52,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300330202] [2024-06-14 12:23:52,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300330202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:52,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:52,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:23:52,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453989492] [2024-06-14 12:23:52,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:52,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:23:52,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:23:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:23:52,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:23:52,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 636 transitions, 8836 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:23:52,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:52,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:23:52,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:54,589 INFO L124 PetriNetUnfolderBase]: 3773/5771 cut-off events. [2024-06-14 12:23:54,589 INFO L125 PetriNetUnfolderBase]: For 1930817/1930823 co-relation queries the response was YES. [2024-06-14 12:23:54,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74257 conditions, 5771 events. 3773/5771 cut-off events. For 1930817/1930823 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32462 event pairs, 621 based on Foata normal form. 8/5777 useless extension candidates. Maximal degree in co-relation 74050. Up to 5568 conditions per place. [2024-06-14 12:23:54,684 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 630 selfloop transitions, 23 changer transitions 0/657 dead transitions. [2024-06-14 12:23:54,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 657 transitions, 10355 flow [2024-06-14 12:23:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 12:23:54,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-14 12:23:54,686 INFO L175 Difference]: Start difference. First operand has 425 places, 636 transitions, 8836 flow. Second operand 9 states and 137 transitions. [2024-06-14 12:23:54,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 657 transitions, 10355 flow [2024-06-14 12:24:02,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 657 transitions, 10047 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:02,331 INFO L231 Difference]: Finished difference. Result has 427 places, 638 transitions, 8735 flow [2024-06-14 12:24:02,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8528, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8735, PETRI_PLACES=427, PETRI_TRANSITIONS=638} [2024-06-14 12:24:02,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-14 12:24:02,331 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 638 transitions, 8735 flow [2024-06-14 12:24:02,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:24:02,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:02,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:02,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:24:02,332 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:02,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1205381092, now seen corresponding path program 1 times [2024-06-14 12:24:02,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:02,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123109471] [2024-06-14 12:24:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:03,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:03,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123109471] [2024-06-14 12:24:03,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123109471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:03,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:03,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:24:03,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413133635] [2024-06-14 12:24:03,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:03,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:24:03,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:03,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:24:03,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:24:03,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:24:03,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 638 transitions, 8735 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-14 12:24:03,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:03,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:24:03,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:05,172 INFO L124 PetriNetUnfolderBase]: 3775/5770 cut-off events. [2024-06-14 12:24:05,172 INFO L125 PetriNetUnfolderBase]: For 1942129/1942139 co-relation queries the response was YES. [2024-06-14 12:24:05,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73867 conditions, 5770 events. 3775/5770 cut-off events. For 1942129/1942139 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32436 event pairs, 608 based on Foata normal form. 7/5774 useless extension candidates. Maximal degree in co-relation 73659. Up to 5406 conditions per place. [2024-06-14 12:24:05,272 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 598 selfloop transitions, 57 changer transitions 0/659 dead transitions. [2024-06-14 12:24:05,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 659 transitions, 10267 flow [2024-06-14 12:24:05,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:24:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:24:05,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:24:05,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 12:24:05,274 INFO L175 Difference]: Start difference. First operand has 427 places, 638 transitions, 8735 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:24:05,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 659 transitions, 10267 flow [2024-06-14 12:24:11,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 659 transitions, 10076 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:11,566 INFO L231 Difference]: Finished difference. Result has 429 places, 642 transitions, 8848 flow [2024-06-14 12:24:11,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8544, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8848, PETRI_PLACES=429, PETRI_TRANSITIONS=642} [2024-06-14 12:24:11,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-14 12:24:11,567 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 642 transitions, 8848 flow [2024-06-14 12:24:11,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-14 12:24:11,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:11,567 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] [2024-06-14 12:24:11,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:24:11,567 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:11,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1960172574, now seen corresponding path program 7 times [2024-06-14 12:24:11,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:11,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371738251] [2024-06-14 12:24:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:11,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:12,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:12,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371738251] [2024-06-14 12:24:12,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371738251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:12,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:12,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:12,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62952067] [2024-06-14 12:24:12,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:12,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:12,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:12,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:12,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:12,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:24:12,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 642 transitions, 8848 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:12,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:12,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:24:12,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:13,930 INFO L124 PetriNetUnfolderBase]: 3777/5780 cut-off events. [2024-06-14 12:24:13,931 INFO L125 PetriNetUnfolderBase]: For 1955781/1955795 co-relation queries the response was YES. [2024-06-14 12:24:14,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73901 conditions, 5780 events. 3777/5780 cut-off events. For 1955781/1955795 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 32596 event pairs, 659 based on Foata normal form. 8/5771 useless extension candidates. Maximal degree in co-relation 73692. Up to 5163 conditions per place. [2024-06-14 12:24:14,037 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 571 selfloop transitions, 96 changer transitions 0/671 dead transitions. [2024-06-14 12:24:14,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 671 transitions, 10435 flow [2024-06-14 12:24:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:24:14,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:24:14,038 INFO L175 Difference]: Start difference. First operand has 429 places, 642 transitions, 8848 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:24:14,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 671 transitions, 10435 flow [2024-06-14 12:24:20,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 671 transitions, 10187 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:20,723 INFO L231 Difference]: Finished difference. Result has 431 places, 650 transitions, 8986 flow [2024-06-14 12:24:20,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8600, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8986, PETRI_PLACES=431, PETRI_TRANSITIONS=650} [2024-06-14 12:24:20,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-14 12:24:20,723 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 650 transitions, 8986 flow [2024-06-14 12:24:20,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:20,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:20,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:20,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:24:20,724 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:20,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:20,725 INFO L85 PathProgramCache]: Analyzing trace with hash 918450443, now seen corresponding path program 2 times [2024-06-14 12:24:20,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:20,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580708475] [2024-06-14 12:24:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:20,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:21,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:21,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580708475] [2024-06-14 12:24:21,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580708475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:21,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:21,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:24:21,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002453749] [2024-06-14 12:24:21,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:21,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:24:21,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:24:21,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:24:21,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:24:21,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 650 transitions, 8986 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:21,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:21,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:24:21,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:23,652 INFO L124 PetriNetUnfolderBase]: 3782/5770 cut-off events. [2024-06-14 12:24:23,652 INFO L125 PetriNetUnfolderBase]: For 1970304/1970312 co-relation queries the response was YES. [2024-06-14 12:24:23,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74548 conditions, 5770 events. 3782/5770 cut-off events. For 1970304/1970312 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 32380 event pairs, 625 based on Foata normal form. 3/5753 useless extension candidates. Maximal degree in co-relation 74337. Up to 5165 conditions per place. [2024-06-14 12:24:23,750 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 564 selfloop transitions, 107 changer transitions 0/675 dead transitions. [2024-06-14 12:24:23,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 675 transitions, 10512 flow [2024-06-14 12:24:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:24:23,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:24:23,751 INFO L175 Difference]: Start difference. First operand has 431 places, 650 transitions, 8986 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:24:23,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 675 transitions, 10512 flow [2024-06-14 12:24:30,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 675 transitions, 10316 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:30,229 INFO L231 Difference]: Finished difference. Result has 435 places, 653 transitions, 9120 flow [2024-06-14 12:24:30,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8790, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9120, PETRI_PLACES=435, PETRI_TRANSITIONS=653} [2024-06-14 12:24:30,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-14 12:24:30,230 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 653 transitions, 9120 flow [2024-06-14 12:24:30,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:30,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:30,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:30,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:24:30,231 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:30,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:30,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1390599081, now seen corresponding path program 3 times [2024-06-14 12:24:30,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:30,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188466372] [2024-06-14 12:24:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:30,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:31,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188466372] [2024-06-14 12:24:31,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188466372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:31,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:31,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:24:31,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696686982] [2024-06-14 12:24:31,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:31,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:24:31,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:24:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:24:31,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:24:31,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 653 transitions, 9120 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:31,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:31,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:24:31,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:32,952 INFO L124 PetriNetUnfolderBase]: 3779/5764 cut-off events. [2024-06-14 12:24:32,952 INFO L125 PetriNetUnfolderBase]: For 1984981/1984989 co-relation queries the response was YES. [2024-06-14 12:24:33,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74494 conditions, 5764 events. 3779/5764 cut-off events. For 1984981/1984989 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 32351 event pairs, 609 based on Foata normal form. 3/5747 useless extension candidates. Maximal degree in co-relation 74281. Up to 5093 conditions per place. [2024-06-14 12:24:33,059 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 539 selfloop transitions, 131 changer transitions 0/674 dead transitions. [2024-06-14 12:24:33,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 674 transitions, 10844 flow [2024-06-14 12:24:33,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:33,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:24:33,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:24:33,061 INFO L175 Difference]: Start difference. First operand has 435 places, 653 transitions, 9120 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:24:33,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 674 transitions, 10844 flow [2024-06-14 12:24:40,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 674 transitions, 10504 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:40,078 INFO L231 Difference]: Finished difference. Result has 437 places, 653 transitions, 9054 flow [2024-06-14 12:24:40,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8782, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9054, PETRI_PLACES=437, PETRI_TRANSITIONS=653} [2024-06-14 12:24:40,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-14 12:24:40,078 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 653 transitions, 9054 flow [2024-06-14 12:24:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:40,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:40,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:40,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:24:40,079 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)] === [2024-06-14 12:24:40,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1349828344, now seen corresponding path program 8 times [2024-06-14 12:24:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:40,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898575252] [2024-06-14 12:24:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:40,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:40,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:40,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898575252] [2024-06-14 12:24:40,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898575252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:40,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:40,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:40,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132928863] [2024-06-14 12:24:40,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:40,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:40,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:40,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:40,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:24:40,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 653 transitions, 9054 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:40,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:40,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:24:40,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:42,545 INFO L124 PetriNetUnfolderBase]: 3781/5788 cut-off events. [2024-06-14 12:24:42,545 INFO L125 PetriNetUnfolderBase]: For 1986465/1986479 co-relation queries the response was YES. [2024-06-14 12:24:42,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74385 conditions, 5788 events. 3781/5788 cut-off events. For 1986465/1986479 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32663 event pairs, 661 based on Foata normal form. 8/5779 useless extension candidates. Maximal degree in co-relation 74171. Up to 5153 conditions per place. [2024-06-14 12:24:42,656 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 570 selfloop transitions, 101 changer transitions 0/675 dead transitions. [2024-06-14 12:24:42,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 675 transitions, 10575 flow [2024-06-14 12:24:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:24:42,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:24:42,657 INFO L175 Difference]: Start difference. First operand has 437 places, 653 transitions, 9054 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:24:42,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 675 transitions, 10575 flow [2024-06-14 12:24:50,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 675 transitions, 10233 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 12:24:50,259 INFO L231 Difference]: Finished difference. Result has 436 places, 656 transitions, 9019 flow [2024-06-14 12:24:50,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8712, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9019, PETRI_PLACES=436, PETRI_TRANSITIONS=656} [2024-06-14 12:24:50,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-14 12:24:50,259 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 656 transitions, 9019 flow [2024-06-14 12:24:50,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:50,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:50,260 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] [2024-06-14 12:24:50,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:24:50,260 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)] === [2024-06-14 12:24:50,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1960183176, now seen corresponding path program 7 times [2024-06-14 12:24:50,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:50,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054845723] [2024-06-14 12:24:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:50,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:51,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:51,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054845723] [2024-06-14 12:24:51,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054845723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:51,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:51,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:24:51,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364167113] [2024-06-14 12:24:51,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:51,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:24:51,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:51,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:24:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:24:51,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:24:51,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 656 transitions, 9019 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:51,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:51,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:24:51,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:53,092 INFO L124 PetriNetUnfolderBase]: 3791/5788 cut-off events. [2024-06-14 12:24:53,092 INFO L125 PetriNetUnfolderBase]: For 2013169/2013177 co-relation queries the response was YES. [2024-06-14 12:24:53,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74630 conditions, 5788 events. 3791/5788 cut-off events. For 2013169/2013177 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32547 event pairs, 630 based on Foata normal form. 4/5772 useless extension candidates. Maximal degree in co-relation 74417. Up to 5175 conditions per place. [2024-06-14 12:24:53,191 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 569 selfloop transitions, 110 changer transitions 0/683 dead transitions. [2024-06-14 12:24:53,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 683 transitions, 10607 flow [2024-06-14 12:24:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:24:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:24:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:24:53,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:24:53,193 INFO L175 Difference]: Start difference. First operand has 436 places, 656 transitions, 9019 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:24:53,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 683 transitions, 10607 flow [2024-06-14 12:24:59,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 683 transitions, 10341 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:59,852 INFO L231 Difference]: Finished difference. Result has 439 places, 659 transitions, 9111 flow [2024-06-14 12:24:59,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8753, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9111, PETRI_PLACES=439, PETRI_TRANSITIONS=659} [2024-06-14 12:24:59,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 12:24:59,853 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 659 transitions, 9111 flow [2024-06-14 12:24:59,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:59,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:59,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:24:59,853 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)] === [2024-06-14 12:24:59,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1477439846, now seen corresponding path program 8 times [2024-06-14 12:24:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068963481] [2024-06-14 12:24:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:00,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:00,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068963481] [2024-06-14 12:25:00,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068963481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:00,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:00,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:00,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986880126] [2024-06-14 12:25:00,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:00,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:00,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:00,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:00,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:00,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:25:00,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 659 transitions, 9111 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:00,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:00,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:25:00,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:02,592 INFO L124 PetriNetUnfolderBase]: 3833/5840 cut-off events. [2024-06-14 12:25:02,592 INFO L125 PetriNetUnfolderBase]: For 2090200/2090208 co-relation queries the response was YES. [2024-06-14 12:25:02,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76535 conditions, 5840 events. 3833/5840 cut-off events. For 2090200/2090208 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 32792 event pairs, 622 based on Foata normal form. 4/5827 useless extension candidates. Maximal degree in co-relation 76321. Up to 5137 conditions per place. [2024-06-14 12:25:02,706 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 553 selfloop transitions, 135 changer transitions 0/692 dead transitions. [2024-06-14 12:25:02,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 692 transitions, 11257 flow [2024-06-14 12:25:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:25:02,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 12:25:02,707 INFO L175 Difference]: Start difference. First operand has 439 places, 659 transitions, 9111 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:25:02,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 692 transitions, 11257 flow [2024-06-14 12:25:10,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 692 transitions, 10925 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-14 12:25:10,175 INFO L231 Difference]: Finished difference. Result has 442 places, 669 transitions, 9452 flow [2024-06-14 12:25:10,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8779, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9452, PETRI_PLACES=442, PETRI_TRANSITIONS=669} [2024-06-14 12:25:10,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-14 12:25:10,176 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 669 transitions, 9452 flow [2024-06-14 12:25:10,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:10,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:10,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:10,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:25:10,177 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)] === [2024-06-14 12:25:10,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:10,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1704091384, now seen corresponding path program 9 times [2024-06-14 12:25:10,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:10,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708649185] [2024-06-14 12:25:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:10,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:10,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:10,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708649185] [2024-06-14 12:25:10,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708649185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:10,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:10,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:10,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541776082] [2024-06-14 12:25:10,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:11,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:25:11,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 669 transitions, 9452 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:11,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:11,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:25:11,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:12,675 INFO L124 PetriNetUnfolderBase]: 3843/5878 cut-off events. [2024-06-14 12:25:12,675 INFO L125 PetriNetUnfolderBase]: For 2122750/2122764 co-relation queries the response was YES. [2024-06-14 12:25:12,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77258 conditions, 5878 events. 3843/5878 cut-off events. For 2122750/2122764 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33246 event pairs, 660 based on Foata normal form. 8/5869 useless extension candidates. Maximal degree in co-relation 77042. Up to 5161 conditions per place. [2024-06-14 12:25:12,789 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 563 selfloop transitions, 122 changer transitions 0/689 dead transitions. [2024-06-14 12:25:12,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 689 transitions, 10994 flow [2024-06-14 12:25:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:25:12,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:25:12,791 INFO L175 Difference]: Start difference. First operand has 442 places, 669 transitions, 9452 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:25:12,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 689 transitions, 10994 flow [2024-06-14 12:25:19,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 689 transitions, 10655 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-14 12:25:19,311 INFO L231 Difference]: Finished difference. Result has 445 places, 672 transitions, 9451 flow [2024-06-14 12:25:19,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9113, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9451, PETRI_PLACES=445, PETRI_TRANSITIONS=672} [2024-06-14 12:25:19,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-14 12:25:19,312 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 672 transitions, 9451 flow [2024-06-14 12:25:19,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:19,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:19,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:19,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:25:19,312 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)] === [2024-06-14 12:25:19,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:19,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1980521080, now seen corresponding path program 9 times [2024-06-14 12:25:19,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:19,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319730504] [2024-06-14 12:25:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:19,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:20,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:20,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319730504] [2024-06-14 12:25:20,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319730504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:20,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:20,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:20,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347812262] [2024-06-14 12:25:20,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:20,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:20,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:20,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:20,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:25:20,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 672 transitions, 9451 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:20,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:20,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:25:20,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:22,181 INFO L124 PetriNetUnfolderBase]: 3837/5846 cut-off events. [2024-06-14 12:25:22,182 INFO L125 PetriNetUnfolderBase]: For 2121755/2121763 co-relation queries the response was YES. [2024-06-14 12:25:22,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76909 conditions, 5846 events. 3837/5846 cut-off events. For 2121755/2121763 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32855 event pairs, 625 based on Foata normal form. 4/5833 useless extension candidates. Maximal degree in co-relation 76691. Up to 5197 conditions per place. [2024-06-14 12:25:22,286 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 570 selfloop transitions, 122 changer transitions 0/696 dead transitions. [2024-06-14 12:25:22,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 696 transitions, 11023 flow [2024-06-14 12:25:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:25:22,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:25:22,287 INFO L175 Difference]: Start difference. First operand has 445 places, 672 transitions, 9451 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:25:22,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 696 transitions, 11023 flow [2024-06-14 12:25:29,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 696 transitions, 10719 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:25:29,735 INFO L231 Difference]: Finished difference. Result has 448 places, 674 transitions, 9481 flow [2024-06-14 12:25:29,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9147, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9481, PETRI_PLACES=448, PETRI_TRANSITIONS=674} [2024-06-14 12:25:29,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-14 12:25:29,736 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 674 transitions, 9481 flow [2024-06-14 12:25:29,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:29,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:29,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:29,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:25:29,736 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)] === [2024-06-14 12:25:29,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:29,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1420230003, now seen corresponding path program 4 times [2024-06-14 12:25:29,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:29,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877816738] [2024-06-14 12:25:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:29,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:30,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:30,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877816738] [2024-06-14 12:25:30,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877816738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:30,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:30,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:30,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169510085] [2024-06-14 12:25:30,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:30,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:30,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:30,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:30,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:30,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:25:30,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 674 transitions, 9481 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:30,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:30,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:25:30,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:32,490 INFO L124 PetriNetUnfolderBase]: 3834/5851 cut-off events. [2024-06-14 12:25:32,490 INFO L125 PetriNetUnfolderBase]: For 2126790/2126798 co-relation queries the response was YES. [2024-06-14 12:25:32,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76837 conditions, 5851 events. 3834/5851 cut-off events. For 2126790/2126798 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 32971 event pairs, 646 based on Foata normal form. 3/5835 useless extension candidates. Maximal degree in co-relation 76618. Up to 5238 conditions per place. [2024-06-14 12:25:32,598 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 586 selfloop transitions, 105 changer transitions 0/695 dead transitions. [2024-06-14 12:25:32,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 695 transitions, 10945 flow [2024-06-14 12:25:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:25:32,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:25:32,600 INFO L175 Difference]: Start difference. First operand has 448 places, 674 transitions, 9481 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:25:32,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 695 transitions, 10945 flow [2024-06-14 12:25:41,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 695 transitions, 10555 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-14 12:25:41,279 INFO L231 Difference]: Finished difference. Result has 449 places, 674 transitions, 9313 flow [2024-06-14 12:25:41,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9091, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9313, PETRI_PLACES=449, PETRI_TRANSITIONS=674} [2024-06-14 12:25:41,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-14 12:25:41,280 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 674 transitions, 9313 flow [2024-06-14 12:25:41,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:41,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:41,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:41,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:25:41,280 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)] === [2024-06-14 12:25:41,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:41,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1647207258, now seen corresponding path program 10 times [2024-06-14 12:25:41,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:41,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790441763] [2024-06-14 12:25:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:41,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:42,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:42,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790441763] [2024-06-14 12:25:42,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790441763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:42,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:42,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:42,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286421293] [2024-06-14 12:25:42,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:42,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:42,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:42,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:42,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:42,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:25:42,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 674 transitions, 9313 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:42,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:42,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:25:42,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:44,181 INFO L124 PetriNetUnfolderBase]: 3828/5842 cut-off events. [2024-06-14 12:25:44,181 INFO L125 PetriNetUnfolderBase]: For 2139914/2139922 co-relation queries the response was YES. [2024-06-14 12:25:44,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76282 conditions, 5842 events. 3828/5842 cut-off events. For 2139914/2139922 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32898 event pairs, 656 based on Foata normal form. 4/5829 useless extension candidates. Maximal degree in co-relation 76062. Up to 5227 conditions per place. [2024-06-14 12:25:44,280 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 587 selfloop transitions, 106 changer transitions 0/697 dead transitions. [2024-06-14 12:25:44,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 697 transitions, 10799 flow [2024-06-14 12:25:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:25:44,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:25:44,282 INFO L175 Difference]: Start difference. First operand has 449 places, 674 transitions, 9313 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:25:44,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 697 transitions, 10799 flow [2024-06-14 12:25:52,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 697 transitions, 10430 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-14 12:25:52,751 INFO L231 Difference]: Finished difference. Result has 450 places, 674 transitions, 9162 flow [2024-06-14 12:25:52,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9162, PETRI_PLACES=450, PETRI_TRANSITIONS=674} [2024-06-14 12:25:52,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-14 12:25:52,752 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 674 transitions, 9162 flow [2024-06-14 12:25:52,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:52,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:52,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:52,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:25:52,752 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)] === [2024-06-14 12:25:52,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1643488188, now seen corresponding path program 11 times [2024-06-14 12:25:52,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:52,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779243772] [2024-06-14 12:25:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:52,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:53,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:53,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779243772] [2024-06-14 12:25:53,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779243772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:53,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:53,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:53,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029844264] [2024-06-14 12:25:53,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:53,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:53,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:53,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:53,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:25:53,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 674 transitions, 9162 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:53,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:53,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:25:53,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:55,558 INFO L124 PetriNetUnfolderBase]: 3838/5855 cut-off events. [2024-06-14 12:25:55,558 INFO L125 PetriNetUnfolderBase]: For 2167168/2167176 co-relation queries the response was YES. [2024-06-14 12:25:55,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76545 conditions, 5855 events. 3838/5855 cut-off events. For 2167168/2167176 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32972 event pairs, 654 based on Foata normal form. 4/5842 useless extension candidates. Maximal degree in co-relation 76324. Up to 5178 conditions per place. [2024-06-14 12:25:55,672 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 573 selfloop transitions, 129 changer transitions 0/706 dead transitions. [2024-06-14 12:25:55,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 706 transitions, 11690 flow [2024-06-14 12:25:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:25:55,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 12:25:55,682 INFO L175 Difference]: Start difference. First operand has 450 places, 674 transitions, 9162 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:25:55,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 706 transitions, 11690 flow [2024-06-14 12:26:05,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 706 transitions, 11466 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:26:05,640 INFO L231 Difference]: Finished difference. Result has 453 places, 683 transitions, 9624 flow [2024-06-14 12:26:05,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8938, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9624, PETRI_PLACES=453, PETRI_TRANSITIONS=683} [2024-06-14 12:26:05,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-14 12:26:05,641 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 683 transitions, 9624 flow [2024-06-14 12:26:05,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:05,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:05,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:05,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:26:05,642 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)] === [2024-06-14 12:26:05,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:05,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1416414988, now seen corresponding path program 12 times [2024-06-14 12:26:05,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:05,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125055803] [2024-06-14 12:26:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:05,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:06,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:06,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125055803] [2024-06-14 12:26:06,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125055803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:06,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:06,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:06,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232174705] [2024-06-14 12:26:06,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:06,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:06,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:26:06,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 683 transitions, 9624 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:06,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:06,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:26:06,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:08,506 INFO L124 PetriNetUnfolderBase]: 3832/5857 cut-off events. [2024-06-14 12:26:08,506 INFO L125 PetriNetUnfolderBase]: For 2172337/2172345 co-relation queries the response was YES. [2024-06-14 12:26:08,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76464 conditions, 5857 events. 3832/5857 cut-off events. For 2172337/2172345 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33049 event pairs, 613 based on Foata normal form. 4/5851 useless extension candidates. Maximal degree in co-relation 76241. Up to 5543 conditions per place. [2024-06-14 12:26:08,609 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 657 selfloop transitions, 42 changer transitions 0/703 dead transitions. [2024-06-14 12:26:08,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 703 transitions, 11100 flow [2024-06-14 12:26:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 12:26:08,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 12:26:08,610 INFO L175 Difference]: Start difference. First operand has 453 places, 683 transitions, 9624 flow. Second operand 9 states and 142 transitions. [2024-06-14 12:26:08,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 703 transitions, 11100 flow [2024-06-14 12:26:16,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 703 transitions, 10726 flow, removed 128 selfloop flow, removed 4 redundant places. [2024-06-14 12:26:16,838 INFO L231 Difference]: Finished difference. Result has 458 places, 683 transitions, 9340 flow [2024-06-14 12:26:16,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9250, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9340, PETRI_PLACES=458, PETRI_TRANSITIONS=683} [2024-06-14 12:26:16,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-14 12:26:16,838 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 683 transitions, 9340 flow [2024-06-14 12:26:16,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:16,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:16,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:16,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:26:16,839 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)] === [2024-06-14 12:26:16,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:16,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1416414771, now seen corresponding path program 5 times [2024-06-14 12:26:16,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:16,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911467143] [2024-06-14 12:26:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:16,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:17,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:17,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911467143] [2024-06-14 12:26:17,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911467143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:17,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:17,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:17,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404449371] [2024-06-14 12:26:17,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:17,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:17,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:17,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:26:17,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 683 transitions, 9340 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:17,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:17,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:26:17,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:19,627 INFO L124 PetriNetUnfolderBase]: 3832/5856 cut-off events. [2024-06-14 12:26:19,627 INFO L125 PetriNetUnfolderBase]: For 2178928/2178936 co-relation queries the response was YES. [2024-06-14 12:26:19,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76129 conditions, 5856 events. 3832/5856 cut-off events. For 2178928/2178936 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33046 event pairs, 613 based on Foata normal form. 4/5850 useless extension candidates. Maximal degree in co-relation 75904. Up to 5543 conditions per place. [2024-06-14 12:26:19,739 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 659 selfloop transitions, 43 changer transitions 0/706 dead transitions. [2024-06-14 12:26:19,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 706 transitions, 10933 flow [2024-06-14 12:26:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 12:26:19,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 12:26:19,741 INFO L175 Difference]: Start difference. First operand has 458 places, 683 transitions, 9340 flow. Second operand 9 states and 142 transitions. [2024-06-14 12:26:19,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 706 transitions, 10933 flow [2024-06-14 12:26:29,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 706 transitions, 10775 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 12:26:29,443 INFO L231 Difference]: Finished difference. Result has 459 places, 686 transitions, 9395 flow [2024-06-14 12:26:29,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9198, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9395, PETRI_PLACES=459, PETRI_TRANSITIONS=686} [2024-06-14 12:26:29,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-14 12:26:29,443 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 686 transitions, 9395 flow [2024-06-14 12:26:29,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:29,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:29,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:29,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:26:29,445 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)] === [2024-06-14 12:26:29,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:29,445 INFO L85 PathProgramCache]: Analyzing trace with hash 748731088, now seen corresponding path program 10 times [2024-06-14 12:26:29,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:29,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967778903] [2024-06-14 12:26:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:29,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:30,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:30,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967778903] [2024-06-14 12:26:30,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967778903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:30,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:30,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:30,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015224927] [2024-06-14 12:26:30,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:30,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:30,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:30,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:26:30,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 686 transitions, 9395 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:30,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:30,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:26:30,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:32,168 INFO L124 PetriNetUnfolderBase]: 3858/5901 cut-off events. [2024-06-14 12:26:32,168 INFO L125 PetriNetUnfolderBase]: For 2232820/2232831 co-relation queries the response was YES. [2024-06-14 12:26:32,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76887 conditions, 5901 events. 3858/5901 cut-off events. For 2232820/2232831 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33434 event pairs, 696 based on Foata normal form. 4/5891 useless extension candidates. Maximal degree in co-relation 76661. Up to 4893 conditions per place. [2024-06-14 12:26:32,278 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 200 changer transitions 0/709 dead transitions. [2024-06-14 12:26:32,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 709 transitions, 12013 flow [2024-06-14 12:26:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:26:32,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:26:32,279 INFO L175 Difference]: Start difference. First operand has 459 places, 686 transitions, 9395 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:26:32,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 709 transitions, 12013 flow [2024-06-14 12:26:40,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 709 transitions, 11848 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 12:26:40,077 INFO L231 Difference]: Finished difference. Result has 460 places, 692 transitions, 9814 flow [2024-06-14 12:26:40,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9230, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9814, PETRI_PLACES=460, PETRI_TRANSITIONS=692} [2024-06-14 12:26:40,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-14 12:26:40,078 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 692 transitions, 9814 flow [2024-06-14 12:26:40,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:40,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:40,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:40,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:26:40,078 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)] === [2024-06-14 12:26:40,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1586153540, now seen corresponding path program 13 times [2024-06-14 12:26:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:40,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455998647] [2024-06-14 12:26:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:40,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:41,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:41,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455998647] [2024-06-14 12:26:41,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455998647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:41,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:41,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:41,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360093563] [2024-06-14 12:26:41,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:41,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:41,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:41,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:26:41,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 692 transitions, 9814 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:41,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:41,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:26:41,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:43,150 INFO L124 PetriNetUnfolderBase]: 3868/5890 cut-off events. [2024-06-14 12:26:43,150 INFO L125 PetriNetUnfolderBase]: For 2263795/2263803 co-relation queries the response was YES. [2024-06-14 12:26:43,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77731 conditions, 5890 events. 3868/5890 cut-off events. For 2263795/2263803 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33097 event pairs, 626 based on Foata normal form. 4/5877 useless extension candidates. Maximal degree in co-relation 77504. Up to 5148 conditions per place. [2024-06-14 12:26:43,262 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 554 selfloop transitions, 156 changer transitions 0/714 dead transitions. [2024-06-14 12:26:43,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 714 transitions, 11490 flow [2024-06-14 12:26:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:26:43,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 12:26:43,264 INFO L175 Difference]: Start difference. First operand has 460 places, 692 transitions, 9814 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:26:43,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 714 transitions, 11490 flow [2024-06-14 12:26:51,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 714 transitions, 11069 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:26:51,919 INFO L231 Difference]: Finished difference. Result has 465 places, 695 transitions, 9865 flow [2024-06-14 12:26:51,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9393, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9865, PETRI_PLACES=465, PETRI_TRANSITIONS=695} [2024-06-14 12:26:51,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-14 12:26:51,920 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 695 transitions, 9865 flow [2024-06-14 12:26:51,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:51,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:51,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:51,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:26:51,921 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)] === [2024-06-14 12:26:51,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1288896870, now seen corresponding path program 14 times [2024-06-14 12:26:51,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:51,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854679005] [2024-06-14 12:26:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:51,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:52,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:52,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854679005] [2024-06-14 12:26:52,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854679005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:52,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:52,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:52,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651789207] [2024-06-14 12:26:52,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:52,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:52,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:52,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:53,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:26:53,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 695 transitions, 9865 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:53,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:53,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:26:53,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:54,839 INFO L124 PetriNetUnfolderBase]: 3878/5922 cut-off events. [2024-06-14 12:26:54,839 INFO L125 PetriNetUnfolderBase]: For 2294918/2294926 co-relation queries the response was YES. [2024-06-14 12:26:54,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78339 conditions, 5922 events. 3878/5922 cut-off events. For 2294918/2294926 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33435 event pairs, 616 based on Foata normal form. 4/5916 useless extension candidates. Maximal degree in co-relation 78111. Up to 5587 conditions per place. [2024-06-14 12:26:54,943 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 660 selfloop transitions, 51 changer transitions 0/715 dead transitions. [2024-06-14 12:26:54,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 715 transitions, 11507 flow [2024-06-14 12:26:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:54,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:26:54,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 12:26:54,944 INFO L175 Difference]: Start difference. First operand has 465 places, 695 transitions, 9865 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:26:54,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 715 transitions, 11507 flow [2024-06-14 12:27:03,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 715 transitions, 11057 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-14 12:27:03,381 INFO L231 Difference]: Finished difference. Result has 467 places, 698 transitions, 9683 flow [2024-06-14 12:27:03,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9415, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9683, PETRI_PLACES=467, PETRI_TRANSITIONS=698} [2024-06-14 12:27:03,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-14 12:27:03,381 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 698 transitions, 9683 flow [2024-06-14 12:27:03,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:03,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:03,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:03,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 12:27:03,382 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)] === [2024-06-14 12:27:03,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash 748725508, now seen corresponding path program 11 times [2024-06-14 12:27:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:03,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852360113] [2024-06-14 12:27:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:03,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:04,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:04,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852360113] [2024-06-14 12:27:04,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852360113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:04,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:04,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:04,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531950108] [2024-06-14 12:27:04,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:04,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:04,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:04,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:04,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:04,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:27:04,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 698 transitions, 9683 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:04,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:04,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:27:04,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:06,002 INFO L124 PetriNetUnfolderBase]: 3872/5921 cut-off events. [2024-06-14 12:27:06,003 INFO L125 PetriNetUnfolderBase]: For 2296258/2296269 co-relation queries the response was YES. [2024-06-14 12:27:06,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77828 conditions, 5921 events. 3872/5921 cut-off events. For 2296258/2296269 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33523 event pairs, 695 based on Foata normal form. 4/5911 useless extension candidates. Maximal degree in co-relation 77599. Up to 4916 conditions per place. [2024-06-14 12:27:06,116 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 504 selfloop transitions, 206 changer transitions 0/714 dead transitions. [2024-06-14 12:27:06,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 714 transitions, 11833 flow [2024-06-14 12:27:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:27:06,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:27:06,117 INFO L175 Difference]: Start difference. First operand has 467 places, 698 transitions, 9683 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:27:06,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 714 transitions, 11833 flow [2024-06-14 12:27:14,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 714 transitions, 11527 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-14 12:27:14,440 INFO L231 Difference]: Finished difference. Result has 468 places, 698 transitions, 9795 flow [2024-06-14 12:27:14,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9377, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9795, PETRI_PLACES=468, PETRI_TRANSITIONS=698} [2024-06-14 12:27:14,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-14 12:27:14,441 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 698 transitions, 9795 flow [2024-06-14 12:27:14,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:14,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:14,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:14,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 12:27:14,441 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)] === [2024-06-14 12:27:14,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1593505190, now seen corresponding path program 15 times [2024-06-14 12:27:14,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:14,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277799913] [2024-06-14 12:27:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:14,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:15,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277799913] [2024-06-14 12:27:15,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277799913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:15,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:15,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164857431] [2024-06-14 12:27:15,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:15,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:15,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:15,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:27:15,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 698 transitions, 9795 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:15,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:15,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:27:15,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:17,559 INFO L124 PetriNetUnfolderBase]: 3938/5983 cut-off events. [2024-06-14 12:27:17,559 INFO L125 PetriNetUnfolderBase]: For 2425847/2425855 co-relation queries the response was YES. [2024-06-14 12:27:17,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81120 conditions, 5983 events. 3938/5983 cut-off events. For 2425847/2425855 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33657 event pairs, 637 based on Foata normal form. 4/5970 useless extension candidates. Maximal degree in co-relation 80890. Up to 5049 conditions per place. [2024-06-14 12:27:17,667 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 523 selfloop transitions, 214 changer transitions 0/741 dead transitions. [2024-06-14 12:27:17,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 741 transitions, 13139 flow [2024-06-14 12:27:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:27:17,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:27:17,668 INFO L175 Difference]: Start difference. First operand has 468 places, 698 transitions, 9795 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:27:17,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 741 transitions, 13139 flow [2024-06-14 12:27:26,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 741 transitions, 12549 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 12:27:26,612 INFO L231 Difference]: Finished difference. Result has 471 places, 717 transitions, 10586 flow [2024-06-14 12:27:26,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9205, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10586, PETRI_PLACES=471, PETRI_TRANSITIONS=717} [2024-06-14 12:27:26,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-14 12:27:26,613 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 717 transitions, 10586 flow [2024-06-14 12:27:26,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:26,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:26,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:26,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 12:27:26,613 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:26,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:26,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1288897087, now seen corresponding path program 6 times [2024-06-14 12:27:26,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:26,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366394562] [2024-06-14 12:27:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:26,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:27,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:27,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366394562] [2024-06-14 12:27:27,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366394562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:27,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:27,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:27,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312683599] [2024-06-14 12:27:27,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:27,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:27,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:27,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:27,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:27,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:27:27,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 717 transitions, 10586 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:27,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:27,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:27:27,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:29,519 INFO L124 PetriNetUnfolderBase]: 3943/6009 cut-off events. [2024-06-14 12:27:29,520 INFO L125 PetriNetUnfolderBase]: For 2447007/2447015 co-relation queries the response was YES. [2024-06-14 12:27:29,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82133 conditions, 6009 events. 3943/6009 cut-off events. For 2447007/2447015 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33919 event pairs, 621 based on Foata normal form. 3/6002 useless extension candidates. Maximal degree in co-relation 81900. Up to 5680 conditions per place. [2024-06-14 12:27:29,641 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 681 selfloop transitions, 51 changer transitions 0/736 dead transitions. [2024-06-14 12:27:29,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 736 transitions, 12207 flow [2024-06-14 12:27:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 12:27:29,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 12:27:29,642 INFO L175 Difference]: Start difference. First operand has 471 places, 717 transitions, 10586 flow. Second operand 9 states and 140 transitions. [2024-06-14 12:27:29,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 736 transitions, 12207 flow [2024-06-14 12:27:37,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 736 transitions, 11845 flow, removed 125 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:37,490 INFO L231 Difference]: Finished difference. Result has 477 places, 720 transitions, 10445 flow [2024-06-14 12:27:37,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10224, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10445, PETRI_PLACES=477, PETRI_TRANSITIONS=720} [2024-06-14 12:27:37,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-14 12:27:37,491 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 720 transitions, 10445 flow [2024-06-14 12:27:37,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:37,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:37,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:37,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 12:27:37,492 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:37,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash 756498820, now seen corresponding path program 16 times [2024-06-14 12:27:37,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:37,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382982228] [2024-06-14 12:27:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:37,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:38,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382982228] [2024-06-14 12:27:38,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382982228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:38,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:38,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:38,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101081184] [2024-06-14 12:27:38,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:38,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:27:38,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 720 transitions, 10445 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:38,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:38,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:27:38,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:40,853 INFO L124 PetriNetUnfolderBase]: 3945/5994 cut-off events. [2024-06-14 12:27:40,854 INFO L125 PetriNetUnfolderBase]: For 2462797/2462805 co-relation queries the response was YES. [2024-06-14 12:27:40,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81525 conditions, 5994 events. 3945/5994 cut-off events. For 2462797/2462805 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 33682 event pairs, 636 based on Foata normal form. 4/5981 useless extension candidates. Maximal degree in co-relation 81290. Up to 5060 conditions per place. [2024-06-14 12:27:40,976 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 526 selfloop transitions, 217 changer transitions 0/747 dead transitions. [2024-06-14 12:27:40,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 747 transitions, 12901 flow [2024-06-14 12:27:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:27:40,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:27:40,977 INFO L175 Difference]: Start difference. First operand has 477 places, 720 transitions, 10445 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:27:40,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 747 transitions, 12901 flow [2024-06-14 12:27:50,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 747 transitions, 12721 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:27:50,338 INFO L231 Difference]: Finished difference. Result has 480 places, 725 transitions, 10929 flow [2024-06-14 12:27:50,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10265, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10929, PETRI_PLACES=480, PETRI_TRANSITIONS=725} [2024-06-14 12:27:50,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-14 12:27:50,339 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 725 transitions, 10929 flow [2024-06-14 12:27:50,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:50,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:50,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:50,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 12:27:50,339 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:50,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash 761861200, now seen corresponding path program 17 times [2024-06-14 12:27:50,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:50,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868427643] [2024-06-14 12:27:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:50,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:51,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:51,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868427643] [2024-06-14 12:27:51,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868427643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:51,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:51,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:51,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153729300] [2024-06-14 12:27:51,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:51,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:51,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:51,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:27:51,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 725 transitions, 10929 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:51,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:51,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:27:51,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:53,561 INFO L124 PetriNetUnfolderBase]: 3939/6012 cut-off events. [2024-06-14 12:27:53,562 INFO L125 PetriNetUnfolderBase]: For 2469543/2469551 co-relation queries the response was YES. [2024-06-14 12:27:53,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81880 conditions, 6012 events. 3939/6012 cut-off events. For 2469543/2469551 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 33986 event pairs, 617 based on Foata normal form. 4/6006 useless extension candidates. Maximal degree in co-relation 81643. Up to 5616 conditions per place. [2024-06-14 12:27:53,752 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 663 selfloop transitions, 77 changer transitions 0/744 dead transitions. [2024-06-14 12:27:53,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 744 transitions, 12819 flow [2024-06-14 12:27:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:27:53,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:27:53,753 INFO L175 Difference]: Start difference. First operand has 480 places, 725 transitions, 10929 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:27:53,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 744 transitions, 12819 flow [2024-06-14 12:28:02,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 744 transitions, 12233 flow, removed 135 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:02,322 INFO L231 Difference]: Finished difference. Result has 484 places, 725 transitions, 10503 flow [2024-06-14 12:28:02,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10343, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10503, PETRI_PLACES=484, PETRI_TRANSITIONS=725} [2024-06-14 12:28:02,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-14 12:28:02,322 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 725 transitions, 10503 flow [2024-06-14 12:28:02,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:02,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:02,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:02,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 12:28:02,323 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:02,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:02,323 INFO L85 PathProgramCache]: Analyzing trace with hash 378292378, now seen corresponding path program 12 times [2024-06-14 12:28:02,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:02,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714187201] [2024-06-14 12:28:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:02,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:03,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:03,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714187201] [2024-06-14 12:28:03,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714187201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:03,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:03,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:03,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288962834] [2024-06-14 12:28:03,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:03,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:03,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:03,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:28:03,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 725 transitions, 10503 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:03,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:03,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:28:03,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:05,511 INFO L124 PetriNetUnfolderBase]: 3941/6016 cut-off events. [2024-06-14 12:28:05,511 INFO L125 PetriNetUnfolderBase]: For 2479597/2479608 co-relation queries the response was YES. [2024-06-14 12:28:05,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81064 conditions, 6016 events. 3941/6016 cut-off events. For 2479597/2479608 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 34101 event pairs, 702 based on Foata normal form. 4/6006 useless extension candidates. Maximal degree in co-relation 80826. Up to 5013 conditions per place. [2024-06-14 12:28:05,621 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 535 selfloop transitions, 204 changer transitions 0/743 dead transitions. [2024-06-14 12:28:05,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 743 transitions, 12485 flow [2024-06-14 12:28:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:28:05,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:28:05,623 INFO L175 Difference]: Start difference. First operand has 484 places, 725 transitions, 10503 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:28:05,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 743 transitions, 12485 flow [2024-06-14 12:28:14,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 743 transitions, 12288 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 12:28:14,147 INFO L231 Difference]: Finished difference. Result has 484 places, 728 transitions, 10805 flow [2024-06-14 12:28:14,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10306, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10805, PETRI_PLACES=484, PETRI_TRANSITIONS=728} [2024-06-14 12:28:14,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-14 12:28:14,147 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 728 transitions, 10805 flow [2024-06-14 12:28:14,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:14,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:14,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:14,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 12:28:14,148 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:14,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1599059367, now seen corresponding path program 7 times [2024-06-14 12:28:14,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:14,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049771698] [2024-06-14 12:28:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:14,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049771698] [2024-06-14 12:28:15,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049771698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:15,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:15,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:15,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897568902] [2024-06-14 12:28:15,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:15,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:15,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:15,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:15,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:28:15,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 728 transitions, 10805 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:15,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:15,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:28:15,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:17,669 INFO L124 PetriNetUnfolderBase]: 3946/6021 cut-off events. [2024-06-14 12:28:17,670 INFO L125 PetriNetUnfolderBase]: For 2495363/2495367 co-relation queries the response was YES. [2024-06-14 12:28:17,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81696 conditions, 6021 events. 3946/6021 cut-off events. For 2495363/2495367 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34017 event pairs, 663 based on Foata normal form. 2/6021 useless extension candidates. Maximal degree in co-relation 81457. Up to 5830 conditions per place. [2024-06-14 12:28:17,900 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 722 selfloop transitions, 20 changer transitions 0/746 dead transitions. [2024-06-14 12:28:17,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 746 transitions, 12432 flow [2024-06-14 12:28:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 12:28:17,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-14 12:28:17,901 INFO L175 Difference]: Start difference. First operand has 484 places, 728 transitions, 10805 flow. Second operand 9 states and 133 transitions. [2024-06-14 12:28:17,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 746 transitions, 12432 flow [2024-06-14 12:28:29,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 746 transitions, 12082 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:29,257 INFO L231 Difference]: Finished difference. Result has 489 places, 732 transitions, 10618 flow [2024-06-14 12:28:29,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10455, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10618, PETRI_PLACES=489, PETRI_TRANSITIONS=732} [2024-06-14 12:28:29,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-14 12:28:29,258 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 732 transitions, 10618 flow [2024-06-14 12:28:29,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:29,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:29,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:29,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 12:28:29,259 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:29,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1301783880, now seen corresponding path program 18 times [2024-06-14 12:28:29,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:29,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724236994] [2024-06-14 12:28:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:30,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:30,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724236994] [2024-06-14 12:28:30,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724236994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:30,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:30,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773083970] [2024-06-14 12:28:30,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:30,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:30,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:30,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:30,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:28:30,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 732 transitions, 10618 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:30,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:30,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:28:30,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:32,539 INFO L124 PetriNetUnfolderBase]: 3940/6008 cut-off events. [2024-06-14 12:28:32,539 INFO L125 PetriNetUnfolderBase]: For 2506930/2506938 co-relation queries the response was YES. [2024-06-14 12:28:32,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80784 conditions, 6008 events. 3940/6008 cut-off events. For 2506930/2506938 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34004 event pairs, 619 based on Foata normal form. 4/6002 useless extension candidates. Maximal degree in co-relation 80543. Up to 5621 conditions per place. [2024-06-14 12:28:32,664 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 673 selfloop transitions, 75 changer transitions 0/752 dead transitions. [2024-06-14 12:28:32,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 752 transitions, 12249 flow [2024-06-14 12:28:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:28:32,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:28:32,665 INFO L175 Difference]: Start difference. First operand has 489 places, 732 transitions, 10618 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:28:32,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 752 transitions, 12249 flow [2024-06-14 12:28:43,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 752 transitions, 12008 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:43,258 INFO L231 Difference]: Finished difference. Result has 492 places, 733 transitions, 10570 flow [2024-06-14 12:28:43,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10403, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10570, PETRI_PLACES=492, PETRI_TRANSITIONS=733} [2024-06-14 12:28:43,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-14 12:28:43,259 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 733 transitions, 10570 flow [2024-06-14 12:28:43,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:43,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:43,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:43,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 12:28:43,259 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:43,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:43,260 INFO L85 PathProgramCache]: Analyzing trace with hash 383833907, now seen corresponding path program 8 times [2024-06-14 12:28:43,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:43,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421080479] [2024-06-14 12:28:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:43,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:44,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:44,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421080479] [2024-06-14 12:28:44,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421080479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:44,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:44,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912138321] [2024-06-14 12:28:44,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:44,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:44,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:44,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:44,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:28:44,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 733 transitions, 10570 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:44,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:44,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:28:44,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:46,635 INFO L124 PetriNetUnfolderBase]: 3966/6042 cut-off events. [2024-06-14 12:28:46,635 INFO L125 PetriNetUnfolderBase]: For 2562778/2562786 co-relation queries the response was YES. [2024-06-14 12:28:46,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81901 conditions, 6042 events. 3966/6042 cut-off events. For 2562778/2562786 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34192 event pairs, 621 based on Foata normal form. 4/6036 useless extension candidates. Maximal degree in co-relation 81659. Up to 5655 conditions per place. [2024-06-14 12:28:46,756 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 674 selfloop transitions, 86 changer transitions 0/764 dead transitions. [2024-06-14 12:28:46,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 764 transitions, 13317 flow [2024-06-14 12:28:46,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:28:46,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 12:28:46,758 INFO L175 Difference]: Start difference. First operand has 492 places, 733 transitions, 10570 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:28:46,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 764 transitions, 13317 flow Killed by 15